深地震反射剖面揭示的西藏娘热矿集区上地壳结构

doi:10.13278/j.cnki.jjuese.20170261

Abstract

Abstract: Deep seismic reflection technology is an important method to detect the deep structure of large-scale metallogenic belt and ore concentration area and reveal the background of mineralization. The authors explored the subsurface structure of the magmatic fluid passage in the vicinity of the Tibetan Niangre ore concentration area with iron, copper and other polymetallic deposits in the middle section of the Gangdese metallogenic belt, revealed the background of the mineralization and the corresponding fracture formation. Through the data processing such as tomostatics, de-noising, and predictive deconvolution of the 130 km deep seismic reflection profile crossing the Niangre ore concentration area, we obtained the reflected images of the upper crustal structure of the Niangre ore concentration area. Based on the geologic and geophysical data in this area, we studied the upper crustal structure of the ore concentration area, and found out the spatial relationship between the seven existing faults in the area and the distribution of the veins in the Gangdese metallogenic belt, and point out that some special structures such as the bright spot structure control the magma activity rising channel, and closely connected with the deposits.

Key words: deep reflection seismic, Niangre ore concentration area, Upper Crust, explanation, Gangdese metallogenic belt

CLC Number:

P631.4

Xu Tairan, Lu Zhanwu, Wang Haiyan, Li Hongqiang, Li Wenhui. Upper Crustal Structure of Tibetan Niangre Ore Concentration Area Revealed by Deep Seismic Reflection Profile[J].Journal of Jilin University(Earth Science Edition), 2018, 48(2): 556-565.

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Upper Crustal Structure of Tibetan Niangre Ore Concentration Area Revealed by Deep Seismic Reflection Profile

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