新疆库鲁克塔格地区地质矿物来源及构造背景研究

Study on the source and tectonic setting of geological minerals in Kuruktag area,Xinjiang

库鲁克塔格地区位于新疆塔里木克拉通东北缘,南天山造山带南缘,该地区经历多期次地质构造活动事件。本文通过收集库鲁克塔格地区矿床的成矿年代学数据,并结合已有资料,探讨了新疆库鲁克塔格地区地质活动及其构造背景。结果显示碎屑矿物年龄主要集中分布在380Ma^440Ma、600Ma^820Ma和1800Ma^2100Ma,记录了库鲁克塔格地区3期构造热事件。年龄在380Ma^440Ma的碎屑矿物可能记录了古生代期间南天山洋向南俯冲的地质构造作用,600Ma^820Ma的碎屑矿物记录了罗迪尼亚超大陆裂解事件,1800Ma^2100Ma的碎屑矿物的存在可能与哥伦比亚超大陆的聚合有关。

Kuruketag area is located in the northeast margin of Tarim Craton and the southern margin of South Tianshan orogenic belt in Xinjiang.In this paper,the geological activities and tectonic setting of the Kuruktag area in Xinjiang are discussed by collecting the metallogenic chronological data of the deposits and combining with the existing data.The results show that the ages of clastic minerals are mainly distributed in 380Ma^440Ma,600Ma^820Ma and 1800Ma^2100Ma,which records three tectonic thermal events in Kuruktag area.The detrital minerals aged 380Ma^440Ma may record the southward subduction of the southern Tianshan ocean during the Paleozoic.The clastic minerals of 600Ma^820Ma record the breakup of Rodinia supercontinent.The existence of clastic minerals at 1800Ma^2100Ma may be related to the aggregation of Columbia supercontinent.