新疆滴水砂岩铜矿床特征及成因探讨  

Geological Characteristics and Metallogenesis of Dishui Sandstone-type Copper Deposit,Xinjiang

作　　者：韩文文[1] 陶晓风[1] 岳相元[1] 

机构地区：[1]成都理工大学地球科学学院,成都610059

出　　处：《华南地质与矿产》2011年第3期184-190,220,共8页Geology and Mineral Resources of South China

摘　　要：新疆滴水砂岩型铜矿床位于塔里木盆地北部边缘,库车前陆坳陷盆地。铜矿体赋存于一套河湖交替相的红色含膏盐碎屑砂岩建造中。矿床有三个主要含矿层,储量>40×104t。该砂岩铜矿床为典型的层控型矿床,经历了"沉积-成岩-改造"成矿模式。在沉积期具有生物、化学双重成矿作用,经过后期成矿物质的活化迁移后生叠加改造再富集过程。铜矿体主要沉积在深湖相-三角洲相-河流冲刷相交替的多重沉积环境,该沉积地层是有效的金属沉淀地球化学障(矿捕层),是富含有机质的还原障,富硫化物的硫化障。Dishui sandstone-type copper deposit,Xinjiang province,locates at Kuche foreland fault basin which lays northern margin of Tarim Basin.The copper ore-bodies are occurred in ineter-bedded lacustrine and fluvial gypsum-bearing sandstone formations,and are composition of three main ore-bearing strata,which contains more than 40×104 t copper reserve in total.Dishui copper deposit is a typical strata-bound deposit which in formed by ＂sedimentation-diagenesis-alteration＂ process： the ore source is concentrated by biological and chemical process in the sedimentary stage;and then the ore-forming materials are removed to the favorable space in the diagenesis process;lastly,the ore-bodies are formed by re-enriched process in the alteration stage.Copper ore-bodies are occurred in multiple sedimentary environment of inter-bedded deep-lake facies,delta facies and fluvial facies,where existing the effective metal precipitation geochemical barrier,organic material-rich reducing barrier and sulfide-rich sulfuration barrier.

关 键 词：砂岩铜矿 地质特征 层控矿床 矿床成因 新疆滴水 

分 类 号：P618.41[天文地球—矿床学]