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Paleozoic Intrusive Rocks in the Nalati Mountain Range (NMR), Southwest Tianshan: Geodynamic Evolution Based on Petrology and Geochemical Studies

Huichao Zhang, Yongfeng Zhu, Wanyi Feng, Yuwen Tan, Fang An, Jiahao Zheng
School of Earth and Space Science, Peking University,Beijing 100871, China


The Tianshan orogenic belt, which is located in southwestern part of the CAOB, plays a crucial role in the reconstruction of the tectonic evolution of the southernmost CAOB. In this paper, the authors offer petrology, mineralogy, geochemistry and zircon Hf isotope with U-Pb age of the Paleozoic igneous rocks in the Nalati mountain range of southwest Tianshan, to limit the petrogenesis of the Paleozoic igneous rocks and rebuild the tectonic evolution of the Tianshan orogenic belt.

Based on zircon U-Pb ages and geochemical data, five types of granitoids have been identified, 480±5Ma, 410-445Ma, 345±5Ma, 320Ma, and 295Ma. They are corresponding to subduction of the Terskey Ocean, early subduction, late subduction, collisional, and post-collisional stages of the South Tianshan Ocean, respectively.

Paper Download: http://en.earth-science.net/WebPage/Article.aspx?id=1376

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Keywords:granite, Nalati mountain range (NMR), Tianshan orogenic belt, geodynamic evolution

DOI:
10.1007/s12583-016-0922-1
CLC number:
U469.72
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