沂沭断裂带中段及西侧金矿成矿类型及成矿作用

发布时间：2018-08-09 15:57

【摘要】：探讨沂沭断裂带中段及其西侧金矿床的成矿类型及成矿作用,为金矿勘查提供依据。研究区金矿床类型包括岩浆期后热液型和绿岩带型,其中岩浆期后热液型又分为矽卡岩型、隐爆角砾岩型和潜火山热液石英脉型。选取铜井金铜矿床和化马湾金矿床作为岩浆期后热液型和绿岩带型金矿类型的典型代表,从矿床的地质特征、矿体特征及成矿作用等方面进行分析。研究表明岩浆作用是岩浆期后热液型矿床成矿主导因素,控矿构造是其空间展布形式;区域变质作用是绿岩带型金矿成矿的主导因素。该地区寻找与燕山期侵入杂岩体有关的火山热液型金矿床是下一步找矿的重要方向,其中次火山侵入杂岩体分布区、爆破角砾岩筒、断裂构造交汇部位以及化探异常与地质标志相对应地段均是找矿勘查的方向。
[Abstract]:The metallogenic types and mineralization of gold deposits in the middle section of Yishu fault zone and its west side are discussed, which provides the basis for gold exploration. The types of gold deposits in the study area include post-magmatic hydrothermal type and greenstone zone type, among which the post-magmatic hydrothermal type can be divided into skarn type, crypto-explosive breccia type and subvolcanic hydrothermal quartz vein type. Cujing gold-copper deposit and Huamawan gold deposit are selected as typical representatives of post-magmatic hydrothermal type and greenstone belt type gold deposit. The geological characteristics, orebody characteristics and mineralization of the deposit are analyzed. The results show that magmatism is the dominant metallogenic factor of post-magmatic hydrothermal deposits, ore-controlling structure is the spatial distribution form, and regional metamorphism is the dominant factor in the mineralization of greenstone belt type gold deposits. Looking for volcanic hydrothermal gold deposits related to Yanshanian intrusive complex in this area is the important direction of next prospecting, in which sub-volcanic intrusive complex distribution area, blasting breccia tube, The intersection of fault structures and the corresponding areas of geochemical anomalies and geological markers are the direction of prospecting and exploration.
【作者单位】：山东省地质调查院;中国地质大学地球科学与资源学院;
【基金】：山东省地质勘查项目(鲁勘字2007-09)
【分类号】：P618.51

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