THE METALLOGENETIC STRESS FIELD AND RECONSTRUCTION OF DYNAMIC MECHANISM IN FUSHAN GOLD FIELD, SHANDONG
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摘要: 在估算了阜山金矿区成岩成矿期的构造差应力值后,获得约2km2区域内的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或应变强烈变化的区段,而非应力或应变的极高值或极低值处。依据应变测量和磁组构分析,研究了阜山金矿成岩期和成矿期的构造应变场特征,指出:阜山金矿在成岩和成矿期间构造应力场经历了由NE向挤压转为NW向挤压,构造应力场的这种转化对该区的成矿意义重大。Abstract: The space distributions of differential stress and principal stress in Fushan gold field are got from measuring tectonic differential stress value.Results show that the gold orebodies are always located in the areas where the tectonic stress value varies highly,not the minimum or maximum.Based on strain measurement and analysis of susceptibility anisotropy,the tectonic strain fields of the diagenetic and mineralization periods in Fushan gold field are given respectively.There was a transition of stress field from NW trending compression to NE trending compression during mineralization,and the tectonic environment of minerallization was changed from shear compress to shear -extension.
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