Geological Survey of India Regional Training Institute, Eastern Region

Sundarbans creek & mangrove

EDITORIAL BOARD Atanu Ray, Director Swapan Kumar Guha, Director Sandip Goswami, Sr. Geologist P.K. Datta, Sr. Geologist Keya Basu, LIA Deepak Kumar, JTA (Geology)

Under supervision of Prasanta Mishra, Director Publication Division

and overall guidance of Mandapalli Raju Additional Director General & HOD, Eastern Region Geological Survey of India, Kolkata

The ‘News’ of the Region is an attempt to unfurl before us a kaleidoscope of significant events and highlights of the Region’s activities and it gives me immense pleasure to note that Eastern Region has come up with its e-news which is overwhelming. I would like to thank and appreciate the contributors and the Publication Division for the wide spectrum of the articles in the e-news showcasing different activities of the Region. Eastern Region is one of the biggest Regions of GSI covering mineral rich states of Jharkhand, Odisha, Bihar, West Bengal and Union Territory of Andaman & Nicobar Islands. It plays pivotal role in nation building since 1961, the year of its establishment. In FS 2014-15, altogether 92 standard items excluding the service items, encompassing Mission-I to Mission-IV were executed based on need and strength of the Region. The mentors of the Region moulded young officers in such a way that they are able to face challenges of ever growing scientific world and stand out competent, committed, conscientious and compassionate individuals. All projects were meticulously and systematically executed, envisaged target of each project was successfully achieved and objectives were fulfilled because of sincerity, dedication and motivation of all scientific community and supportive officials. The capacity building of officers and staff received a boost through dedicated activities of Regional Training Institute (RTI), ER which conducted need based training programmes through its regional based unit and field training centres. A few courses had also been conducted for students of different universities/colleges in order to produce efficient geoscientists for tomorrow. I take this opportunity to thank all officers who have worked hard to succeed in all our endeavours and staff who supported all our initiative with genuine enthusiasm. Let us resolve that in the coming years we will work with utmost sincerity, dedication & alacrity.

(Mandapalli Raju) Additional Director General and Head of Department, Eastern Region, Geological Survey of India, Kolkata Our Head of the Department

Shri Mandapalli Raju, Additional Director General & HoD, Eastern Region, Geological Survey of India, belongs to 1979 UPSC batch, joined the department as Geologist at Northern Region, Lucknow on th 12 December, 1980. Initially, he was associated with Mineral Investigation projects in Uttar Pradesh Circle and subsequently he was shifted to Engineering Geology Division where he was associated with geotechnical investigations of various civil engineering projects and landslide/slope stability studies, which were immensely useful in formulation and execution of projects and to adopt safe and economic measures. He has authored about 150 reports, apart from several scientific papers published in various journals. He has made commendable contributions in a number of civil engineering projects in the Himalayas (Uttarakhand), Arakan-Yoma mountain ranges in North Eastern Region as well as in peninsular shield areas of Andhra Pradesh. Further, he has rendered his expertise in various hydroelectric projects in Nepal, Bhutan and Myanmar too.

He contributed to geotechnical studies at Srisailam Left Bank Underground Hydroelectric Project, Andhra Pradesh, in which massive excavation was involved for locating large underground power house caverns and pressure tunnel system. His geotechnical inputs and findings at Srisailam Hydroelectric Project were appreciated on different occasions by officials and consultants of the World Bank and O.E.C.F., Japan -the funding agencies of the projects concerned. His contribution was noteworthy at other prestigious projects like Nagarjunasagar Left Canal Hydroelectric Project, Yeleru Reservoir Project where tunnelling and massive underground works were involved. Geotechnical studies carried out at Telugu Ganga Project Dam foundations, slope stability studies along Srisailam left branch canal and Telugu Ganga Project canal systems are some of other significant contributions. He was associated in geotechnical investigations of Vishnuprayag Hydel Scheme and many other river valley projects in Alaknanda and Dhauliganga valleys in the Central Himalayas. His association with engineering geological investigations in neighbouring countries, especially at Punatsangchhu I&II, Amochhu and Kholongchhu Hydroelectric Projects in Bhutan, Saptkoshi-Sunkoshi hydroelectric projects in Nepal, Tamanthi Hydroelectric Project in Myanmar were immensely significant.

Shri Raju, as National Head of Mission-IV at Central Headquarters in recent past has given a new shape and impetus towards societal issues of Geological Survey of India. Presently, as Additional Director General & Head of the Department, Eastern Region, his vibrant endeavour and pragmatic role to take up activities of the Region in a new dimension and to greater heights is noteworthy.

***

Pramatha Nath Bose (1855–1934) Born on May 12, 1855 in a remote village of Gaipur, in 24 Parganas district, West Bengal, Pramatha Nath Bose was educated at Krishnagar College and later at St. Xavier's College of the University of Calcutta when he obtained a Gilchrist scholarship to study in London in 1874. He graduated in science from London University and passed out from the Royal School of Mines in 1878. During his study at Cambridge he became a friend of Rabindranath Tagore. He was one of the early Indians to join the Geological Survey of India as a graded officer. His initial work was on the Siwalik fossils. He is credited with the discovery of petroleum in Assam and discovery of iron ore mines in Dhulli and Rajhara in Madhya Pradesh and setting up of the first soap factory in India. The most outstanding achievement of his life was the discovery of iron ore deposits in the hills of Gorumahisani in the state of Mayurbhanj. He was instrumental in the setting up of Jamshedpur by writing to J. N. Tata about the rich iron ore reserves, which led to the establishment of Tata Iron and Steel Company. His tremendous contribution in this field not only played a pivotal role in building up of modern India but still playing a vital role in ongoing development of the nation. He will be remembered as pioneering geologist and palaeontologist in India.

OUR REGION EASTERN REGION ESTABLISHED: 1961

Area Details In Sq Km Total surface Area 4,26,090 Bihar 94,162 Jharkhand 79,714 Odisha 1,55,707 West Bengal 88,180 Andaman & Nicobar Islands 8,327

Strength of Geoscientist* Grade Geology Geophysics Chemical Engineering JTS (Jr.) 100 11 19 2 STS (Sr.) 36 6 6 5 JAG (Supdt.) 44 2 1 0 SG (Dir.) 23 0 1 2 SAG (D.D.G.) 4 1 2 0 HG (A.D.G.) 0 0 0 0 Total 207 20 29 9 *Source: - Briefing Book of Eastern Region up to Dec 2014

MINERAL DISCOVERIES

 Iron ore deposits in Jharkhand and Odisha  PGE of Boula-Nuasahi Complex, Odisha  Manganese deposits in Bolangir & Sundargarh Dist., Odisha  Chromite in Sukinda, Odisha  Copper in Singhbhum Copper Belt Jharkhand  Gold in Parasi Sindouri area in Jharkhand  Lead Zinc in Sargipalli, Odisha  Bauxite deposit of East Coast  Cesium from Chhotanagpur Gneissic terrain of Purulia Dist. West.Bengal  Apatite in Purulia Dist. West Bengal  Beach Placer deposits in Odisha off-shore  Coal and lignite

ENGINEERING PROJECTS

 Bakreshwar Thermal Power Project  Jaldhaka (Stage I & II),Rammam (Stage I,II& III), Purulia Pump Storage Project: 900MW  Farakka Barrage across River Ganga, Kangsabati Irrigation Project  Hirakud, Upper Indravati, Upper Kolab, Rengali, Bheemkund Projects  Damodar Valley Corporation (Maithon. Tilaiya, Panchet),  Tenughat, Subarnarekha Multi Purpose Projects, North Koel, Durgabati, Punasi  Railway and Bridges  River Linking Projects

 Geological Mapping/ Geochemical Mapping / Geophysical Mapping  Mineral Investigation  Geotechnical Investigation  Landslide Hazard Studies  Geoenvironmental Studies  Earthquake and MEQ Studies  Petrological Studies  Palaeontological Studies  Marine and Coastal Studies  Human Resource Development  IT Activities  Data Dissemination-Map Compilation, Publication and Technical Consultancy Services.

SCIENTIFIC ARTICLES

Sr No. CONTENT P. No 1 Delineation of Coal Seams by Geophysical Logging of Borehole in Bandbahal Block, IB-River 1 Coalfield, Odisha S.K.Biswas, A.K.Roy Choudhury & V.K.Tyagi 2 Geophysical Investigation for Chromite in North Bhuasuni Parbat Block, Dhenkanal District, Odisha 3 Awadhesh Kumar 3 Magneto-Telluric (MT) Survey over Geothermal Region Delineating Basinal Configuration and 7 Lineament /Fault of Bakreswar, West Bengal. Dr. D.C. Naskar, Gita Gupta 4 Geophysical Mapping in Parts of Ranchi and Singhbhum Districts of Jharkhand 13 Dr. Nabendu Majumdar, Maloy Kumar Bhowmic and Dr. Ranjan Mukherjee 5 Geophysical Investigation for Gold in Volcano-Sediments, Volcanics and Associated Plutonic Rocks 19 around Majhauli-Ajaynagar-Ghansura of Gaya District, Bihar P. C. Das and Ajay Kumar 6 Seismic Hazard Assessment of Darbhanga Urban Agglomeration, Darbhanga District, Bihar 22 S.V.N. Chandrasekhar, Pushpita Bhaduri 7 Geophysical Mapping in Parts of Ramgarh, Ranchi, Hazaribagh, Chatra and Bokaro Districts of 25 Jharkhand Dr. P.N.Nagaraja, S.K. Roy and M. Ramesh 8 Manganese Micronodules over Polycystine Radiolarians from Central Andaman Basin, 27 Sanjay Kumar Verma, Danish Anwar and Ashish Kumar Jha, 9 Investigation for Gold in Volcano-Sediments, Volcanics and Associated Plutonic Rocks around 28 Majhauli – Ajaynagar – Ghansura area of Gaya District, Bihar Dr. Mansoor Ahmad, Sr.Geologist, Abdul Qayoom Paul, Geologist 10 Investigation for Gold in Northern Brecciated Quartzite-I at Largadih and Largadih East Block, 29 Saraikela- Kharsawan, District, Jharkhand Rajesh Kumar Gupta, Geologist 11 Investigation for Gold in Sindauri- Ghanshyampur Block, Ranchi District, Jharkhand 29 Pushpesh Narayan, Sr. Geologist, Sushanta Layek, Geologist 12 Search for Potentiality of Titanium, and Vanadium in the Bauxite of Serangdag Plateau in Garna- 29 Hanrup-Kabrapat-Risahattoli-Kurhetola area of Gumla District, Jharkhand (G-4) Snehalata Mukherjee, Geologist, Abhilipsa Dash, Geologist 13 Exploration for Iron Ore in Kalamang West Block (Northern Part), Sundargarh District, Odisha 29 Sabyasachi Dutta, Geologist 14 Exploration for Iron Ore in Ghorhaburhani South Block, Sundargarh District, Odisha 30 Srikanth Doradla & Sabyasachi Dutta, Geologists 15 Preliminary Search for Ni, Cr & PGE Group of Elements in Mafic - Ultramafic suite of Rocks in Parts 30 of Bagalia- Sonaijuri- Kashipur- Gopalpur Sector, T.S. 73I/11, Purulia District, West Bengal.

Debabrata Jena, Sr. Geologist, Sagarika Pattanayak, Geologist & Gargi Chakraborti, Geologist 16 Regional Exploration for coal in Rajmahal - Birbhum Coalfield, West Bengal 31 Shailendra Kumar Singh, S.Pradeep Kumar, Anita Kumari, Swapna Hazarika, Abha Urimal Angelina Tirkey and Shreya Shrey

i 17 Gondwana Coal in Mirjagaon area, Hura Northern Extension Block, Rajmahal Group of Coalfields, 31 Bhagalpur District, Bihar RabisankarKarmakar, Geologist & RakeshDeepankar 18 Preliminary Exploration for Coal by Scout Drilling around Gaurangapur–Bankati area towards east of 35 Bistupur-Dandeswar Sector, Raniganj Coalfield, Barddhaman District, West Bengal. A.R.Ekka & Shivangi Kumari, Geologists 19 Characterization and Genesis of Clay Deposits in Tertiary Sediments of Birbhum Coalfield, Birbhum 36 District, West Bengal Subhransu Sanyal, Swapna Hazarika 20 Petrological Studies of the Clay Horizons in Tertiary Sediments of Birbhum Coalfield, Birbhum 38 District, West Bengal Subhransu Sanyal, Swapna Hazarika 21 Characterisation and Petrogenesis of Plutonic and Volcanic Rocks in Munger Group around Rajgir and 40 Gaya, Bihar Swapna Hazarika, Subhransu Sanyal 22 Characterization of Lamproites and Associated Intrusives of West Bokaro Coalfield, West Bengal and 42 Jharkhand. Sudip Bhattacharya, Suptdg Geologist, Dr. Abhijit Roy, Geologist 23 Characterization of Lamproites and Associated intrusives Raniganj Coalfield, West Bengal and 43 Jharkhand Dr Mandakini Maharana, & Mrs Resmi R. C, Geologists 24 Petrological Characterization and Genesis of Ironstone of Barren Measures of Raniganj and West 45 Bokaro Coalfield Dr Mandakini Maharana, & Mrs Resmi R. C, Geologists 25 Occurrence of Archipelago Group in North Andaman Island 47 Tarun Koley and Anju C S 26 DPR Stage Geotechnical Investigation of proposed water supply scheme on Relli River, Kalimpong, 50 Darjeeling District, West Bengal Debasish Bhattacharya & N.R.Bhattacharjee, Superintending Geologists 27 DPR Stage Geotechnical Investigation of Kosi-Mechi link project, Supaul, Araria and Kishanganj 51 Districts, Bihar Debasish Bhattacharya & J. Mukherjee, Superintending Geologists 28 Post Construction Stage Geotechnical Investigation of Rinchington Micro-Hydel Project, Darjeeling 52 District, West Bengal Debasish Bhattacharya & J. Mukherjee, Superintending Geologists

ii DELINEATION OF COAL SEAMS BY GEOPHYSICAL LOGGING OF BOREHOLE IN BANDBAHAL BLOCK, IB-RIVER COALFIELD, ODISHA S.K.Biswas, A.K.Roy Choudhury & V.K.Tyagi During the period, 20 (Twenty) boreholes, including 14 (Fourteen) promotional boreholes, were subjected to Multiparametric geophysical logging involving total meterage of 13,031m from January, 2014 to December, 2014. During this period, 7 boreholes were geophysically logged covering total meterage of 5877m. including 4 promotional boreholes in the coalfields of West Bengal. In the coalfields of Odisha, a total of 10 number of boreholes were subjected to multiparametric geophysical logging involving total meterage of 6632m (All promotional boreholes). However, in the coalfields of Bihar only 1 borehole was logged with 522m target. As such geophysical logging conducted by the division has been proved useful for the detailed study of coal, particularly for the evaluation of depth/thickness of coal seams and precise demarcation of formational interfaces intersected in the boreholes. Geophysical logs as obtained are subjected to qualitative and quantitative interpretations of the borehole log results so as to meet the objectives of the coal exploration of G.S.I. A borehole viz. IBBA-6 was logged in Bandbahal block, IB-River coalfield, Odisha, down to the depth of 837m as promotional item. Under FSP: 2014-15/SER/ER/HQ/2014/006, the borehole IBBA-6 was subjected to geophysical logging on 10th Dec., 2014. Geophysical logs have successfully delineated several coal seams encountered in the borehole within Lower Gondwana Formation. By analyzing the anomalies reflected by the different physical parameters recorded within the borehole, delineation of formational interfaces could be possible. As a matter of fact, coal is characterized by low Neutron (NEUT) and Natural Gamma (NGAM) counts where as Resistance (SPR)/ Resistivity (SHN/LON) is generally of higher magnitude against coal beds. These characteristics of coal stand out clearly on most of the logs and allow identification of coal beds easily. In the present case besides recording of SP and Temperature, mainly SPR, SHN, LON, NGAM and NEUTRON parameters have been considered for identification of coal strata as they depict appreciable contrast against coal bed. On the basis of these parameters, coal beds can be delineated precisely in the boreholes. By analysing the various physical parameters using electrical and radiometric devices, a total of 33 nos. of coal sections of varied thickness (0.5m to 33.0m) have been distinctly identified between 91m and 798m depths within the borehole (Log plate enclosed). Two major thick coal zones of thicknesses of 33m and 15.2m have been successfully delineated between the depth ranges 656.5m and 689.5m, and 590.2m and 605.4m respectively.

2 GEOPHYSICAL INVESTIGATION FOR CHROMITE IN NORTH BHUASUNI PARBAT BLOCK, DHENKANAL DISTRICT, ODISHA Awadhesh Kumar The ground geophysical methods employing magnetic survey (VF) was carried out under approved FSP 2014-15, code No. ME/ER/ODS/2014/001 in north Bhuasuni Parbat block area, Dhenkanal district, Odisha for delineating the zones of chromite body. The area under investigation falling in the Survey of India toposheet No. 73 H/9 and are bounded by A (Lat. 20° 56.052' N : Long. 85° 41.259' E), B (Lat. 20° 56.256'N : Long. 85° 41.796'E), C (Lat. 20° 55.703'N : Long. 85° 42.045'E) & D (Lat. 20° 55.49'N : Long. 85° 41.502'E) (Fig.1). The magnetic method is commonly used for locating chromite bodies within ultramafics. A number of scattered outcrops of chromite bearing ultramafic bodies occurring to the south of Sukinda chromite deposit have been reported from the transition zone of Singhbhum craton and Eastern Ghat Mobile Belt. Central part of the proposed area covered with scattered outcrops of chromiferous ultramafics within charnockite gneiss and quartzite pyroxenite composition. The rocks are deeply weathered and lateritised. The ultramafic rocks occurring to the north of Bhuasuni Parbat (proposed area) are weathered and silicified peridotite/dunite (now serpentinised) with bands and lenses of chromite (GSI FS:2010-12) (Fig.2). Magnetic (VF) surveys carried out for locating ultrabasic/hidden chromite bodies in the laterite/soil covered area in north Bhuasuni Parbat block during the field season 2014-15. Average variations of magnetic (VF) responses observed over the proposed area ranges between -2500 nT and 5900 nT and comprises of irregular high and low values, showing asymmetrical bipolar nature. In North Bhuasuni Parbat block, the magnetic survey has clearly demarcated a strong magnetic high anomalous zone in the central part of the area. The strong magnetic contours are bipolar in nature which indicates the presence of a basic or ultrabasic body in the area at shallower depth. The magnetic high anomaly is also indicating presence of a shear zone. Elongated pattern of high magnetic anomaly observed from W300 to E300 stations and from S200 to N100 traverses. This anomaly zone is clearly indicating the magnetic material present within the area. The geophysical (magnetic vertical field) data have been correlated with available drilling data which suggests that the high magnetic anomalies in the central part of the area are due to disseminated chromite present within ultramafic rock (Fig.3).

4 5

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-700 0 30 -1 - 19 00 00 -7

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6 MAGNETO-TELLURIC (MT) SURVEY OVER GEOTHERMAL REGION DELINEATING BASINAL CONFIGURATION AND LINEAMENT /FAULT OF BAKRESWAR, WEST BENGAL. Dr. D.C. Naskar, Gita Gupta MT survey have been carried out over Bakreswar geothermal region bounded by Lat: 23°45′00″N to 24°05′00″N and Long: 87°15′00″E to 87°25′00″E (Survey of India degree sheet No. 72P & 73M), Birbhum district, West Bengal (Fig. 1). Resistivity profiling has also been carried out in this region to demarcate the conductive zones. The objective of the investigation was to decipher shallow and deep crustal structures and to demarcate the zones of crustal conductors and to prepare a meaningful conceptual model of the area. The thermal springs of Bakreswar occur in a topographically low lying area hosted in a gently rolling terrain which is mostly filled by alluvial or lateritic soil with sporadic exposures of basement crystallines. The basement is predominantly composed of granite gneiss with minor enclaves of calc– silicate, amphibolite, gabbro, pegmatite and dolerite (dyke) — all belong to the Precambrian Chhotanagpur Gneissic Complex (CGC). TE mode 1D model of station Nakrakonda shows top layer resistivity of 92 Ohm-m up to a depth of 28m and then increases to 2801 Ohm-m up to 69m (Fig. 2). This layer is underlain by a high resistive layer up to a depth of 29087m and then decreases to 92 Ohm-m and of thickness 9016 m. The resistivity value again increases and attains a value of 1585 Ohm-m beyond a depth of 38103 m. The interpreted vertical resistivity distribution along Belsara-Rajnagar-Rasunpur traverse is shown in Fig. 3. The subsurface layers are characterized by different resistivity values. The highly resistive crystalline layer below the top-soil is characterized by resistivity varying from 103-78720 Ohm- m and of thickness varying from 1552-29059m at a depth level varying from surface to 93m. The highly conductive layer is clearly brought out below the resistive crystalline rock in all the MT soundings. It is characterized by resistivity ranging from 1-92 Ohm-m and thickness varying from 1443-9016m as well as depth varying from 1557-29087m. The high resistivity basement is interpreted at a depth level varying from 3001-38103m. The basement comes up to a shallow depth (3001m) at station Rajnagar whereas the same occurs at a greater depth (38103m) at Nakrakonda. The steep gradient of basement in between station Rajnagar and Nakrakonda could possibly be attributed to a fault zone. Another fault is inferred due to steep gradient of basement in between Belsara (7484m) and Nakrakonda (38103m). TE apparent resistivity and phase pseudo-section along the Rasunpur-Rajnagar-Belsara traverse (Fig. 4) is shown in the geoelectric section. One highly conductive zone of apparent resistivity 2-32 Ohm- m is observed in between 10-100 seconds through out the observed field apparent resistivity pseudo- section except from Nakrakonda to Bhaadi. Afterwards the high resistive zone is underlain beyond 100 seconds throughout the section. The calculated apparent resistivity pseudo-section indicates a zone of weakness (static shift followed by apparent resistivity 256 Ohm-m) supported by vertical elongations of contours running from Rajnagar in the north to Nakrakonda in the south downthrown towards the southern side and corroborated with the 1D MT section. This may be due to the presence of faults/lineament/fracture/shear zone and accumulation of electric charges along them/faulted boundary. The impression of high resistivity (low phase angle) zone is observed and calculated phase pseudo- sections upto 0.1 second throughout the section. The phase of the impedance is not affected by the near surface inhomogeneities by frequent fluctuations in phase. But the calculated phase pseudo-section is not in agreement with the calculated apparent resistivity pseudo-section regarding static shift problem/zone of weakness and which is the case may be. Moreover the observed apparent resistivity and phase pseudo- sections corroborate well/same signatures by the impressions of opposite colour code. The MT data were inverted using the inversion method to generate 2D subsurface conductivity distribution in the area. These results are depicted in Fig. 5. One prominent high resistive zone is

7 observed in between Belsara and Bhaadi starting from shallow surface to deeper depth. Another high resistive zone is inferred below Idgachha. Two prominent faulted boundaries/contacts are depicted in between Bhaadi and Lokpur, and Idgachha and Rajnagar respectively. The cross-section also shows a highly conductive feature beneath north of Bhaadi and Idgachha region extending from shallow subsurface (5 km) into the deeper crust. The lower crust in the entire profile is rather conductive whereas the upper crust in between Rasunpur and Belsara is resistive respectively. It is thus possible that the entire crust may be highly conductive, intruded by high resistivity block. Bakreswar-Tantloi sector was chosen for deep electrical studies primarily to understand the nature of causative source responsible for geothermal activities in this area. A traverse of 2 km length was laid along Chandrapur-Tantipara section and was observed with dipole length of 100 m with “na” separation of 1600m. Fig. 6 represents the dipole-dipole pseudo-section which brings out a couple of high resistive zones, remarkably two in between station 200-1000m and 1200-2000m at a depth of 400-800m and 500-800m respectively. The causative source of high values of resistivity at a depth of 400-800m might represent dolerite dykes/unaltered granite gneiss. Of particular importance in this traverse is the presence of subsurface conductive bodies (50-400 Ohm-m) mapped between station 1000-1200m at a depth of 400-700m. This may be the structural breaks like shear zones/geothermal region. In view of hot spring activities in nearby area of Bakreswar, such subsurface conductors assume greater significance as a geothermal region. Apart from these, first 100m depth represents top soil/laterite cover followed by a conductive layer up to 300m.

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Dhaka

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Rasunpur

Idgachha Chandrapur Sankarpur Abadnagar Lokpur Bakreswar

Bhaadi Gundoba Kharikabad 23.8 Darbespura

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87.2 87.4 87.6 87.8 88 Fig. 1. Location of the MT observation sites in Bakreswar geothermal region.

Fig. 2. 1D model at station Nakrakonda in Bakreswar geothermal region.

Fig. 3. TE mode 1D geo-electric in Bakreswar geothermal region.

Fig. 4 Apparent resistivity and phase pseudo-sections in Bakreswar geothermal region.

Fig. 5. 2D model in Bakreswar geothermal region.

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Fig. 6. Resistivity depth section in Bakreswar geothermal region.

12 GEOPHYSICAL MAPPING IN PARTS OF RANCHI AND SINGHBHUM DISTRICTS OF JHARKHAND Dr. Nabendu Majumdar, Maloy Kumar Bhowmic and Dr. Ranjan Mukherjee Systematic Gravity and Magnetic (Total Field) surveys were carried out in Toposheet Nos. 73 E/12, F/5, 6, 10 & 11 covering an area of 3500 sq km under the Project National Geophysical Mapping Programme for generating regional gravity and magnetic data set and for identifying structures like folds, faults etc., which may be target zones for detailed mineral investigation. The study area is bounded by Longitudes 85º15' & 85º45'E and Latitudes 22º15' & 23º15'N. It is underlain by parts of Singhbhum Craton (Archaean) and Chhotanagpur Gneissic Complex (Proterozoic). Singhbhum Craton comprises metavolcano-sedimentary sequences of Chandil Formation, Dalma volcanics and Upper Bonai Group (Iron Ore Group) and, igneous suites of Singhbhum and Chakradharpur granites as well as unmetamorphosed sediments of Kolhan Group. Gravity and Magnetic surveys were done on grid pattern with station density of 1 station per 2.5 sq km. Fig.1 shows the general topography of the mapping area as well as locations of gravity and magnetic stations. The area belongs to the Chhotanagpur plateau consisting of flat country in the north and south and hill ranges in between. Plains in the north vary in elevation between 540m and 600m while those in the south show rolling topography with elevation varying between 300m and 350m. Central part of the area is mostly covered by nearly ENE-WSW to NE-SW trending forested hill ranges which are sometimes separated by intervening narrow valleys. General elevation of this high relief domain ranges from about 400m to 700m, with maximum being 825m. Bouguer Gravity Map of the area, as presented in Fig. 2, shows wide variation in anomaly value ranging from -52 mGal to -4 mGal due to diverse lithology. Low gravity signals are associated with Singhbhum Granite, Kolhan sediments and eastern part of Upper Bonai Group occurring in the south of mapping area. Moderate signals in the northern, central and eastern parts are yielded by Chhotanagpur gneisses, Chakradharpur Granite as well as metasediments of Dhalbhum Formation and western part of Upper Bonai Group. High gravity anomaly signatures are resulted from Chandil Formation and Dalma volcanics in the central part of the area because of abundance of high density basic/ ultrabsic bodies. Contact between Chhotanagpur Gneissic Complex and Chandil Formation is reflected from a sharp change in gravity signals along a ENE-WSW trending linear tract. Fig. 3 shows the magnetic anomaly map. Like gravity responses, magnetic values also vary widely between about -450nT and +450nT due to diverse lithological make-up. Compared to the northern part of the area the central and southern parts are characterized by rapid change in magnetic character due to variation in lithology. Low intensity magnetic anomalies in the central and southern parts are due to metavolcano-sediments of Upper Bonai Group, Kolhan sediments, Chakradharpur Granite and Singhbhum Granite. Few isolated magnetic anomalies are attributable to existence of ultrabasic intrusives. Rock suites of North Singhjbhum Fold Belt represented here by a package of Chandil Formation, Dhalbhum Formation and Dalma volcanics in the central part of the area show high intensity anomalies due to presence of a number of basic/ ultrabasic intrusives and volcanoclastic components. Moderate intensity anomalies associated with Chhotanagpur Gneissic Complex in the northern part are attributable to the abundance of biotite gneiss. Fig. 4 for analytic signal of Bouguer gravity anomaly has enhanced some formational contacts and basic/ ultrabasic bodies intrusive into metasediments of Chandil Formation, Dalma volcanics and Upper Bonai Group. Contact of Chhotanagpur Gneissic Complex with Chandil Formation is represented by a ENE-WSW striking linear tract of low gravity signals. Fig. 5 shows high analytic signals of magnetic anomaly over basic/ ultrabasic bodies mostly occurring in Chandil Formation, Dalma volcanics and Upper Bonai Group. Thus, gravity and magnetic surveys have picked up responses from some formational contacts and lithological units.

14 15 16 17

18 GEOPHYSICAL INVESTIGATION FOR GOLD IN VOLCANO-SEDIMENTS, VOLCANICS AND ASSOCIATED PLUTONIC ROCKS AROUND MAJHAULI- AJAYNAGAR-GHANSURA OF GAYA DISTRICT, BIHAR P. C. Das and Ajay Kumar Geophysical Investigation deploying Self Potential (SP) and Induced Polarisation (IP) cum Resistivity methods were carried out during FSP 2014-15 as per approved field season programme of Geological Survey of India, ER, Kolkata vide code No. ME/ /ER/BR/.2013/002, item No.041 for gold mineralization in volcano-sediments, volcanics and associated plutonic rocks in Majhauli-Ajaynagar and Ghansura areas, Gaya district, Bihar. The location of the survey area (Ajaynagar) is 24˚58’11”N to 24˚59’0.1” N and longitude 85˚17’48” E to 85˚18’49” E falling in toposheet No.72H/5. Geophysical Survey was conducted in Ajaynagar area and has been covered 61.12 Line Kilometers on a grid of 25m x 20m and 50m x 20m by Self Potential (SP) and Induced Polarisation (IP) cum Resistivity methods profiling along 47 traverses as shown in fig.1. The dipole-dipole array with both the current electrode and the potential electrode separations of 20m were utilized for IP cum Resistivity survey. Dipole-dipole array (Pseudo-section) with dipole separation (MN) of 20m & 40m with level n=1, 2, 3, 4, 5 was used for preparation of pseudo-section over the anomaly zones. The average elevation of the working area is 240 m above MSL. The most of the area lies under hilly terrain with occasional soil cover. The hill slopes, tops and valleys are covered with thick, luxurious thorny undergrowth. In this area, the volcano sedimentary sequence comprises differentiated volcanic rocks, rhyolite-andesite-pillow basalt, phyllite, mafic pyroclasts, tuff, chert-gabbro-pyroxenite, chert, quarzite and BIF of volcanic origin. The basic volcanic rock is characterised by a suit of pillow basalt and agglomerate. The IP profiles and the contour maps as obtained are utilised for identification of mineralised zones. The anomaly zone is lying in almost E-W direction in northern part of the working area. The IP brought out a couple of prominent anomaly zones (zone-I and zone-II) characterised by high chargeability of the order of 20-30mV/V in the north-western and north-eastern part of the area over the background of 6mV/V. The IP (chargeability) anomaly zones (I & II) are well corroborated by very feeble SP with moderate low resistivity signatures. These anomaly zones are clearly indicating the probable existence of sulphide mineralization in the study area as shown in fig 2. In north-western side of the surveyed area around 300 m wide zone (zone-I) of elongated anomaly is observed around station N600 from traverses W300 to E600. Another zone (zone-II) of 200 m wide anomaly has been noticed around station N640 from traverses E600 to E800 in north-eastern side. Anomaly zone –II is characterised by high IP (>30 mV/V) and the zone is associated with sharp SP and resistivity. The feeble chargeability anomaly zone observed over the tuffaceous phyllite / carbonatite implies that the zone is sheared/ faulted and bears medium volume of polarisable materials. This anomaly may also be attributed to the disseminated sulphide mineralization, and thus important from mineralization point of view. IP (chargeability) pseudo depth section along traverse No. W500 has indicated an anomaly zone at station N700. This zone is well corroborated by SP anomaly value of -50 mV near station N700 with moderately low resistivity value (Fig. 3). Beginning from surface, the contours of the anomaly is open downward which is suggestive of depth persistence of the causative source below n=5 level (i.e. >60m). The depth to the top of the causative body is estimated from the IP (TD) / Resistivity pseudo depth section is at about 15 – 20m from the surface.

ty ivi st

Resi

n=1

P.C. Das & Ajay Kumar FS:2014-15

20 6

4 4

6 4 4 4 4 4 8 1 10 2 6 14 8 2 6 6 4 12 14 10 8 16 4 8 6 6

8 4 6

6 4

4 2 4 8 6 2

21 SEISMIC HAZARD ASSESSMENT OF DARBHANGA URBAN AGGLOMERATION, DARBHANGA DISTRICT, BIHAR S.V.N. Chandrasekhar, Pushpita Bhaduri Geophysical surveys employing site response (SR) and resistivity methods were conducted in Darbhanga district, Bihar under “Seismic Hazard Assessment of Darbhanga Urban Agglomeration, Darbhanga district, Bihar” for FSP code 2014-15/SEI/ER/HQ/2014/001. The study area bounded by latitudes 26º 5’ N to 26º 12’N and longitudes 85º 52’ 20” E to 85º 57’ 20” E (Fig. 1). The present study area in Darbhanga district consists of Quaternary to recent alluvium made of clay, silt and sand. The litho units comprises Khajauli Member overlain by Jayanagar Member above which Kamla Member rests. The three litho units belong to Jayangar Formation of Holocene age. Darbhanga district lies near Indo-Nepal border region and as such belongs to extra peninsular India. The Indo-Nepal border region is seismically active. Two major earthquakes (1934 & 1988) of high magnitude occurred in this region in which Darbhanga was affected. Part of Darbhanga is falling in Zone IV and Zone V in Seismic Zonation Map of India. Three major subsurface faults e.g. East-Patna fault (EPF), West-Patna fault (WPF) and Munger- Saharsa Ridge Faults (MSRF) (Fig.2) running through Darbhanga district. As per the seismic history, the area is seismically active and vulnerable for earthquake risk. Hence GSI has taken up this area to study for Seismic Hazard Assessment. The geophysical surveys involve Site Response study and Resistivity survey. An area of 60 sq km has been taken up for Geophysical study. Site Response study conducted at 60 selected locations, Resistivity survey conducted at 43 locations. Nakamura technique has been applied for processing SR data, estimated Peak amplification factor (A˳) and corresponding Peak frequency (f˳) values (Fig. 3). Vulnerable zones were identified from f˳ & A˳ by calculating Vulnerability Index (K). In the study area the f˳ values ranges from 0.61 Hz (DB-04, Beladulla) to 1.24 Hz (DB-50, Garhiya), A˳ values ranges from 3.02 (DB-45, Chatiriya) to 4.91 (DB-19, Pandasarai). Resistivity survey has delineated a 4-5 layered earth model from the 1-d modeling.

Fig.1. Darbhanga district map

Fig.2 Seismic zonation map of Bihar.

Fig. 3 Seismic hazard assessment of Darbhanga urban agglomeration, Darbhanga district, Bihar.

24 GEOPHYSICAL MAPPING IN PARTS OF RAMGARH, RANCHI, HAZARIBAGH, CHATRA AND BOKARO DISTRICTS OF JHARKHAND Dr. P.N.Nagaraja, S.K. Roy and M. Ramesh Geophysical mapping employing gravity and magnetic (Total field) surveys have been carried out in SOI toposheet Nos. 73 E/1, 2, 5, 6 & 9 covering approximately about 3500 sq km area (with a station density of 1 station per 2.5 sq km area) and bounded by latitudes 230 30’ to 240 00’ N and Longitudes 850 00’ to 850 45’ E during the field season 2014-2015. This work was taken under National Geophysical Mapping programme of Geological Survey of India and aimed at identifying the regional geologic structures to characterize the subsurface features like faults / contacts. The gravity and magnetic anomalies have been explained by both qualitative and quantitative studies. The basin faults and other major lineaments in the region with various geological exposures in the study area have been correlated and inferences have been drawn regarding their subsurface disposition on the basis of quantitative analysis. The gravity map (Fig.1) can be divided into three major domains based on qualitative analysis, which are (i) Very high gravity zone marked as A in the south extending E-W direction from Bhurkunda to Thakurgoan representing the enclaves of unclassified metamorphics in to Granitic gneiss, (ii) low gravity marked as Zone B as Graben/ trough formed due to structural fault in between Khalari, Barkgoan and Laiyo area corroborating with the predominately exposed Gondwana Supergroup of rocks, iii) Another very high gravity zone in the northeastern part marked as C in between Hazaribagh, Churchu and Jhumra area is the faulted contact between Gondwana Supergroup and CGC rocks under soil representing the phyllite and mica schist. IGRF corrected magnetic anomalies (Fig.2) indicated high intensity magnetic anomalies (Zone B) trending in NW-SE to NE-SW direction with several bipolar magnetic anomalies are attributed to the presence of Lamphropyre and basic dykes within Gondwana supergroup of rocks. Low intensity magnetic anomalies (Zone A) are attributed to the Granite gneiss. Signal enhance methods have been utilized for quantitative as well as qualitative studies. Radially averaged power spectrum and Euler’s three dimensional analysis derived from Bouguer anomaly, high altitude total intensity magnetic data have indicated shallow interface depths of 2.7km to 3.5km for higher frequency gravity and magnetic anomalies where as longer wave length gravity and magnetic anomalies appear to be arising from depths of 5km to 6km. Analysis of Euler 3-dimensional convolution method and spectral studies of gravity and magnetic data indicated source depths varying between 1.5km to 4.0km along prominent gradient of gravity values at locations of the contact zones.

26 MANGANESE MICRONODULES OVER POLYCYSTINE RADIOLARIANS FROM CENTRAL ANDAMAN BASIN Sanjay Kumar Verma, Danish Anwar and Ashish Kumar Jha Sparsely distributed Manganese nascent micronodules / encrustations (Fig.1) observed over Radiolarian test in spade core (Core SR-002/SC-3, Core Length: 44cm, Water depth: 3139m) collected from Valley Margin of the Sewell (at depth interval between 4cm to 16cm bsf) from Central Andaman basin (CAB). It is important to note that these micronodules are recorded for the first time over Polycystine radiolarians from CAB, indicating the presence of dissolved metal compounds in the sea water. These metal compounds sinking through the water are precipitated over time around the test, which forms a nucleus over dead Radiolarian on the sea floor. With continuous precipitation the nascent micronodules starts to grow i.e. through hydrogenous process. The manganese nascent micronodules over radiolarian tests along with recovered microfaunal population and abundance of fecal pellets together confirms that the rate of sedimentation was very meager as well as the depositional environment was less dynamic, in comparison to cores collected from Central Andaman spreading axis and axis flank. It was further observed that the size of these nodules is very small, ~ 21µm average in diameter (Fig-1). However, nodules range in diameter from 20µm to 15cm (size less than 1mm considered as micronodule), which suggest that the very less resident time of these Mn-micronodules over the dead tests of radiolarian in the sediment. Further enlargement and better growth of these Mn-micronodules indicates that conducive environmental conditions must continue for a long time as size of Mn nodules increases in the order of millimeters in a million year. Hydrogenous nodules grow up to 10mm per million years, while diagenetic nodules grow between 10mm and 100mm in a million year. Though the SEM/EDX study does not provide the precise chemical composition of manganese nascent micronodules, still it indicates the presence of Mn rich mineral.

EDEX analysis point

Fig.1. Photomicrograph of Dictyocoryne trancatum A-without Mn micronodules, B-with Mn micronodules, C&D- SEM image showing Mn micronodules over Dictyocoryne trancatum, arrow showing EDX analysis point, spectrum showing- EDX analysis point result

27 INVESTIGATION FOR GOLD IN VOLCANO-SEDIMENTS, VOLCANICS AND ASSOCIATED PLUTONIC ROCKS AROUND MAJHAULI – AJAYNAGAR – GHANSURA AREA OF GAYA DISTRICT, BIHAR Dr. Mansoor Ahmad, Sr.Geologist Abdul Qayoom Paul, Geologist A total of 0.75 sq km has been mapped in 1:2000 scale and drilling of 750.95m has been completed. Only 36 numbers of core samples, all from borehole NB-01, have yielded low concentration of Au ranging from 50ppb to 170ppb Au values. Only one sample has yielded >70 ppb (170ppb) Au value. A 5.9m thick zone (43.40m to 49.30m) showed anomalous average Au value of 63ppb (n=13). In addition, four zones of 1.5m to 2.5m thick with average Au values of 57ppb to 59ppb and two zones of 1.0m thick with average Au values ranging from 53ppb to 55ppb have also been recorded. Detailed Mapping revealed that twenty four numbers of samples from Majhauli (n=20; 50-671ppb) and Ghansura (n=04; 50-100ppb) blocks have yielded anomalous Au values.

Detailed geological map of Majhauli – Ajaynagar – Ghansura area of Gaya district, Bihar

28 INVESTIGATION FOR GOLD IN NORTHERN BRECCIATED QUARTZITE-I AT LARGADIH AND LARGADIH EAST BLOCK, SARAIKELA- KHARSAWAN, DISTRICT, JHARKHAND Rajesh Kumar Gupta, Geologist A total of 529.55 m drilling has been completed. In Largadih area the gold is reported to occur in native form as well as associated with pyrite and arsenopyrite. Mineralisation in form of stringers and specks of sulphides (pyrite, arsenopyrite) with occasional suspected tiny gold specks are present in vein quartz within tuffaceous rock as seen in boreholes.

INVESTIGATION FOR GOLD IN SINDAURI- GHANSHYAMPUR BLOCK, RANCHI DISTRICT, JHARKHAND Pushpesh Narayan, Sr. Geologist Sushanta Layek, Geologist A total of 1001.30 m drilling has been completed. Incidences of gold have been found in almost all the litho units affected by shearing in form of specks, stringers, flakes, disseminations etc falling within the ENE-WSW trending wide (120m to 250m) shear zone. The sulfide minerals are aligned parallel to the foliation/ fractures as flakes and some are stretched parallel to the striations on foliation planes. The average width of the sulphide zone is 55 m.

SEARCH FOR POTENTIALITY OF TITANIUM, AND VANADIUM IN THE BAUXITE OF SERANGDAG PLATEAU IN GARNA-HANRUP-KABRAPAT-RISAHATTOLI- KURHETOLA AREA OF GUMLA DISTRICT, JHARKHAND (G-4) Snehalata Mukherjee, Geologist Abhilipsa Dash, Geologist An area of 51 sq. km. Aerial Reconnoitary Survey and 818.95 m. drilling have been done to assess titanium and vanadium potentiality in bauxite of Serangdag Plateau. Analytical results of borehole core samples ranges TiO2 (0.01-21.36%), V2O5 (0.01-0.44%) and Ga (07-109ppm). BRS samples ranges TiO2 (4.43-12.46%), V2O5 (<0.01-0.30) and Ga (55-107ppm). The above findings indicate surface continuation of mineralization persist at depth also.

EXPLORATION FOR IRON ORE IN KALAMANG WEST BLOCK (NORTHERN PART), SUNDARGARH DISTRICT, ODISHA Sabyasachi Dutta, Geologist G3 level of investigation through 1040.85 m. drilling and 5.0 sq km LSM (1:10,000 scale) have been undertaken to assess iron ore potentiality in the eastern continuous area of Ghorhaburhani and Sagasahi East blocks. Six boreholes have intersected the mineralised zone, thickness of which varies from 48.95 m to 94.10 m. The contiguous area towards north seems to be encouraging, due to presence of discontinuous NE-SW trending iron ore bands over a width of 600m.

29 EXPLORATION FOR IRON ORE IN GHORHABURHANI SOUTH BLOCK, SUNDARGARH DISTRICT, ODISHA (G3) Srikanth Doradla & Sabyasachi Dutta, Geologists A total of 1058.65 m. drilling and 1.51 sq km Geochemical Survey have been done to assess iron ore potentiality in the southern continuous area of Ghorhaburhani and Sagasahi block for augmentation of resource. Five boreholes have intersected the mineralised zone and its thickness varies from 14.00m to 76.00m. The different lithotypes exposed in the study area are ferruginous shale, Iron ore and laterite.

PRELIMINARY SEARCH FOR NI, CR & PGE GROUP OF ELEMENTS IN MAFIC - ULTRAMAFIC SUITE OF ROCKS IN PARTS OF BAGALIA- SONAIJURI- KASHIPUR- GOPALPUR SECTOR, T.S. 73I/11, PURULIA DISTRICT, WEST BENGAL. Debabrata Jena, Sr. Geologist, Sagarika Pattanayak, Geologist & Gargi Chakraborti, Geologist Large Scale Mapping in an area of 52 sq km (1:12,500 scale) and 30 cu m Pitting-Trenching have been done for preliminary search for Ni, Cr & PGE group of elements in mafic - ultramafic rocks and to decipher its relation with surrounding Chhotanagpur Gneissic Complex (CGC) rocks. The main rock types exposed in the study area are granite gneisses with the occasional enclaves of mafic granulites (?) and metabasic rocks. Emplaced within them in the form of lensoids / bands are some suites of pyroxenite- gabbro- gabbroic anorthosite sequences at several localities. Near Maguria Lalpur village pyroxenite, pegmatitic gabbro and anorthositic gabbro are exposed from west to east in the 281mRL hillock. The pyroxenite occurs mainly in the western margin of the hillock whereas in the eastern margin the rock could be of dioritic composition. At places, the pyroxenite shows some base metal sulphide disseminations. This hillock is intruded by a number of dolerite dykes. Higher anomaly of Sr in hornblende gabbro compared to normal gabbro indicates replacement of Ca by Sr in the former. The hornblende gabbro is also olivine normative and contains dissemination of sulphides in different phases. The higher wt. percentage of Sr in hornblende gabbro might be due to replacement of Ca in pyroxene by Sr during alteration to hornblende.

30 REGIONAL EXPLORATION FOR COAL IN RAJMAHAL - BIRBHUM COALFIELD, WEST BENGAL Shailendra Kumar Singh, S.Pradeep Kumar, Anita Kumari, Swapna Hazarika, Abha Urimal, Angelina Tirkey and Shreya Shrey Gazipur West Sector: A total of 1495.80m were drilled in four boreholes (BGZW-4, 5, & 6) which intersected Tertiary sedimentaries, Rajmahal Formation and Barakar Formation with maximum formational zone thickness of 275.60m, 214.65m and 183.19m respectively. One lignite seam having cumulative thickness 2.38m intersected at a depth of 251.11m and two Barakar coal seam zones (IV and III from top to bottom) with thickness of 0.63m to 1.30m (IV) and 1.96m to 1.97m (III) respectively intersected between 520.21m to 710.88m depths. Desorption study for two samples in borehole No. BGZW-4 was carried out and the desorbed gas ranges between 0.011cc/gm to 0.012cc/gm. Djara Area: A total of 2072.35m were drilled in four boreholes (BDJ-1, 2, 3 & 4) which intersected Tertiary sedimentaries, Rajmahal Formation, Barakar Formation and Talchir Formation (BDJ-1) with maximum formational zone thickness of 323.40m, 317.40m, 155.85m and 61.37m respectively. One lignite seam with cumulative thickness of 0.61m to 1.87m between the depth range of 95.39m to 162.01m and two Barakar coal seam zones (IV and III from top to bottom) having thickness 2.14m (IV) and 6.91m (III) between 663.38m to 787.86m depth have been intersected. Desorption study for five samples was carried out in borehole no. BDJ-2 and the desorbed gas ranges between 0.20cc/gm to 0.99cc/gm.

GONDWANA COAL IN MIRJAGAON AREA, HURA NORTHERN EXTENSION BLOCK, RAJMAHAL GROUP OF COAL FIELDS, BHAGALPUR DISTRICT, BIHAR Rabisankar Karmakar & Rakesh Deepankar, MIIB, E.R. The Rajmahal- Birbhum Coalfields consist of 6nos. of detached coal bearing sub-basins referred as Hura, Chupervita, Panchwara, Mahuagarhi, Brahmani and Birbhum coalfields from north to south. In most of the areas, the coal bearing Barakar Formation is overlain by the younger Rajmahal Trap, Palaeogene sediments and the further younger Quaternary sediments including the Gangetic Alluvium. Due to non-availability of high capacity drilling machine, the continuity of coal bearing horizon further northward of Hura North extension block could not be established earlier. The continuity of the major coal seams of the Hura Coalfield is recorded for the first time in the present state of Bihar at Mirjagaon area. In Mirjagaon area, a total of 2089.30m has been drilled in four boreholes (Fig.2) since commencement. Intersected cumulative coal seam thickness with thickest seam in each borehole and formational contact have been furnished below

31 RBMG-1 RBMG-2 RBMG-3 RBMG-4 Formational Contact Alluvium - Dubrajpur Fm 29.00m 25.70m 43.50m 4.40m

DubrajpurFm- Barakar Fm. 92.50m 92.50m 112.50m 95.45m Cumulative Coal 46.03m 63.69m 43.61m 43.80m Thickest Coal Seam 7.65m 10.40m 7.85m 6.15m Roof depth 220.00m 292.30m 367.90m 322.85m

Based on band by band proximate analysis of coal intersected in RBMG-1, four coal zones have been identified (Fig.3). Coal seam zone-A intersected between 432.80m to 463.35m depth. Coal seams of this zone yield non coking Grade F-G category coal with high ash content ranging from 34.6%-66.8%, while moisture content varies from 4.5%-8%. Zone-B intersected between 281.85m to 406.70m depth. Coal seams of this zone belongs to non coking grade C-G with ash content and moisture content vary from 16.5%-68.6% and 4.2%-14.8% respectively. Zone C intersected between 220.00m to 262.25m depth with ash and moisture content vary from 33.9%-64.5% and 6.2%-11% respectively. Coal seams of this zone are categorized under non coking grade F-G. Zone D intersected between 109.75m to 168.70m depth with coal seams of non coking grade F-G category. The ash and moisture content of coal seams vary from 27.5%-67.6% and 5.8%-11.3% respectively. Petrographic study reveals that rank wise, the coal of this area can be categorized under Lignito-Bituminous to Sub-Bituminous. From the data accrued so far, a tentative Geological resource of coal of about 1000 million tonne has been estimated from the Mirjagaon area.

Fig.1: Geological map of Mirjagaon area, Bhagalpur district, Bihar

32 MIRJAGAON AREA RAJMAHAL COALFIELDS RBMG-1 RBMG-2 RBMG-3 RBMG-4 Started: 27.11.13 Started: 15.1.14 Stated 20.08.14 0m Quartenary Started: 28.07.14 Quartenary 29.00m Quartenary 25.70m Quarternary 50m Dubrajpur 43.50m 71.70m Dubrajpur Rajmahal 92.50m 84.00m 100m Barakar 89.00m Rajmahal 95.45m 109.75m 4.55m Barakar 127.80m 0.70m 112.50m Barakar 133.95m 2.13m Barakar 150m 166.90m 2.80m 157.80m 1.00m 172.10m 1.50m 220.00m 189.05m 192.35m 1.35m 200m 7.65m 202.75m 2.20m 242.40m 231.80m 4.50m 217.95m 1.65m 5.40m 241.89m 0.80m 220.75m 0.90m 250m 261.00m 259.20m 1.20m 243.94m 1.96m 244.65m 3.05m 1.00m 261.65m 281.85m 0.90m 292.30m 1.25m 265.40m 0.90m 10.40m 277.40m 4.30m 300m 298.70m 2.35m 302.70m 293.15m 4.90m 4.60m 308.20m 4.10m 322.25m 3.85m 317.20m 333.70m 2.00m 299.35m 2.25m 336.15m 2.05m 322.85m 349.35m 6.50m 347.10m 2.10m 343.35m 0.90m 6.15m 350m 0.95m 343.35m 0.50m 366.45m 1.35m 367.80m 360.90m 7.85m 345.85m 0.50m 381.90m 2.10m 353.45m 1.40m 400.35m 0.77m 394.60m 0.70m 363.30m 0.75m 400m 405.80m 0.90m 395.80m 6.70m 368.55m 0.65m 432.80m 3.60m 422.30m 1.30m 402.25m 1.50m 440.85m 2.55m 434.40m 1.45m 428.15m 1.70m 441.07m 2.48m 430.50m 2.65m 434.05m 1.00m 450m 455.00m 441.95m 0.90m 441.65m 1.75m 462.90m 0.45m 2.35m 448.42m 1.20m 459.45m 2.80m 5.45m 474.00m METAMORPHICS 474.90m 485.95m 0.70m 501.00m 1.40m 495.85m 6.10m 500m 487.00m 514.95m 7.35m 507.80m 0.50m 522.10m 1.00m 516.75m 1.25m B.H. closed on (25-06-2014) 531.00m 2.35m 535.10m 1.75m 550m 549.85m 3.80m 567.87m 0.89m 558.90m 1.90m 549.20m 560.80m (Continuing) 600m 583.40m (continuing) B.H. close on (04-08-2014) 650m

700m I N D E X Quaternary 750m Rajmahal Fm. Dubrajpur Fm. 800m . Barakar Fm. 850m Coal

900m Metamorphics

Fig.2: Graphic litholog showing coal seam intersected in boreholes of Mirjagaon area, Bhagalpur district, Bihar

Fig.3: Panel diagram showing coal seam zone correlation, Mirjagaon area, Bhagalpur district, Bihar

34 PRELIMINARY EXPLORATION FOR COAL BY SCOUT DRILLING AROUND GAURANGAPUR–BANKATI AREA TOWARDS EAST OF BISTUPUR-DANDESWAR SECTOR, RANIGANJ COALFIELD, BARDDHAMAN DISTRICT, WEST BENGAL. A.R.Ekka & Shivangi Kumari, Geologists. Preliminary exploration for coal by scout drilling for a cumulative depth of 2,560.70m in five boreholes has been completed in the block. Four regional Raniganj coal seam zones viz. R-IX, R-VIII, R-VII & R-Basal (in ascending order) have been intersected with cumulative coal thickness varying from 0.50m to 18.51m within the depth range 199.78m to 689.55m. The thickness of the individual seam generally varies from 0.50m to 3.95m. In addition, a 1.85m thick lignite seam has also been intersected at a depth of 147.60m.

GRAPHIC LITHOLOGS OF BOREHOLES, DRILLED IN GAURANGAPUR- BANKATI AREA

35 CHARACTERIZATION AND GENESIS OF CLAY DEPOSITS IN TERTIARY SEDIMENTS OF BIRBHUM COALFIELD, BIRBHUM DISTRICT, WEST BENGAL Subhransu Sanyal, Swapna Hazarika In Patelnagar quarry area, a 50m thick clay deposit is observed and studied. The section consists of almost horizontal beds of white clay, which are locally interbanded with silty layers. Particularly the clay horizon comprises small tubular vertical bodies (often spiral) made up mostly of pyrite crystals, which are embedded at about 30m depth. Above this pyrite rich clayey zone, silty to fine sandy beds exhibit parallel lamination and small scale high angle crude cross lamination. In the boreholes of BHK-4 and BHK-5 at Heruka sector, white homogenous to interbanded clay bands ranging in thickness from 1m to 30m were intersected between 9m to 180m depth range above the basaltic Rajmahal trap. The thickness of the clay beds decreases towards the top. In Heruka sector the subsurface information shows that sufficiently pure clay bands occur even at 150m depth directly above the Rajmahal trap without any adjacent granite body. The rocks are very fine grained, highly altered and represented mainly by clay minerals with minor quartz and zeolite minerals. Texturally the grain size of the rock is bimodal in nature. The larger grains are represented by quartz, opaques and zeolite minerals, set in a groundmass of ferruginous and clayey minerals. Some altered and elongated large grains show isotropy/feeble anisotropy and both ends show curved nature. These features together suggest that the grains may be altered glass shards. The pyritiferous tubes consists of both euhedral and colloform pyrite crystals, of which the euhedral grains show sector zoning in 4-, 5- and 6-sided grains. So far EPMA study carried out for the clay samples shows the composition of the clay minerals, more akin to kaolinite. EPMA analysis of the zoned pyrite of tubular mass is “nickelian pyrite" and shows that the darker parts are enriched in Ni with respect to the brighter part with corresponding decrease in Fe. Raman Spectroscopic Study shows that the outer matt around the pyrite crystals contains a mixture of minerals occurring in two layers. In the outer layer bordering pyrite, an intermixed zone of marcasite and goethite occurs, while towards outer layer (surface), an assemblage of kaolinite and martite dominates. The clay beds as observed are bereft of any intercalation of sandstone-siltstone as found typically in fluvial origin. In the eastern side of the study area borehole logs indicate that the clay beds occur directly above the Rajmahal trap without any adjacent granite body. Hence, residual origin of this clay can also be ruled out. Moreover, the field and petrographic results obtained hints about the volcanic/pyroclastic origin of such clay horizon.

Photo 1: Clay (white, kaolinitic) quarry at Patelnagar, Photo 2: Thick horizontally bedded clay at Patelnagar Birbhum district Quarry, Birbhum district

Photo 3: Tubular Pyrites restricted at some Clay Beds at Photo 4: Slag layers capped by soil exposed at Patelnagar Quarry, Birbhum Mathurapahari quarry

Photo 5: Fossil wood (Tree trunk) associated with Photo 6: Quartz grains of clay showing blocky to pebbles and clasts of chert, vein quartz, granitic rocks prismatic shape. etc. in conglomeratic unit

37 PETROLOGICAL STUDIES OF THE CLAY HORIZONS IN TERTIARY SEDIMENTS OF BIRBHUM COALFIELD, BIRBHUM DISTRICT, WEST BENGAL Subhransu Sanyal, Swapna Hazarika Geological study has been carried out in parts of TS Nos. 72P/12, 16 and 73M/9. Emphasis was given on study of subsurface borehole (BH BDJ – 1, 2, 3, 14 and BGZW – 5 and 6), surface exposures and quarry sections. In addition, clay exposures at Raghunathpur and Raipur (TS 72P/12) and Adda- Kharighata-Majhipara (TS 73M/9) have been studied. Apart from these, study of clay quarries at Salbona, Sursal, Chaubatta, Piyasala and Bargachhia (TS 72P/12) and Patelnagar (73M/9) has also been undertaken. Claystones are mined for industrial purposes in the area mainly from the Patelnagar and Bargachhia open cast mines. Sporadic outcrops of clay are also seen in pits, dug well cutting and ponds. A plethora of clay bands of different colour and mineralogy were intercepted in all the boreholes, viz. red, white, grey/mottled, purple etc. The Tertiary clay has no contact with the CGC and Rajmahal Trap in the study area. In the boreholes, five (5) to twenty seven (27) claystone bands have been intersected. Thickness of lithopackage of claystone bands increases towards northwest (down dip direction). As expected, compaction of claystones of variable thickness increases towards the bottom part of each borehole. Lithological correlation of claystone bands is difficult due to absence of marker horizon. As evident from the lithologs, the Tertiary sediments rest over the uneven base of Rajmahal Trap always with a nonconformable contact which is often marked by red clay zone known as red/ green bole. The clays are often stained - yellow (limonitic) and brown (goethitic). Mineralogically, clay is composed dominantly of crystalline kaolinite and good amount of quartz. Lateral variations within these claystone beds pose a major problem in their correlation. The rocks are very fine grained, highly altered and represented mainly by clay minerals with minor quartz. Thin section study of clay is very difficult. Hence, binocular microscopic studies, preparation of pellets, SEM – EDX studies, EPMA studies and studies of heavy minerals under the microscope are the useful tools. Binocular microscopic studies reveal ferruginous encrustations and presence of ferruginous veinlets in white and green clay, which indicates effects of oxidation. SEM studies reveal shapes of quartz and clay grains to be angular and subangular, which indicates a proximal provenance. EPMA, SEM – EDX and heavy mineral studies revealed presence of staurolite, zircon, tourmaline, garnet, chromite etc., which may all have been derived from metamorphic sources. XRD and DTA – TGA data suggests presence of kaolinite and quartz as major phases and anatase, rutile, haematite, mica, K-feldpar, plagioclase, calcite, pyrite, rhodochrosite, siderite, goethite and halite as traces. XRF data, when plotted in Discriminant Function Diagram, suggests that the claystones have primarily been derived from mafic igneous and quartzose sedimentary provenance. CIA, CIW and ICV values of majority of clay samples indicate very high intensity of palaeo-weathering and alteration, which is supported by absence of authigenic feldspar. Geotechnical analyses of 20 clay cores reveal that the clay found in the Gazipur sector is of very low specific gravity compared to clay of moderate specific gravity found in Djara sector. LL/PL (Liquid Limit / Plastic Limit) of selected claystones are in plastic range. Grain size analyses indicate that the claystones are silty and sandy in nature. The clay deposits are definitely of sedimentary origin. These have been derived from dual sources, i.e. from Rajmahal Traps as well as from Chhotanagpur Gneissic Complex (CGC). Presence of lignite and pyrite towards top part of the succession indicates prevalence of euxinic condition with intermittent oxidising environments, as evident from limonitic and ferruginous encrustations. On the other hand, presence of halite at the bottom part indicates dewatering of basin.

Photo 1: Generalised view of Piyasala quarry (TS Photo 2: Quaternary – Tertiary unconformity 72P/12) exposed in Piyasala Quarry (TS 72P/12)

Photo 3: Gently northerly dipping claystones in Photo 4: Clay exposure at Kharighata-Majhipara, Piyasala Quarry (TS 72P/12) near Adda (TS 73M/9)

Photo 6: Contact between brick red (bottom) and Photo 5: Generalised view of cores of Tertiaries white (top) claystones in Patelnagar Quarry (TS containing claystone in BH BDJ-4 (TS 73M/9) 73M/9)

39 CHARACTERISATION AND PETROGENESIS OF PLUTONIC AND VOLCANIC ROCKS IN MUNGER GROUP AROUND RAJGIR AND GAYA, BIHAR Swapna Hazarika, Subhransu Sanyal Litho-structural studies involving traverse mapping and collection of samples were carried out in TS Nos. 72H/1, 5, and 9 in parts of Gaya, Nalanda and Nawada districts, Bihar in two spells of fieldwork. Geomorphologically, the study area is a peneplained country with inselbergs/monadnocks of plutonic rocks. Two prominent mobile belts are exposed in the area, viz. Rajgir Metasedimentary/Fold Belt (RFB) and Bathani Metavolcanic Province (BMP). The area represents an ensemble of various types of rocks, ranging from plutonic, volcanic, clastic, chemogenic, and low – grade metasedimentary rocks. In all places, exposures in the form of inselbergs represent nature of CGC, i.e. miniature of geological complex having more than variegated rocks. In the T. S. No. 72H/1, granitoids were found as inselbergs in and around Patharkatti, Keni Pahar, Gere, Kapildhara, Vishnupad Temple, and Ramshila areas. Granitoids are leucocratic to mesocratic, and fine– to medium–grained, massive, and highly jointed. Quartz, plagioclase and biotite are the major constituting minerals. In Patharkatti, granitoids were studied which comprise different phases of granitic bodies, viz. porphyritic granite with lath shaped feldspar phenocrysts (2–3cm), coarse grained granite with subrounded phenocrysts, and very fine grained grey mafic rocks. These are associated with fine grained mafic rocks (dolerite?). At Gere, granitic rocks were studied in a rock quarry section which are leucrocratic (light pinkish), medium grained, and hard. Exposures of rhyolite in association with basalts had been observed in and around Lodhipur area in a quarry section. In the southern part of the study area, low – grade metamorphic rocks comprising quartzite and phyllite forming hills trending NNE – SSW and N – S were studied. Near Bhojpur, gneissic granite was observed which clearly shows folded S1 and S2 schistocity. Pegmatitic veins traversing the exposures of gneissic granite were also seen to be folded. Near Gandhar, milky white sheared and foliated quartzite with 3 – 4 sets of joints was studied. The quartzite exposures are highly weathered with brick red stains on surface and also burnt at places. Magnetite veins within dolerite dykes are hosted by anorthosite near Lachchhu Bigha. In the TS No. 72 H/5, the entire area is covered by Rajgir fold belt which is composed of quartzite and phyllite. The overall strike of Bathani Metavolcanic Province is NE – SW. Near Mahadev Bigha (∆196), pillow basalt exposures with chilled margin, ladder veins of quartz, vesicles, and quartz boudins were studied. All these features together indicate polyphase deformation. In Bathani area massive light grey medium grained granites are observed. In the northwestern part small granitic rocky knobs were studied which are massive in nature. In the Tilasin Hill different variants of granitic bodies were found, which include medium grained light grey granite, coarse grained feldspathic granite, gneiss, and fine grained non porphyritic dark grey granite. Sheared/gneissic granite has been observed near Rasulpur. Petrographic studies of coarse grained granite (Sample no BGL-7) from Patharkatti (72H/1) shows presence of K-feldspar, plagioclase, and hornblende as major minerals and apatite, zircon, and sphene as accessory minerals. Granite sample (BGL-8) from Keni Pahar (72H/1) with mafic enclaves has also been studied under the microscope. The rock is rich in K-feldspar, plagioclase, biotite and quartz. Epidote, apatite and zircon are the accessory minerals. Twinning and kinking of K-feldspar is noted, which indicate effect of ductile deformation, although in field the rock appears to be undeformed.

XRF results of 16 samples show variance of SiO2 from 47% in basic rocks to 77% in acidic rocks. Highly anomalous values of Ba (up to 1560ppm) have been noted in some samples of granite.

Photo 1 : Xenoliths within granite at Keni pahar Photo 2: Small scale folding in granite at Gere

Photo 3: Sheared granite of Kapildhara area Photo 4: Sheared plane of quartzite in Gandhar area

Photo 5: Magnetite veins in anorthosite at Lachchhu Bigha Photo 6: Pillowed metabasalt in Mahadev Bigha area, area Bathani Metavolcanic Province

41 CHARACTERIZATION OF LAMPROITES AND ASSOCIATED INTRUSIVES OF WEST BOKARO COALFIELD, WEST BENGAL AND JHARKHAND. Sudip Bhattacharya, Suptdg Geologist, Dr. Abhijit Roy, Geologist Field studies were carried out in West Bokaro Coalfield, Bokaro district, Jharkhand in the year 2013-14. The only exposures of lamprophyre dyke are found at Dhudi Nala and Choutha Nala area within the Talchir and Barren Measure formation of Gondwana sedimentary unit. At Dudhi Nala (23°49′14.8″ N; 85°27′12.5″ E ; T.S. No. 73 E/5) about 22m long dyke is exposed as vertical body within the course of Dhudi Nala flowing from west to east following the general slope of the entire Bokaro coalfield. The width of the dyke is about 60–65cm, trending N 30° W – S 30° E and dipping 8° – 10° easterly with a height of 3m vertically. Central portion of this dyke body is susceptible to weathering, relatively soft, light, coarse grained, dark greenish to khanki grey coloured having width of about 15–20cm containing mica and chlorites. Whereas both the margins are dark grey coloured, relatively compact, hard and fine grained and having less visible mica but containing small detrital quartz clasts [which is not found in central portion]. At Choutha Nala (23°45′24.6″ N; 85°32′05.3″ E ; T.S. No. 73 E/9) about 35m long brownish grey to fleshy coloured ultramafic dyke has been exposed in the course of Choutha Nala trending NW – SE following the similar trend of the dyke exposed at Dudhi Nala. It has been intruded vertically within homoclinal, gently & easterly dipping interbedded sequence of carbonaceous shale and siltstone along with occasional ironstone shale of Barren Measure of Lower Gondwana.

Fig 1 (a): Lamprophyre dyke at Dudhi Nala, West Fig 1 (a): Lamprophyre dyke at Choutha Nala, Bokaro coal field. West Bokaro coal field.

Fig 1 (c): Lamprophyre dykes cutting across grey Fig 1 (d): Lamprophyre dykes at Choutha Nala, shell sandstone sequence of Barren Measure West Bokaro coal field. Formation at Choutha Nala, West Bokaro coal field.

42 Petrographicaly, the rocks showing panidiomorphic texture with predominance of phlogopite phenocryst. The ground mass is composed mainly of poikilitic laths of phlogopite, pyroxene, carbonate with ilmenite, pyrite, rutile as accessory mineral. All the mineral phases have been affected by post crystallization changes in varying degree – both carbonation and silicification. Mineral chemistry of phlogopite phenocryst showing MgO 12.06 % – 20.61 %; FeO 7.31% – 18.09%; TiO2 4.3% -7.29%. Clinopyroxenes are mostly ferrosillite showing composition as Feo 28.5 % - 30.04 %; CaO 0.82% –2.36 %; MgO 0.45% – 0.63 %. The ultramafic dykes of West Bokaro coal field may shows close affinity to lamprophyric suite of rock (alkali minette) on the basis of mineral chemistry mentioned above, rather than lamproite suite due to absence of characteristic mineral phases of lamproite such as xenocrystic, megacrystic and macrocrysic olivine, Al-Ca poor diopside and tetraferriphlogopite

CHARACTERIZATION OF LAMPROITES AND ASSOCIATED INTRUSIVES OF RANIGANJ COALFIELD, WEST BENGAL AND JHARKHAND. Dr Mandakini Maharana, & Resmi R. C, Geologists Geological study was carried out in and around Raniganj coalfield, including Toposheet 73 I/14 and TS 73M/2. In Raniganj coal filed, surface exposure of these dykes are rare and restricted at the quarry faces of open cast as well as underground coal mines. These intrusive are found as dyke and sills (Fig-1 a- d) cutting across and parallel to the Gondwana sediments with a trend NW to SE and the sill follows the trend of the bedding. The sills resemble like a patch of different rock within the heterolithic sediments of Gondwana. The dykes are weathered, greyish to whitish grey in colour, fine to medium grained, compact, heavy, mica are more prominent. Light green colour mineral seen in the hand specimen as serpentinised olivine. Lots of pyrite veins seen as accessory phases along with the coal bodies. The dyke found at underground coal mines/collieries i.e Ramnagora, Mithani, Dhemumain, Patmohania, Chinnakuri, Narsamunda, Rajpura, Khudia and Bdjana were showing similar characteristic as that of the surface one like weathered surface, chilled margin and altered primary phases.

Fig 1(a): Overview of Ramanagore colliery, multistory Fig 1(b): Crosscutting relationship of Lamproite dykes unit of sandstone, shale intruded by lamproite dyke, within the sedimentary unit, Ramnagore colliery, Raniganj Coal field. Raniganj Coal field.

Fig 1 (c) Lamproite sill within the Gondwana sedimentary Fig 1(d) Lamprophyre dykes showing chilling effect, at Ramnagore colliery, Raniganj Coal field. reduction of grain size towards margin at Ramnagore colliery, Raniganj Coal field.

Petrography and mineral chemistry provides the primary phases identified as phenocryst (Fo ~ 78-88%), and xenocryst (Fo ~ 92%) of olivine, pseudomorphed olivine (olivine which is altered to carbonate retaining the original shape), megacryst and macrocryst of phlogopite (TiO2 2.47%−10.64 % ; Al2O3 8.2 % - 15.15%), Na poor diopside (Na2O < 1%), carbonates both rich in Ca and Mg. The accessory phases identified as apatite, rutile, ilmenite, quartz, pyrite and few grains of magnetite etc. Overall texture of the rock is panidiomporphic, i.e, all the minerals having equant shape with sharp boundary indicating the volatile rich magma phases. Xenocrystic olivine reveals deeper mantle source of parent magma. The phlogopite dominating in all the rocks, displaying a reaction rim textures like zoning (intermittent change of titanium from core to rim). From the petrography supported by mineral chemistry discussed above, the dykes of Raniganj Coalfield may be categorized as lamproite suite of rocks.

Fig.1: Photomicrograph showing small laths of phlogopite Fig.2: Photomicrographs of phenoctystic olivine showing battlemantle texture in Lamproite from Khudia surrounded by small laths of phlogopite in colliaries, Raniganj coalfield. Lamproite from Khudia colliaries, Raniganj coalfield.

Fig.3: Photomicrograph showing zoned Phlogopite Fig.4: Photomicrograph showing Phlogopite, laths of phenocrysts in Lamproite from Barakar river, Chungadi apatite in Lamproitee from Barakar river, chungadi village, Raniganj coalfield. village, Raniganj coalfield.

PETROLOGICAL CHARACTERIZATION AND GENESIS OF IRONSTONE OF BARREN MEASURES OF RANIGANJ AND WEST BOKARO COALFIELD Dr Mandakini Maharana, & Resmi R. C, Geologists Field study was taken up around Raniganj coalfield parts of toposheet Nos.73M/I and 73I/14 in Birbhum and Bardhaman district. Field traverses were taken in and around Asansol , Kulti, Begunia, Dishelgarh, Parbeliya, Hijuli, Ranipur, Gopalpur, Kalyasata and Narayanpur area in parts of toposheet Nos. 73 I/14, where the rocks of Barren Measures are exposed. Field traverses taken in Bhabaniganj, Sira, Nabasan, Jamalpur, Binui, Bheleni, Tamra, Barkola, Parshundih, Paharpur, Arang, Jamalpur, Samuldih, Darbar danga, Birkulti, Madhudanga, Moldanga, Nayakapur Jamgram, Narayanpur, Churulia, Darbar danga, Birkulti, Madhudanga, area in parts of TS Nos. 73M/1. Ironstone bands of thickness 2cm to 15cm were observed in between the sandstone and shale units. They are hard, compact and very fine grained. Field traverse was carried out at Barakar river section to study the characteristics of Ironstone in Barren Measure formation. Thick shale and thin siltstone and sandstone units observed trending NW dipping 4° towards SE.

Fig 1A. Grey shale, ironstone and siltstone band Fig 1B: Ironstone bands overlain and underlain exposed in the left bank of Barakar River, near by grey shale in the left bank of Barakar river, Chungadi village. near Bella Chawk.

Photo. 1C. Grey shale and ironstone bands in the left Photo. 1D. Ironstone exposed near Bella Chawk, left bank of Barakar River, near Narayan Chawk. bank of Ajay river (73I/14)

Photo. 1G. Ironstone capping near Paharpur village Photo 1H: Ironstone band and sandstone exposed Parshundhi village

Petrographic study of ironstone is very difficult unlike other rocks as these are very fine grained and soft in nature. The XRD analyses show that there are three types of ironstone bands - haematite rich, siderite rich and goethite rich (Annex – I). In haematite rich ironstone samples, haematite is in good amount besides small amounts of goethite, ankerite, siderite and kaolinite are present. A small amount of lepidocrocite is detected in one of the haematitic rich sample. In siderite rich ironstone samples, siderite is the major mineral present besides considerable amounts of goethite, ankerite, and quartz and some minor phases of apatite and dolomite are present. In goethite rich ironstone samples, goethite is present in considerable amount besides small amounts of ankerite, apatite, siderite, dolomite and quartz. Therefore, the XRD analysis clearly shows that distinctive mineralogy of haematitic, sideritic and goethitic ironstone bands occurring within the alternations of siltstone and shale beds.

46 OCCURRENCE OF ARCHIPELAGO GROUP IN NORTH ANDAMAN ISLAND Tarun Koley and Anju C S Archipelago Group of rocks are extensively developed in the Ritchie’s Archipelago i.e., group of Islands situated in the Andaman Sea towards east of Main Andaman islands. There are some other islands viz. Interview, Tarmugli, Parrot Islands located in the Bay of Bengal along west of main Andaman Islands where Archipelago Group of rocks are also reported. Besides, rocks of Archipelago Group are exposed as a 60-80m thick, N-S trending linear band from Hobdaypur to Jhirkatang, South Andaman Island. Its extension in North Andaman Island was not known earlier. Field investigation revealed about 10m thick sequence of tuff – shale –claystone alternation (attitude 340° with 50°E dip) near Mohanpur [12°56'14": 92°50'16"], North Andaman Island. This sequence is sandwiched between very fine grained sandstone -shale alternations and is equivalent to the tuff – shale – siltstone sequence exposed in Hobdeypur, Jhirkatang and Miletilek, South Andaman Island. Laboratory study of the North Andaman samples has noted radiolarian presence in abundance having Cenosphaera sp., Actinomma sp., Cyclampteriurn (?) neatum, Acrosphaera spinosa, Heliodiscus asteriscus, Carpocanopsis cristata, Stylochlamydium asteriscus and Cinclopyramis sp. Similar assemblage has been reported from similar sediments of Neil and Havelock Islands. The North Andaman samples are devoid of calcareous planktonic microfossils whereas in South Andaman, rich assemblages of planktonic foraminifers comprising Globigerinoides spp, Globoquadrina spp and Globoratalia spp are found related to radiolaria. In Mohanpur, presence of siliceous radiolarian fauna without calcareous counterpart indicates that either the sediments were deposited below CCD or interaction of acidic environment during or after the deposition which dissolved calcareous tests.

Diglipur

Mohanpur

Fig. 1: Location map of the study area in North Andaman Fig 2: Tuff-Claystone sequence exposed in Mohanpur, Island North Andaman

49 DPR STAGE GEOTECHNICAL INVESTIGATION OF PROPOSED WATER SUPPLY SCHEME ON RELLI RIVER, KALIMPONG, DARJEELING DISTRICT, WEST BENGAL Debasish Bhattacharya & N.R.Bhattacharjee, Superintending Geologists Kalimpong Municipality has proposed to construct an intake on Relli River to lift the water through two pipelines with intermediate reservoirs and finally store it in a water treatment plant of 4 MGD (million gallons per day) capacity near Puja Dara. About 1000m lifting of water has been proposed through 15km long pipelines by project authorities. Geological traverse mapping revealed that the alignment is not feasible due to unsuitable location of intake and presence of unstable slide debris along the proposed alignment or very steep slope. Moreover, there were a number of kinks along the alignment which will reduce the efficiency of lifting. Therefore, an alternative alignment has been selected by shifting the location of intake towards upstream by about 1.5km and a stable slope for laying the pipelines. Geological mapping (on 1:2000 scale) along the pipeline alignment reveals that along the present alignment, phyllites and phyllitic quartzite of Daling Group is either exposed or present under consolidated overburden comprising soil and boulder. Moreover, consideration for three intermediate reservoirs instead of proposed two have been suggested to increase the overall efficiency of the pumping operation. In this new alignment proposed by GSI, the length of the pipeline is reduced to 2.8km which was earlier proposed for about 15km as the intake has been taken about 1.5km (approx.) upstream of the earlier proposed site. The drastic reduction of length of pipelines will not only increase the efficiency of pumping but also reduce the cost of the project substantially. Moreover, the topmost storage reservoir was shifted in a stable ground to keep the foundation on rock. At this location the elevation is 50m higher than the originally proposed one, keeping the lifting height (1000m) same. This will increase the efficiency of distribution. However, the proposed well intake could not be feasible in rocky river bed both in the present and the originally proposed locations. As the river bed consists of boulders and pebbles including numerous large boulders, there are chances of damaging the structure due to rolling of huge boulders in rainy season because of the high gradient of the river. Therefore, a trench weir has been proposed by GSI instead of a well structure.

Alternate pipeline alignment along rocky spur suggested by GSI

50 DPR STAGE GEOTECHNICAL INVESTIGATION OF KOSI-MECHI LINK PROJECT, SUPAUL, ARARIA AND KISHANGANJ DISTRICTS, BIHAR Debasish Bhattacharya & J. Mukherjee, Superintending Geologists 117km long Kosi-Mechi Intra-state link project of National Water Development Agency (NWDA) envisages diversion of part of available surplus water of Kosi River basin to Mahananda River basin. The area under study is characterized by flat terrain exhibiting very gentle slope from north to south and drained by a number of meandering rivers like Parman, Bakra, Kankai, Ratua etc. The overall drainage pattern is dendritic in nature. The area is covered by present day deposits containing fine sand, silt and clay along the course of rivers and their tributaries. This is underlain by alternate bands of sand and silty clay (polycyclic unoxidised lentisol) of Kosi-Ganga Formation followed by Purnea Formation comprising feebly oxidized, brownish silt, sand, sandy silt or clayey sand and finally underlain by oxidized brownish yellow silty clay with caliche constituting the Hazipur Formation. Ground water occurs at shallow depth ranging from 2-4m bgl during post monsoon time to 4-4.8m bgl during pre monsoon period. Proposed sites for fourteen cross drainage (CD) structures have been geologically/geotechnically assessed and sub-surface explorations through drill holes along with water percolation test have been suggested. Some of the CD structures have been proposed obliquely with the river course which will result in increase in length of the concrete structure and cost thereof. Moreover, many sites for the proposed CD structures have been selected at the curvature/meander of the river course which requires sufficient slope protective measures to prevent bank erosion. Therefore, efforts may be made to locate the structures perpendicular to the river flow and to avoid the meandering stretches as far as possible.

Prominent bank erosion on right bank of Kosi River near outfall point

51 POST CONSTRUCTION STAGE GEOTECHNICAL INVESTIGATION OF RINCHINGTON MICRO-HYDEL PROJECT, DARJEELING DISTRICT, WEST BENGAL Debasish Bhattacharya & J. Mukherjee, Superintending Geologists Rinchington Microhydel Scheme in Darjeeling District, West Bengal, comprises 9.144m long trench weir across Rinchington River, a 2956m long flume channel, a 107m long, 10m wide and 15m deep forebay tank, a surface penstock of 741m length and 5.33m diameter has been constructed to feed the two turbines of surface powerhouse to generate 2MW of power. The terrain belongs to Darjeeling Gneiss of Pre-Cambrian age. The project authorities are facing slope instability problems in some particular stretches of the flume channel. During this investigation, traverse was taken along the entire flume path and in and around the forebay area for detailed assessment of the visible distresses as reported by the project authority. Appreciable subsidence and seepage, development of subsidence cracks, presence of old slide zones and associated slope distresses have been identified in some selective stretches of the flume channel. A series of contour trench drains filled up with filter material, benches/berms and retaining walls have been suggested to prevent migration of finer particles through subsurface flow to control the shinking/subsidence in old slide zones. In the rock slide zones, retaining walls, shotcrete, rock bolts etc. have been suggested for retention/reinforcement of the slope to impart stability.

Flume path, presently guided on BP sheet, to negotiate seepage and subsidence zone.

53 SELECTION OF BOOKS & JOURNALS FOR EASTERN REGION LIBRARY BY THE EXPERT COMMITTEE

The Book & Journal selection committee of the Eastern Region Library met on 5th November 2014 to select suitable books & journals, keeping in view the growing demands of officers engaged both in base level data generation and research oriented projects. Different publication houses of national and international repute were contacted to supply books for the library. Besides the core members of the expert committee, different domain experts, in general and field going officers, in particular were actively participated in the selection process with elan and enthusiasm to choose books and manuals of their choice. A plethora of books and journals starting from hardcore geology to applied subjects like climate change, Geospatial technology, Socio-environmental studies, Referral Atlases & Compendiums etc. were made available by the suppliers to fulfill the demands of geoscientists working in various fields. The Dy. Director General & HOD, ER has also shown his keen interest and selected some journals and books for the library. The recommended books and journals will be made available for the readers very soon after the completion of the procurement modalities.

Officers of Eastern Region are engrossed in selecting books & Journals for the library

54 GEOLOGICAL SURVEY OF INDIA REGIONAL TRAINING INSTITUTE, EASTERN REGION, KOLKATA Report on ‘Special course on principles and practices in Engineering Geology for officers of GSI held from 21.07.2014 to 30.07.2014 at Kolkata/Purulia/Jamshedpur The Regional Training Institute, Geological Survey of India conducted a training programme entitled ‘Special course on principle and practices in Engineering Geology for officers of GSI’. Trainees were selected from the nominations received, given priority to the officers who are associated with Engineering Geolgy projects or likely to be posted in Engineering Geology Division. Altogether 20 trainees from Eastern Region, North Eastern Region, Western Region and Southern Regions of GSI attended the training programme.. The lecture part of the training was held at P. K. Banerjee Hall of M&CSD (erstwhile Marine Wing). The training programme was inaugurated on 21st July, 2014 by Shri K. Balasubhramanian, Dy. Director General & HOD, ER and Chairman for the session in the presence of Shri A. H. Chaurasia, DDG & RMH-IV and Chief Guest for the session, Shri Prasanta Mishra, Director, Engineering Geology Division & Course Cocordinator, Md. Aminul Islam, Director & Core faculty & Course cordinator, RTI-ER, Dr. S. R. Basir, Supdtg. Geologist & Core faculty RTI- ER, Kolkata and others including a host of faculties. Dr. S. R. Basir, Suptdg. Geologist and Core faculty RTI-ER welcomed the dignitaries and the participants from different regions of the GSI.

Shri K. Balasubhramanian, Dy. Director General & HOD, ER. addressing the gathering Md. Aminul Islam, Director & Core faculty, RTI-ER presented the course overview and emphasised that the course included all the basic concepts and practices in Engineering Geology and aim and objective of the training is to enhance the capacity and capabilities of the participants. He added that GSI is the only organisation recognised at National and International

55 level as far as Engineering Geology is concerned and the knowledge acquired by the participants would be of immense use in all the projects of Geotechnical Investigation of GSI in future. The DDG & HOD, ER in his inaugural speech emphasised on the importance of this training in the backdrop of acute shortage of expert Engineering Geologist in recent time in GSI. He also conveyed his good wishes to the trainees. Shri A. H. Chaurasia, DDG & RMH-IV advised the trainee officers to take the training seriously so that they can take up projects independently in future. The training module was divided into three parts. First and major part was the lecture series by guest faculties drawn both from serving officers of GSI and also from retired officers of GSI who have expertise in this field. The course covered theoretical and conceptual aspects regarding fundamentals and essentials in Engineering Geology. The second part was dedicated to Laboratory practices in Geotechnical Lab of ER, GSI and the third component was field visit in geotechnical investigations of water resources projects. The trainees were taken to different construction stage projects in Jamshedpur, Jharkhand and in Bagmundi, Purulia, West Bengal. The trainees were also taken to the Purulia Pump storage Project, Bagmundi, Purulia, West Bengal which is presently operational and GSI was actively associated in Geotechnical investigation during its construction and installation stage. The Chief Engineer of the project Shri Surajit Chakroborty vividly explained and shown the different surface and underground components of the project i.e., upper & lower dams, spillways, underground powerhouse cavern, transformer hall, main access tunnel etc.

Purulia Pump Storage Project Lower reservoir He also explained different surface and underground treatments for stability of these structures. Prior to that Shri Chakroborty explained all the project details with the help of power point presentation in the project office. The project is owned by West Bengal State Electricity Distribution Company Limited (WBSEDCL). On the second day, the trainees were taken to a proposed site for Turga Pumped Storage Project, where GSI is presently engaged in DPR stage geotechnical investigation. The trainees were explained the concepts and considerations on the

56 basis of which dam axis, intake area, powerhouse location, HRT and TRT alignments, types of dam, quarry site for borrow area etc. are selected and the importance of large scale geological mapping in such case. In the post lunch session, they were taken to proposed lower dam of TPSP and were explained the adequacy and inadequacies of the existing minor irrigation dam in serving the purpose and requirements for the desired lower dam of TPSP. They were also given a practical demonstration on geotechnical assessment of slope and its stability in the light of SMR, RMR and Q values. The trainees were also given a practical demonstration on drill core logging in the PPSP office, how to fix the bedrock and fresh rock level, RQD, structural parameters like joints and foliation, identifications of fracture and shear zones, preparation of summary of borehole logs etc.

Faculties and trainees in front of Purulia Pump Storage Project Upper Reservoir On this day the trainees were shown the Satnala Project, West Singhbhum District, Jharkhand where GSI is associated in the ongoing construction stage geotechnical investigation of an earth dam. They were explained different aspects of geological mapping of COT, foundation treatment, sub-surface exploration of dam and spillway foundation, type of dam and spillway in this kind of geological setup. Finally they were taken to Ganjia village near Saraikela, Jharkhand where GSI presently is associated with the construction stage geotechnical investigation of barrage on Kharkai river-a tributary of Subarnarekha River and were explained the site selection criteria of such project- geology of the area, orientation of barrage axis, presence of bends/meanders in the stream and its effect on the project, nature of sub-surface explorations in this kind of projects and shown some of the drill hole logs in order to match the assessment of bedrock level and fresh rock level with that of the excavated blocks etc.

57 On 30st July the valediction session was chaired by Shri K. Balasubhramanian, Dy. Director General & HOD, ER. He congratulated all the trainees for successful completion of the training. The chief guest for the session was Shri M. Raju, DDG & NMH-IVA. Other dignitaries who graced the occasion were Shri Prasanta Mishra, Director, E.G. Division, Md. Aminul Islam, Director & Core faculty, Dr. S. R. Basir, Supdtg. Geologist & Core faculty, RTI-ER, Kolkata and others including a host of faculties.

Course Report on ‘Workshop on use of Hindi in day to day official work for Group ‘C’ Ministerial Staff of GSI’ (29.10.2014 to 31.10.2014) at Kolkata

A workshop on Hindi entitled ‘Workshop on use of Hindi in day to day official work for Group ‘C’ Ministerial Staff of GSI’ was conducted by the Regional Training Institute (RTI), Eastern Region during the period from 29th to 31st October, 2014 at Bhu-Bijnan Bhawan, ER, Salt Lake, Kolkata. The training course is the scheduled programme of Mission-V of RTI, ER (FSP code No: WS-HINDI/ER/RTI/2014/011, item No. 104) of F.S. 2014-15. The course was inaugurated by Shri K. Balasubramanian, Dy. Director General & HoD, Eastern Region and in the presence of Shri B. Das, Director, PSS, Eastern Region.

Mr. R. P. Choudhury, Director (Drilling), GSI, ER interacting with the participants Twenty five officials, three each from ERHQ, Drilling Division, ER, SU: Bihar, CHQ & OPEC-I, M&CSD; two each from SU:WBAN, SU:Odisha & SU:Jharkhand and four officials from M-IIB, GSI, have attended the workshop. In the inauguration ceremony, Dr. S.R. Basir, Suptdg. Geologist and core faculty, RTI, ER welcomed the dignitaries on the dais and requested Ms. Sahana Choudhury, Junior Translator, M-IIB, GSI to conduct the proceedings in Hindi. Shri Md. Aminul Islam, Director, RTI welcomed all the participants and briefed about the course module. He narrated the significance of such workshop. This was followed by a brief introduction of the participants. In his address, Shri K. Balasubramanian, Dy. Director General & HoD, Eastern Region and Chairman of the session briefly described the importance of the workshop on use of Hindi in day to day official work and expected that the participants would use Hindi more frequently in their day to day routine and official work. He appreciated the

58 course schedule and said that the workshop will provide basic knowledge and understanding of the use of Hindi in their daily official work. He requested all the participants to have active interaction with all the facilitators of the workshop. Shri B. Das, Director, PSS, ER requested all the participants to utilise this opportunity to the best of their capabilities. He expected that the participants would be immensely benefitted from such workshop. The course had been conducted with the help of faculty members from ERHQ, M&CSD and M-IIB of GSI. The various topics covered during the three days deliberations are summarised in Annexure-II. Apart from these, Group discussion and interactive session were also organised.

Mr. Md. Aminul Islam, Director RTI, GSI, ER delivering lecture In their feedback, participants had stated that the course was maturely conceived as well as systematically and effectively executed. They had mentioned that the course will be very much useful and helpful during their daily official work. They had also appreciated the interaction with the faculty members during the entire period of the workshop. Most of the officials requested to increase the duration of the course and some have expressed that this type of training may be conducted in every year. They rated the training as excellent. The participants were provided the course material in the form of softcopy. In the valedictory function, Shri K. Balasubramanian, Dy. Director General & HoD, Eastern Region had interacted with the participants and expressed his feelings from the feedback of the participants. He advised the officials to utilise the knowledge thus gathered to the best possible extent. He advised the Director, RTI, ER to explore the possibility towards increase the duration of the course.

Mr. K. Balasubramanian, DDG and HoD, GSI, ER awarding certificate to the participant Shri Md. Aminul Islam, Director, RTI, ER congratulated the participants for successful completion of the workshop and appreciated the enthusiasm as well interaction and interest showed by them. He also hoped that the participants are better equipped with knowledge on use of Hindi in their daily official work and are in more comfortable position to use Hindi more frequently in their official work. Certificates were awarded to the participants by Shri K. Balasubramanian, DDG & HoD, ER. The valedictory function had come to an end with the vote of thanks proposed by Shri Md. Aminul Islam.

Report on ‘Advance course in exploration for PGE for officers of GSI, DGMs and other’ organisations held from 24.03.2014 to 29.03.2014 at Bhubaneswar/ Jajpur/Sukinda.

The Regional Training Institute, Geological Survey of India, Eastern Region, Kolkata conducted a week long training programme on ‘Advance course in exploration for PGE for officers of GSI, DGMs and other organisations’. A total 15 nominations have been received out of which 3 nominations were from DGM, Jharkhand and rest were from GSI. The training programme was divided into two parts. First part was lecture series and second part was dedicated to field work including visits to different mines in and around Sukinda. The lecture part of the training was held at Blanford Hall, SU: Odisha, Bhubaneswar. Though the training programme was originally scheduled to be held at Bhadrak, the venue has to be changed due to non availability of suitable infrastructure like lecture hall in the hotels at Sukinda / Bhadrak /Jajpur. On 24th and 25th, lectures were held and the valediction ceremony including the lecture was held on 29.03.2014 at SU: Odisha, Bhubaneswar. On 24th, the training programme was inaugurated by Shri B. M. Beeriah, Dy. Director General, SU: Odisha, in the presence of Md. Aminul Islam, Director & Core faculty, Dr. S. R. Basir, Supdtg. Geologist & Core faculty RTI- ER, Kolkata, Shri P. K. Jena, Senior Geologist, SU: Odisha, Dr. J. K. Nanda, Dy. Director General (Retd.) and others. The guest faculties are specialist in their own field and most of them

60 are National Geoscience awardees. Their performances in the field as well as in class room lectures are highly praise worthy. The inaugural function was followed by a day long lecture on Precambrian geology of the North Odisha - Singhbhum province with special reference to economic mineral deposits by Dr. J. K. Nanda, Dy. Director General (Retd). Field trip was carried out to different working chromite mines around Sukinda accompanied by Shri R. N. Patra, Dy. Director General and HOD (Retd), Shri K. C. Sahoo, Director P.G.R.S. Division, ER and Md. Aminul Islam, Director RTI-ER, Kolkata. On the second day i.e. 25th March, Shri R. N. Patra, Dy. Director General (Retd) delivered highly meaningful and informative lecture on Exploration techniques for PGE with special reference to global perspective and practices. He mesmerised the trainees by his lecture and all the trainees enjoyed his company in the field. Other lecturers for the day were by Shri B. M. Beeriah, Dy. Director General, SU: Odisha and Shri K. C. Sahoo, Director, ERHQ. On 26th, trainee officers were taken to Tata chromite open cast mine and Orissa Mining Corporation open cast mines. On 27th, regional traverse was taken around Baula Nausahi Ultramafic complex. On both the days i.e., 26th and 27th, Shri Priyadarhi Sahoo, Supdtg. Geologist & Faculty, FTC- Sukinda also accompanied the trainees to different locations of geological interest. His pre-visit interaction with the mining authority and arrangements made for the mine visit proved highly beneficial to the trainees. On 28th, the trainees were taken to Bangur underground chromite mine. They were shown the mining operation at 30m level. On the surface, different exposures of ultramafic rocks were studied in details. On the same day, the trainees left Jajpur and arrived at Bhubaneswar. On 29th, lecture on UNFC classification was delivered by Shri P.K. Jena. Senior Geologist. SU: Odisha in the first half and valediction ceremony was held in the second half. Shri S. C. Rath, Director General (Retd) graced the valediction function. In his speech, Shri Rath emphasised on the need of this type of training and distributed the certificates to the trainees. The training programme was aimed at imparting latest knowledge and exploration techniques to the officers of GSI, DGMs and other organisations engaged in exploration activities. In order to provide up to date knowledge and latest techniques and procedures for PGE explorations, eminent scientists both working and retired officers of GSI were invited as guest faculty. All the lectures have been highly meaningful and informative and will prove to be useful for their future work. In the inaugural session Shri B. M. Beeriah, Dy. Director General, SU: Odisha, Eastern Region emphasized on arranging such training programmes to up-to-date knowledge among those dealing with exploration work. Md. Aminul Islam, Director & Core faculty, Regional Training Institute, GSI, ER, Kolkata introduced the course content of the workshop.

Sheath fold at Bangur mine Trainees studying Igneous Breccia at OMC Mine

View of Tata Chromite mine

Igneous Breccia and chromite load at Bangur Faculties and trainees at Hathgarh Dam

62 A REPORT ON OBSERVANCE OF ‘VIGILANCE AWARENESS WEEK’ IN GSI, ER In compliance of Central Vigilance Commission’s (CVC) order, the Vigilance Section, Eastern Region, Geological Survey of India has organised the ‘Observance of Vigilance Awareness Week’ 2014 from 27th October to 1st November, 2014. The week was commenced by pledge taking ceremony at 11:00 am, Shri E. Ramalingam, Deputy Director General RMH-II, GSI, ER administered the pledge in English and Md. Aminul Islam, Director & V.O., E.R. in Hindi to all the officers and staff of the region. Next day i.e., on 28th October, a debate competition on the subject ‘Combating Corruption-technology as an enabler’ was held in which officers and staff of the region overwhelmingly took part. Most of the participants spoke in favour of the motion while a few talked against the topic. The debate generated keen interest among the audience and judges too. On 31st October, a lecture series on vigilance matter was held in which several speakers presented their views on vigilance. Shri Gautam Bhattacharya, CVO, GSI, in spite of his busy schedule spared his valuable time and delivered a short speech on vigilance matter. He also covered India’s position as per Corruption perception Index (CPI) in addition to various aspects of vigilance.

Shri Md. Aminul Islam, Director & V.O., ER administering the pledge in Hindi Shri Sujit Kumar Ghosh, IPS and former DG (HG) & Jt. Director, CBI graced the occasion as chief guest. He shared his vast experience as Police Officer and also as CBI officer with the audience. He invited few questions after his speech from the audience which later proved a never ending phenomenon as there was no end of questions from the audience and ultimately the organiser has to draw an end keeping in mind the time constraint. Shri K. Balasubramanian, Deputy Director General & HoD, ER delivered lecture on vigilance matter and advised the officials to be aware of the rules and regulations of vigilance so that they can avoid vigilance web. All the speakers while addressing the gathering emphasised in good governance as corruption in any form not only impedes growth and development of an organisation, it also seriously erodes efficiency and credibility of the organisation. Shri Balasubramanian, distributed

63 prizes to the participants of the debate competition. The session came to an end with a vote of thanks proposed by Md. Aminul Islam..

Shri Sujit Kumar Ghosh, IPS and former DG (HG) & Jt. Director, CBI and Chief Guest

Interaction with the chief guest, Shri Sujit Kumar Ghosh, IPS and former DG (HG) & Jt. Director, CBI

64 CHEMICAL DIVISION 1. Status of equipments/ instruments in procurement pipeline in 2014 S. No Description Status 1 Fuming Chambers : 05 nos.+ 1 scrubber Delivered & awaiting for installation 2 Upgradation of AA400 instrument – 01no. Materials required under transit. 3 Water purifier system (Millipore), MillQ-10 - Delivered & awaiting for 01no. installation 4 AAS & GTA -01 no. TAC concluded. 5 WD-XRF instrument -01no. Under tendering process. 6 UV-Visible Spectrophotometer -01 no. Under TAC. 7 Analytical Balance -02 nos. Under TAC.

2. Status of NGCM sample analysis ERO, chemical division has completed analysis of 17118 no of samples for 201369 no. of determinations under various analytical packages viz. A, B, C, D, E, F, G, H & J during the year 2014. 3. Status of non-NGCM (STM, ME, RP, REE & PGE) sample analysis ERO, Chemical Division has analysed 13185 no. of non-NGCM samples for determination of 68248 no. of radicals during the year 2014. 4. Organisation of OCC/workshop/seminar ERO, Chemical division has successfully conducted Training programme on “Refresher Training Course on Analysis of Water Samples” under RTI, ER, GSI for Sr. Chemists/ Chemists/ STAs (Chemical) from 4th June to 13th June, 2014. 5. Participation of chemists in training Shri Debasis Banerjee, Sr.Chemist and Shri Mrutyunjay Moharana, Sr. Chemist attended training programme on “Geological Reference Material and Geochemical Analysis” from 18th August to 22nd August 2014 held at PPOD Division (NCEGR), GSI, SR, Bengaluru. 6. Publication of scientific paper Shri Anirban Sur, Sr. Chemist, Shri Debasis Banerjee , Sr. Chemist and Shri Sudip Mandal, JTA (Chemical) published a paper entitled ‘Application of X-ray Fluorescence Spectrometry to the estimation of major and minor constituent elements in dolomite, limestone and dolomitic limestone’ in ‘Indian Journal of Geosciences’, volume 68, No.1 January – March, 2014; pp. 45-56. 7. Participation of chemists in field duty: Shri Bhagirathi Behera, Chemist and Shri Pradeep Kr. Bandopadhyay, Chemist from Chemical Division , ER, Kolkata participated in field programme along with Geologists in connection with NGCM water sample collection and analysis for NGCM programme of Operation West Bengal.

Analysis being done by XRF instrument Inauguration of the training programme on Refresher course on water sample analysis (2)

ICPMS Instrument used for the determination of Rare Distribution of certificates in the training programme Earth Elements at Ultra Trace level on Refresher course on water sample analysis

Analysis of Water-determination of conductivity Analysis of Water - determination of total hardness

Analysis of Water - fluoride determination

66 8. H.R. ISSUES SUPERANNUATION Sl. No. NAME DESGN. DATE 1 Shri Ashok Mathur Dy. Director General (Chemistry) 30.09.2014 2 Dr.(Mrs.) Banani Banerjee Senior Chemist 30.09.2014 3 Shri Shovaban Gowda MTS 31.08.2014

PROMOTIONS Sl No. NAME DESGN.(From) DESGN. (To) DATE 1 Shri F. Kharsshing Director Dy. Director General 31.10.2014 (Chemistry ) 2 Smt. Tapasi Bhatacharya Asst. Chemist Gr I Chemist 21.07.2014 3 Shri Biswajit Paul Lab.Asstt. Gr.II Lab.Asstt. Gr.I 03.07.2014

TRANSFERS Sl. No. NAME DESGN. FROM TO DATE 1 Shri F. Kharsshing Directot NER, Shilong ER, Kolkata 28.07.2014 2 Shri F. Kharsshing Dy.Director ER, Kolkata CCL, CHQ 31.10.2014 General (Chemistry ) 3 Dr. S.K.Sharma Dy.Director WR, Jaipur ER, Kolkata 01.12.2014 General (Chemistry ) 4 Dr. P.K.Trivedi Sr. Chemist WR, Jaipur ER, Kolkata 13.08.2014 5 Dr.Chandrima Roy Sr. Chemist ER, Kolkata SR, Chennai 30.06.2014 6 Shri A. K. Singh Chemist ER, Kolkata CR, Pune 02.03.2014

6. OFFICERS AND TECHNICAL STAFF POSITION AS ON 31.12.2014 Group Name of the Post Filled up Position A Dy.Director General ( Chemistry ) 1 Senior Chemist 2 Chemist 13 B Asst. Chemist 0 STA 2 JTA 8 C Lab Asst. Gr. I 2 Lab Asst. Gr. II 0 Lab Asst. Gr III 10

67 68

SIGNING OF MEMORANDUM OF UNDERSTANDING BETWEEN NATIONAL WATER DEVELOPMENT AGENCY (NWDA) AND GEOLOGICAL SURVEY OF INDIA (GSI), EASTERN REGION A Memorandum of Understanding (MoU) was signed on 3rd December, 2014 between National Water Development Agency (NWDA) and Geological Survey of India (GSI) on “Consultancy work for geological investigation for survey & investigations, preparation of feasibility report of Manas-Sankosh-Tista-Ganga river link project (alternate alignment from Manas river to Tista river)” at GSI, Eastern Region, Kolkata. The MoU was signed by Mr. K. Balasubramanian, Dy. Director General & HOD, Geological Survey of India, Eastern Region, Kolkata and Mr. B.L. Sharma, Superintending Engineer, NWDA in the presence of senior officers from GSI consisting of Mr B. Das, Director, PSS Division, Mr Prasanta Mishra, Director, and Dr. T. B. Ghoshal, Superintending Geologist, Engineering Geology Division of GSI, Eastern Region. The NWDA delegation included Mr. B.L. Sharma, Mr. R. P. Ahirwar and Mr. S.C. Parui of Investigation Circle, NWDA, Bhubaneswar.

Mr. K. Balasubramanian , Dy. Director General & HOD, Geological Survey of India, Eastern Region and Mr. B.L. Sharma, Superintending Engineer, NWDA exchanging the document The Manas-Sankosh-Tista-Ganga (M-S-T-G) link Canal Project is one of the major river linking projects under Himalayan rivers development component of the National Perspective Plans (NPP). The main purpose of this canal project is to divert the surplus water of Manas River, a tributary of Brahmaputra to Tista River and finally to Ganga for augmenting the flows of Ganga at Farakka to meet the growing demands of Ganga Basin and to protect Kolkata Port for salinity control in Sundarbans as well as transfer of surplus water to the southern rivers of peninsular India viz. Mahanadi to Kaveri. The objective of the MOU is to provide geological and geotechnical consultancy to the project authority for preparation of Detailed Project Report (DPR) of this river linking project. GSI will study the feasibility of the project on geological and geotechnical consideration and will suggest modifications, if required. In this process GSI will help

NWDA to finalize the location of various appurtenant structures of the project and their tentative foundation conditions. GSI will also propose suitable remedial measures to improve the foundation condition of various structures like barrage, canal and cross drainage structures.

From L to R: S/Shri S.C. Parui, R.P.Ahirwar, B.L. Sharma, K. Balasubramanian, B.Das, P. Mishra, T.B. Ghoshal

71 Independence Day celebration in GSI, Eastern Region

The Independence Day 2014 was celebrated at Bhu-Bijnan Bhavan, Eastern Region Hqrs, GSI, Kolkata. Shri K Balasubramanian, the Deputy Director General and HoD, ER hoisted the Tricolour National flag and deliv-ered a talk on ‘sacrifice of freedom fighters to achieve the independence of the country’ – ‘the progress India made in different fields from the inception of freedom’ and ‘the progress made by GSI’. In addition, he narrated the future road map of GSI and the scope of GSI work in Andaman & Nicobar Islands based on his recent field visit to A & N Islands.

72 73 THE GREAT EARTHQUAKE OF ASSAM 12TH JUNE 1897

74 BIHAR & NEPAL EARTHQUAKE 1934

75 BIHAR & NEPAL EARTHQUAKE 1988

भारतीय भवैज्ञानिकूू ेक्षणेसव के पवीूू क्षेत्र, समद्रीुु एवं तटीय सवेक्षणे तथा प्राकृृ नतक ऊ셍ाा संसाधि 饍वारा सम्ममलित 셂प से 12 लसतंबर 2014 से 19 लसतंबर 2014 तक हहंदी सप्ताह 2014 का आयो셍ि ककया गया। इस समारोह का उ饍घाटि श्री के . बािासब्रमनियणुु , उप महानिदेशक एवं ववभागाध्यक्ष, पवूू ी क्षेत्र 饍वारा 12 लसतंबर 2014 को ककया गया। इस हदि भारत के गहृृ मंत्री एवं महानिदेशक, भारतीय भवैज्ञानिकूू क्षेेसव ण के संदेश भी पढ़कर िाएुुस गए। उप महानिदेशक एवं ववभागाध्यक्ष, पवीूू क्षेत्र िे रा셍भाषा हहंदी की मह配ता पर प्रकाश डािा एवं अपिे अधधकाररयⴂ एवं कमाचाररयⴂ से हहंदी मᴂ अधधकाधधक काया करिे के साथ ही साथ हहंदी सप्ताह समारोह को सफि बिािे के लिए अिरोधुु ककया। मंचासीि उपम्थथत अन्य सभी उपमहानिदेशकⴂ िे भी रा셍भाषा हहंदी की प्रगनत एवं इसके प्रचार- प्रसार पर अपिे-अपिे ववचार प्रकट ककए। उक्त अवधध के दौराि निमिलिखितुु कि छ: (06) प्रनतयोधगताएँ यथा श्रुनतु िेिि एवं कववता पाठ प्रनतयोधगता (15.9.2014), निबंध एवं वाद-वववाद प्रनतयोधगता (16.9.2014) तथा गायि एवं प्रश्िो配तरी प्रनतयोधगता (18.9.2014) आयोम्셍त की गℂ एवं उपरोक्त प्रनतयोधगताओं मᴂ कुु ि िगभग 150 प्रनतभाधगयⴂ िे भाग लिया। अधधकाररयⴂ एवं कमाचाररयⴂ िे परेूू मिोयोग से सहभाधगता कर इस कायाक्रम को सफि बिािे का प्रयास ककया। “हहंदी सप्ताह समोराह 2014” का समापि हदिांक 25 लसतंबर को आयोम्셍त ककया गया। इस अवसर पर कायाक्रम के अध्यक्ष के 셂प मᴂ श्री के . बािासब्रमनियणुु , उप महानिदेशक एवं ववभागाध्यक्ष,पवीूू क्षेत्र, एवं साथ ही श्री एम. हरर प्रसाद, उप महानिदेशक, समद्रीुु एवं तटीय ेक्षणेसव प्रभाग एवं श्री पी. के., पा셂ई निदेशक, प्राकृृ नतक ऊ셍ाा संसाधि प्रभाग उपम्थथत थे। सवाप्रथम श्री के . बािासब्रुु मनियण, उप महानिदेशक एवं ववभागाध्यक्ष, श्री एम. हरर प्रसाद, उप महानिदेशक, समद्रीुु एवं तटीय ेक्षणेसव प्रभाग एवं श्री पी. के., पा셂ई निदेशक, प्राकृृ नतक ऊ셍ाा संसाधि प्रभाग का मंच पर पष्पुु -ग楍छुु से थवागत ककया गया। उसके पश्चात ्् श्री अवधेशुु कमार लसंह, रसायिज्ञ एवं रा셍भाषा अधधकारी, पवीूू क्षेत्र 饍वारा थवागत भाषण हदया गया। तदोपरांतश्री सुु साहािा चौधुरी,ु कनिष्ठ अिवादक,ुु प्राकृृ नतक ऊ셍ाा संसाधि 饍वारा हहंदी सप्ताह समारोह, 2014 का संक्षक्षप्त वववरण प्रथततुु ककया गया। इ स के पश्चात ्् सभामंच पर उपम्थथत महोदयगण 饍वारा प्र配येक प्रनतयोधगताओं मᴂ प्रथम, 饍ववतीयतीय एवंतृृ थथाि प्राप्त प्रनतभाधगयⴂ कोरथकार पुु ववतररत ककए गए एवं अन्य प्रनतभाधगयⴂ को प्रो配साहि हेतुु प्रनतभागी परथकारुु प्रदाि ककए गए। त配पश्चात ्् कनिष्ठ हहंदी अिवादकुु 饍वारा वावषाक वववरण प्रथततुु ककया गया एवं रा셍भाषा से संबंधधत यो셍िाओं की सचिाूू दी गई। मख्युु अनतधथ महोदय िे प्रनतभाधगयⴂ को अपिी बधाई देतेुुए ह सरकारी काम-का셍 मᴂ रा셍भाषा हहंदी के अधधकाधधक प्रयोग पर बि हदया और 煍यादातर काया हहंदी मᴂ करिे की सिाह दी म्셍ससे रा셍भाषा ववभाग 饍वारा निधााररत िक्ष्यⴂ को समय परणा पूू ककया 셍ा सके। उप महानिदेशक महोदय िे इस कायाक्रम को सफि एवं उ配साहवधाक कायाक्रम बताया तथा साथ ही “ हहंदी सप्ताह समारोह, 2014 ” के सफि आयो셍ि हेत ुु बधाई दी।

“हहंदी सप्ताह, 2014” के उ饍घाटि के अवसर पर श्री के . बािासब्रुु मनियण, उप महानिदेशक एवं ववभागाध्यक्ष,पवूू ी क्षेत्र का पष्पगुु 楍छुु से थवागत ।

उ饍घाटि के अवसर पर श्री अवधेशुु कमार लसंह, रा셍भाषा अधधकारी अपिा वक्तव्य रितेुुए ह ।

समापि सह पुरथकारु ववतरण समारोह के अवसर पर उपम्थथत अधधकारी एवं कमाचारी न्द।वृृ

समापि सह पुरथकारु ववतरण समारोह के अवसर पर मंचथथ अधधकारीगणⴂ के साथ हहंदी से 셍ुड़ेु अधधकारी एवं कमाचारीगण।

79 “हहंदी सप्ताह, 2014” के दौराि श्रुनतिेिि प्रनतयोधगता मᴂ भाग िेते “हहंदी सप्ताह, 2014” के अंतगात निबंध िेिि प्रनतयोधगता मᴂ भाग प्रनतभागीगण।्् िेते प्रनतभागीगण।

ग़ायि प्रनतयोधगता मᴂ अपिी गाि प्रथतुनतु देते हुुए प्रनतयोगी “हहंदी सप्ताह, 2014” के द ौ र ा ि प्रश्िो配तरी प्रनतयोधगता की

परथकारुु प्रदाि परथकारुु प्रदाि

Eastern Region has been First among the other regions in the XXXI All India GSI Drama Competition (AIGSIDC) held at Scientific Hall, Laxmi Nagar, Nagpur on 19th & 20th February, 2015 was hosted by Geological Survey of India, Central Region, Nagpur. The Bengali drama - ‘TOBUO SOKAL’ staged by Eastern Region, Kolkata has become 1st among the other six regions. The theme was about the fight against the social disease of making the noble medical profession a tool to gather money for earthly desires and using non-sacrosanct ideas for heeling up the diseases. In addition to First Prize, GSI, ER has also won First Best actor (Suman Ghosh), Second Best actor (Avijit Kumar Kunda), First best actress (Sanhita Sengupta- (Dutta). The drama group consists of:- Script Writer: Sivankar Chakraborty Director: Suman Ghosh Technical Director: Pankaj Sil Manager: Madan Prasad Cast: Dr. Mukherjee: Avijit Kr. Kunda Mrinmoy: Suman Ghosh Gokul: Swapan Sardar Dr. Dutta: Pranab Dutta Atashi: Smt. Sanhita Sengupta (Dutta)

Stills from ‘TOBUO SOKAL’ drama-

G 81

Mr. Suman Ghosh receiving the award of Best Actor

Mr. Avijit Kumar Kunda receiving the award of Second Best Actor

G 82

Mrs. Sanhita Sengupta (Dutta) receiving the award of Best Actress.

Award of Best Production

G 83

ADMINISTRATION

PROMOTION, TRANSFER, RETIREMENT ETC. OF GROUP ‘A’ & ‘B’ (GAZETTED) OFFICERS FOR THE PERIOD FROM 01.01.2014 TO 31.12.2014

PROMOTION (Source of Data:- GSI Portal)

Sl. Name & Designation From To Order/Joining No. Date 1 Shri M. Hari Prasad Director (Geology) Dy. Director General 21-05-2014 2 Shri D. K. Saha Director (Geophysics) Dy. Director General 26-02-2014 3 Smt. Tripti Roychoudhury Director (Geology) Dy. Director General 24-12-2014 4 Shri Biswabandhu Das Director (Geology) Dy. Director General 24-12-2014 5 Shri S. B. Ray Director (Geology) Dy. Director General 24-09-2014 6 Shri Niraj Jaiswal Senior Geologist Supdtg. Geologist 01-04-2014 7 Shri Arvind Kumar Senior Geologist Supdtg. Geologist 01-04-2014 8 Shri Assian Barla Senior Geologist Supdtg. Geologist 01-04-2014 9 Shri Prasun Ghosh Senior Geologist Supdtg. Geologist 01-04-2014 10 Shri Jaydip Mukherjee Senior Geologist Supdtg. Geologist 01-04-2014 11 Shri Sandeep Bardhan Senior Geologist Supdtg. Geologist 30-04-2014 12 Shri S. K. Biswas Senior Geophysicist Supdtg. Geophysicist 17-04-2014 (A/N) 13 Shri Dinesh Kumar Rai Director (Geology) Dy. Director General 02-06-2014 14 Dr. Nabendu Majumdar Geophysicist Senior Geophysicist 24-09-2014 (A/N) 15 Smt. Gita Gupta Geophysicist Senior Geophysicist 24-09-2014 (A/N) 16 Shri Biswanath Dewanji Assistant Executive Executive Engineer 07-02-2014 (A/N) Engineer 17 Shri Tapan Kumar Roy Assistant Executive Executive Engineer 19-09-2014 Engineer 18 Shri Partho Bhattacharya, Assistant Executive Executive Engineer 19-09-2014 Engineer 19 Shri Dilip Sikder Assistant Engineer Assistant Executive 11-07-2014 Engineer 20 Shri Jaydeb De Assistant Engineer Assistant Executive 10-07-2014 Engineer 21 Shri Sunanda Kr. Jena Assistant Engineer Assistant Executive 10-07-2014 Engineer

TRANSFER (Source of Data: GSI Portal)

Sl. Name & Designation From To T.O. Charge No. 1 Shri N. R. Mohapatra SU: Bihar, STSS, CHQ, 01-04-2014 Director (G) ER, Patna Kolkata 2 Shri Debashis Saha, ER, Kolkata Regional Mission- 01-04-2014 Director (Geology) III, ER, Kolkata

84 3 Shri Azizul Hussain, Director SU: Odisha, ER, Kolkata 01-04-2014 (Geology) ER, Bhubaneshwar 4 Shri Shyama Prasad Bhutia SU: Odisha SU: Assam, 01-05-2014 Senior Geologist ER, Bhubaneswar NER, Guwahati 5 Smt. Sarita Tirkey, SU: UP, SU: Jharkhand, 01-05-2014 Geologist NR, Lucknow ER, Ranchi 6 Shri Arun Kumar Kujur SU: UP, SU, Jharkhand, 01-05-2014 Geologist NR, Lucknow ER, Ranchi 7 Smt. Resmi Sathikumar SU: UP, M&CSD, 01-05-2014 Geologist NR, Lucknow ER, Kolkata 8 Shri Debaprasad Sahoo SU: Jharkhand, SU: Odisha, 01-04-2014 Geologist ER, Ranchi ER, Bhubaneswar 9 Smt. Shalini Maurya SU: Jharkhand, SU: UP, 01-04-2014 Geologist ER, Ranchi NR, Lucknow 10 Shri Rabisankar Karmakar, NR, Lucknow ER, Kolkata 01-04-2014 Geologist 11 Shri Satyendra Baraik, M&CSD, Mangalore M&CSD, 01-04-2014 Geologist ER, Kolkata 12 Smt. Shreya Shrey, ER, Kolkata NEnR (M-IIB), 01-04-2014 Geologist CHQ, Kolkata 13 Shri K. C. Bandyopadhyay, CHQ, Kolkata Regional Mission- 01-04-2014 Director (G) II, ER, Kolkata 14 Ms. Geethumol K.G. ER, Kolkata NEnR (M-IIB), 01-04-2014 Geologist CHQ, Kolkata 15 Shri Amrit Chandan Patra SU: UP, SU: Odisha, 02-05-2014 Geologist NR, Lucknow ER, Bhunaneswar 16 Dr. C. P. Ramteke, ER, Kolkata NEnR (M-IIB), 02-04-2014 Geologist CHQ, Kolkata 17 Shri. Janardan Prasad SU:Gujarat, SU: Bihar, 02-04-2014 Director (G) WR, Gandhinagar ER, Patna 18 Shri Sarath Lalithakumari M&CSD, M&CSD, 03-04-2014 Gangadharan, Geolosist ER, Kolkata SR Mangalore 19 Shri R. C. Shukla SU: Odisha, SU: Rajasthan, 03-04-2014 Director (G) ER, Bhubaneswar WR, Jaipur 20 Smt. Niharika Mishra Training Institute, SU: Odisha, 04-04-2014 Geologist Hyderabad ER, Bhubaneswar 21 Shri Vinay Singh, SU: Jharkhand, SU: UP, NR, 04-04-2014 Geologist ER, Ranchi Lucknow 22 Shri B.M. Shah M&CSD, SR, Hyderabad 04-04-2014 Director (G) ER, Kolkata 23 Shri Ravi Prakash Choudhary, ER, Kolkata NR, Lucknow 06-04-2014 Executive Engineer 24 Smt. Mayukhee Ghosh, SU: P&HP, Earthquake 07-04-2014 Geologist NR, Chandigarh Geology Division, ER, Kolkata 25 Shri S. K. Sardar ER, Kolkata NER, Shillong 07-04-2014 Senior Geologist

85 26 Smt. Maitry Roy Moulik ER, Kolkata SU : Tripura 07-04-2014 Senior Geologist Mizoram (NER),Agartala 27 Shri P. K. Nanda WR, Jaipur SU: Odisha, ER, 07-04-2014 Director (G) Bhubaneswar 28 Smt. Ashamol T.L. SU: WB & AN, SU: Kerala, SR, 07-04-2014 Geologist ER, Kolkata Thiruvananthapura m 29 Shri K.V. Nambiar ER, Kolkata SU: MP, 08-04-2014 Director (G) CR, Bhopal 30 Shri M.K. Bhowmic, CHQ,Kolkata Geophysics 08-04-2014 Senior Geophysicist Division, ER, Kolkata 31 Shri Rupesh Kumar, SU: Arunachal SU: Bihar, 09-04-2014 Geologist Pradesh, NER, ER, Patna Itanagar 32 Dr. L.K. Thakur SU: Bihar, SU: Gujarat, 10-04-2014 Senior Geologist ER, Patna WR, Gandhinagar 33 Shri Amitabha Mullick, M&CSD, M&CSD, SR, 11-04-2014 Director (G) ER, Kolkata Mangalore 34 Shri Abhijit Mukherjee, ER, Kolkata SU: Jharkhand, 15-04-2014 Director (G) ER, Ranchi 35 Shri Sachin R, SU:WB&AN, SU:Kerala, SR, 15-04-2014 Senior Geologist ER, Kolkata Thiruvananthapura m 36 Shri K.P. Bandyopadhyay Curatoria Division, Palaeontology, 16-04-2014 Director (G) CHQ, Kolkata Lab, ER, Kolkata 37 Shri Arvind Kumar Singh SU: Bihar, Su : Maharashtra, 16-04-2014 Director (G) ER, Patna (Cr), Pune 38 Shri Debajyoti Bhattacharya M&CSD, Palaeontology Lab- 16-04-2014 Dy. Director General (G) ER, Kolkata II. CHQ, Kolkata 39 Shri Basant Kumar Singh SU: Bihar SU: Arunachal 16-04-2014 Senior Geologist ER, Patna Pradesh, NER, Itanagar 40 Shri Prakash Chandra Patra, SU: Odisha, SU: Bihar, 21-04-2014 Director (G) ER, Bhubaneswar ER, Patna 41 Shri Naveen Kumar SU: WB & AN, SU: J&K, 05-05-2014 Senior Geologist ER, Kolkata NR, Jammu 42 Shri Debtanu Das SU: J&K, SU: WB & AN, 05-05-2014 Geologist NR, Jammu ER, Kolkata 43 Shri Sudeep Manish Toppo SU: Arunachal SU: Jharkhand, 12-05-2014 Geologist Pradesh, NER, ER, Ranchi Itanagar 44 Shri Shashi Ranjan SU: Jharkhanad, NER, Shillong 12-05-2014 Senior Geologist ER, Ranchi 45 Shri Soumya Ranjan Mishra NER, Shillong SU: Odisha, 12-05-2014 Geologist ER, Bhubaneswar 46 Shri Ramdeep Shivliha, ER, Kolkata CR, Nagpur 19-05-2014 Executive Engineer 47 Shri CH Venkateswara Rao M&CSD, SR, M&CSD, 19-05-2014 Director (G) Visakhapatnam ER, Kolkata

86 48 Shri Ajay kumar M. V. SU:Odisha, ER, SU: Sikkim, 19-05-2014 Senior Geoloeist Bhubaneswar NER, Gangtok 49 Shri Ishtiyaq Ahmed CR, Nagpur M-IIB, 26-05-2014 Executive Engineer ER, Kolkata 50 Shri Partho Hridoy Bhattacharya, CR, Nagpur ER, Kolkata 28-05-2014 Executive Engineer 51 Shri S.V.N. Chandrasekhar, CHQ, Kolkata ER, Kolkata 29-05-2014 Senior Geophysicist 52 Shri Somprakash Sahu SU: Bihar, SU: Chhattisgarh, 01-06-2014 Senior Geologist ER, Patna CR, Raipur 53 Shri Sanjeev Raghav, M&CSD, M&CSD, 02-06-2014 Director (G) Mangalore ER, Kolkata 54 Shri K. Balasubramanian, PSS (P&M), CHQ HoD, 02-06-2014 Additional Director General and NMH (M-IV), ER, Kolkata. Kolkata 55 Shri Dinesh Kumar Rai WR: Jaipur SU: Odisha ER, 02-06-2014 Dy. Director General (G) Bhubaneswar 56 Shri Dinesh Chandra Jangid SU: Jharkhand, SU; Rajasthan, 02-06-2014 Geologist ER, Ranchi WR, Jaipur 57 Shri Ramalingam E Dy. Director RMH-I, SR, RMH-II, 12-06-2014 General (G) Hyderabad ER, Kolkata 58 Shri M. B. Beeraiah, SU: Odisha ER, RMH (M-III), 13-06-2014 Additional Director General Bhubaneswar SR, Hyderabad 59 Shri Jayaprakash Chathambath, SU: Odisha, ER, M&CSD, 16-06-2014 Supdtg. Geoloeist Bhubaneswar SR, Kochi 60 Shri Anupam Bara, M&CSD, M&CSD, SR, 16-06-2014 Senior Geologist ER, Kolkata Visakhapatnam 61 Shri Rajat Kumar Mishra, M&CSD, M&CSD, 26-06-2014 Senior Geologist ER, Kolkata SR, Kochi 62 Smt. Nanubala Vijay Durga, M&CSD, SR, M&CSD, 30-06-2014 Senior Geologist Visakhapatnam ER, Kolkata 63 Shri Prasanta Kumar Das, SU: Odisha, ER, Regional Mission- 30-06-2014 Director (G) Bhubaneshwar I, CR, Nagpur 64 Dr. Tapan Pal ER, Kolkata Su : Meghalaya, 14-07-2014 Director (G) (NER),Shillong 65 Shri Vijay Kumar Chittora, M&CSD, Kolkata Western Region, 04-08-2014 Director (G) Jaipur 66 Shri Subhrasuchi Sarkar, ER, Kolkata SU: MP, 13-08-2014 Suptdg. Geologist CR, Bhopal 67 Shri J. N. Choudhary, Western Region, Eastern Region, 08-09-2014 Superintending Engineer Jaipur Kolkata 68 Shri B.D. Thappa CHQ, Kolkata ER, Kolkata 05-11-2014 Additional Director General 69 Dr. Timir B. Ghoshal, PSS:P&M-V, EG Division, 17-11-2014 Suptdg. Geologist CHQ, Kolkata ER, Kolkata 70 Shri Nihar Ranjan Bhattacharjee, EG Division, PSS: P&M-V, 20-11-2014 Suptdg. Geologist ER, Kolkata CHQ, Kolkata

87 71 Dr. S.K. Som, SU: Sikkim, ER, Kolkata 24-11-2014 Director (G) NER, Gangtok 72 Shri Ramesh Chandra Kishan, SU:Assam, SU: Odisha, 25-11-2014 Geologist NER, Guwahati ER, Bhubaneswar 73 Shri S. N. Choudhuri, NER, Shillong ER, Kolkata 28-11-2014 Sr. Geophysicist 74 Shri Sudhesh Kumar, ER, Kolkata NER, Shillong 03-12-2014 Sr. Geophysicist 75 Smt. Tripti Roychoudury ER, Kolkata NER, Shillong 29-12-2014 Dy. Director General (G) 76 Shri K. Balasubramanian, HoD, PSS (P&M), CHQ, 31-12-2014 Additional Director General ER, Kolkata. Kolkata

SUPERANNUATION RETIREMENT

Sl. No. Name & Designation Retirement on Superannuation (w.e.f.) 1 S N Patel, Superintending Geologist 31-01-2014 2 Usha Roy, Deputy Director (Personnel And Administration) 31-01-2014 3 Girja Prasad Mohapatra, Senior Deputy Director General 28-02-2014 4 Ganesh Chandra Das, Survey Officer 28-02-2014 5 Swapan Kumar Das, Superintending Geologist 28-02-2014 6 Chitta Ranjan Maharana, Director(Geology) 31-03-2014 7 Mohan Mariappan, Deputy Director General(Geology) 31-05-2014 8 Santosh Kumar Sarkar, Survey Officer 31-05-2014 9 P K Mohanty, Director (Geology) 31-07-2014 10 K M Wanjarwadkar, Senior Geologist 29-08-2014 11 Uma Sankar Misra, Director(Geology) 31-08-2014 12 Prabir Roy, Assistant Director(Personnel And Administration) 31-08-2014 13 Banani Banerjee, Senior Chemist 30-09-2014 14 Ashok Mathur, Deputy Director General(Chemistry) 30-09-2014

88 Group-B (NG) and Group-C (Min. & Tech) Officials Period: January 2014 to December 2014. Promotion in Respect of Gr-B (T&M) (NG) during the period from October 2007 to September 2008 Gr. B” (NG) Sl No. Name Name Of The Post In Which Prom. Date Of Joining On Made Promotion 1. Shri N. P. Panigrahi Assistant 01.04.2014

Promotion in Respect of Gr-C(T&M) during the period from January to December 2014 Gr.’C” (M) & (T) S. No. Name Name of the post in which Dt. of Joining Promotion made on Promotion 1. Smt Maya Paul (Nee Das) Lab Assistant GR-II 03.07.2014 2. Shri Biswajit Paul Lab Assistant (Chem.) GR-II 03.07.14 3. Shri Arup Kr. Kar Lab Assistant (Geophysics) GR-II - 04.07.14 do- 4. Shri Sukhendu Halder Map Mounter (SR) 24.02.14 5. Shri Jananendra Nath Giri Drilling Assistant Gr. I 26.02.14 6. Shri Batul Ch. Singh -do- 28.03.14 7. Shri Narayan Ch. Das -do- 26.03.14 8. Shri Jogendra Oraon -do- 28.03.14 9. Shri Prabhu Ch. Soren -do- 27.02.14 10. Shri Ram Ch. Patra -do- 03.03.14 11. Shri Arjun Kr. Biswakarma -do- 24.02.14 12. Shri Karna Das -do- 26.02.14

MACP in respect of Group-B (T&M) and Group - C(T&M) S. No Name & Designation Stream Date of effect 1. Shri Nilotpal Datta, Asstt. Ministerial 01.09.14 2. Shri Sibram Majhi, Asstt. Ministerial 03.08.14 3. Shri Sureswar Singh, SK Ministerial 01.09.14 4. Shri A N Rajak, SK Ministerial 01.11.14 5. Shri Surendra NayaK, Asstt. Ministerial 09.07.14 6. Smt. Mamata Bhattacharjee(Nee Banerjee),JTA(Geol) Technical 13.02.14 7. Shri Utpal Bhattacharyay, TA(Drawing) Technical 03.01.14 8. Shri Falguni Biswas, TA(Drawing) Technical 07.01.14 9. Shri Tapas Kr. Roy, TA(Drawing) Technical 20.01.14 10. Shri Bholanath Bhowmik, TA(Drawing) Technical 27.07.14 11. Shri G. C. Gain, Sr. Surveyor Technical 05.02.14

89 12 Shri Y. R. Kalamkar, JTA (Drilling) Technical 19.01.14 13. Shri Tarun Kanti Nayak, TA(Drawing) Technical 01.08.14 14 Shri Shyamal Kanti Dasgupta, TA(Drawing) Technical 16.08.14 15 Shri Jaydeb Kr. Mandal, Sr. Surveyor 31.10.14

MACP in respect of Group-c (T&M) and Group - C(T&M) S. No Name & Designation Stream Date of effect 1. Shri D. I. Tudu(P/H), UDC Ministerial 04.08.14 2. Smt. Soma Basu (Majumder), UDC Ministerial 29.10.14 3. Shri Sarbeswar Gochhayat, LA(Geol. ) Gr. II Technical 27.06.14 4. Shri Debashis Deb, LA(Geophy.) Gr. I Technical 12.07.14 5. Shri Basudev Behera, Drilling Asstt. Gr. II Technical 06.01.14 6. Shri Teg Bahadur Gurung, Drilling Asstt. Gr. II Technical 09.07.14 7. Shri Sukru Nayak, Drilling Asstt. Gr. II Technical 30.06.14 8. Shri Sakura Munda, Drilling Asstt. Gr II Technical 05.07.14 9. Shri Keshab Ch. Das, Foreman (Carpenter) Technical 03.03.14 10 Shri Ananda Mahato, Drilling Asstt., Gr. II Technical 25.11.14 11 Shri Hari Singh, Driver Gr. I Technical 02.11.14 12 Shri Bhagabat Behera, LA(Geol.)Gr. II Technical 10.08.14 13. Shri Abdul Samad Shaik, LA(Geol) Gr. II Technical 30.11.14 14 Smt. Maya Paul (Nee Das), LA(Geol.) Gr.II Technical 28.11.14

Retirement cases in respect of Group-B and Group-C officials during January to December 2014 S. No. Name Designation Dt. of Retirement 1. Shri G. K. Roy Suptd . redesignated as Asstt. 31.05.14 2. Shri B. D. Mishra Suptd . redesignated as Asstt 31.01.14 3. Shri B. K. Chakraborty Suptd . redesignated as Asstt 28.02.14 4. Shri Sukanta Chakraborty Assistant 28.02.14 5.. Shri Tapan Das Assistant 31.03.14 6. Shri Rati Mahato Assistant 31.07.14 7.. Shri A. K. Rana Assistant 31.12.14 8 Shri Jiban Mukherjee PA 31.12.14 9. Shri Shib Nath Saha,) TA (DO 30.04.14 10. Shri N. N. Chattopadhyay Sr. Surveyor 30.06.14 11. Shri B. C. Sahoo, Sr. Surveyor 31.05.14 12 Shri P. K. Mohanty JTA(Drilling) 31.10.14 13 Shri Krishana Gopal Mal JTA(Drilling) 31.01.14 14 Shri Ram Jatan Mistry JTA (Drilling) 30.06.14

90 15 Shri S. N. Singh Sardar JTA(Drilling) 30.04.14 16 Shri Ranjit Kr. Karmakar Drilling Asstt. Gr. I 31.12.14 17 Shri Janendra Nath Giri Drilling Asstt. Gr. I 28.02.14 18 Shri Batul Ch. Singh Drilling Asstt. Gr. I 31.03.14 19 Shri Narayan Ch. Dey Drilling Asstt. Gr. I 31.03.14 20 Shri Arjun Kr. Biswakar Drilling Asstt. Gr. I 31.7.14 21 Shri Santi Ranjan Majumder Drilling Asstt. Gr. II 31.01.14 22 Shri Paresh Ch. Kalandi Drilling Asstt. Gr. II 31.01.14 23 Shri Joydev Patra Drilling Asstt. Gr. II 31.07.14 24 Shri Manick Ch. Das Drilling Asstt. Gr. II 31.01.14 25 Shri Miralal Mukherjee Drilling Asstt. Gr. II 30.04.14 26 Shri Barku Majhi Drilling Asstt. Gr. II 31.07.14 27 Shri Chunee Ram Mahato Drilling Asstt. Gr. II 25.02.14 28 Shri Gobinda Naik Drilling Asstt. Gr. II 31.05.14 29 Shri Gagan Mallick TO (D) 31.01.14 30 Shri Chedi Rout Driver Spl. Gr. 28.02.14 31 Shri Jagannath Singh Driver Spl. Gr. 31.12.14 32 Shri Ram Ch. Sahoo Driver Spl. Gr. 31.03.14 33 Shri S. B. Panda Driver Spl. Gr. 30.04.14 34 Shri Om Hari Singh, Driver Gr. I 31.01.14 35 Shri Bipad Bhajan Das Driver Gr. I 31.01.14 36 Shri Upendra Mahato Driver Gr. I 31.10.14 37 Shri Bablu Modak Driver Gr. I 31.10.14 38 Shri Jahangir Alam Driver Gr. I 31.01.14 39 Shri Rabi Sarkar Ghosal Driver Gr. I 31.08.14 40 Shri Sajal Dutta Driver Gr. I 30.06.14 41 Shri Dilip Kr. Saha, Driver Gr. I 30.11.14 42 Shri Dukhishyam Parida Driver Gr. I 31.05.14 43 Shri G. C. Rout Driver Gr. I 31.12.14 44 Shri Surya Bahadur Pradhan, Driver Gr. I 31.07.14

Death Case S. No. Name & Designation Date of Death 1. Lt. Jagannath Ghosh , JTA(Driiling) 18.06.14 2. Lt. Debraj Sethi, Assistant 20.10.14 3. Lt. Jina Lagan Ho, Drilling Asstt. Gr. II 14.02.14 4. Lt. Ramasaya Soren, Drilling Asstt. Gr. II 5. Lt. Pabani Mallick, Driver Gr.I 05.07.14

91 Resignation Case S. No. Name & Designation Dt. of Resign 1. Smt. Sangita Chandra, JTA (Ch.) 10.03.14

Transfer Cases S. No. Name Designation Transfer Dt.Joining Of On Transfer FROM TO 1. Smt. Poulami STA(G) TCS Divn Publication 17.11.14. Chatterjee(Ghosh) Division 2. Shri Chandan Kr. LA(Chemical) Petrology Divn. Chemical Divn. 26.08.14 Nandy, 3. Shri Rajat Datta TA(Drawing) Geophysics Division Geodata Division 28.08.14 Chowdhury, 5. Shri Rajesh Kumar JTA(Chemical) SU: P&HP, Eastern Region, 07.04.14 Chandigarh Kolkata 6. Shri Mukesh Kr. JTA(Chemical) Legal Cell, ER Chemical 03.04.14 Prasad Division 7. Shri Manotosh Lab.Asstt.(C) Geotechnical Lab. Chemical 03.04.14 Mahato Gr.III Division 8. Shri Hiralal Mallick Driver Gr.I Common Transport , SU:WB-A&N, 05.03.14 Pool, ER ER 9. Shri K. P. Rajmollo Driver Gr. I Common Transport , SU:WB-A&N, 07.04.14 Pool, ER ER

10. Shri Tapan Chandra Driver Gr. I Common Transport , SU:WB-A&N, 07.04.14 Pool, ER ER 11. Shri G. C. Halder Driver Gr. I SU: WB A&N, ER Geophysics 07.04.14 Division, ER 12 Shri Amiya Sarkar Driver Gr. I PSS Divn. SU: WB A&N, 07.04.14 ER 13 Shri B. K. Patwa Driver OG EG Division, ER SU: WB A&N, 07.04.14 ER 14 Shri Dhruba Mandi Driver Gr. I EG Divn, ER Geophysics 07.04.14 Divn,. ER 15 Shri B. K. Saha Driver Gr. I Common Pool, ERO PSS Division, 07.04.14 GSI, ER 16 Shri Anup Kumar Driver Gr. I Common Pool, ERO Geophysics 07.04.14 Das Division, ER 17 Shri T. K. Mistry Driver Gr. I Common Pool, ERO Geophysics 07.04.14 Division, ER 18 Shri Biswajit Mondal LA (Chem.) Gr. Estates cell, ER Chemical Div., 28.02.14 III ER 19 Shri Dinesh Mondal TOD Vigilance Vig and Engg 28.02.14 Divn 20 Shri Monojit Roy LA (Geol) Gr. III Security cell, ER Geotechnical 28.02.14 Lab, ER

92 21 Shri Pronab Kr. Dutta LA (Geol) Gr. III Estate Management Petrology 28.02.14 Division 22 Shri Atanu Nath LA(Chem) Gr III A/cs I Chemical 28.02.14 Division 23 Shri Arun Kr. Bhuj STA(Chem) ERO, Kolkata NRO, Lucknow 29.01.14

Transfer of Stores Stream. S. No Name Designation Transfer Date of effect From To 1. Shri Asit Kr Roy Store Clerk AP&M Divn Geotech Lab 26.09.14 2. Shri K. L. Mukherjee Store Keeper Geodata Divn AP&M Divn 16.12.14

Rotational Transfer of Gr B (NG) & Gr (C) (M) on dated 14th August, 2014

During 2014, Rotational transfer in respect of 51 Nos Ministerial staff in the grade of Gr “B” (NG) and Gr (C) have been done. List on next page

95 1. Indian sundarbans, a hot spot of biodiversity, fall under the jurisdiction of GSI, Eastern Region and M & CSD, Kolkata is engaged in carrying out various geological studies to decipher information on sea level change, coastal erosion & accretion, shifting pattern of rivers etc. 2. The name may have been derived from the Sundari trees (the mangrove species Heritiera fomes ) that are found in Sundarbans in large numbers. 3. The Sundarban Delta with geo-genetic link to the tectonic Bengal Basin is one of the world’s widest, deepest and tectonically active deltas. The Sundarban Delta Complex and its surroundings have dynamic physiographical and geomorphologic features. Extensive thick layer of floodplain deposits, rise of sea level and due to various other geographical conditions, the deltas have prograded in phases. 4. Sundarbans National Park is the largest mangrove swamp in the world. This place is distinguished by the productive growth of littoral mangrove vegetation. 5. It is spread out in an area of almost 1,330 square kilometer in India and awarded as a “UNESCO World Heritage Site” in 1987. 6. The site is intersected by a complex network of tidal waterways, mudflats and small islands of salt-tolerant mangrove forests and presents an excellent example of ongoing ecological processes. The area is known for its wide range of fauna, including 260 bird species, the Bengal tiger and other threatened species such as the estuarine crocodile and the Indian python. 7. The Sundarbans Tiger reserve is known to have the largest number of tigers in the entire world. 8. This Tropical delta is the largest single block of tidal halophytic mangrove forest in the world. 9. This Ganga – Bramhaputra delta which is the abode of sundarban is a conglomeration of 54 tiny islands of varying size and shapes. 10. The forests are the hub of various migratory birds such as Siberian cranes, yellow wagtail, wood sandpiper, Eurasian golden oriole to name a few. 11. Twenty-six of the fifty broad mangrove types found in the world grow well in the Sundarbans. The commonly identifiable vegetation that grow in the dense mangrove forests at the Sundarbans are salt water mixed forest, mangrove scrub, brackish water mixed forest, littoral forest, wet forest and wet alluvial grass forests. 12. One of the greatest challenges people living on the Ganges Delta may face in coming years is the threat of rising sea levels. Compiled from secondary sources…

Cover page photograph: 95m high Lower Rockfill Dam of 900MW Purulia Pumped Storage Project, Purulia District, West Bengal,(the first large project of this kind in India where GSI was associated from feasibility study to construct