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NATURE AND EVOLUTION OF AMALGAMATED BASEMENT OF JUNGGAR BASIN, NORTHWESTERN CHINA: Sr-Nd ISOTOPE EVIDENCES OF BASEMENT IGNEOUS ROCK

Zheng Jianping 1 Wang Fangzheng 1 Cheng Zhongmei 1 Wu Xiaozhi 2 Zhang Yijie 2 (1. Faculty of Earth Sciences, China University of Geosciences, Wuhan430074, China; 2. Research Institute of Xinjiang Oil Adiministration Bureau, Karamay830000, China)  
The basement of Junggar basin in the shape of triangle, interspersed in the Tarim plate, Siberia plate and Kazakhstan plate, is the key to initiating the dispute on the Xinjiang geological evolution. The igneous rocks of basement act as the role of “igneous probe”. On the basis of the research into the detailed lithofacies, major elements and trace elements, the age dating research results of Sr_Nd isotope and zircon grain of the igneous rocks in different regions, together with the comprehensive results in Palaeozoic tectonic history, palaeontology, sedimentary formation, igneous rocks, intrusive rocks in the orogenic zone around the basin, indicate that the Junggar basement may have been a product of the soft collision and matching in tectonics between island arc systems located in the periphery of rigid bodies of the Kazakhstan plate, Tarim plates (?) and Siberia plate that occurred in different stages of the Paleozoic and subsequently experienced Mesozoic modification by tectonic_magmatic thermal events (such as the basic magmatic basal erosion).
【Fund】: 新疆石油管理局基础研究项目;; 国家自然科学基金 项目!(No .49873 0 0 9)
【CateGory Index】: P588.14
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