Neoproterozoic to Early Palaeozoic continental collision and breakup tectonics in the Sor Rondane Mountains and the Lutzow-Holm Bay area, East Antarctica
Project/Area Number |
25400483
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Geology
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Research Institution | Niigata University |
Principal Investigator |
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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Keywords | 東南極 / ゴンドワナ超大陸 / リュツォホルム岩体 / セールロンダーネ山地 / 大陸衝突 / 断層 / 褶曲 / 大構造 / 大陸衝突帯 / 圧縮テクトニクス / 引張テクトニクス / スリランカ / マイロナイト化作用 |
Outline of Final Research Achievements |
In this paper we clarify the history of deformation in the Sor Rondane Mountains (SRMs) and the Lutzow-Holm Complex (LHC), East Antarctica, and construct their form-line contour maps and cross sections of the metamorphic and plutonic rocks in order to comprehend their structural features and provide constraints on the collisional tectonics of East and West Gondwana. Geological features of the SRMs resulted from collisional metamorphism and deformation (640-600 Ma), through crustal thinning, horizontal extension or compression after 600 Ma, sinistral transpression (600-560 Ma), to horizontal extension related to dextral shearing (560-550 Ma) in the East African and Antarctic Orogen (EAAO). The LHC is not uniform and includes several types of metamorphic units or fragments of the Latest Proterozoic to Early Paleozoic crust that were formed through distinct P-T-t evolutionary processes and divided by several faults. The LHC may have been situated in a different orogen from the EAAO.
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Report
(4 results)
Research Products
(13 results)
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[Journal Article] Sinistral transpressional and extensional tectonics in Dronning Maud Land, East Antarctica, including the Sor Rondane Mountains2013
Author(s)
Toyoshima, T., Y. Osanai, S. Baba, T. Hokada, N. Nakano, T. Adachi, M. Otsubo, M. Ishikawa, and Y. Nogi
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Journal Title
Precambrian Res.
Volume: 234
Pages: 30-46
DOI
Related Report
Peer Reviewed
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[Journal Article] Geologic evolution of the Sør Rondane Mountains, East Antarctica : Collision tectonics proposed based on metamorphic processes and magnetic anomalies2013
Author(s)
Osanai, Y., Nogi, Y., Baba, S., Nakano, N., Adachi, T., Hokada, T., Toyoshima, T., Owada, M., Satish-Kumar, M., Kamei, A., and Kitano, I
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Journal Title
Precambrian Research
Volume: 234
Pages: 8-29
DOI
Related Report
Peer Reviewed
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[Presentation] リュッツォホルム岩体の大構造2014
Author(s)
豊島剛志
Organizer
第81回西日本東南極セミナー
Place of Presentation
乗鞍高原BELL鈴蘭小屋(長野県松本市)
Year and Date
2014-06-28 – 2014-06-29
Related Report
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