现代地质2026，Vol.40Issue(4)：1023-1033,11.DOI:10.19657/j.geoscience.1000-8527.202508260034
甘肃大店沟金矿床中脆硫锑铅矿的发现与成矿启示
Discovery of Jamesonite from the Dadiangou Gold Deposit,Gansu Province and Its Genetic Significance
摘要
Abstract
The newly identified jamesonite in the Dadiangou gold deposit,Liangdang County,Gansu Prov-ince,is closely associated with stibnite,galena,pyrite,and quartz.Detailed mineralogical,electron probe microanalysis(EPMA)and X-Ray Powder Diffraction(XRPD)reveal that its chemical composition(average formula Fe1.02Pb4.51Sb5.92S14.00)and crystal structure(monoclinic system,a=1.5383 nm,b=1.8716 nm,c=0.3937 nm)are in good agreement with theoretical values.This study not only identifies the mineral itself but,more importantly,we use its specific occurrence and composition as key geochemical indicators.The formation of jamesonite clearly indicates the injection of magma-derived fluids with high sulfur fugacity and enriched in Pb and Sb during the late stage of gold mineralization.This discovery provides robust mineralogical evidence for the involvement of magmatic-hydrothermal processes in the formation of the deposit under the shallow,variable geological conditions,thereby deepening the understanding of the mineralization mechanisms in this region.关键词
脆硫锑铅矿/矿物学特征/成因意义/大店沟金矿/甘肃Key words
jamesonite/mineralogy/genetic significance/Dadiangou Gold Deposit/Gansu分类
天文与地球科学引用本文复制引用
樊荣,司明扬,刘家军,张斌,曹瑞荣,来召,艾忠林,于谦,杜佰松..甘肃大店沟金矿床中脆硫锑铅矿的发现与成矿启示[J].现代地质,2026,40(4):1023-1033,11.基金项目
中国黄金集团地质有限公司项目"西秦岭地区李子园—大店沟一带金矿成矿规律与找矿预测研究"(2024-09) （2024-09）
国家自然科学重点基金项目"秦岭造山带金矿床中低熔点亲铜元素对金的超常富集作用与成矿机制"(42430813). （42430813）
