藏南扎西康矿集区深部结构与成矿:来自地球物理的证据

焦彦杰; 黄旭日; 李光明; 梁生贤; 郭镜

doi:10.3799/dqkx.2018.352

Volume 44 Issue 6

Jun. 2019

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Article Navigation > Earth Science > 2019 > 44(6): 2117-2128

Jiao Yanjie, Huang Xuri, Li Guangming, Liang Shengxian, Guo Jing, 2019. Deep Structure and Mineralization of Zhaxikang Ore-Concentration Area, South Tibet: Evidence from Geophysics. Earth Science, 44(6): 2117-2128. doi: 10.3799/dqkx.2018.352

Citation:

Jiao Yanjie, Huang Xuri, Li Guangming, Liang Shengxian, Guo Jing, 2019. Deep Structure and Mineralization of Zhaxikang Ore-Concentration Area, South Tibet: Evidence from Geophysics. Earth Science, 44(6): 2117-2128. doi: 10.3799/dqkx.2018.352

Citation:

Jiao Yanjie, Huang Xuri, Li Guangming, Liang Shengxian, Guo Jing, 2019. Deep Structure and Mineralization of Zhaxikang Ore-Concentration Area, South Tibet: Evidence from Geophysics. Earth Science, 44(6): 2117-2128. doi: 10.3799/dqkx.2018.352

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Deep Structure and Mineralization of Zhaxikang Ore-Concentration Area, South Tibet: Evidence from Geophysics

doi: 10.3799/dqkx.2018.352

1.
School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China
2.
Chengdu Center of China Geological Survey, Chengdu 610081, China

Received Date: 2018-08-12
Publish Date: 2019-06-15

Abstract

Abstract

The Zhaxikang ore-concentration area (ZOCA) is the most abundant polymetallic ore enrichment area discovered recently in the South Tibet. However, the geophysical work carried out in the ore -concentrated areas is not sufficient due to the limited working conditions, and the deep structure and geological information are not clear, which seriously restricts the understanding of its mineralization and potential of the ore-concentrated areas and other important geological problems. In order to find out the deep geological structure and to discuss the deep mechanism of mineralization, measurements of gravity, magnetic and magnetotelluric were carried out in Zhaxikang area. By using gravity and magnetic anomalies due to two-dimensional wavelet decomposition, density and electrical structure model, and analyses of petrophysical and geological properties, it is indicated that there were 3-layers in geophysics of the Cuonadong gneiss dome. In addition, lower unit (core) mainly consisted of leucogranite, which extends north into the deep of the Zhaxikang Pb-Zn polymetallic deposit. The leucogranite combined with N-S normal faultsystem and other secondary faults made up the ore -forming system of the Zhaxikang overprinting and remobilization ore deposit. The Cuonadong gneiss dome was located in high and low zones of electrical blocks, with formation mechanism likely related with the South Tibet Detachment System (STDS). On the other hand, deep extension of Cuonadong rock and emplacement of leucogranite drove fluid circulation, and the Zhaxikang deposit was formed in combination with influence of other factors.
- Zhaxikang ore-concentration area,
- Cuonadong dome,
- fracture,
- deep structure,
- mineralization,
- geophysics

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Deep Structure and Mineralization of Zhaxikang Ore-Concentration Area, South Tibet: Evidence from Geophysics

doi: 10.3799/dqkx.2018.352

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