投稿时间：2014-05-29
修订日期：2014-07-01
网络发布日期：2014-09-15
中文摘要:柞水-山阳矿集区内矿产多种多样，构造-岩浆-成矿作用明显，斑岩-矽卡岩型铜矿床成矿条件良好，尤其是冷水沟地区岩浆活动频繁，燕山期花岗斑岩体与成矿作用关系密切。从冷水沟斑岩体到外围表现为斑岩型铜钼矿床（洞子沟和孔雀垭地段）、矽卡岩型铜矿床（双龙寨和银洞垭地段）、构造蚀变岩型金银矿床（南沟和徐家湾地段），构成了完整的斑岩成矿体系。岩体蚀变强烈，其中绢英岩化和矽卡岩化与成矿关系最密切。根据脉体穿插关系，可将成矿期分为4个成矿阶段，铜钼矿床主要形成于热液早-中期。斑岩体显示高钾钙碱性地球化学特征，属I型或I→A过渡型，形成环境属燕山期陆内碰撞后伸展环境。文章综合研究了矿化特征、流体包裹体、成矿物理化学条件、岩体特征及成矿机制，建立了冷水沟铜钼矿床的成矿模型，并总结了找矿标志。下一步找矿工作的重点应放在对构造-岩浆-热液成矿作用的研究，加强对岩体和矿体深部的控制。
Abstract:Located in the middle of the Qinling Mountains, the Zhashui-Shanyang ore concentration area possesses various kinds of mineral resources and obvious tectono-magmatism. Ore-forming conditions for porphyry-sharn type copper deposits are favorable. Especially in Lengshuigou area, magmatic activity occurred frequently. The granite porphyry of Yanshanian period was closely associated with mineralization. There are porphyry Cu, Mo (in Dongzigou and Kongqueya), skarn Cu (in Shuanglongzhai and Yingdongya) and structural altered rock-host Au, Ag(in Nangou and Xujiawan) from center to periphery of the porphyry granite, which constitute a complete porphyry metallogenic system. Potassic, quartz-sericite alteration and skarnization are most closely related to mineralization. According to penetrating relationships of veins, metallogenic periods can be divided into four stages. Cu and Mo occurred at the early and middle hydrothermal stage. The geochemistry of porphyry granite shows high-K calc-alkaline and I type or I→A transitional type and its tectonic setting belongs to a local stretching environment after the intracontinental collision in Yanshanian period. Based on composite ore-forming characteristics, fluid inclusions, metallogenic physicochemical conditions and metallogenic mechanism, the authors established a tentative model for the Lengshuigou Cu, Mo deposit and summarized the indicators for prospecting. The further work should be focused on studying tectonic-magmatic-hydrothermal metallogenic activity and strengthening the control of rock body and deep orebody.
keywords:geochemistry Zhashan ore concentration area Lengshuigou area porphyry copper and molybdenum ore deposit metallogenic mechanism
文章编号：
中图分类号：P618.41;P618.65
文献标志码：
基金项目:本文得到“十二五”国家科技支撑计划项目（2011BAB04B05）和公益性行业科研专项经费课题（201111007-3）的联合资助
引用文本：
孟德明,王瑞廷,王鹏,代军治,刘凯,姜超.2014.陕西柞水-山阳矿集区冷水沟铜钼矿床成矿特征及成矿机制探讨[J].矿床地质,33(4):833~846MENG DeMing,WANG RuiTing,WANG Peng,DAI JunZhi,LIU Kai,JIANG Chao.2014.Study of characteristics and metallogenic mechanism of Lengshuigou copper-molybdenum deposit in Zhashui-Shanyang ore concentration area, Qinling orogen, Shaanxi Province[J].Mineral Deposits33(4):833~846
图/表
