西昆仑-喀喇昆仑造山带锂矿成矿特征与成矿规律初探

Geological characteristics and metallogenic regularity of the lithium deposit in West Kunlun-Karakoram orogenic belts,Xinjiang

西昆仑-喀喇昆仑造山带中生代花岗伟晶岩相当发育,主要分布于麻扎-康西瓦缝合带以南的喀喇昆仑造山带,构成了西自木吉—塔什库尔干,东到大红柳滩长达600 km的喀喇昆仑稀有金属成矿带。通过多年的研究,本文对西昆仑-喀喇昆仑造山带37处稀有金属矿床(点)进行了全面系统的梳理,认为喀喇昆仑-喀喇昆仑造山带表现为“西铍东锂”的格局,稀有金属成矿年龄集中213~206 Ma。将喀喇昆仑造山带稀有金属成矿带划分为木吉-塔什库尔干稀有金属成矿亚带、赛图拉-大红柳滩稀有金属成矿亚带,从西向东可划定4个矿化集中区:木吉-布伦口稀有金属集中区、塔什库尔干-塔吐鲁沟稀有金属矿化集中区、康西瓦稀有金属矿化集中区、大红柳滩-白龙山稀有金属矿化集中区。同时,认为西昆仑-喀喇昆仑造山带西段下一阶段的找矿可放在西合休南锂铍找矿远景区、阿然保泰铍找矿远景区、木吉西锂铍找矿远景区。

The Mesozoic granitic pegmatites of the West Kunlun-Karakoram orogenic belt are remarkably welldeveloped,mainly distributed within the Karakoram orogenic belt.This belt,located south of the Maza Kangxiwa suture zone,stretches for an impressive 600 km from Muji Taxkorgan in the west to Dahongliutan in the east,forming a significant Karakoram rare metal mineralization belt.This study presents a comprehensive and systematic analysis of 37 rare metal deposits hosted within the West Kunlun-Karakoram orogenic belt.The Karakoram orogenic belt exhibits a striking spatial pattern,with beryllium deposits dominating the west and lithium deposits concentrated in the east.The age of rare metal mineralization in this region is primarily clustered between 213 and 206 Ma.The Karakoram orogenic belt can be subdivided into two distinct sub-belts:the Muji-Taxkorgan rare metal mineralization sub-belt and the Saitura-Dahongliutan rare metal mineralization sub-belt.From west to east,four rare metal mineralization concentration areas can be identified:Muji-Bolunkou,Tashkurgan-Tatulugou,Kangxiwa,and Dahongliutan-Bailongshan.This research suggests that the next stage of mineral exploration in the western section of the West Kunlun-Karakoram region can be focused on the Xihexiu South lithium beryllium exploration section,the Aranbaotai beryllium exploration section,and the Mujixi lithium beryllium exploration section.