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。
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.
出处
《地质力学学报》
CSCD
2004年第2期137-145,共9页
Journal of Geomechanics
关键词
断裂带
控矿作用
地球化学
海南
geochemistry
fault zone
ore control
Qianjia,Hainan
