东昆仑清水河东沟钼矿床成矿模式探讨  

Discussion on metallogenic model of Qingshuihedonggou Mo deposit in East Kunlun area

作　　者：马忠元 张勇 李军 马强 MA Zhongyuan;ZHANG Yong;LI Jun;MA Qiang(The Third Institute of Qinghai Geological Prospecting,Xining 810029,Qinghai,China)

机构地区：[1]青海省第三地质勘查院,西宁810029

出　　处：《地质找矿论丛》2024年第3期293-300,共8页Contributions to Geology and Mineral Resources Research

基　　金：青海省第三地质勘查院自筹科研项目(编号:SKYZC-2022-007);青海省“高端创新创业人才计划”项目《青藏高原北缘三叠纪斑岩铜多金属矿成矿作用研究》联合资助。

摘　　要：本文在总结东昆仑清水河东沟钼矿床成矿地质背景和矿床特征的基础上,通过分析矿石的流体包裹体特征,探讨了矿床成因并建立了成矿模式。研究表明,清水河东沟钼矿床是与浅成超浅成斑岩侵入活动有关的斑岩型钼矿床,成矿岩体为二长花岗斑岩,在斑岩及蚀变围岩中发育呈层状、似层状、透镜状钼矿体;辉钼矿多以鳞片集合体状、星点状分布于石英脉体中及岩石裂隙面上,少量以细脉浸染状分布于蚀变岩石中;矿石流体包裹体具有高—低温、低盐度、低密度的特点。清水河东沟钼矿床形成于晚三叠世后碰撞伸展环境,成矿物质来源主要为斑岩岩浆。该研究结果可为进一步开展区域成矿规律研究和找矿勘查工作提供参考。Based on summary of metallogenic geological background and deposit characteristics and fluid inclusion characteristics of ore of Qingshuihedonggou molybdenum deposit the paper discusses the metallogenic model and genesis.The Mo deposit is a porphyry Mo deposit related to a shallow-uper-shallow porphyry intrusion.Monzogranite is the host rock.Layered,layeroid and lenticular Mo ore bodies occur in the porphyry and altered surrounding rock.Molybdenite occurs generally as scale aggregates or sporadic crystal in quartz veins or at the plane of fractures,rarely veinlets and dissemination in altered rock.Fluid inclusion of ore is characterized by high-low temperature,low salinity and low density.The Mo deposit is formed under continent-continent collision and post collision extensional environment.Ore materials come from porphyry magma.This paper can provide reference for further study on regional metallogenic law and prospecting.

关 键 词：清水河东沟钼矿床 斑岩型钼矿 成矿模式 东昆仑 青海省 

分 类 号：P618.65[天文地球—矿床学]