摘要
本文估算了阜山金矿区成岩成矿期构造差应力值 ,获得近 2km2 内主压应力和差异应力的空间分布规律 ,结果表明矿体部位往往对应于应力应变强烈变化区段 ,而并非极高值或极低值处。通过应变测量和磁组构分析 ,得到阜山金矿成岩期和成矿期构造应变场特征 ,指出阜山金矿构造应力场在成矿期经历了由NW向挤压转为NE向挤压转化的特征 。
The spatial distributions of differential stress and principal stress in the Fushan gold field are described by measuring tectonic differential stress values. Gold orebodies are always located in the areas where the tectonic stress varies greatly. Measuring strain and analyzing susceptibility anisotropy, we can get the tectonic strain field of the diagenetic period and mineralization period in the Fushan gold field. There was a transition of stress field from NW compression to NE compression during mineralization . The mineralization occurred when shear-compress deformation is converted to shear-extension.
出处
《地质地球化学》
CSCD
2001年第3期144-151,共8页
Geology-Geochemistry
基金
国家重点基础研究发展规划项目 (G19990 43 2 14 )
国家攀登计划预选项目 (95 预 3 9)
国家计委科技找矿项目(JG947110 )
关键词
构造应力场
构造应变场
应力场转化
界面成矿
阜山金矿区
Fushan gold field
tectonic stress field
tectonic strain field
transition of stress field
interfacial metallogenesis
