Japan Geoscience Union Meeting 2015

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International Session (Oral)

Symbol S (Solid Earth Sciences) » S-MP Mineralogy & Petrology

[S-MP09] Supercontinents and Crustal Evolution

Wed. May 27, 2015 11:00 AM - 12:57 PM 201A (2F)

Convener:*Madhusoodhan Satish-Kumar(Department of Geology, Faculty of Science, Niigata University), Yasuhito Osanai(Division of Evolution of Earth Environments, Faculty of Social and Cultural Studies, Kyushu University), Geoffrey H. Grantham(Council for Geoscience, P/Bag X112, Pretoria, SOUTH AFRICA), Sajeev Krishnan(Centre for Earth Sciences, Indian Institute of Science, Bangalore 560 012, INDIA), Tomokazu Hokada(National Institute of Polar Research), Chair:Tetsuo Kawakami(Graduate School of Science, Kyoto University), Tomokazu Hokada(National Institute of Polar Research)

Supercontinent formation and dispersion has been enigmatic in the Earth's history. Eurasia is one such current supercontinent and incredible progress in the understanding of its geological evolution has been achieved in the past decade. Earlier supercontinents in the Earth's history such as Gondwana (0.5 Ga), Rodinia (1.0 Ga), Columbia/Nuna (2.0 Ga), Kenorland (2.5 Ga) and Vaalbara (3.1 Ga), have been the focus of several studies, however limited information on older supercontinents has restricted an understanding their tectonic evolution. Several important unsolved issues remain, such as how, when and where these supercontinents formed and how long they remained as such before breaking apart. Additional questions arise on the processes that triggered the fragmentation and unification of continents. In this session, we invite authors around the world to present original new data as well as review results on the continental scale crustal processes and tectonic evolution that are associated with supercontinent formation events in Earth's history. The well-studied Eurasia and Gondwana supercontinents are of particular focus. Topics of interest include, but not restricted to, extremes in metamorphism, P-T-d-t evolution, magmatism, and the role of fluids. We hope to provide a platform for scientific discussions that will enlighten our understanding of the physical and chemical processes in the continental crust that records episodes of orogenesis that contributed to the formation and evolution of supercontinents.

11:00 AM - 11:30 AM

★ [SMP09-05] East Antarctica and supercontinent configuration: the Dronning Maud Land perspective

*Joachim JACOBS1, Andreas LAEUFER2, Marlina ELBURG3, Wilfried JOKAT4 (1.Department of Earth Science, University of Bergen, PB 7803, N-5020 Bergen, Norway, 2.Bundesanstalt fur Geowissenschaften und Rohstoffe (BGR), Stilleweg 2, D-30655 Hannover, Germany, 3.Department of Geology, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa, 4.Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germnay)

11:45 AM - 12:00 PM

[SMP09-07] Sr and Nd isotopes in metacarbonate rocks as proxies for paleo-tectonic reconstruction prior to supercontinent assembly

*Madhusoodhan SATISH-KUMAR1, Naho OTSUJI2, Atsushi KAMEI3, Eiichi TAKAZAWA1, Noriyoshi TSUCHIYA4, Geoffrey GRANTHAM5, Masahiro ISHIKAWA6, Tetsuo KAWAKAMI7, Yasuhito OSANAI8 (1.Department of Geology, Niigata University, 2-8050 Ikarashi, Nishi-ku, Niigata 950-2181, Japan, 2.Graduate School of Science and Technology, Niigata University, Japan, 3.Department of Geosciences, Shimane University, Matsue, 690-8504, Japan, 4.Department of Geoscience and Technology, Graduate School of Engineering, Tohoku University, Japan, 5.Council for Geoscience, P/Bag X112, Pretoria, South Africa, 6.Department of Geology and Mineralogy, Kyoto University, Japan, 7.Graduate School of Environment and Information Sciences, Yokahama National University, Japan, 8.Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University, Japan)

12:00 PM - 12:15 PM

[SMP09-08] Comparison of Sr-Nd isotope data from N. Mozambique and Dronning Maud Land and Sor Rondane, Antarctica.

*Geoffrey GRANTHAM1, Madhusoodhan SATISH-KUMAR2, Naho OTSUJI3, Erasmus BURGER4, Tetsuo KAWAKAMI5, Masahiro ISHIKAWA6, Noriyosh TSUCHIYA7, ROUX, Petrus LE8 (1.Department of Geology, University of Johannesburg, South Africa., 2.Department of Geology, Niigata University, Japan, 3.Graduate School of Science and Technology, Niigata University, Japan, 4.Department of Geology, University of Pretoria, South Africa, 5.Department of Geology and Mineralogy, Kyoto University, Japan, 6.Graduate School of Environment and Information Sciences, Yokahama National University, Japan, 7.Department of Geoscience and Technology, Graduate School of Engineering, Tohoku University, Japan, 8.Department of Geological Science, University of Cape Town, South Africa)

12:48 PM - 12:51 PM

[SMP09-P05] Nd isotope geochemistry of Archaean BIFs in the Chitradurga Schist Belt, Dharwar Craton, Southern India

*Kentaro KOINUMA1, Madhusoodhan SATISH-KUMAR2, Kaoru MISHIMA3, Yuichiro UENO3, Tomokazu HOKADA4 (1.Graduate School of Science and Technology, Niigata University, Niigata, Japan, 2.Department of Geology, Faculty of Science, Niigata University, Niigata, Japan, 3.Department of Earth & Planetary Sciences, Tokyo Institute of Technology, Tokyo, Japan, 4.National Institute of Polar Research, Tachikawa, Tokyo, Japan)