摘要
四川石棉大渡河地区金矿带位于松潘—甘孜造山带南段稀有金属、贵金属和有色多金属成矿带,区内构造复杂,地形陡峻,严重制约找矿勘查的实践运用。本文总结区域成矿地质背景和条件、地球物理特征,以石棉县倮倮坪金矿为典型矿区,开展以音频大地电磁测深(AMT)为核心的地球物理深部勘查工作,圈出3个低电阻率异常体M1、M2和M3,与矿化蚀变带I号、金矿化带Ⅲ号和金铜矿体具有对应性,说明地球物理方法深部找矿具备有效性和适用性。结合地质认识和工程手段验证成果,总结典型矿区地质和地球物理找矿标志,建立适用于地区金矿带的地质—地球物理找矿模型,为地区深部找矿提供技术支撑。
The gold ore zone in the Daduhe area of Shimian County,Sichuan Province,is located in the rare metal-precious metal-nonferrous polymetal metallogenic belt in the southern segment of the Songpan-Ganzi orogenic belt.It exhibits complex structures and steep terrains,severely restricting prospecting and exploration.Based on the geological settings,conditions,and geophysical characteristics for regional mineralization,this study investigated the typical Luoluoping gold deposit in Shimian by conducting deep geophysical exploration centered on audio-frequency magnetotellurics(AMT).Three low-resistivity anomalies(M1,M2,and M3)were identified,corresponding to the mineralized alteration zone I,the gold mineralization zone III,and the gold-copper ore body,respectively,demonstrating the effectiveness and applicability of geophysical methods for deep prospecting.Combined with geological understanding and engineering verification,this study summarized geological and geophysical prospecting markers for the typical gold deposit,establishing the geological-geophysical prospecting model for the gold ore zone in the study area.Therefore,this study provides technical support for deep prospecting in the study area.
作者
姚文
郭军
孙崇波
周洪兵
张洪超
YAO Wen;GUO Jun;SUN Chong-Bo;ZHOU Hong-Bing;ZHANG Hong-Chao(Sichuan Institute of Metal Geological Survey,Chengdu 611730,China)
出处
《物探与化探》
CAS
2024年第5期1247-1257,共11页
Geophysical and Geochemical Exploration
基金
四川省石棉大渡河地区金多金属矿深部找矿关键技术研究项目(SDDY-Z2022017)。
关键词
石棉
金矿带
地球物理
找矿模型
Shimian
gold ore zone
geophysics
prospecting model
作者简介
第一作者:姚文(1989-),男,2016年硕士毕业于成都理工大学,主要从事地球物理勘查应用与研究工作。Email:427838589@qq.com;通讯作者:郭军(1988-),男,2012年本科毕业于桂林理工大学,主要从事地球物理矿产勘查工作。Email:327882438@qq.com。
