小秦岭金钼多金属矿集区西部区域地质地球化学特征、成矿模式与找矿方向  

Regional geochemistry,metallogenetic model and ore prospects of the western Xiaoqinling Au-Mo polymetallic ore-concentrated area,China

作　　者：王瑞廷 秦西社[3] 袁海潮 丁坤 王磊[3] 毛景文 WANG Ruiting;QIN Xishe;YUAN Haichao;DING Kun;WANG Lei;MAO Jingwen(Engineering and Technology Research Center for Comprehensive Utilization of Mineral Resources in Shaanxi Province,Xi’an 710054,Shaanxi,China;Faculty of Geosciences and Resources,Chang’an University,Xi’an,710054,Shaanxi,China;Northwest Geological and Mining Group Co.Ltd.for Nonferrous Metals,Xi’an 710054,Shaanxi,China;Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;Faculty of Geosciences and Resources,China University of Geosciences,Beijing 100083,China)

机构地区：[1]陕西省矿产资源综合利用工程技术研究中心,陕西西安710054 [2]长安大学地球科学与资源学院,陕西西安710054 [3]西北有色地质矿业集团有限公司,陕西西安710054 [4]中国地质科学院矿产资源研究所,北京100037 [5]中国地质大学地球科学与资源学院,北京100083

出　　处：《地质通报》2021年第4期531-544,共14页Geological Bulletin of China

基　　金：国土资源部公益性行业科研专项经费课题《陕西秦岭地区与小岩体有关的铜钼多金属矿成矿背景与找矿预测研究》(编号:201111007-3);“十二五”国家科技支撑计划项目《陕西秦岭地区主要矿集区铅锌、银、铜、金综合勘查技术研究》(编号:2011BAB04B05)。

摘　　要：小秦岭金钼多金属矿集区地质构造复杂,构造岩浆活动强烈,金、钼、银等化探异常连片成带分布,综合异常众多,成矿条件良好。小秦岭矿集区西部岩石地球化学分析表明,区内小岩体酸度较高、中等富碱,主要为高钾钙碱性系列,存在一定程度的壳幔物质混合。大花岗岩基主要沿EW向与NE向2组构造交汇部位上侵,小斑岩体主要受次级构造的控制,常在花岗岩基外带一定范围内或小岩体内及其周围成矿,地层、构造和岩浆活动三者是关键性的控矿因素。结合金、钼矿床地质特征、成矿规律、成矿机制分析等,提出了该区金矿床的构造岩浆活化成矿模式,总结了钼矿床成矿模式;依据区域矿化富集规律和找矿实践,建立了系统的区域找矿模型,并在此基础上,指出下一步找矿靶区和找矿方向。The Xiaoqinling Au-Mo polymetallic ore-concentrated area with complex structure and active magmatism is characterized by continuous zones of Au-Mo-Ag geochemical anomalies and ideal metallogenic conditions.The small plutons in the area belongs to the high potassium calc-alkaline series,with relatively high acidity and moderately rich alkali,and there is a certain degree of crust-mantle mixing material involved in them.The large granite plutons are mainly emplaced on the intersection of EW-trending and NE-trending structures.While,subject to the strata-structure-magmatism united control,the small mineralized porphyries controlled by secondary structures are distributed around the large granite plutons or within small intrusives.The metallogenic model of tectono-magmatic activation is drawn from combination of geology,metallogenic regularity and mechanism etc.of Au-Mo deposits.Based on the regional mineralization regularity and prospecting practice,the systematic regional prospecting model is established,and ore prospects are outlined.

关 键 词：小秦岭矿集区 地球化学特征 矿床类型 成矿模式 找矿模型 找矿方向 

分 类 号：P618.51[天文地球—矿床学] P618.65[天文地球—地质学]