河南骆驼山硫多金属矿床铟的分布富集规律  

Distribution and enrichment characteristics of indium in the Luotuoshan sulfur polymetallic deposit,Henan Province

作　　者：张荣臻[1,2] 鲍波 郭波 韩江伟 李开文 云辉 朱红运 李敏 孙焱焱 ZHANG Rongzhen;BAO Bo;GUO Bo;HAN Jiangwei;LI Kaiwen;YUN Hui;ZHU Hongyun;LI Min;SUN Yanyan(China University of Geosciences(Beijing),Beijing 100083,China;Henan Institute of Geology,Zhengzhou,Henan 450001,China;Research Center for Petrogenesis and Mineralization of Granitoid Rocks,China Geological Survey,Wuhan,Hubei 430205,China;Wuhan Center,China Geological Survey(Central South China Innovation Center for Geosciences),Wuhan,Hubei 430205,China;Luanchuan Longyu Molybdenum Industry Co.,LTD,Luoyang,Henan 471542,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]河南省地质研究院,河南郑州450001 [3]中国地质调查局花岗岩成岩成矿地质研究中心,湖北武汉430205 [4]中国地质调查局武汉地质调查中心(中南地质科技创新中心),湖北武汉430205 [5]栾川龙宇钼业有限公司,河南洛阳471542

出　　处：《地质学报》2023年第8期2547-2562,共16页Acta Geologica Sinica

基　　金：河南省地质矿产勘查开发局青年科技创新项目(编号豫地矿青科创[2021]KC-8);河南省地质矿产勘查开发局地勘项目(编号豫地矿[2022]02号);矿床地球化学国家重点实验室开放研究基金(编号202206);国家自然科学基金项目(编号92062102,41802100)联合资助的成果。

摘　　要：骆驼山硫多金属矿床位于华北陆块南缘栾川矿集区,是以硫和锌为主的大型有色金属矿床,并伴生有丰富的In、Cd等资源。本文以铟为重点研究对象,在详细的野外地质调查和室内显微观察的基础上,应用ICP-MS、LA-ICP-MS等分析测试手段,对骆驼山矿床不同类型的围岩、矿石及不同矿物中的In、Zn、Sn、Cd、Cu等元素的含量、分布特征及相关性开展研究,以揭示铟的分布富集规律。结果表明,骆驼山矿床角岩和矽卡岩具有较高的In背景值,In主要以类质同象的形式赋存在铁闪锌矿(平均含量276.79×10^(-6))和黄铜矿(平均含量89.73×10^(-6))中,主要由磁黄铁矿、闪锌矿和黄铜矿组成的致密块状矿石(In平均含量63.90×10^(-6))具有重要的综合利用价值。In与其他成矿物质一样可能来自深部岩浆,其含量在垂向上的分布总体表现出近矽卡岩端较远矽卡岩端高的特点,富集程度受温度控制明显。矿石中In的富集与Zn、Cu、Cd呈正相关关系,与Sn关系不明显。In在铁闪锌矿中与Zn、Cu、Cd含量呈正相关关系,在黄铜矿中与Zn、Sn含量呈弱正相关关系,In在黄铜矿中的富集替换机制有待进一步研究。Located in Luanchuan metallogenic concentration area in the southern margin of north China Craton,the Luotuoshan sulfide polymetallic deposit is a large-scale non-ferrous metal deposit mainly composed of sulfur and zinc,accompanied by abundant In,Cd and other resources.In this paper,indium is taken as the key research object.Based on detailed field geological survey and microscopic observation,ICP-MS,LA-ICP-MS and other analysis and test methods are applied to study the contents,distribution characteristics and correlation of In,Zn,Sn,Cd,Cu and other elements in different types of surrounding rocks,ores and different minerals of Luoshuoshan deposit.It aims to reveal the distribution and enrichment rule of indium.The results show that the hornite and skarn of Luotuoshan deposit have high background value of In,which mainly occurs in marmatite(average 276.8×10^(-6))and chalcopyrite(average 117.7×10^(-6))in the form of isomorphism,which is closely related to the dense massive ore(average 63.9×10^(-6)).Like other ore-forming materials,In may mainly comes from the deep magma,and its vertical distribution shows that the content of In in near skarn area is higher than that in areas distant from skarn area,and its enrichment degree is obviously controlled by temperature.The concentration of In in the ore was positively correlated with Zn,Cu,Cd,but not with Sn.In in marmatite was positively correlated with Zn,Cu,Cd contents,while In in chalcopyrite shows a weak positive correlation with Zn and Sn contents,the enrichment and replacement mechanism of In in chalcopyrite needs to be further studied.

关 键 词：骆驼山 铁闪锌矿 铟 富集规律 

分 类 号：P618.82[天文地球—矿床学]