内蒙古额济纳旗辉森乌拉西金多金属矿物化探特征及找矿潜力分析  

Analysis of Geochemical Exploration Characteristics and Exploration Potential of Huisen Ulassi Gole Polymetallic Mineral in Ejin Banner,Inner Mongolia

作　　者：王连芳[1] 刘福胜 赵彦博[1] Wang Lianfang;LIU Fusheng;ZHAO Yanbo(Inner Mongolia Land Resources Exploration and Development Co.,Ltd.,Hohhot,Inner Mongolia 010020;China Coal Geology Group Co.,Ltd.,Beijing 100040)

机构地区：[1]内蒙古国土资源勘查开发有限责任公司,内蒙古呼和浩特010020 [2]中煤地质集团有限公司,北京100040

出　　处：《中国煤炭地质》2023年第11期77-80,共4页Coal Geology of China

基　　金：内蒙古地勘基金项目“内蒙古额济纳旗呼伦西白地区1∶2.5万战略性矿产调查”([2020]科研-02)。

摘　　要：内蒙古额济纳旗辉森乌拉西矿区位于华北板块西缘与兴蒙造山带接触部位的阿拉善地块,雅干复背斜南部,南临居延海坳陷,岩浆活动频繁,区域上北西、北东向断裂发育。研究区内北东向断裂构造既是主要的控岩、控矿构造,也是热液活动的主要通道;含矿岩体为上二叠统哈尔苏海组变质岩屑石英砂岩,片理化强烈,岩石普遍具绢云母化、绿泥石化,褐铁矿化、硅化较强。研究区内1∶5万航磁异常展布形态与区内北东向断裂构造方向一致,局部弱磁异常与矿化蚀变密切相关,可作为间接找矿标志;1∶2.5万土壤地球化学测量结果显示,金、铌、镧各元素异常吻合好,形成了北东向异常带,具有多处浓集中心,浓度分带明显。通过对研究区所处区域地质背景、物化探异常特征及矿床地质特征进行研究,认为该区的成矿条件优越,对寻找金、稀有元素铌及稀土多金属矿产具有很大的潜力。The Huisen Ulassi mining area in Ejin Banner,Inner Mongolia is located in the Alxa block at the contact area between the western edge of the North China Plate and the Xingmeng Orogenic Belt.It is situated in the southern part of the Yagan anticline and adjacent to the Juyanhai Depression to the south.Magmatic activity is frequent,and northwest and northeast trending faults are developed in the region.The northeast trending fault structure within the research area is not only the main rock and ore controlling structure,but also the main channel for hydrothermal activity;The ore bearing rock mass is the metamorphic lithic quartz sandstone of the Upper Permian Harbin Suhai Formation,with strong schistosity.The rocks are generally characterized by sericitization and chloritization,as well as strong limonitization and silicification.The distribution pattern of 1∶50000 aeromagnetic anomalies in the study area is consistent with the direction of the northeast trending fault structure.Local weak magnetic anomalies are closely related to mineralization and alteration,and can be used as indirect prospecting indicators;The results of 1∶25000 soil geochemical measurements show that the anomalies of gold,niobium,and lanthanum are well matched,forming a northeast anomaly zone with multiple concentration centers and clear concentration zoning.By studying the geological background,geophysical and geochemical anomalies,and geological characteristics of the deposit in the study area,it is believed that the ore-forming conditions in this area are superior,and it has great potential for searching for gold,rare element niobium,and rare earth polymetallic minerals.

关 键 词：物化探特征 金多金属矿 辉森乌拉西 

分 类 号：P618.51[天文地球—矿床学]