Tectonic Evolution and Coal Accumulation about the Southern Margin of Yili Basin in Xinjiang since Middle Cenozoic Era

LI Shengfu; CHEN Hongde; ZHOU Jian; WANG Mou; REN Manchuan; WANG Bing; A Zhongming

Northwestern Geology > 2016 > 49(2): 220-228.

LI Shengfu, CHEN Hongde, ZHOU Jian, et al. Tectonic Evolution and Coal Accumulation about the Southern Margin of Yili Basin in Xinjiang since Middle Cenozoic Era[J]. Northwestern Geology, 2016, 49(2): 220-228.

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Tectonic Evolution and Coal Accumulation about the Southern Margin of Yili Basin in Xinjiang since Middle Cenozoic Era

1. Chengdu University of Technology, Chengdu 610059, Sichuan China;
2. No. 216 Geologic Party, CNNC, Urumqi 830011, Xinjiang, China

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Received Date: May 22, 2015
Revised Date: December 25, 2015
Available Online: July 28, 2022
Published Date: June 04, 2016

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Abstract

The Yili basin is famous for its rich resources of coal and uranium, especiallyin the southern margin of this basin. From the angle of coal exploration, the tectonic pattern, sedimentary characteristics and coal bearing strata of the Middle-Lower Jurassic Shuixigou Group in the southern margin of the Yili basin have been studied in this paper through using the theory of structural geology, coal geology and sedimentology. After studying and analyzing the paleoclimate and sedimentary environment that related to coal accumulation, it's believed that the Shuixigou Group is a product of alluvial fan-fan delta system that formed in the warm and moist climate, whichis beneficial to the formation of peat swampenvironment, especially the Xishanyao Formation has basic conditions for forming stable and thick coal seam.This paper focuses on analyzing how the structures evolution since Millde Cenozoic era affect and control the formation and mineralization of coal. The results show that the regional tectonic background determinesthe formation and evolution of the basin, thus affecting the coal forming environment and coal potential in this studying area. The structure or structural features serve as the results of tectonic evolution after coal-forming, that is, the tectonic activities affect coal accumulation orpreservation, and the difference of tectonic activities impact the preservation state and distribution of coal seam.
- tectonic evolvement,
- coal accumulation,
- Shuixigou Group,
- southern margin of Yili Basin

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Tectonic Evolution and Coal Accumulation about the Southern Margin of Yili Basin in Xinjiang since Middle Cenozoic Era

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