广西大厂96号矿体的成矿元素地球化学特征与成因  

Geochemical Characteristics of Ore-Forming Elements and Ore Genesis of No.96 Ore-body in the Dachang Deposit,Guangxi

作　　者：范森葵[1,2] 王登红[3] 梁婷[4] 吴德成 韦可利 周鸿军 黄惠明 屈文俊[7] 

机构地区：[1]中南大学地学与环境工程学院,长沙410083 [2]广西215地质队,广西柳州545000 [3]中国地质科学院矿产资源研究所/国土资源部成矿作用与资源评价重点实验室,北京100037 [4]长安大学地球科学与国土资源学院,西安710054 [5]广西有色金属集团公司,南宁530000 [6]广西华锡集团股份有限公司,广西柳州545000 [7]国家地质实验测试中心无机分析研究室,北京100037

出　　处：《吉林大学学报（地球科学版）》2010年第4期781-790,共10页Journal of Jilin University：Earth Science Edition

基　　金：国家科技支撑计划项目(2006BAB01B03);国家危机矿山专项项目(200545022)

摘　　要：大厂96号矿体是近年来在我国危机矿山接替资源勘查项目中发现的最大单体锌多金属矿体,产于巴力—龙头山矿床与拉么矿床之间,埋深600～800m,在巴力区下部以锡多金属为主,往北东至黑水沟—大树脚区过渡为锌铜矿体,含锡甚低,具有明显的特殊性。锌和锡含量自西向东呈降低趋势,相反铜有富集趋势,锑与铅仅在浅部富集,往深部愈近岩体,银富集程度愈趋于降低。主要成矿元素随着深度的加大,其含量呈现波状起伏变化而不是截然变化。96号矿体北段锌铜矿体有较为明显的充填交代特征,不管是锡多金属矿段还是锌铜矿段都产于同一层位的层间破碎带中,其成因与长坡—铜坑、拉么矿床一样,属燕山晚期岩浆热液交代成矿作用的产物。No.96 ore-body in Dachang ore field is the biggest zinc-polymetallic ore-body discovered during the exploration projects in exhausted reserves mines in China. It’s located between the Bali-Longtoushan deposit and Lamo deposit, with the depth of 600-800 m. The ore-body is rich in tin and polymetallic elements in the Bali area, toward the northeast, becomes the copper-zinc deposit, almost without tin, in the Heishuigou area. From west to east, contents of both zinc and tin decrease, while, that of copper increases. Antimony and lead are enriched only in the near surface, downward near to the granite, the grade of silver decreases. The spatial distribution of main elements are continously fluctuated. The northern part of No.96 ore-bdoy is characterized by metasomatism-filling zinc-copper mineralization. Both the tin-polymetallic and the zinc-copper mineralization are distributed in the fault intra layers within the same formation. It can be concluded that the No.96 ore-body, similar to the Changpo-Tongkeng and Lamo deposit, is formed by magmatic hydrothermal metasomatism during the Late Yanshanian stage.

关 键 词：广西大厂矿田 96号矿体 成矿元素 地球化学 

分 类 号：P618.4[天文地球—矿床学]