甘肃西成矿田铅锌矿床的成矿物质来源探讨  

SOURCE OF ORE-FORMING METALS FOR LEAD-ZINC DEPOSITS IN THE XICHENG OREFIELD,GANSU

作　　者：林兵[1] 程海生[1] 苏文明 陈迪云 

机构地区：[1]中国地质大学

出　　处：《地质科学》1992年第2期149-159,共11页Chinese Journal of Geology(Scientia Geologica Sinica)

摘　　要：本文系统地研究了甘肃省西成矿田铅锌矿床的地层地球化学和铅同位素地球化学特征,得出了该区成矿金属物质主要取自基底地层而不是含矿层的新认识。This paper deals systematicaly with the stratigraphical geochemistries of the Middle De- vonian and its underlying basement,especially lead isotopic geochemistries of the lead-zinc deposits in the Xicheng orefield.There are two conclusions can be reached, 1.For the Devonian system,there are not regional enrichemnet strata of ore-forming ele- ments in this area.No ore-forming element had been derived from the Middle Devonian (ore- bearing strata). 2.The basement strata are characterized not only by abundance of ore-forming metals enough to form the deposits,but also has some conditions favourable to activation,migration and accumulation of ore-forming elements.Therefore the basement strata can be considered as main source beds of the lead-zinc deposits.

关 键 词：铅锌矿 矿床 成矿 物质来源 

分 类 号：P618.420.5[天文地球—矿床学]