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Zircon U-Pb age and Hf isotope evidence for an Eoarchaean crustal remnant and episodic crustal reworking in response to supercontinent cycles in NW India
Wei Wang;  Peter A. Cawood;   Manoj K. Pandit;  Mei-Fu Zhou;  Wei-Terry Chen
2017
Source PublicationJournal of the Geological Society
Volume174Issue:4Pages:759-772
Abstract

Scattered T-DM2 (3.8 - 3.2 Ga) for 3.28 - 2.99 Ga zircons from the Proterozoic Delhi Supergroup in northwestern India provide evidence for generation of juvenile crust and reworking of older crust. Depleted mantle-like epsilon(Hf(t)) values (+ 7.2 to + 5.6) for 2.86 - 2.71 Ga zircons indicate that generation of juvenile crust occurred during this period and ceased at 2.71 Ga. Extensive magmatism at 2.66 - 2.34, 2.11 - 2.01 and 1.60 - 1.37 Ga was dominated by reworking of pre-existing crust with variable ages, and the last two periods were accompanied by formation of juvenile crust. An Eoarchaean age of 3671 +/- 15 Ma represents the oldest age found in NW India. Zircons formed during supercontinent assembly have positive to negative epsilon(Hf(t)) values, suggesting involvement of juvenile and ancient crust, whereas largely positive epsilon(Hf(t)) values for zircons crystallized subsequent to supercontinent amalgamation suggest involvement of predominantly juvenile crust. Correlation of detrital age patterns and tectonomagmatic events indicates a conjugate position for northern Indian and the Cathaysia Block of South China during the assembly of Nuna. The South China Block remained juxtaposed to India until its separation from Pangaea in the late Palaeozoic.

 

Other Abstract

1 State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China 2 Department of Earth Sciences, The University of Hong Kong, Hong Kong, Hong Kong SAR, China 3 School of Earth, Atmosphere & Environment, Monash University, Melbourne, VIC 3800, Australia 4 Department of Earth Sciences, University of St Andrews, North Street, St Andrews KY16 9AL, UK 5 Department of Geology, University of Rajasthan, Jaipur 302004, Rajasthan, India 6 State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8084
Collection矿床地球化学国家重点实验室
Affiliation1.State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.Department of Earth Sciences, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
3.School of Earth, Atmosphere & Environment, Monash University, Melbourne, VIC 3800, Australia
4.Department of Earth Sciences, University of St Andrews, North Street, St Andrews KY16 9AL, UK
5.Department of Geology, University of Rajasthan, Jaipur 302004, Rajasthan, India
6.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Recommended Citation
GB/T 7714
Wei Wang;Peter A. Cawood; Manoj K. Pandit;Mei-Fu Zhou;Wei-Terry Chen. Zircon U-Pb age and Hf isotope evidence for an Eoarchaean crustal remnant and episodic crustal reworking in response to supercontinent cycles in NW India[J]. Journal of the Geological Society,2017,174(4):759-772.
APA Wei Wang;Peter A. Cawood; Manoj K. Pandit;Mei-Fu Zhou;Wei-Terry Chen.(2017).Zircon U-Pb age and Hf isotope evidence for an Eoarchaean crustal remnant and episodic crustal reworking in response to supercontinent cycles in NW India.Journal of the Geological Society,174(4),759-772.
MLA Wei Wang;Peter A. Cawood; Manoj K. Pandit;Mei-Fu Zhou;Wei-Terry Chen."Zircon U-Pb age and Hf isotope evidence for an Eoarchaean crustal remnant and episodic crustal reworking in response to supercontinent cycles in NW India".Journal of the Geological Society 174.4(2017):759-772.
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