摘要
应用K-Ar法对青海省都兰县五龙沟金矿主断裂带内的3个断层泥样品进行同位素测定,以确定该脆性断裂的活动时代,初步探讨该段脆性断裂与成矿之间的关系。测试得到的断层泥样品中自生伊利石的年龄为(185.54±3.06)^(165.11±3.28)Ma,表明该矿床内的脆性断裂活动时代为早侏罗世晚期—中侏罗世,结合野外地质情况,推测脆性断裂的活动对成矿起到了改造和破坏的作用。
In this paper, K-Ar dating of three fault gouge samples from the main fault belt in Wulonggou gold ore in Dulan, Qinghai Province were made to determine the activity time of the brittle fault. Then the relationship between the main fault and mineralization was discussed. The age of self-generated illite within the fault gouge samples is 185.54 ±3.06 to 165.11 ±3.28 Ma, which represents the formation epoch of the main fault being the late of Early Jurassic to Middle Jurassic. Combining with the field geological condition, it is suggested that main fault damaged and modified mineralization in the late of Early Jurassic to Middle Jurassic
出处
《地质力学学报》
CSCD
2013年第4期385-391,446,共8页
Journal of Geomechanics
基金
中国地质调查局国土资源大调查项目(1212010711510
1212011120182
1212011221111)
科技部国际科技合作重点项目(2006DFB211330)
关键词
K-AR年龄
断层泥
五龙沟金矿
青海省
K-Ar dating
fault gouge
Wulonggou gold deposit
Qinghai Province
