新疆祁漫塔格地区阿尼亚拉克钨铜矿成矿地质特征及找矿意义

新疆阿尼亚拉克钨铜矿区位于柴达木微板块之祁漫塔格古生代复合沟弧带，该带为W-Sn-Pb-Zn-Fe-Cu-多金属矿带。矿床的赋矿地层为蓟县系狼牙山组和青白口系丘吉东沟组碎屑岩-碳酸盐岩建造，含矿岩性一为条带状绿帘石-透辉石矽卡岩及矽卡岩化大理岩；另一种为条带状云英岩化变石英砂岩和变粉砂岩。矿体主要受地层和侵入体接触带的控制，形态多呈层状、透镜状和脉状。围岩蚀变主要有矽卡岩化（包括石榴子石化、透辉石化、透闪石化、阳起石化、符山石化、硅灰石化、绿帘石化）、云英岩化、硅化、黄铁矿化等。阿尼亚拉克钨铜矿是以蓟县系狼牙山组和青白口系丘吉东沟组为赋矿岩系，以印支晚期二长花岗岩为热动力源，且受岩体与灰岩接触带和近EW向层间构造破碎带控制的岩浆中-高温热液交代充填矽卡岩-云英岩型钨铜矿床。阿尼亚拉克钨铜矿床的发现对祁漫塔格地区钨锡、铅锌、铁、金铜成矿远景区的地质找矿具有重要意义。

Metallogenical and geological characteristics of Aniyalak W-Cu deposit and the significance to ore prospecting in Qimantag area

Aniyalak W-Cu deposit isocated at the Palaeozoic Qimantag composite trench-arcb belt of Qaidam microplate of Tarim-North China plate. The belt is a W-Sn-Pb-Zn-Fe-Cu poly-metal ore belt. The ore deposit is hosted by detrital-carbonate rock of Langyashan Formation of Jixian System and Qiujidonggou Formation of Qingbaikou System. The banded epidote-diopside skarn and skarnized marble banded greisenized meta-quartz-sandstone and meta-siltstone are the two lithologies in which the ore occur. Ore bodies are controlled by contact zone of the intrusive body and the surrounding strata occurring in multi-layered, lenticular or vein-like form. Wall rock alteration includes mainly skarnization (garnetization, tremolitization, actinoltization, epidotization, silicification, vesuvianitization, wallostonitization, pyritization etc.), greisenization, silicification and pyritization etc. The deposit is a meso-hypothermal magmatic W-Cu deposit with the ore hosted by Langyashan Formation of Jixian System and Qiujidonggou Formation of Qingbaikou System and heat dynamics derived from Late Hercynian Indosinian monzonitic granite and the ore controlled by contact zone of the granite and the surroundig strata and the nearly EW interformation fault. Discovery of the deposit is of significance to W-Sn, Pb-Zn, Fe and Au-Cu ore prospecting in Qimantag area.