摘要
拉尔玛金矿床位于西秦岭西段南亚带西倾山的金成矿带上。赋矿地层为下寒武统俄都组的含炭绢云母板岩及含炭硅质板岩,金矿体多位于背斜轴部的倾状部位,呈层状、似层状、分枝状产出,受地层、构造的双重控制。本文对该区金矿床的地质特征、围岩蚀变特征及控矿地质条件、矿床成因均作了阐明和分析。通过综合研究,拉尔玛金矿床属层控—后期热液(热卤水)再造炭硅灰(泥)岩型微细粒型金矿床。
Laerma gold deposit is located at Xiqingshan gold metallogenic belt in the south west zone of the west of Xiqinling Mountain. The ore bearing strata are carbonaceous sericite slate and carbonaceous siliceous slate of Edu Group of Lower Cambrian system. The gold ore body,located in the tilted place of the anticline axis, as layered, semi-layered and branched, is controlled by the strata and structure. This paper has described and analyzed the geological characteristics,wallroek alteration characteristics and ore-controlling geology conditions of the gold deposits in the region. Through comprehensive study,it is proposed that Laerma gold deposit is belonged to strata-controllinglater hydrothermal fluid（hot brine）rebuilding-fine grain type gold deposit of carbon silica limestone（mud）rock type.
出处
《矿产与地质》
2017年第1期99-105,共7页
Mineral Resources and Geology
关键词
拉尔玛金矿床
地质特征
围岩蚀变
控矿因素
甘肃碌曲
Laerma gold deposit, geological feature, wall rock alteration, ore-controlling factor, Luqu in Gansu
