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甘肃文县安坝里金矿床地质特征及成矿作用
- 作者：
- 高延龙|杜等虎|王志军|王辉
- 作者单位：
- 中金黄金股份有限公司&中国黄金集团阳山金矿有限公司|中国黄金集团有限公司|中国黄金集团阳山金矿有限公司|甘肃省地质矿产勘查开发局第一地质矿产勘查院
基金项目：
- 国家自然科学基金面上项目（42073008）
详细信息：
- 作者简介：
- 高延龙（1968—），男，甘肃武威人，高级工程师，硕士，从事黄金矿山找矿勘查及管理工作；北京市东城区安定门外大街9号，中金黄金股份有限公司，100011；E-mail：gaoyl@chinagoldgroup.com
- 通讯作者：
- E-mail：dudh@chinagoldgroup.com，18511891621
- PDF下载
Geological characteristics and mineralization of Anbali Gold Deposit in Wenxian County,Gansu Province
- English Author：
- Zhongjin Gold Co.,Ltd.&Yangshan Gold Mine Co.,Ltd.of China National Gold Group|China National Gold Group Co.,Ltd.|Yangshan Gold Mine Co.,Ltd.of China National Gold Group|The First Geological Mineral Exploration Institute of Gansu Provincial Geology and Mineral Bureau
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
安坝里金矿床位于阳山金矿带内。矿区出露地层主要为泥盆系桥头岩组下段、西沟组和岷堡沟组，并经历了后期的变质作用叠加。矿区出露的岩浆岩较少，主要发育花岗斑岩，其与金矿化关系较为密切。围岩蚀变类型主要有硅化、绢云母化、黏土化、碳酸盐化、绿泥石化和绿帘石化等。靠近矿体，硅化、绢云母化较强；远离矿体，黏土化、碳酸盐化更为发育。通过总结安坝里金矿床地质特征，结合前人研究成果，分析了成矿作用，认为金背景值较高的泥盆系地层对金来源有一定贡献，安昌河—观音坝断裂对成矿具有控制作用，成矿流体主要来自幔源岩浆热液流体，硅化发生在整个成矿过程中，绢云母化主要发生在成矿前和成矿期，而碳酸盐化、黏土化则主要发生在成矿后。
关键词:
安坝里金矿床；控矿因素；成矿作用；岩浆过程；围岩蚀变
Abstract:
Anbali Gold Deposit is located in the Yangshan gold belt.The main strata outcropping in the mining district are lower Devonian Qiaotou Formation,Xigou Formation,and Minbaogou Formation,all superimposed with later metamorphism.Few magmatic rocks outcrop in the mining district except for granodiorite porphyry,which is closely related to gold mineralization.The surrounding rock alterations are silicification,sericitization,argillization,carbonatization,chloritization,epidotization.Silicification and sericitization are relatively intense close to the ore body;argillization and carbonatization develop more,far from the ore body.By summarizing the geological characteristics of the Anbali Gold Deposit,based on previous research results,the paper analyzed the mineralization and proposed:the Devonian strata with higher background value contribute to the gold source to some extent;the Anchanghe-Guanyinba fault controls mineralization;ore-forming fluids mainly originate from mantle magmatic hydrothermal fluids;silicification takes place during the whole process of mineralization;sericitization mainly takes place before and during mineralization;carbonatization and argillization take place after mineralization.
Keywords:
Anbali Gold Deposite;ore-controlling factor;mineralization;magmatic process;surrounding rock altera-tion