柴达木盆地南缘祁漫塔格—鄂拉山地区斑岩-矽卡岩矿床地质  

Geology of porphyry and skarn type copper polymetallic deposits in southern margin of Qaidam Basin

作　　者：吴健辉[1] 丰成友[2] 张德全[2] 李进文[2] 佘宏全[2] 

机构地区：[1]湖北国土资源职业学院,湖北荆州434000 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《矿床地质》2010年第5期760-774,共15页Mineral Deposits

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(编号:K0901);"十一五"国家科技支撑计划课题(编号:2006BAB01A06);国土资源部百名优秀青年科技人才计划的联合资助

摘　　要：柴达木盆地南缘祁漫塔格-鄂拉山地区发育斑岩-矽卡岩型铜多金属矿床,成矿主元素为Cu、Mo、Pb、Zn,大部分矿床伴生Au、Ag。斑岩型和矽卡岩型矿(化)体共生于同一个矿区之中,是这类矿床的一个重要特点。与成矿有关的侵入体是印支期的中酸性小岩体,它们具有浅成-超浅成和高侵位等特点。斑岩-矽卡岩矿床的成岩年龄和成矿年龄一致,形成于中三叠世至晚三叠世。它们是东昆仑造山带晚碰撞造山阶段壳-幔作用(幔源岩浆底侵-岩浆混合)的产物,与东昆仑地区这一时期的矽卡岩型铁多金属矿床、热液脉状多金属矿床,以及造山型金矿床共同构成了一个矿床成矿系列。Copper polymetallic deposits of porphyry and skarn type are well developed in southern margin of the Qaidam Basin,whose ore-forming elements are mostly copper,molybdenum,lead and zinc with accompanying elements of gold and silver. A prominent feature of such ore deposits is that mineralizations of porphyry type and skarn type coexist in the same ore deposit. Intrusive rocks related to mineralization are Indosinian intermediate-acid small intrusive bodies assuming hypabyssal and high-level emplacement features. Rock-forming and ore-forming ages of these deposits are consistent,being Middle to Late Triassic. They were formed under the crust-mantle interaction during the late collision of East Kunlun orogeny,forming a metallogenic series with skarn-type iron polymetallic deposits and hydrothermal veinlike polymetallic deposits and orogenic gold deposits of this stage.

关 键 词：地质学 斑岩矿床 矽卡岩矿床 柴达木盆地南缘 

分 类 号：P618.41[天文地球—矿床学] P618.65[天文地球—地质学]