THE RECOGNITION OF THRUST NAPPE STRUCTURE AND ITS TECTONIC SIGNIFICANCE IN BEISHAN AREA, WUSHI COUNTY, SOUTHWESTERN TIANSHAN

ZHA Xian-feng; CHEN Rui-ming; GU Ping-yang; HU Chao-bin; ZHUANG Yu-jun

2017 Vol. 23, No. 2

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ZHA Xian-feng, CHEN Rui-ming, GU Ping-yang, HU Chao-bin, ZHUANG Yu-jun. THE RECOGNITION OF THRUST NAPPE STRUCTURE AND ITS TECTONIC SIGNIFICANCE IN BEISHAN AREA, WUSHI COUNTY, SOUTHWESTERN TIANSHAN[J]. Journal of Geomechanics, 2017, 23(2): 243-252.

Citation:

THE RECOGNITION OF THRUST NAPPE STRUCTURE AND ITS TECTONIC SIGNIFICANCE IN BEISHAN AREA, WUSHI COUNTY, SOUTHWESTERN TIANSHAN

1.
Xi'an Center of Geological Survey, CGS, Xi'an 710054, Shannxi, China
2.
Orogen Research Center of China Geological Survey, Xi'an 710054, Shannxi, China

Received Date: 21 October 2016

Publish Date: 25 April 2017

Abstract

Abstract

Reasonably defining the tectonic attributes of Sorthwestern Tianshan not only has important scientific significance and practical value to the accurate division of Tianshan tectonic units, but also plays an importantrule in revealing the tectonic evolution during Paleozoic in Central Asian orogenic belt. Based on geological mapping and field structure analysis in Beishan area, Wushi County, Southwestern Tianshan, 5-phase deformation is recognized, including 2-phase thrust structures. The geometry and kinematics studies of the main thrust nappe structure prove that the thrust nappe structure yield with N-S direction. The structural deformation style of the thrust nappe can be established, and it presents root zone to front zone of nappe from north to south. According to the material composition and deformation features of thrust nappe structure, we think that Beishan area should be classified into the thrust nappe structure in north margin of Trim Plate in Paleozoic. It may provide deformational information for understanding the regional tectonic units division as well as the tectonic evolution in Southwestern Tianshan since Neopaleozoic.
- thrust nappe structure /
- division of tectonic units /
- structure analysis /
- Southwestern Tianshan

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References

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