云南省新平县大红山铜矿床地质特征及成矿模式探讨
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摘要
大红山铜矿床位于扬子地台西缘红河深大断裂北东侧,康滇地轴南端,是我国著名的古元古宙层控铜矿床。关于该矿床的成因类型,主要有火山喷气—沉积型、古火山型、火山沉积变质—岩浆熔离—接触交代多成因型、海底火山喷发沉积—热液改造型、块状硫化物型以及IOCG型等多种观点。笔者基于多年在该矿区工作所掌握的生产资料的基础上,通过对矿体(化)与岩相(性)相互关系的深入分析,认为酸性火山喷发及其碎屑沉积是该矿床形成的主导因素,矿床由古海隆线状酸性岩浆喷发沉积形成初始矿体,经区域热变质成矿。
Dahongshan Copper Deposit is a famous Paleoproterozoic stratiform controlled copper deposit.It lies at east-north side of the Honghe deep fracture in the western margin of the Yangtze plate located in the southern end of Xikang-Yunnan axis.There are various views on the genesis of this deposit such as exhalation-sedimentation,paleovolcano,volcanic sedimentary metamorphism-magmatic differentiation-contact metasomatism.Submarine volcanic eruption-sedimentation-thermal reformation,VMS and IOCG et al.Based on the first hand information collected by working in the ore district for many years and analyzing profoundly the mutual connection between ore bodies and lithofacies,it is considered that the acidic volcano eruption as well as consequent clastic sediments is the leading factor,as well as the initial ore bodies,originated from function of acidic linear magmas eruption-sedimentation in ancient sea dome,is transformed into copper deposit by function of regional thermal metamorphism.
Dahongshan Copper Deposit is a famous Paleoproterozoic stratiform controlled copper deposit.It lies at east-north side of the Honghe deep fracture in the western margin of the Yangtze plate located in the southern end of Xikang-Yunnan axis.There are various views on the genesis of this deposit such as exhalation-sedimentation,paleovolcano,volcanic sedimentary metamorphism-magmatic differentiation-contact metasomatism.Submarine volcanic eruption-sedimentation-thermal reformation,VMS and IOCG et al.Based on the first hand information collected by working in the ore district for many years and analyzing profoundly the mutual connection between ore bodies and lithofacies,it is considered that the acidic volcano eruption as well as consequent clastic sediments is the leading factor,as well as the initial ore bodies,originated from function of acidic linear magmas eruption-sedimentation in ancient sea dome,is transformed into copper deposit by function of regional thermal metamorphism.
引文
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[3]杨金富,周仕雄,薛力鹏.云南德钦羊拉矿区路农铜矿床地质特征及找矿远景[J].现代矿业,2016(4):131-135.
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[6]钟昆明,颜以彬,秦德先.云南大红山基底地层中的层状铜矿及其含矿地层的成因[J].昆明理工大学学报,1999,24(1):137-144.