沉积岩对楚雄盆地砂岩铜矿成矿的控制  

CONTROLS OF SEDIMENTARY ROCK ON SANDSTONE- HOSTED COPPER DEPOSITS IN CHUXIONG BASIN

作　　者：陈根文[1] 夏斌[1] 吴延之[2] 钟志洪[1] 王国强[1] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510650 [2]中南大学资源环境与建筑工程学院,湖南长沙41008

出　　处：《矿物岩石》2002年第3期24-28,共5页Mineralogy and Petrology

基　　金：国家攀登计划预选项目 (编号 :95 -预 -2 5 );国家 973项目 (编号 :G19990 43 2 40 )资助

摘　　要：楚雄盆地砂岩铜矿产于白垩系地层层位中 ,矿床与盆地内的下部含煤建造、中部的红色含铜碎屑岩建造和上部白色膏盐建造关系密切。含矿岩系具有向上变细的剖面结构 ,矿化常形成于不整合界面以上的一定范围内。含矿岩石以细砂岩为主 ,铜矿化与胶结物总量和钙质、硅质胶结物有关 ,并形成于浅色向紫色岩层过渡的氧化还原界面附近。沉积成岩作用对矿床的形成起重要作用。The sandstone-hosted copper deposits of Cretaceous age in the Chuxiong basin were closely related with the lower coaly formation,the middle cupriferous formation and upper gypsum-salt formation.The grain size of the ore-bearing formations became finer upward in the cross section.The copper mineralization formed in certain range above the unconformable contact.Cupriferous rocks are mainly fine-grained.Mineralization is related with calcic and siliceous cements and also with the total content of cements.Ore bodies formed in the vicinity of oxidizing-reducing interface.There is enough evidence to indicate that diagenesis played important role in copper mineralization.

关 键 词：沉积岩 砂岩铜矿床 成岩作用 楚雄盆地 成矿作用 云南 

分 类 号：P618.41[天文地球—矿床学] P588.2[天文地球—地质学]