摘要
本文从小秦岭金矿含金石英脉与其它岩体和脉岩的穿切关系,结合同位素地质年龄资料,探讨了小秦岭金矿的成矿时代。通过实际资料分析,认为小秦岭金矿的成矿时代为燕山构造岩浆活动期的末期,即在中生代晚白垩世到新生代第三纪古新世之初,成矿年龄为77—108Ma。
According to the relationships between gold-bearing quartz veins of the Xiaoqinling gold deposit and other rock bodies or vein rocks,and on the basis of the information of isotopic geochronology,the writer discussed the metallogenetic epoch of the Xiaoqinling gold deposit in this paper.Through analysing the actual information,the writer considered that the metallogene- tic epoch,of the Xiaoqinling gold deposit would belong to the end of the stru- ctural and magma activities of the Yanshanian cycle—between the later Cre- taceous Period of the Mesozoic era and the Palaeocene Epoch of the Ter- tiary of the Cenozoic era.The metallogenetic time is between 77 and 108 m.y.
出处
《陕西地质》
1989年第2期52-55,共4页
Geology of Shaanxi
