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ZHANG Wengao, WANG Xiaohu, CHEN Zhengle, DING Zhilei, ZHOU Rongde, HU Wenjie. 2020. The deformation characteristics of ductile shear zone and its relationship with mineralization in Lianhuashan fault zone, Guangdong Province[J]. Geology in China, 47(4): 932-943. doi: 10.12029/gc20200403
Citation: ZHANG Wengao, WANG Xiaohu, CHEN Zhengle, DING Zhilei, ZHOU Rongde, HU Wenjie. 2020. The deformation characteristics of ductile shear zone and its relationship with mineralization in Lianhuashan fault zone, Guangdong Province[J]. Geology in China, 47(4): 932-943. doi: 10.12029/gc20200403
shu

The deformation characteristics of ductile shear zone and its relationship with mineralization in Lianhuashan fault zone, Guangdong Province

  • 1.

    Key Laboratory of Paleomagnetism and Tectonic Reconstruction of Ministry of Natural Resources, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

  • 2.

    No. 262 Geological Party of Zhejiang Nuclear Industry Corp., Huzhou 313000, Zhejiang, China

  • 3.

    No. 931 Geological Party, Geological Bureau for Nonferrous Metals of Guangdong Province, Shantou 515041, Guangdong, China

    • Fund Project: Supported by China Geological Survey (No.DD20160053, No.DD20190161), National Science and Technology Support Project (No. 2018YFC0604005), Foundation of CAGS (Chinese Academy of Geological Science) (No. DZLXJK201904) and National Natural Science Foundation of China (No. 41902214)
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  • Author Bio: ZHANG Wengao, male, born in 1988, assistant researcher, engages in ore field structure; E- mail:547027367@qq.com
Received Date:  11 September 2019
Revised Date:  18 June 2020
Publish Date:  25 August 2020
    Abstract

  • The Lianhuashan fault zone is an important NE-trending tectonic belt on the southeastern continental margin of China. It is not only an important boundary of secondary tectonic units but also controls the most important tin-copper polymetallic metallogenic belt in Guangdong Province. Previous studies show that the ductile deformation in Lianhuashan fault zone is closely related to the tin-copper polymetallic mineralization. However, there are still some disputes about the distribution of ductile deformation and its contribution to mineralization in Lianhuashan fault zone. In this study, by means of large-scale structural mapping and typical geological profiles of the Lianhuashan fault zone, in combination with the measurement of tensile lineation attitude and the observation of microstructure, the authors have reached the conclusion that the ductile deformation in the fault zone was formed by a series of in-situ shear zones striking nearly 60° in N-S direction, which are roughly parallel to each other. After ductile deformation, these shear zones were cut by brittle faults striking 30°. Ductile deformation controls the shape and scale of orebodies in Lianhuashan fault zone. In the late magmatic and hydrothermal activities, the space of preexisting ductile shear zone was utilized to precipitate and enrich metallogenic elements in the cracks of ductile deformation. The ore-prospecting work in Lianhuashan fault zone should be arranged around the ductile deformation area and should pay attention to the ore-hosting fractures near the ductile deformation.

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