The Eastern Ghats Province (EGP) of India, characterized by similar to 1 Ga granulite metamorphism (Ml), collided with the Archaean Indian craton in either Grenvillian (similar to 1 Ga) or Pan-African (similar to 0.6-0.5 Ga) time. At similar to 850 Ma, the Koraput Alkaline Complex (KAC) intruded into M-1 EGP granulites, and was metamorphosed during a second granulite event (M-2) in the EGP. U Pb zircon dates from gneisses in Koraput yield magmatic ages similar to 1500 Ma, with overgrowths at 1100-900 Ma and 800-700 Ma. Cratonic zircons from the EGP contact zone have Archaean 2.8-2.6 Ga cores with overgrowths at similar to 700 Ma. Titanites from a calc-silicate gneiss within the EGP define a U-Pb isochron around 700 Ma, whereas titanites from nepheline syenites within the KAC yielded a range of dates from 622 to 520 Ma. The c. 1500 Ma age in the EGP either implies Columbia break-up or proximity to a Columbia margin. The similar to 700 Ma age is interpreted as the age of M-2 granulite metamorphism that followed intracontinental thrusting of the EGP over similar to 2.8 Ga granulites of the Jeypore Province. The similar to 520 Ma titanite ages are correlated with final juxtaposition of the EGP-Jeypore Province amalgam with the Indian craton during Gondwana formation.
机构:
State Key Laboratory of Continental Dynamics,Department of Geology,Northwest UniversityState Key Laboratory of Continental Dynamics,Department of Geology,Northwest University
TONG Laixi
LIU Zhao
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State Key Laboratory of Continental Dynamics,Department of Geology,Northwest UniversityState Key Laboratory of Continental Dynamics,Department of Geology,Northwest University
LIU Zhao
LI Chao
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State Key Laboratory of Continental Dynamics,Department of Geology,Northwest UniversityState Key Laboratory of Continental Dynamics,Department of Geology,Northwest University
LI Chao
LU Junsheng
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State Key Laboratory of Continental Dynamics,Department of Geology,Northwest UniversityState Key Laboratory of Continental Dynamics,Department of Geology,Northwest University
LU Junsheng
YANG Wenqiang
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State Key Laboratory of Continental Dynamics,Department of Geology,Northwest UniversityState Key Laboratory of Continental Dynamics,Department of Geology,Northwest University
YANG Wenqiang
WANG Yanbin
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机构:
Institute of Geology,Chinese Academy of GeologicalState Key Laboratory of Continental Dynamics,Department of Geology,Northwest University
机构:
Liaoning Research Institute of Geology and Mineral Resources, Shenyang
College of Earth Sciences, Jilin University, ChangchunLiaoning Research Institute of Geology and Mineral Resources, Shenyang
Liu Y.
Han X.
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Liaoning Research Institute of Geology and Mineral Resources, Shenyang
School of Earth Sciences, China University of Geosciences, WuhanLiaoning Research Institute of Geology and Mineral Resources, Shenyang
Han X.
Liu Z.
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College of Earth Sciences, Jilin University, ChangchunLiaoning Research Institute of Geology and Mineral Resources, Shenyang
Liu Z.
Wu W.
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Liaoning Research Institute of Geology and Mineral Resources, ShenyangLiaoning Research Institute of Geology and Mineral Resources, Shenyang
Wu W.
Wang Y.
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Liaoning Research Institute of Geology and Mineral Resources, ShenyangLiaoning Research Institute of Geology and Mineral Resources, Shenyang
Wang Y.
Li H.
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Liaoning Research Institute of Geology and Mineral Resources, ShenyangLiaoning Research Institute of Geology and Mineral Resources, Shenyang
Li H.
Wang X.
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Liaoning Research Institute of Geology and Mineral Resources, ShenyangLiaoning Research Institute of Geology and Mineral Resources, Shenyang
Wang X.
1600,
China University of Geosciences
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机构:
Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R ChinaChinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
Zhang, Jin
Zhang, Yiping
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Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R ChinaChinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
Zhang, Yiping
Xiao, Wenxia
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China Natl Petr Corp, Geophys Co Ltd, Dept Changqing Geophys Survey, Xian 710021, Peoples R ChinaChinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
Xiao, Wenxia
Wang, Yannan
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Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R ChinaChinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
Wang, Yannan
Zhang, Beihang
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Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R ChinaChinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China