新疆北山地区清白山矿集区剥露史及对矿产保存的制约  

Exhumation history of qingbaishan ore concentration district in eishan area of Xinjiang and its constraints on mineral preservation

作　　者：张文高[1] 陈正乐[1] 郑利宏 李季霖 刘博 赵同阳 周振菊[1] 闫巧娟 Zhang Wengao;Chen Zhengle;Zheng Lihong;Li Jilin;Liu Bo;Zhao Tongyang;Zhou Zhenju;Yan Qiaojuan(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing,100081,China;China Gold Science and Technology Co.Ltd,Beijing,100176,China;Xinjiang Institute of Geological Survey,Urumqi,Xinjiang,830000,China)

机构地区：[1]中国地质科学院地质力学研究所自然资源部古地磁与古构造重建重点实验室,北京100081 [2]中国黄金集团科技有限公司,北京100176 [3]新疆维吾尔自治区地质调查院,新疆乌鲁木齐830000

出　　处：《新疆地质》2022年第1期78-84,共7页Xinjiang Geology

基　　金：国家科技支撑计划项目(2018YFC0604005);国家自然科学基金项目(41902214);中国地质调查局项目(DD20190161);中国地质科学院基本科研业务费项目(DZLXJK201904)联合资助。

摘　　要：新疆北山地区清白山矿集区位于中亚造山带南缘东天山造山带与北山造山带交界部位,近年来陆续发现一系列多金属矿产,成矿潜力巨大。研究从分析矿集区剥蚀程度的角度,以矿集区内与成矿关系密切的花岗岩体为研究对象,利用磷灰石裂变径迹技术,结合温度-时间热史模拟反演,推测矿集区的剥蚀程度,探讨清白山矿集区多金属矿产深部的找矿潜力。研究结果显示,样品裂变径迹年龄集中在((50±5)~(84±5))Ma之间,温度-时间反演模拟结果表明,北山地区在晚白垩世经历过快速隆升过程。100 Ma以来,清白山矿集区剥蚀厚度累计约2.85 km,结合矿集区矿产分布特征,认为研究区深部还有较大找矿潜力。The Qingbaishan ore-concentration district in the Beishan area of Xinjiang is located at the junction of the eastern Tianshan orogenic belt and the Beishan orogenic belt on the southern margin of the Central Asian orogenic belt.In recent years,a series of polymetallic minerals have been discovered in this area,and it indicates that it has great metal-logenic potential.In this study,from the perspective of analyzing the denudation degree of the ore concentration area.The granite body closely related to mineralization in the ore concentration area is taken as the research object.Using apatite fission track technology and temperature time thermal history simulation inversion,the denudation degree of the ore con-centration area is speculated,and the deep prospecting potential of polymetallic minerals in qingbaishan ore concentra-tion area is discussed.The results show that the fission track ages of the samples range from(50±5)Ma to(84±5)Ma.The temperature time inversion simulation results show that the Beishan area of Xinjiang experienced a rapid uplift pro-cess in the late Cretaceous.Since 100 Ma,the denudation thickness of Qingbaishan ore concentration district has accu-mulated about 2.85km.Combined with the mineral distribution characteristics of the ore concentration area,it is consid-ered that there is still great prospecting potential in the deep part of the study area.This conclusion has a certain refer-ence value for the deployment of prospecting and exploration in Qingbaishan ore concentration district.

关 键 词：磷灰石 裂变径迹 热年代学 矿产保存 清白山矿集区 

分 类 号：P619.213[天文地球—矿床学]