青海南部地区MVT型Pb-Zn矿床研究回顾

摘要

Based on study of Pb-Zn ore deposit in southern regions of Qinghai, it is concluded that large-scale of thrust-nappe structure systems generated in Cenozoic in Qinghai Southern regions with its correspondingly generated Tertiary foreland basins and many large Pb-Zn ore deposits such as Dongmozhazhua, Mohailaheng and Chaqupazha all distribute over Nangqian-shanglaxiu Basin and Tuotuo River Basin, which are the overlapped areas between thrust-nappe and foreland basins. Its formation is controlled by large thrust-nappe structure in India-Eurasia collision zone and it, as is demonstrated in study of mineralization geological tectonic setting, mineralization mechanism and ore deposit fluid, has the characteristics of MVT-typed Pb-Zn ore deposits. All of these findings play an inspiring role in study of MVT-typed Pb-Zn ore deposit under the mechanism of exploration of thrust-nappe structure in the southern regions of Qinghai.%通过对青海南部地区铅锌矿床的研究总结,认为青海南部地区发育新生代大规模逆冲推覆构造系统,以及相伴产生的第三纪前陆盆地.东莫扎抓、莫海拉亨和茶曲帕查等大型Pb-Zn矿床,就分布于逆冲推覆与前陆盆地叠合部位的囊谦-上拉秀盆地、沱沱河盆地中,其形成受印度-欧亚大陆碰撞带中大型逆冲推覆构造控制.成矿地质构造背景、成矿机制及矿床成矿流体研究表明,其具有MVT型铅锌矿床的特征,这对于在青海南部地区勘查逆冲推覆构造机制制约下的MVT型铅锌矿床具有重要的启示意义.