宁夏二人山地区银铅矿地球化学特征及成矿物质来源

Geochemical characteristics and ore-forming material sources of silver lead deposits in errenshan area,Ningxia

研究区位于阿拉善微陆块南缘卫宁北山褶断带单梁山复背斜南翼,上覆地层为泥盆系和石炭系,银铅矿主要赋存于F18断裂带中。通过对矿床地质特征的总结,结合硫稳定同位素和流体包裹体测试,认为研究区的成矿类型属成矿物质与岩浆相关的受构造破碎带控制的破碎带蚀变岩型中低温热液多金属矿矿床。

The study area is located in the south wing of the danliangshan Anticline of the Weining Beishan fold fault zone in the south margin of the Alxa micro landmass.The overlying strata are Devonian system and Carboniferous system,and the silver lead ore mainly occurs in the F18 fault zone.Based on the summary of the geological characteristics of the deposit,combined with the tests of sulfur stable isotopes and fluid inclusions,it is considered that the ore-forming type of the study area belongs to the altered rock type meso low temperature hydrothermal polymetallic ore deposit controlled by the structural fracture zone,which is related to the ore-forming materials and magma.