西昆仑塔什库尔干地区铁矿找矿综合信息研究及勘查区圈定  

Integrated prospecting information study and exploration area optimization for iron deposit in the Taxkorgan Region,Western Kunlun

作　　者：李辉 王双 李笑龙 李斌 杜玉梅 呼冬强 李玉飞 郝延海[1] 何福宝 魏俊浩[2] LI Hui;WANG Shuang;LI Xiaolong;LI Bin;DU Yumei;HU Dongqiang;LI Yufei;HAO Yanhai;HE Fubao;WEI Junhao(The Second Geological Brigade of Xinjiang Bureau of Geology and Mineral Resources,Kashi 844000,Xinjiang,China.2.School of Earth Resources,China University of Geosciences,Wuhan 430074,Hubei,China;School of Mining Engineering and Geology,Xinjiang Institute of Engineering,Urumqi 830023,Xinjiang,China)

机构地区：[1]新疆地质矿产勘查开发局第二地质大队,新疆喀什844000 [2]中国地质大学(武汉)资源学院,湖北武汉430074 [3]新疆工程学院矿业工程与地质学院,新疆乌鲁木齐830023

出　　处：《矿产勘查》2024年第S2期485-497,共13页Mineral Exploration

摘　　要：西昆仑塔什库尔干铁矿带是中国西部地区重要的铁矿带之一,目前已发现铁矿床(点)30余处。在对塔什库尔干地区地质背景分析基础上,剖析赞坎铁矿床和喀来子钡-铁矿床地质和成矿特征,总结沉积变质型铁矿和喷流沉积型铁矿的成矿模式和控矿因素。两种类型铁矿的产出严格受地层控制,并呈层状和条带状产出于特定时代和岩性的层位中。沉积变质型铁矿控矿地层为古元古界布伦阔勒群,喷流沉积型铁矿的控矿地层为下寒武统。岩浆岩和构造对铁矿的控制作用主要表现为后期改造破坏和铁矿局部富集。通过对铁矿形成的地质特征和控矿因素分析,结合磁异常和遥感铁异常等综合成矿信息,认为研究区东南部具有较好的成矿条件并圈定铁矿勘查区。勘查区出露地层主要为古元古界布伦阔勒群,遥感强铁化蚀变发育广泛。勘查区内分布C-99-13正磁异常,△T最高值为309nT。古元古界布伦阔勒群地层、航磁异常和遥感铁化蚀变三者的套合关系显示勘查区具有较好的找矿潜力,可作为下一步找矿重点工作区。The Taxkorgan Iron Ore Belt in the Western Kunlun region of Xinjiang is one of the important iron ore belts in the western part of China,with over 30 identified iron deposits.Based on the geological background analysis of the Taxkorgan region,the geological and ore-forming characteristics of the Zankan and Kalaizi iron deposits are analyzed.The mineralization model and controlling factors of meta-sedimentary iron deposit and sedimentary exhalative iron deposit are summarized.The production of both types of iron deposits is controlled by stratigraphy and occurs as stratiform structure at specific periods and lithology.The controlling strata for metasedimentary iron deposits are the Upper Proterozoic Bulunkuole Group,while for sedimentary exhalative iron deposits,the controlling strata are the Upper Cambrian.The control by magmatic rocks and structures on ore bod⁃ies is mainly manifested in later alteration and destruction,leading to localized enrichment of iron ore.Through the analysis of the geological characteristics and controlling factors of iron deposit,coupled with comprehensive information such as aeromagnetic anomalies and remote sensing iron anomalies,it is considered that the southeastern part of the study area has favorable ore-forming conditions,and an iron ore exploration area is delineated.The strata is mainly the Upper Proterozoic Bulunkuole Group in the iron ore exploration area,with widespread development of remote sensing iron anomalies.The C-99-13 positive aeromagnetic anomaly distributes in the iron ore exploration area,with the maximum△T value reaching 309 nT.The overlapping relationship among the Upper Proterozoic Bulunkuole Group strata,aeromagnetic anomalies,and remote sensing iron anomaly indicates that the southeastern part of the study area has good mineral exploration potential.

关 键 词：铁矿床 控矿因素 航磁异常 遥感铁化蚀变 勘查区优选 

分 类 号：P596[天文地球—地球化学]