新疆东天山洋板块地质特征与战略性金属矿产成矿规律研究  

Study on Geological Characteristics of Ocean Plate and Metallogenic of Strategic Metal in the East Tianshan of Xinjiang

作　　者：赵同阳 三金柱 刘洋 靳刘圆 韩琼 Zhao Tongyang;San Jinzhu;Liu Yang;Jin Liuyuan;Han Qiong(Xinjiang Academy of Geology research,Urumqi,Xinjiang,830000,China;Xinjiang Natural Resources and Ecological Environment Research Center,Urumqi,Xinjiang,830000,China)

机构地区：[1]新疆维吾尔自治区地质研究院,新疆乌鲁木齐830000 [2]新疆维吾尔自治区自然资源与生态环境研究中心,新疆乌鲁木齐830000

出　　处：《新疆地质》2024年第4期540-549,共10页Xinjiang Geology

基　　金：自治区天山英才青年科技拔尖人才项目(2022TSYCCX0040);自治区重大科技专项中巴走廊及中亚、西亚战略性矿产资源评价数据库建设及潜力评价方法研究项目(2022A03010-5)共同资助。

摘　　要：通过系统梳理新疆东天山地区洋板块地质特征,重构了古老造山带中沟-弧-盆系统,认为研究区显生宙以来地质构造演化主要受控于北天山洋的打开、俯冲、消减、闭合等地质过程。全面分析东天山地区58个成型矿床的成矿特征,提出“地质时代+构造环境+含矿建造+矿种”的成矿系列划分及命名方案,据此对东天山战略性金属矿产成矿规律进行再分析、再认识,划分出元古宙活动大陆边缘环境中与海相沉积变质建造有关的铁矿、早古生代洋内俯冲阶段与岩浆活动有关的铜多金属矿、早泥盆—早石炭世洋俯冲阶段与中酸性岩浆热液活动相关的铁铜多金属矿、晚石炭世—二叠纪洋盆闭合阶段与岩浆-构造活动有关的铁铜镍铅锌金银矿、三叠纪碰撞造山阶段与碱性岩浆热液-构造有关的钛铁金钼钨锂矿等5个成矿系列,结合不同地球动力学背景的优势成矿作用,提出找矿新方向。The trench-arc-basin system in the ancient orogenic belt is reconstructed through systematically research on the geological characteristics of the oceanic plates in the East Tianshan of Xinjiang.It is concluded that the geological tectonic evolution in the study area since the early Paleozoic is mainly controlled by the opening,subduction and closure of the North Tianshan Ocean.The metallogenic characteristics of 58 deposits in the East Tianshan Mountains are comprehensively analyzed,and the metallogenic series division and naming scheme of“geological age+tectonic environment+ore-bearing construction+ore species”is proposed for the first time.Based on this,the metallogenic regularity of strategic metal minerals in the East Tianshan is re-analyzed and re-recognized.The iron ore metallogenic series associated with Marine sedimentary metamorphism in Proterozoic active continental margin environment,the copper polymetallic ore metallogenic series associated with magmatic activity in Early Paleozoic subduction stage,the iron copper polymetallic ore metallogenic series associated with medium acidic magmatic hydrothermal activity in Early Devonian to Early Carboniferous ocean subduction stage,the iron copper nickel lead zinc ore metallogenic series associated with magmatic activity in Late Carboniferous-Permian ocean basin closing stage and Fe-Au-Mo-W-Li ore metallogenic series are related to alkaline magmatic hydrothermal structure in the Triassic collusion-orogenic stage had been classified.Combined with the advantageous mineralization of different geodynamic backgrounds,a new prospecting direction is proposed.

关 键 词：洋板块 战略性矿产 成矿规律 东天山 

分 类 号：P612[天文地球—矿床学]