青海省尖扎县洛洼铅锌矿床成矿地质特征及成因分析  

Metallogenic geological characteristics and genetic analysis of Luowa lead zinc deposit in Jianzha County,Qinghai Province

作　　者：李志斌 李善财 薛长军 Li Zhibin;Li Shancai;Xue Changjun(The Second Bureau of Qinghai Nonferrous Metals Geological Exploration,Xining 810007,China)

机构地区：[1]青海省有色第二地质勘查院,青海西宁810000

出　　处：《能源与环保》2022年第9期157-161,169,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：中央财政补助地方地质勘查项目资助(青国土资矿[2004]55号)。

摘　　要：洛洼铅锌矿床位于松潘-甘孜印支褶皱系青海南山冒地槽褶皱带隆务河凹陷内,该区地质环境复杂,成矿条件优越。矿床赋矿围岩为一套浅海相砂砾岩,成矿受沉积作用、构造运动综合控制,矿体一般产于近东西向构造破碎带中,目前已在该矿区发现银铅锌矿体28条。在讨论了成矿地质背景、矿床地质特征的基础上进行了综合研究。研究结果表明,该区中三叠统中岩组砂砾岩地层为成矿提供了主要矿源物质,构造运动为区内成矿提供了热动力条件,具中低温热液成矿的特征,为中-低温热液型铅锌矿床。Luowa lead-zinc deposit is located in the Longwuhe sag of the Nanshan Maogeosyncline fold belt of the Songpan Ganzi Indosinian fold system in Qinghai.The geological environment in this area is complex and the metallogenic conditions are superior.The host rock of the deposit is a set of shallow sea facies glutenite.The mineralization is comprehensively controlled by sedimentation and tectonic movement.The ore body is generally located in the nearly east-west structural fracture zone.At present,28 silver lead zinc ore bodies have been found in the mining area.On the basis of discussing the metallogenic geological background and the geological characteristics of the deposit,a comprehensive study was carried out.The research results show that the sand conglomerate stratum of the Middle Triassic Middle Rock Formation in the area provides the main ore source material for mineralization,and the tectonic movement provides the thermodynamic conditions for mineralization in the area.It has the characteristics of medium low temperature hydrothermal mineralization,and it is a medium low temperature hydrothermal lead-zinc deposit.

关 键 词：洛洼地区 铅锌矿床 矿床成因 中-低温热液型 

分 类 号：P613[天文地球—矿床学]