LARGE-SCALE E-W THRUST NAPPES IN JIANCHUAN-HUTIAOXIA AREA, NW YUNNAN, CHINA: A DISCUSSION ON THE BOUNDARY OF THE YANGTZE CRATON AND TIBET-SANJIANG OROGENIC SYSTEM

SHA Shao-li; ZENG Pu-sheng; GOU Rui-tao; DAI Yan-juan; ZHANG Zi-xiong

Volume 21 Issue 3

Sep. 2015

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Article Navigation > Journal of Geomechanics > 2015 > 21(3): 438-445

SHA Shao-li, ZENG Pu-sheng, GOU Rui-tao, et al., 2015. LARGE-SCALE E-W THRUST NAPPES IN JIANCHUAN-HUTIAOXIA AREA, NW YUNNAN, CHINA: A DISCUSSION ON THE BOUNDARY OF THE YANGTZE CRATON AND TIBET-SANJIANG OROGENIC SYSTEM. Journal of Geomechanics, 21 (3): 438-445.

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LARGE-SCALE E-W THRUST NAPPES IN JIANCHUAN-HUTIAOXIA AREA, NW YUNNAN, CHINA: A DISCUSSION ON THE BOUNDARY OF THE YANGTZE CRATON AND TIBET-SANJIANG OROGENIC SYSTEM

1.
The No.3 Geological Brigade, Yunnan Bureau of Geoexploration and Development of Mineral Resources, Dali 671000, China
2.
National Research Center for Geoanlysis, Beijing 100037, China
3.
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
4.
Engineering Institute of Land and Resources, Kunming University of Science and Technology, Kunming 650000, China
5.
Yunnan Institute of Geological Sciences, Kunming 650000, China

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Received: 2015-01-26
Published: 2015-09-01

Abstract

Abstract

Based on the regional geological survey, the characteristics of the faults in Jianchuan-Hutiaoxia area and the boundary of the Yangtze Craton and Tibet-Sanjiang Orogenic System were discussed. The results show that there exist EW trending large-scale thrust nappe structures in this region. Through the observation of several sections which started from Jianchuan to Baihanchang-Ruhanping and Zhongyi Village in Lijiang, and ended in Hutiaoxia town (Xiatiaotou) in Shangri-La, it is revealed that the stable sequences including Paleozoic and Mesozoic Triassic strata of Yangtze craton are thrust nappes, overlying westward on the strata sequences of the Tibetan-Sanjiang orogenic system, with the thrusting distance over 50 km. Therefore the Jianchuan-Hutiaoxia fault is a narrow tectonic window instead of the boundary of the Yantze Craton and the Sanjiang orogenic system. The Erhai-Jianchuan-Lijiang-Muli fault is suggested as the boundary of the two plates, extending southward to the Red River fault.
- thrust nappe structure,
- tectonic window,
- Erhai-Jianchuan-Lijiang-Muli fault,
- Tibet-Sanjiang Orogenic System,
- Boundary,
- Yangtze Craton

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References(27)

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