[S-MP14] Supercontinents and Crustal Evolution

2016年5月24日(火) 15:30 〜 15:45 A07 (アパホテル&リゾート東京ベイ幕張)

コンビーナ:*Satish-Kumar Madhusoodhan(Department of Geology, Faculty of Science, Niigata University)、小山内康人(九州大学大学院比較社会文化研究院地球変動講座)、Grantham Geoffrey(Geology Department, University of Johannesburg, South Africa.)、Sajeev Krishnan(Centre for Earth Sciences, Indian Institute of Science)、外田智千(国立極地研究所)、座長:外田智千(国立極地研究所)

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.

15:30 〜 15:45

[SMP14-07] Geological evolution of the Archean Chitradurga schist belt, Dharwar Craton, southern India

*Madhusoodhan Satish-Kumar¹、Kaoru Mishima²、Tsuyoshi Toyoshima¹、Kentaro Koinuma³、Yoshiihiro Enya³、Itsuki Muramatsu³、Tomokazu Hokada⁴、Yuichiro Ueno²、Atsushi Kamei⁵、Kyoko Kataoka⁶、Krishnan Sajeev⁷ (1.Department of Geology, Faculty of Science, Niigata University、2.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan、3.Graduate School of Science and Technology, Niigata University, Japan、4.National Institute of Polar Research, 10-3, Midori-cho, Tachikawa-shi, Tokyo 190-8518, Japan、5.Department of Geosciences, Shimane University, Matsue 690-8504, Japan、6.Research Institute for Natural Hazards and Disaster Recovery, Niigata University、7.Centre for Earth Sciences, Indian Institute of Science, Bangalore 560 012 India)