Paleozoic Tectono-Metallogeny in the Tianshan-Altay Region, Central Asia
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Hereby we would offer our sincere gratitude to Academician Pei Rongfu and all the staff in the Institute of Mineral Resources, Chinese Academy of Geological Sciences for their beneficial support and assistance in related study. Many thanks rest with Academician Li Tingdong, Xiao Xuchang, Professor Li Jinyi, Liu Shaofeng, Mao Jinwen, Nie Fengjun, Wang Yu, Wang Tao, Xiao Wenjiao and Zhang Zuoheng, for their precious materials and valuable discussions. In all, their academic thoughts greatly enlighten this thesis. Liu Da (master student) helped us to draw many figures in the thesis.

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    Abstract:

    The research on Paleozoic tectonics and endogenic metallogeny in the Tianshan-Altay region of Central Asia is an important and significant project. The Altay region, as a collision zone of the Early Paleozoic (500–397 Ma), and the Tianshan region, as a collision zone of the early period in the Late Paleozoic (Late Devonian-Early Carboniferous, 385–323 Ma), are all the result of nearly N-S trending shortening and collision (according to recent magnetic orientation). In the Late Devonian-Early Carboniferous period (385–323 Ma), regional NW trending faults displayed features of dextral strike-slip motion in the Altay and Junggar regions. In the Tianshan region, nearly EW-trending regional faults are motions of the thrusts. However, in the Late Carboniferous-Early Permian period (323–260 Ma), influenced by the long-distance effect induced from the Ural collision zone, those areas suffered weaker eastward compression, the existing NW trending faults converted into sinistral strike-slip in the Altay and Junggar regions, and the existing nearly E-W trending faults transferred into dextral strike-slip faults in the Tianshan region. The Rocks of those regions in the Late Carboniferous-Early Permian period (323–260 Ma) were moderately ruptured to a certain tension-shear, and thus formed a number of world famous giant endogenic metal ore deposits in the Tianshan-Altay region. As to the Central Asian continent, the most powerful collision period may not coincide with the most favorable endogenic metallogenic period. It should be treated to “the orogenic metallogeny hypothesis” with caution in that region.

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WAN Tianfeng, ZHAO Qingle, WANG Qianqian.2015. Paleozoic Tectono-Metallogeny in the Tianshan-Altay Region, Central Asia[J]. Acta Geologica Sinica(),89(4):1120-1132

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History
  • Received:January 30,2015
  • Revised:May 08,2015
  • Adopted:
  • Online: August 14,2015
  • Published: