大兴安岭中南段典型银锡多金属矿床成矿条件与找矿潜力  

Ore-Forming Conditions and Exploration Potential of Typical Ag-Sn Polymetallic Deposits in the Central-Southern Da Hinggan Mountains

作　　者：张浩[1,2] 王新利[3] 刘道荣 孙引强 程幕利 ZHANG Hao;WANG Xinli;LIU Daorong;SUN Yinqiang;CHENG Muli(School of Civil and Resources Engineering,University of Science and Technology(Beijing),Beijing 100083;China Nonferrous Metal Mining(Group)CO.,LTD,Beijing 100029;China National Nonferrous Metals Industry&Technology Development CO.,LTD,Beijing 100038;Zhejiang Geological Prospecting Institute of China Chemical Geology and Mine Bureau,Hangzhou,Zhejiang 310002;243 Team,China Nuclear Geology,Chifeng,Inner Mongolia 024000;Inner Mongolia Tenth Geological Mineral Exploration and Development institute,Chifeng,Inner Mongolia 024000)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]中国有色矿业集团有限公司,北京100029 [3]中国有色金属实业技术开发有限公司,北京100038 [4]中化地质矿山总局浙江地质勘查院,浙江杭州310002 [5]核工业二四三大队,内蒙古赤峰024000 [6]内蒙古自治区第十地质矿产勘查开发院,内蒙古赤峰024000

出　　处：《地质与勘探》2021年第1期39-52,共14页Geology and Exploration

摘　　要：大兴安岭中南段银锡多金属成矿带位于中亚造山带东部,近年来找矿成果丰硕。在对边家大院、拜仁达坝-维拉斯托、双尖子山3个银锡多金属矿床的成矿特征进行系统分析的基础上,探讨本区银锡多金属矿成矿条件与找矿潜力。结果显示,本区银锡多金属成矿与花岗质岩浆侵入密切相关,成岩与成矿具多期多阶段特征,主要发生于早白垩世,峰值为130~150 Ma。成矿岩体多具高硅、低镁、富碱的特征,形成于蒙古-鄂霍茨克洋和古太平洋两大构造体系叠加影响的伸展背景。银锡多金属成矿受地层-构造-岩浆岩三位一体联合控制,成矿条件优越,找矿潜力较大。在边家大院矿床西区的深部和外围以及北大山、磨盘山岩体的周边,有找寻锡多金属矿床的潜力。借鉴大兴安岭北段的找矿经验,应注重在本区中生代火山岩中找寻银铅锌多金属矿床。The Ag-Sn polymetallic metallogenic belt of the central-southern Da Hinggan Mountains is located in the east part of the Central Asia Orogenic belt,where a lot of ore prospecting results have been obtained in recent years.Based on systematic analysis of metallogenic characteristics for three polymetallic deposits,including Bianjiadayuan,Bairendaba-Weilasituo,and Shuangjianzishan,this work further illuminates the mineralization conditions and prospecting potential in this region.Results show that the Ag-Sn polymetallic mineralization is closely associated with granitic magmatism.The diagenesis and mineralization are multiperiodic,and mainly occurred in the Early Cretaceous with a peak age of 130~150 Ma.The ore-related granites characterized by high silicon and alkali and low magnesium were formed in an extensional setting associated with the Mongolia-Okhotsk Ocean and the Paleo-Pacific Ocean tectonic systems.Ag-Sn polymetallic mineralization is controlled by the trinity of strata,structure,and magmatic rock and has superior metallogenic conditions and large prospecting potential.Ag-Sn polymetallic resources may be present in the deep subsurface and surroundings of the western Bianjiadayuan deposit and the peripheries of the Beidashan and Mopanshan intrusions.Based on the prospecting experience in the north of the Da Hinggan Mountains,much attention should be paid to exploration of silver-lead-zinc polymetallic deposits in Mesozoic volcanic rocks in this district.

关 键 词：银锡多金属矿床 成矿规律 控矿因素 大兴安岭中南段 

分 类 号：P618.4[天文地球—矿床学]