关键词: 构造解析, 韧性剪切带, 重力滑脱带, 变质核杂岩

Abstract:

Jianglang Dome lies at the western margin of the Tibetan Plateau, which has been identified as a metamorphic core
complex. It has good ore-forming physicochemical conditions and is well known in China because it contains several Cu-sulfide
deposits. Zhongzui copper deposit is characterised by polyphyletic, polyphase and polygenetic features, and has very close
relationship with the evolution of Jianglang metamorphic core complex. This study is focused on the structure and metallogenic
conditions of the Zhongzui copper deposit from the northern portion of the Jianglang Dome. On the basis of detailed field
observations, structural previous, and previous radiometric ages, we suggest that the ore-bearing rock series in Zhongzui copper
deposit underwent at least six stages of deformation, which were recorded by a series of foliations, and the ore bodies are mainly
controlled by Variscan ductile shear zone and major Yanshanian gravitational sliding zones. In this contribution, we studied the
ore-forming process and origin of the Zhongzui copper deposit including its ore-forming source, heating source, metal mobilization,
enriching process and precipitation locations, established a single metallogenetic model, and presented some prospecting locations
for similar copper deposits in the Jianglang Dome.

Key words: Structural analysis, Ductile shear zone, Gravitational sliding zone, Metamorphic core complex