南秦岭观花坪铜银矿床地质特征及找矿标志  

The geological characteristics and prospecting marks of Guanhuaping copper-silver deposit in south Qinling area

作　　者：张凯 刘文建 陈亚伟 杨超 臧斐 薛龙 张斌 王元 ZHANG Kai;LIU Wenjian;CHEN Yawei;YANG Chao;ZANG Fei;XUE Long;ZHANG Bin;WANG Yuan(Xi’an Institute of Geological and Mineral Exploration,Xi’an710100,China)

机构地区：[1]西安地质矿产勘查开发院有限公司,西安710100

出　　处：《地质找矿论丛》2019年第1期15-20,共6页Contributions to Geology and Mineral Resources Research

基　　金：陕西省地质勘查基金项目(编号:61201405268)资助

摘　　要：观花坪铜银矿床位处南秦岭成矿带中段,矿床产于下寒武-中奥陶统石瓮子组碳酸盐岩建造与中泥盆统大枫沟组碎屑岩建造"不整合接触界面"附近,区域上具明显的层控特征;但在矿区范围内,铜银矿体则严格受断裂破碎带控制,矿体均赋存于叠加在不整合面的断裂破碎带中,明显具后生成矿作用的特点。笔者通过对矿床地质特征、矿体地质特征和矿石特征的研究,结合区域地质背景的分析认为,铜银矿床为多期次多成矿阶段叠加形成的复杂矿床,特别是南秦岭华力西期与印支期—燕山期的构造-岩浆热事件与本区铜银矿床的形成关系密切。Guahuaping copper and silver deposit occurs at unconformity contact zone of carbonate rock of Shiwongzi formation of Lower Cambrian-Middle Ordovician Series and clastic rock of Dafeng formation of Middle Devonian Series in south Qinling mineralization belt.Regionally the deposit is stratabound.In the deposit Cu-Ag ore bodies are strictly controlled by fault zones and they are all located in the cataclastic zones overprinting on the surface of the unconformity contact.The deposit is apparently epigenetic.Based on geological characteristics of the deposit and ore bodies and those of ores and regional background this deposit is a complex deposit formed in multi-stages and is closely related to Hercynian and Hindu-ChinaYanshanian tectonic-magmatic heat events taken place in south Qingling area.

关 键 词：观花坪铜银矿床 地质特征 找矿标志 南秦岭 陕西省 

分 类 号：P618.41[天文地球—矿床学] P618.52[天文地球—地质学]