西秦岭礼岷金矿带李坝群含金浊积岩建造地球化学特征  

Geochemical Characteristics of Liba Group Gold-Bearing Turbidite Formation in Lixian-Minxian Gold Mineralized Zone, West Qinling, Gansu Province

作　　者：孙省利[1] 宋春晖[1] 武安斌[1] 袁明坤 高北奎 

机构地区：[1]甘肃有色地质研究所,兰州大学

出　　处：《沉积学报》1995年第4期145-152,共8页Acta Sedimentologica Sinica

基　　金：甘肃省自然科学基金

摘　　要：本文通过对李坝群含金浊积岩建造中金及其它微量元素的分布、地球化学特征及与金矿成因的关系研究，结果表明，李坝群含金浊积岩建造明显富集Ａｕ、Ａｓ、Ｓｂ、Ｂｉ和铁族元素Ｃｏ、Ｎｉ、Ｃｒ、Ｖ，且具有较高的ＡＵ／Ａｇ比值。李坝群含金浊积岩建造是衍生含金建造，对于金成矿来说，并非是主要的矿源层，而是赋矿岩系。The distribution of gold, geochemical features of trace elements in the Liba group goldbearing turbidite formation and their relationship with gold metalisation have been studied in detail. The results show that Liba group gold-bearing turbidite formation is rich in An, As,Sb, Bi and Cr, Ni, Co and V, and has high ratios of An/Ag and An/As, but it is depleted in Hg, Sr and Ba. Contents of As, Bi, Ni, Mn, Ti, Cr, V and ratios of Au/Ag, Au/ As and As/Sb gradually increase from D2Lb1 to D2Lb3, on the contrary, contents of Sb, Sb+Bi+Hg and ratios of Co/Ni and Cr/Ni reduce by degrees. R-type cluster analysis of trace elements in Liziyuan group, gold-bearing turbidite formation and Liba ore-bearing faults indicates that they have common elements association which are Ni, Co, Cr and V, and ore-forming elements in the Liba gold mine inherit obviously components in the Liba gold-bearing turbidite formation and Liziyuan group. The Liziyuan group is the primary gold-bearing formation which consists mainly of basic volcanic rocks with high gold abaundance. The Liba group goldbearing turbidite formation is a derivative gold-bearing formation. The Liba group gold-bearing formation is not main gold source rocks, but gold host rocks.

关 键 词：金矿床 含金 浊积岩 地球化学 矿床沉积学 

分 类 号：P618.510.4[天文地球—矿床学]