Main Progresses in the Study of Precambrian Basement of the North Sulu Ultra-high Pressure Metamorphic Belt, Eastern China

Geoscience ›› 2013, Vol. 27 ›› Issue (2): 248-259.

• Engineering Geology and Environmental Geology • Previous Articles Next Articles

Main Progresses in the Study of Precambrian Basement of the North Sulu Ultra-high Pressure Metamorphic Belt, Eastern China

XU Yang^1,2, YANG Kun-guang^3,4, LI Ri-hui^1,2, HOU Fang-hui^1,2, QIN Ya-chao^1,2

1Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao,Shandong 266071, China;
2Qingdao Institute of Marine Geology, Qingdao, Shandong266071, China;
3Key Laboratory of Tectonics and Petroleum Resources，Ministry of Education，China University of Geosciences, Wuhan,Hubei 430074，China；
4Faculty of Earth Sciences，China University of Geosciences，Wuhan,Hubei430074，China

Received:2012-06-02 Revised:2013-01-10 Online:2013-04-01 Published:2013-04-22

Abstract

Abstract:

The north Sulu ultra-high pressure (UHP) metamorphic belt which is located at the eastern Muping-Jimo fault in eastern Shandong Peninsula is mainly characterized by Neoproterozoic bimodal igneous rocks. And its assemblages include a large number of granitic gneiss and a small amount of ultra basic/basic metamorphic rocks and metasedimentary rocks. The previous research of geochemical, zircon U-Pb, Lu-Hf isotope data revealed the geologic succession of the north Sulu UHP terrane. The Neoarchean-Paleoproterozoic ancient crust was remained and its initial crust evolution might start from Neoarchean or even earlier, then it undergone a series of magma-volcano-metamorphic events during 1.8-2.2 Ga. The bimodal magmatism, which caused by the rifting of the Rodinia Supercontinent at mid-Neoproterozoic (0.7-0.8 Ga) reworked the ancient and juvenile crust. As the same to the Sulu-Dabie orogen terrane，some characteristics of the Precambrian basement of the north Sulu UHP terrane are corresponding to Yangtze Block, and its northwestern boundary to the North China Block may be located along the Wulian-Yantai fault.

Key words: granitic gneiss, eclogite, O isotope, Hf isotope, the north Sulu ultra-high pressure metamorphic belt

CLC Number:

P534.1
P542

XU Yang, YANG Kun-guang, LI Ri-hui, HOU Fang-hui, QIN Ya-chao. Main Progresses in the Study of Precambrian Basement of the North Sulu Ultra-high Pressure Metamorphic Belt, Eastern China[J]. Geoscience, 2013, 27(2): 248-259.

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Main Progresses in the Study of Precambrian Basement of the North Sulu Ultra-high Pressure Metamorphic Belt, Eastern China

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