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MINERAL EXPLORATION CORPORATION LIMITED (A Government of India Enterprise) Dr EXECUTIVE SUMMARY MINERAL EXPLORATION CORPORATION LIMITED (A Government of India Enterprise) Dr. Babasaheb Ambedkar Bhavan High Land Drive Road, Seminary Hills NAGPUR – 440 006 1 GEOLOGICAL REPORT ON EXPLORATION (EAST COAST BAUXITE PROJECT) BAUXITE DEPOSIT OF SAPPARLA 2 & 3 BLOCKS VISAKHAPATNAM, ANDHRA PRADESH EXECUTIVE SUMMARY 1.0 LOCATION The bauxite deposits are situated at about 180 km from Vishakhapatnam on the State highway connecting the latter to the hydroelectric projects on the Sileru River. Each of the two bauxite-bearing plateaus extends over an area of about 1.5 sq.km. and occurs as a blanket, capping the khondalites. They are situated on the tops of two hills at elevations of about 1000 to 1250 m above mean sea level. 2.0 GEOLOGY The deposits are characterized by flat or gently rolling surface and presence of outcrops of bauxite over considerable stretches with thin overburden at places. The other characteristics of the ore are its low silica and Titania (2 to 3 %), moderate alumina (45-50 %) and somewhat high iron oxide (about 20%) contents. The predominant aluminous mineral is gibbsite, which accounts for over 95 % of the total alumina. This is very favourable for economic extraction of alumina by Bayer’s process. Boehmite occurs in very minor quantities in some places. Hematite, goethite, kaolin, rutile/anatase and in some cases lepidocrocite and sillimanite are the other minerals constituting the ore. 3.0 MINERALISATION Deposit is a product of Insitu chemical weathering of Khondalite, the parent rock. It occurs as a blanket cover over Khondalite. The major Bauxite mineral is gibbsite with minor amount of other bauxite minerals. 4.0 QUANTUM OF WORK DONE Covering 3.12 sq.km carried out the exploration. by large scale geological mapping and topographic survey; drilling of 173 vertical boreholes and 24 inclined boreholes (4178.10 m) by dry method; excavating 15 deep pits; chemical analysis of 5449 samples; carrying out integrated laboratory studies for determining the chemistry and mineralogy; and conducting three ore beneficiation tests and three autoclave tests. 2 5.0 ORE RESERVE ESTIMATION The ore reserves and their grade have been estimated by standard methods, at a cut-off of +40% Al2O3 and -5% SiO2. The accuracies of estimates of the basic parameters of bauxite have been computed by statistical methods to categorise the reserves into A, B & C categories, the stipulated accuracies for tonnages of these three categories for tonnages of these three categories being 90 %, 70-90 % and less than 70 % respectively. A total of 72.58 million tones of in situ reserves of bauxite, comprising 9.54, 28.11 and 34.93 million tones of A, B & C categories respectively has been estimated to be available from the two blocks together. The average thickness of the ore bodies is 13.15 m and their average contents of SiO2, Al2O3 and Fe2O3 are 2.18 %, 47.69 % and 21.32 % respectively. The block- wise reserves are: Block –2 : 34.32 million tones with 2.50 % SiO2 & 47.36 % Al2O3. Block -3 : 38.26 million tones with 1.90 % SiO2 & 47.99 % Al2O3. The results of the bench scale beneficiation tests by high intensity wet magnetic separation methods indicate that the alumina content of the Sapparla bauxite with about 46 % Al2O3, 3 to 4 % SiO2 and 24 % Fe2O3 can be upgraded by about 3.5 units with a percentage recovery of 88. These tests on a sample with 34.57 % Al2O3, 1.54 % SiO2 and 39.76 % Fe2O3 upgraded the alumina to 45.56 % at a weight percent recovery of about 68. Autoclave tests carried out on three samples of bauxite have shown that about 92-96 % of the total alumina and 98 % of the gibbsitic alumina is likely to be recovered by Bayer’s process The deposit has been categorised under Category ‘A’ of UNFC 221. Total Exploration Cost is Rs. 56.84 Lakhs. 3 Regional Geological Map, East Coast Bauxite Belt, Chintapalli Area, Andhra Pradesh T U O P H P Y E D R VISAKHAPATNAM 5' 5 E S 10' 15' 82° 20' BOMBAY 2 R I 0 A 1 L PARTS OF TOPO SHEETS 65K/1 AND 65K/5 K 8 E B R M A K U D M DUBGAM 18° HYDERABAD 0' DHARAKONDA MADRAS KAKULAGADDA KEY MAP 3416 SCALE : 7 4255 A:30 MILLION 4077 BURUGUPAKALU LOCATION MAP OF BAUXITE DEPOSITS IN PARTS OF ANDHRA PRADESH AND ORISSA SCALE : 3454 3585 25 m 0 25 50 75 m 82° 0' 82° 0' 83° 0' 3789 3681 19° TO RAIPUR 0' 5 JEYPORE GOLLAPALLE 3939 KORAPUT M A AD IM 3947 AN M.P. POTTANGI SALUR A 8 . L R A I MACHKHAND V RAIN GAUGE R AG 3731 A A . 3786 B R U A S S U ARAKU S R I E 10 L R I O S JERRELA BALIMELA VIZ DA 18° SILERU PROJECT VA LA 0' L. SILERU KA TOKARAVI LA PROJECT SAPPARLA CHINTAPALLE AR PP GUDEM SA 3092 VANTADIPALLE SAPPARLA 4127 NARSIPATNAM VISAK U G TANDAVA RESERVOIR V PANASAPALLE 10 O E 4075 D TANDAVA R. R 3 AV A 3392 6 3528 AR A N D H R A P R A D E S H I R. TUNI 3360 BAY OF BE CHINNA BUSI KONDA 4 17° 55' BAUXIT 4172 0' TO MADRAS 1 SIRABALU 82° 0' 3906 4085 KOTTAPALEM 82° 0' 83° 0' 4115 3708 LEGEND 4071 10 BATSALURU LANKAPAKALU 4152 2 KORUPALLE PASUVULA BANDA T 1 O BAUXITE DEPOSITS WITH BLOCK NUMBER 13 CH 3628 IN TA P AL 4 LE 3 BAUXITE DEPOSITS EXPLORED BY M.E.C.L. KM IN 1973 - 75 & 1976 - 77 3685 4727 CHERU KONDA EBLU M K 4 GUDEM E LL A P A O T T IN H AM C TN PA RINTADA SI M R K NA 52 M K 90 NI TU 11 3860 DEVARAPALLE 17° TO TO 50' MARRIPAKALU 12 KM PEDDAVALASA 6 KM. 5' 10' 15' 4632 82° 20' RAJANMUNDRY 132 KM 4 Geological map of Sapparla Bauxite Deposit, Block - 3, Andhra Pradesh K K K K E' a K K F' 0° 4 K b 1 K T-3 K G' K c ° 2° 43 4 T-29 K ° 8 d 3 K K e K f 8° K 4 K ° 7 3 a' j K B' ° 28 ° 41 T-30 6° 3 K K K K b' n K K C' T-28 K K m c' K p -27 ° T A' k 0 4 ° ° 8 1 3 K ° 4 K l 38 K K 8° K 2 d' K 2° q 4 r 5° g 3 K 9° 3 K 3° K 4 s ° 47 T-26 ° 6 T-16 K 4 D' K 3° 4 0° K ° 5 6 5 9° 2 K T e' -9 t Z-1 K K K Z-2 h K K K f ' K Z-3 g' Z-4 K K A 48° K 50° Z-5 T-10 h' 51° K Z-6 53° K T-7 53 ° B 56° 48° K K MN T-6 K 58° 50° C H' K T-8 j ' K K 0° K 3 ° K 39 ° 6 ° 2 1° u 40 3 D K K T-1 50 ° T-11 K K v K ° 38 ° 33 K w K k' 9° 2 Z-1' T-2 l ' 45 ° K x K K Z-2' m ' K T-13 n' E Z-3' 6° K 3 K -3 T Z-4' p' Z-5' K T-12 9° K 3 q' Z-6' K T-4 ° 38 K K K r ' ° 0 -5 J' 4 T F 9° K 3 G K 1° 3 s' K K 9° H 3 K' ° 38 y K 6° K 3 1° TO U.SILERU 3 82° 10' K L' T-14 RAIN GAUGE 3° K 3 M' SAPPARLA 942 BLOCK - 3 K 1242 0° K 4 K 7° 3 K 18° 18° 55' 55' N' 2° K 6° 4 3 BLOCK - 2 K 1230 1230 EAST COAST BAUXITE PROJECT J r COMPOSITE PLAN K P' SAPPARLA BLOCKS 2 & 3 K K LANKARAKALU i U' S C A L E - 1:63,360 K K L p K 4° j 4 K PART OF TOPOSHEET NO. 65 K/1 K K Q' K y ' K 5° m 3 h K K V' K M R' K 4° ° 3 36 ° 82° 10' TO CHINTAPALLE 38 5° S' 3 T-15 T-18 ° W ' 7 2 K 3 T -2 T-21 k 0 0 0 0 0 w ' T' 0 0 0 0 0 2 2 2 2 2 , , , , , N ° 8 56 57 58 59 60 3 K 53,800 53,800 P K K SECTOR - III X ' EAST COAST BAUXITE PROJECT DISPOSITION OF THE THREE SECTORS LEGEND Q 8° BLOCK - 2 3 K S C A L E K K K Bx BOUNDARY OF BAUXITE ZONE (OBSERVED & INFERRED) KHONDALITE 200 m 0 200 4000 600 800 1000 m 6° GEOLOGY BY : 3 K K (PARTIALLY LATERITISED (P.L.K.)/ KAOLINISED(K.K.)) 8° K 2 A.K. SAGAR 1973-75 -20 T-25 SCRAP LINE T 52,800 52,800 I.R.L. RAO -- do -- K SOIL / CLAY M. HASAN 1976-77 19 N VEERAJU -- do -- T -1 ATTITUDE OF FOLIATION / RELICT FOLIATION 5° 3 NBx R.C. SHARMA -- do -- NON BAUXITE h ' Y ' ° PS-1 DEEP PIT SURVEYED BY : 5 R 3 DRY VERTICAL BORE HOLE MONILAL 1973-76 REDUECED LEVEL (m) THICKNESS ALONG THE BORE HOLE (METRES) A.B.P. PILLAI 1976-77 51,800 51,800 3° B.M OVERBURDEN 3 R.L.1189.46 ° 5 Al2O3+ 3 T-24 SECTOR - II SiO3 % ° 35 T 40 TRIANGULATION STATION (MECL) K 4° BM 3 BENCH MARK (MECL) j' A A' SECTION LINE IN N50°E-S50°W S 2° a a' 3 K Y SECTION LINE IN N40°W-S40°E K a, a,' K Z, Z,' T-23 i ' 50,800 50,800 SECTION LINE IN N30°W-S30°E k' SECTOR - I TOPOGRAPHIC CONTOUR (2 METRE INTERVAL) 1160 ° ° 48 0 K 4 5° 3 X K JEEPABLE ROAD m' W r ' ° 45 p' V 2° T 4 K t ' K 49,800 49,800 K ° 00 00 00 00 00 36 2 2 2 2 2 u ' , , , , , 56 57 58 59 60 ' v ' 8° 4 1° 5 U m x ' BILASPUR K 80° 90 82° 84° A 22° EL 86° RK 22° 0U R TO RESERVOIR JHARSIGUDA H ° 44 T HIRAKUD DAM SAMBALPUR O N AGP 110 UR BHILAI RAIPUR Km 6 .
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