CHARACTERISTICS OF MAJOR FAULT ZONES IN THE QIANJIA AREA AND ANALYSIS OF ROCK AND ORE CONTROL
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摘要: 千家地区断裂带主要有NE、NW、SN向,力学性质为张扭性和压扭性,生成于燕山期。SN向断裂带形变和蚀变程度最强烈,以强烈富集Ag、Pb、Zn、Au、Mo为特色,元素分异富集能力极强,元素的分带现象较明显,其控矿作用较强。NE向断裂带元素含量波动幅度大,常呈现出不同的元素组合分带。而NW向断裂带控矿作用相对较弱,元素含量波动幅度小,聚集能力相对较差,分异程度低。Abstract: The fault zones in the Qianjia area are mainly of NW, NE and N-S trends and geomechanically of tenso-shear and compresso-shear origin.They originated in the Yanshanian period. The N-S-trending fault zone has been most strongly deformed and altered and is characterized by strong enrichment in Mo, Ag, Pb, Zn, Au and Mo, a very strong capacity of element fractionation and concentration, a pronounced phenomenon of element zoning and relatively strong ore-controlling effect. In the NE-trending fault zone the element contents vary greatly, generally exhibiting zones of different element assemblages.For the NW-trending fault zone, its ore-controlling effect is relatively weak, the element contents show a small variation, the capacity of element concentration is relatively poor and the degree of element fractionation is low.
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Key words:
- geochemistry /
- fault zone /
- ore control /
- Qianjia,Hainan
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