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Longitudinal and Temporal Evolution of the Tectonic Style Along The
Longitudinal and Temporal Evolution of the Tectonic Style Along the Cyprus Arc System, Assessed Through 2-D Reflection Seismic Interpretation Vasilis Symeou, Catherine Homberg, Fadi H. Nader, Romain Darnault, Jean-claude Lecomte, Nikolaos Papadimitriou To cite this version: Vasilis Symeou, Catherine Homberg, Fadi H. Nader, Romain Darnault, Jean-claude Lecomte, et al.. Longitudinal and Temporal Evolution of the Tectonic Style Along the Cyprus Arc System, Assessed Through 2-D Reflection Seismic Interpretation. Tectonics, American Geophysical Union (AGU), 2018, 37 (1), pp.30 - 47. 10.1002/2017TC004667. hal-01827497 HAL Id: hal-01827497 https://hal.sorbonne-universite.fr/hal-01827497 Submitted on 2 Jul 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Longitudinal and Temporal Evolution of the Tectonic Style Along the Cyprus Arc System, Assessed Through 2-D Reflection Seismic Interpretation Vasilis Symeou1,2 , Catherine Homberg1, Fadi H. Nader2, Romain Darnault2, Jean-Claude Lecomte2, and Nikolaos Papadimitriou1,2 1ISTEP, Universite Pierre et Marie Curie, Paris, France, 2Geosciences Division, IFP Energies nouvelles, Rueil-Malmaison, Key Points: • Lateral changes from a compressional France to a strike-slip regime along the Cyprus Arc • Different crustal nature in the eastern Abstract The Cyprus Arc system constitutes a major active plate boundary in the eastern Mediterranean Mediterranean region. -
Proceedings of the Open University Geological Society
0 OUGS Proceedings 5 2019_OUGSJ 26/02/2019 11:45 Page i Proceedings of the Open University Geological Society Volume 5 2019 Including articles from the AGM 2018 Geoff Brown Memorial Lecture, the ‘Music of the Earth’ Symposium 2018 lectures (Worcester University), OUGS Members’ field trip reports, the Annual Report for 2018, and the 2018 Moyra Eldridge Photographic Competition Winning and Highly Commended photographs Edited and designed by: Dr David M. Jones 41 Blackburn Way, Godalming, Surrey GU7 1JY e-mail: [email protected] The Open University Geological Society (OUGS) and its Proceedings Editor accept no responsibility for breach of copyright. Copyright for the work remains with the authors, but copyright for the published articles is that of the OUGS. ISSN 2058-5209 © Copyright reserved Proceedings of the OUGS 5 2019; published 2019; printed by Hobbs the Printers Ltd, Totton, Hampshire 0 OUGS Proceedings 5 2019_OUGSJ 26/02/2019 11:46 Page 35 The complex tectonic evolution of the Malvern region: crustal accretion followed by multiple extensional and compressional reactivation Tim Pharaoh British Geological Survey, Keyworth, Nottingham, NG12 5GG ([email protected]) Abstract The Malvern Hills include some of the oldest rocks in southern Britain, dated by U-Pb zircon analysis to c. 680Ma. They reflect calc- alkaline arc magmatic activity along a margin of the Rodinia palaeocontinent, hints of which are provided by inherited zircon grains as old as 1600Ma. Metamorphic recrystallisation under upper greenschist/amphibolite facies conditions occurred from c. 650–600Ma. Subsequently, rifting of the magmatic arc (c.f. the modern western Pacific) at c. 565Ma led to the formation of a small oceanic mar- ginal basin, evidenced by basaltic pillow lavas and tuffs of the Warren House Formation, and Kempsey Formation equivalents beneath the Worcester Graben. -
SILURIAN TIMES NEWSLETTER of the INTERNATIONAL SUBCOMMISSION on SILURIAN STRATIGRAPHY (ISSS) (INTERNATIONAL COMMISSION on STRATIGRAPHY, ICS) No
SILURIAN TIMES NEWSLETTER OF THE INTERNATIONAL SUBCOMMISSION ON SILURIAN STRATIGRAPHY (ISSS) (INTERNATIONAL COMMISSION ON STRATIGRAPHY, ICS) No. 27 (for 2019) Edited by ZHAN Renbin INTERNATIONAL UNION OF GEOLOGICAL SCIENCES President: CHENG Qiuming (Canada) Vice-Presidents: Kristine ASCH (Germany) William CAVAZZA (Italy) Secretary General: Stanley C. FINNEY (USA) Treasurer: Hiroshi KITAZATO (Japan) INTERNATIONAL COMMISSION ON STRATIGRAPHY Chairman: David A.T. HARPER (UK) Vice-Chairman: Brian T. HUBER (USA) Secretary General: Philip GIBBARD (UK) SUBCOMMISSION ON SILURIAN STRATIGRAPHY Chairman: Petr ŠTORCH (Czech Republic) Vice-Chairman: Carlo CORRADINI (Italy) Secretary: ZHAN Renbin (China) Other titular members: Anna ANTOSHKINA (Russia) Carlton E. BRETT (USA) Bradley CRAMER (USA) David HOLLOWAY (Australia) Jisuo JIN (Canada) Anna KOZŁOWSKA (Poland) Jiří KŘÍŽ (Czech Republic) David K. LOYDELL (UK) Peep MÄNNIK (Estonia) Michael J. MELCHIN (Canada) Axel MUNNECKE (Germany) Silvio PERALTA (Argentina) Thijs VANDENBROUCKE (Belgium) WANG Yi (China) Živilė ŽIGAITĖ (Lithuania) Silurian Subcommission website: http://silurian.stratigraphy.org 1 CONTENTS CHAIRMAN’S CORNER 3 ANNUAL REPORT OF SILURIAN SUBCOMMISSION FOR 2019 7 INTERNATIONAL COMMISSION ON STRATGRAPHY STATUTES 15 REPORTS OF ACTIVITIES IN 2019 25 1. Report on the ISSS business meeting 2019 25 2. Report on the 15th International Symposium on Early/Lower Vertebrates 28 3. Report on the 13th International Symposium on the Ordovician System in conjunction with the 3rd Annual Meeting of IGCP 653 32 GUIDELINES FOR THE ISSS AWARD: KOREN' AWARD 33 ANNOUNCEMENTS OF MEETINGS and ACTIVITIES 34 1. Lithological Meeting: GEOLOGY OF REEFS 34 SILURIAN RESEARCH 2019: NEWS FROM THE MEMBERS 36 RECENT PUBLICATIONS ON THE SILURIAN RESEARCH 67 MEMBERSHIP NEWS 77 1. List of all Silurian workers and interested colleagues 77 2. -
Geochemical Characterization, Petrogenetic Modelling And
Geochemical characterization, petrogenetic modelling and engineering behaviour of granitic rocks and basic dykes from the northern Indian plate in north-western Pakistan Muhammad Sajid Submitted to the University of Exeter as a thesis for the degree of Doctor of Philosophy in Geology in September 2016 This thesis is available for Library use on the understanding that it is copyright material and that no quotation from the thesis may be published without proper acknowledgement. I certify that all material in this thesis which is not my own work has been identified and that no material has previously been submitted and approved for the award of a degree by this or any other University. Signature: ………………………………………………………….. September 2016 1 Abstract The pre-Himalayan magmatic events along the northern margin of Indian plate in north-western Pakistan have been investigated and correlated with analogous magmatism in other Himalayan and northern Gondwana regions. The samples from Utla and Mansehra regions of NW Pakistan are dominantly megacrystic two mica granites, strongly peraluminous (A/CNK > 1.1) and intruded by aplite dykes and quartz-rich veins. The high precision zircon U-Pb ages (471-479 Ma) show their emplacement in early Paleozoic. These granites are enriched in light rare- earth elements (LREEs) and show similar chondrite normalized REE patterns with negative Eu anomalies (Eu/Eu* = 0.07–0.73). The geochemical signature and REE based modelling indicate that the granites are derived mainly from the partial melting of pelitic source followed by the evolution of melt via fractional crystallization resulting in the formation of aplites. Tourmaline occurrences in distinct modes show post-magmatic alteration of these granites triggered by hydrothermal fluids from different sources. -
Carboniferous Formations and Faunas of Central Montana
Carboniferous Formations and Faunas of Central Montana GEOLOGICAL SURVEY PROFESSIONAL PAPER 348 Carboniferous Formations and Faunas of Central Montana By W. H. EASTON GEOLOGICAL SURVEY PROFESSIONAL PAPER 348 A study of the stratigraphic and ecologic associa tions and significance offossils from the Big Snowy group of Mississippian and Pennsylvanian rocks UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1962 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director The U.S. Geological Survey Library has cataloged this publication as follows : Eastern, William Heyden, 1916- Carboniferous formations and faunas of central Montana. Washington, U.S. Govt. Print. Off., 1961. iv, 126 p. illus., diagrs., tables. 29 cm. (U.S. Geological Survey. Professional paper 348) Part of illustrative matter folded in pocket. Bibliography: p. 101-108. 1. Paleontology Montana. 2. Paleontology Carboniferous. 3. Geology, Stratigraphic Carboniferous. I. Title. (Series) For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, B.C. CONTENTS Page Page Abstract-__________________________________________ 1 Faunal analysis Continued Introduction _______________________________________ 1 Faunal relations ______________________________ 22 Purposes of the study_ __________________________ 1 Long-ranging elements...__________________ 22 Organization of present work___ __________________ 3 Elements of Mississippian affinity.._________ 22 Acknowledgments--.-------.- ___________________ -
Gondwana Large Igneous Provinces (Lips): Distribution, Diversity and Significance
Downloaded from http://sp.lyellcollection.org/ by guest on September 25, 2021 Gondwana Large Igneous Provinces (LIPs): distribution, diversity and significance SARAJIT SENSARMA1*, BRYAN C. STOREY2 & VIVEK P. MALVIYA3 1Centre of Advanced Study in Geology, University of Lucknow, Lucknow, Uttar Pradesh 226007, India 2Gateway Antarctica, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand 324E Mayur Residency Extension, Faridi Nagar, Lucknow, Uttar Pradesh 226016, India *Correspondence: [email protected] Abstract: Gondwana, comprising >64% of the present-day continental mass, is home to 33% of Large Igneous Provinces (LIPs) and is key to unravelling the lithosphere–atmosphere system and related tectonics that mediated global climate shifts and sediment production conducive for life on Earth. Increased recognition of bimodal LIPs in Gondwana with significant, sometimes subequal, proportions of synchronous silicic volcanic rocks, mostly rhyolites to high silica rhyolites (±associ- ated granitoids) to mafic volcanic rocks is a major frontier, not considered in mantle plume or plate process hypotheses. On a δ18O v. initial 87Sr/86Sr plot for silicic rocks in Gondwana LIPs there is a remarkable spread between continental crust and mantle values, signifying variable contributions of crust and mantle in their origins. Caldera-forming silicic LIP events were as large as their mafic counterparts, and erupted for a longer duration (>20 myr). Several Gondwana LIPs erupted near the active continental margins, in addition to within-continents; rifting, however, continued even after LIP emplacements in several cases or was aborted and did not open into ocean by coeval com- pression. Gondwana LIPs had devastating consequences in global climate shifts and are major global sediment sources influencing upper continental crust compositions. -
Northern England Serpukhovian (Early Namurian)
1 Northern England Serpukhovian (early Namurian) 2 farfield responses to southern hemisphere glaciation 3 M.H. STEPHENSON1, L. ANGIOLINI2, P. CÓZAR3, F. JADOUL2, M.J. LENG4, D. 4 MILLWARD5, S. CHENERY1 5 1British Geological Survey, Keyworth, Nottingham, NG12 5GG, United Kingdom 6 2Dipartimento di Scienze della Terra "A. Desio", Università degli Studi di Milano, Via 7 Mangiagalli 34, Milano, 20133, Italy 8 3Instituto de Geología Económica CSIC-UCM; Facultad de Ciencias Geológicas; 9 Departamento de Paleontología; C./ José Antonio Novais 228040-Madrid; Spain 10 4NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, 11 Nottingham, NG12 5GG, United Kingdom 12 5British Geological Survey, Murchison House, Edinburgh, United Kingdom 13 14 15 Word count 7967 16 7 figs 17 1 table 18 67 references 19 RUNNING HEADER: NAMURIAN FARFIELD GLACIATION REPONSE 1 20 Abstract: During the Serpukhovian (early Namurian) icehouse conditions were initiated 21 in the southern hemisphere; however nearfield evidence is inconsistent: glaciation 22 appears to have started in limited areas of eastern Australia in the earliest Serpukhovian, 23 followed by a long interglacial, whereas data from South America and Tibet suggest 24 glaciation throughout the Serpukhovian. New farfield data from the Woodland, 25 Throckley and Rowlands Gill boreholes in northern England allow this inconsistency to 26 be addressed. δ18O from well-preserved late Serpukhovian (late Pendleian to early 27 Arnsbergian) Woodland brachiopods vary between –3.4 and –6.3‰, and δ13C varies 28 between –2.0 and +3.2‰, suggesting a δ18O seawater (w) value of around –1.8‰ 29 VSMOW, and therefore an absence of widespread ice-caps. The organic carbon δ13C 30 upward increasing trend in the Throckley Borehole (Serpukhovian to Bashkirian; c. -
Large Igneous Provinces and Mass Extinctions: an Update
Downloaded from specialpapers.gsapubs.org on April 29, 2015 OLD G The Geological Society of America Special Paper 505 2014 OPEN ACCESS Large igneous provinces and mass extinctions: An update David P.G. Bond* Department of Geography, Environment and Earth Science, University of Hull, Hull HU6 7RX, UK, and Norwegian Polar Institute, Fram Centre, 9296 Tromsø, Norway Paul B. Wignall School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK ABSTRACT The temporal link between mass extinctions and large igneous provinces is well known. Here, we examine this link by focusing on the potential climatic effects of large igneous province eruptions during several extinction crises that show the best correlation with mass volcanism: the Frasnian-Famennian (Late Devonian), Capi- tanian (Middle Permian), end-Permian, end-Triassic, and Toarcian (Early Jurassic) extinctions. It is clear that there is no direct correlation between total volume of lava and extinction magnitude because there is always suffi cient recovery time between individual eruptions to negate any cumulative effect of successive fl ood basalt erup- tions. Instead, the environmental and climatic damage must be attributed to single- pulse gas effusions. It is notable that the best-constrained examples of death-by- volcanism record the main extinction pulse at the onset of (often explosive) volcanism (e.g., the Capitanian, end-Permian, and end-Triassic examples), suggesting that the rapid injection of vast quantities of volcanic gas (CO2 and SO2) is the trigger for a truly major biotic catastrophe. Warming and marine anoxia feature in many extinc- tion scenarios, indicating that the ability of a large igneous province to induce these proximal killers (from CO2 emissions and thermogenic greenhouse gases) is the single most important factor governing its lethality. -
Crustal Structure of the Eastern Anatolia Region (Turkey) Based on Seismic Tomography
geosciences Article Crustal Structure of the Eastern Anatolia Region (Turkey) Based on Seismic Tomography Irina Medved 1,2,* , Gulten Polat 3 and Ivan Koulakov 1 1 Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Prospekt Koptyuga, 3, 630090 Novosibirsk, Russia; [email protected] 2 Sobolev Institute of Geology and Mineralogy SB RAS, Prospekt Koptyuga, 3, 630090 Novosibirsk, Russia 3 Department of Civil Engineering, Yeditepe University, 26 Agustos Yerleskesi, 34755 Istanbul, Turkey; [email protected] * Correspondence: [email protected]; Tel.: +7-952-922-49-67 Abstract: Here, we investigated the crustal structure beneath eastern Anatolia, an area of high seismicity and critical significance for earthquake hazards in Turkey. The study was based on the local tomography method using data from earthquakes that occurred in the study area provided by the Turkiye Cumhuriyeti Ministry of Interior Disaster and Emergency Management Directorate Earthquake Department Directorate of Turkey. The dataset used for tomography included the travel times of 54,713 P-waves and 38,863 S-waves from 6355 seismic events. The distributions of the resulting seismic velocities (Vp, Vs) down to a depth of 60 km demonstrate significant anomalies associated with the major geologic and tectonic features of the region. The Arabian plate was revealed as a high-velocity anomaly, and the low-velocity patterns north of the Bitlis suture are mostly associated with eastern Anatolia. The upper crust of eastern Anatolia was associated with a ~10 km thick high-velocity anomaly; the lower crust is revealed as a wedge-shaped low-velocity anomaly. This kind of seismic structure under eastern Anatolia corresponded to the hypothesized existence of Citation: Medved, I.; Polat, G.; a lithospheric window beneath this collision zone, through which hot material of the asthenosphere Koulakov, I. -
Tectonic Regimes in the Baltic Shield During the Last 1200 Ma • a Review
Tectonic regimes in the Baltic Shield during the last 1200 Ma • A review Sven Åke Larsson ' ', Bva-L^na Tuliborq- 1 Department of Geology Chalmers University of Technology/Göteborij U^vjrsivy 2 Terralogica AB November 1993 TECTONIC REGIMES IN THE BALTIC SHIELD DURING THE LAST 1200 Ma - A REVIEW Sven Åke Larsson12, Eva-Lena Tullborg2 1 Department of Geology, Chalmers University of Technology/Göteborg University 2 Terralogica AB November 1993 This report concerns a study which was conducted for SKB. The conclusions and viewpoints presented in the report are those of the author(s) and do not necessarily coincide with those of the client. Information on SKB technical reports from 1977-1978 (TR 121), 1979 (TR 79-28), 1980 (TR 80-26), 1981 (TR 81-17), 1982 (TR 82-28), 1983 (TR 83-77), 1984 (TR 85-01), 1985 (TR 85-20), 1986 (TR 86-31), 1987 (TR 87-33), 1988 (TR 88-32),. 1989 (TR 89-40), 1990 (TR 90-46), 1991 (TR 91-64) and 1992 (TR 92-46) is available through SKB. ) TECTONIC REGIMES IN THE BALTIC SHIELD DURING THE LAST 1200 Ma - A REVIEW by Sven Åke Larson and Eva-Lena Tullborg Department of Geology, Chalmers University of Technology / Göteborg University & Terralogica AB Gråbo, November, 1993 Keywords: Baltic shield, Tectonicregimes. Upper Protero/.oic, Phanerozoic, Mag- matism. Sedimentation. Erosion. Metamorphism, Continental drift. Stress regimes. , ABSTRACT 1 his report is a review about tectonic regimes in the Baltic (Fennoscandian) Shield from the Sveeonorwegian (1.2 Ga ago) to the present. It also covers what is known about palaeostress during this period, which was chosen to include both orogenic and anorogenic events. -
Tectonic Evolution of the Northern Ural Orogen
Journal of the Geological Society, London, Vol. 152, 1995, pp. 903-906, 5 figs. Printed in Northern Ireland compression in the Early Devonian led to the inversion of the Timan and Varandey-Adz'va rifts to form ridges, which Tectonic evolution of the northern Ural acted as the source for the Middle Devonian clastic rocks Orogen found in the Timan-Pechora Basin. However, by the mid-Frasnian, shallow marine conditions were re- established, with carbonates deposited on highs and S. C. OTTO 1 & R. J. BAILEY 2 'Domanik' facies organic-rich shales laid down in the lPetroconsultants (UK) Ltd, 266 Upper Richmond intervening lows. Road, London SW15 6TQ, UK Closure of the ocean began in the Tournaisian, and 2Victoria Villa, 5 Station Road, Southwell, eastward subduction under the Siberian craton is made Nottinghamshire NG25 OET, UK evident by basement of volcanic island arc affinity found only to the east of the Urals (Churkin et al. 1981). In the Timan-Pechora Basin, the transpressional reactivation of faults resulted in the complete inversion of the earlier rifts. Local highs were formed, such as the Usa and Vozey highs, The closure of the Uralian Ocean occurred in Early Permian-Early which were a source of clastics during the Late Triassic time. In the northern Ural fold belt, overthrusting to the Tournaisian-Early Visean. Throughout the remainder of west produced a major foreland basin to the west of the mountain chain. In contrast, in the northern extension of the Ural Orogen, the Carboniferous and into the earliest Permian, the basin the Taymyr fold belt, thrusting was directed to the SE. -
3D Seismic Velocity Structure Around Plate Boundaries and Active Fault Zones 47
ProvisionalChapter chapter 3 3D Seismic Velocity Structure AroundAround PlatePlate BoundariesBoundaries and Active Fault Zones and Active Fault Zones Mohamed K. Salah Mohamed K. Salah Additional information is available at the end of the chapter Additional information is available at the end of the chapter http://dx.doi.org/10.5772/65512 Abstract Active continental margins, including most of those bordering continents facing the Pacific Ocean, have many earthquakes. These continental margins mark major plate boundaries and are usually flanked by high mountains and deep trenches, departing from the main elevations of continents and ocean basins, and they also contain active volcanoes and, sometimes, active fault zones. Thus, most earthquakes occur predomi‐ nantly at deep‐sea trenches, mid‐ocean spreading ridges, and active mountain belts on continents. These earthquakes generate seismic waves; strong vibrations that propagate away from the earthquake focus at different speeds, due to the release of stored stress. Along their travel path from earthquake hypocenters to the recording stations, the seismic waves can image the internal Earth structure through the application of seismic tomography techniques. In the last few decades, there have been many advances in the theory and application of the seismic tomography methods to image the 3D structure of the Earth's internal layers, especially along major plate boundaries. Applications of these new techniques to arrival time data enabled the detailed imaging of active fault zones, location of magma chambers beneath active volcanoes, and the forecasting of future major earthquakes in seismotectonically active regions all over the world. Keywords: 3D seismic structure, seismic tomography, Vp/Vs ratio, plate boundaries, crustal structure 1.