摘要
矽卡岩型金属矿床的形成与构造活动是密切相关的。本文以安徽铜山矽卡岩型铜矿床为研究对象,通过对岩体侵位特征、矽卡岩矿化分带特征、和矿物组合变化规律的研究,系统分析了断裂、褶皱、不整合、接触带等构造活动对本区矽卡岩型铜矿床的成矿控矿意义以及对于矽卡岩矿化的影响。研究表明,构造运动贯穿岩浆上侵、就位、岩浆热液流体活动、接触交代、成矿等整个地质过程;岩浆侵位和矿体的赋存主要受不整合面控制;垂向上矽卡岩矿化分带不同,浅部矿体主要产于石炭-二叠系(C-P)灰岩与燕山期花岗闪长岩体形成的矽卡岩接触带上,而深部矿体则是由于岩浆热液流体的灌入式侵位,发生接触交代、矽卡岩化而成矿的;断裂-接触带共同控矿导致反向矽卡岩矿化分带。
The formation of skarn-type ore deposits is closely related with geological structures.In this paper,the Tongshan Cu deposit in Anhui province is systematically studied,involving the geological structures that influence skarn deposit formation,such as faults,folds,unconformities and contact zones in the study area.The results show that structural activities run through the whole process involving magma intrusive emplacement,magmatic hydrothermal fluid activity,contact replacement and mineralization.The magmatic emplacement and the presence of ore bodies are mainly controlled by unconformities.Skarn mineralization zoning is different in vertical direction.In the shallow subsurface,the ore body primarily occurred in skarn within the contact zone between C-P limestone and Yanshanian dioritic complex.While at depth,the ore body is associated with intrusive emplacement in the form of hydrothermal fluid,followed by contact replacement and skarnization that caused mineralization.The joint ore-controlling of fault-contact zones resulted in reverse skarn mineralization zoning.
出处
《地质与勘探》
CAS
CSCD
北大核心
2010年第6期1051-1060,共10页
Geology and Exploration
基金
全国危机矿山接替资源找矿项目"长江中下游地区矽卡岩型矿床成矿规律总结及成矿机制研究项目"(编号:20089938)资助
关键词
构造控矿
矽卡岩矿化分带
矽卡岩型铜矿
安徽铜山
structural control of ore deposition
skarn mineralization zoning
skarn Cu deposit
Tongshan
Anhui Province
