内蒙古阿鲁科尔沁旗胜利大队铅锌多金属矿地质特征及成矿时代  

Geological characteristics and metallogenic age of lead-zinc polymetallic deposit in Shengli Dadui of Ar Horqin Banner,Inner Mongolia

作　　者：李伟[1,4] 崔育菘 张渝金 张超[1,4] 刘世峰 杜继宇[1,4] LI Wei;CUI Yusong;ZHANG Yujin;ZHANG Chao;LIU Shifeng;DU Jiyu(Shenyang Center of China Geology Survey,Shenyang 110034,Liaoning,China;Liaoning Geological and Mineral Survey Institute Co.,Ltd.,Shenyang 110031,Liaoning,China;Liaoning Technical University,Fuxin 123099,Liaoning,China;Northeast Geological S&T Innovation Center of China Geological Survey,Shenyang 110034,Liaoning,China)

机构地区：[1]中国地质调查局沈阳地质调查中心,辽宁沈阳110034 [2]辽宁省地质矿产调查院有限责任公司,辽宁沈阳110031 [3]辽宁工程技术大学矿业学院,辽宁阜新123099 [4]东北地质科技创新中心,辽宁沈阳110034

出　　处：《矿产勘查》2024年第12期2207-2215,共9页Mineral Exploration

基　　金：中国地质调查局项目(DD20240034-02);辽宁省博士科研启动基金项目(2024-BS-302);中国地质调查局东北地质科技创新中心区创基金项目(QCJJ2023-25)联合资助。

摘　　要：胜利大队铅锌多金属矿床位于林西—突泉铅锌银多金属成矿亚带上,为了研究该矿床的地质特征及成矿时代,本文对该矿床进行了矿产地质调查、岩相学观察及年代学研究,结果表明:矿体赋存于晚古生代林西组地层与燕山期二长花岗岩接触带上,矿体呈脉状,北北东向断裂为主要的控矿构造,控制了矿化蚀变带的展布方向。围岩蚀变主要有硅化、绿帘石化、绿泥石化、高岭土化及黄铁矿化等。对矿床成因的初步分析,认为胜利大队铅锌多金属矿床的成因类型为热液充填型脉状矿床。利用激光剥蚀等离子体质谱(LA-ICP-MS)方法对成矿岩体中锆石进行U-Pb测年,获得其侵位时代为(131.1±1.4)Ma,代表了区域早白垩纪早期的成矿事件,为区域找矿勘查提供参考依据。Shengli Dadui Pb-Zn polymetallic deposit is located in Linxi-Tuquan Pb-Zn-Ag polymetallic metallogenic sub-belt.In order to study the geological characteristics and metallogenic age of the deposit,a mineral geological survey,petrographic analysis,zircon U-Pb geochronology petrographic analysis were conducted.And the following key observations have been made:The ore body is located at the contact zone between the Late Paleozoic Linxi Formation and the Yanshanian biotite granite;The ore body is vein-shaped,with a NNE-trending fault as the primary ore-controlling structure,which controls the distribution direction of the alteration zones;Wall rock alteration mainly includes silicification,epidotization,chloritization,kaolinization and pyritization;Based on the preliminary analysis of the genesis of the deposit,it is considered that the genetic type of Shengli Dadui Pb-Zn polymetallic deposit is hydrothermal filling vein deposit;Zircon U-Pb dating by LA-ICP-MS method shows that the age of rock mass is(131.1±1.4)Ma.This represents an early Cretaceous metallogenic event in the region and provides a reference for regional mineral exploration and prospecting.

关 键 词：地质特征 成矿时代 二长花岗岩 胜利大队铅锌多金属矿床 

分 类 号：P617[天文地球—矿床学]