阳山金矿带安坝矿段深部电性结构及地质意义  

Deep conductive structure of Anba ore section in Yangshan gold deposit belt and its geological meaning

作　　者：陈永凌 蒋首进 谢丹 胡俊峰 CHEN Yongling;JIANG Shoujin;XIE Dan;HU Junfeng(Research Center of Applied Geology,China Geological Survey,Sichuan Chengdu 610059,China)

机构地区：[1]中国地质调查局应用地质研究中心,四川成都610059

出　　处：《中国地质调查》2023年第1期28-36,共9页Geological Survey of China

基　　金：中国地质调查局地质矿产调查评价项目“甘肃省文县阳山金矿带深部矿产远景调查(编号:12120114038301)”资助。

摘　　要：为查明阳山金矿带重点成矿区安坝矿段深部地质构造格架,更好地指导普查工作布设并寻找成矿远景区,利用V8电法工作站,在重点成矿区安坝矿段开展可控源音频大地电磁测量,将测量成果与已有钻孔剖面进行对比分析,初步厘定了安坝矿段的深部电性结构特征为NEE走向、略向东倾伏的背斜构造,查明浅部构造破碎带为成矿的有利位置,提出地球物理找矿方向为呈高低视电阻率异常过渡带特征的破碎带,同时也证明了通过可控源音频大地电磁测量探测控矿构造特征的可实施性,该方法是较好的找矿辅助途径。研究成果对复杂地形下多金属矿床勘查具有一定的借鉴意义。In order to ascertain the deep geological tectonic frame in key mineralization areas of Anba ore section in Yangshan gold deposit belt,and guide the layout of census work and metallogenic zone,the authors in this paper used V8 electrical law workstation to detect Controlled Source Audio-frequency Magneto-telluric(CSAMT)in key mineralization areas of Anba ore section.Comparing the results with existing drilling profiles,the deep conductive structure in Anba ore section is preliminarily defined as anticlinal structure of NEE direction with a plunge of east direction.The shallow tectonic fractured belt is identified as an advantage point,and transition belt with characteristics of abnormal high and low apparent resistivity is supposed to be geophysical prospecting direction.And the CSAMT is proven to be enforceable in detecting ore-controlling structures characteristics,which is the auxiliary approach in prospecting and has guidance effect on polymetallic mineral exploration in complex landform.

关 键 词：阳山金矿 视电阻率 可控源音频大地电磁 背斜构造 断裂 

分 类 号：P631[天文地球—地质矿产勘探] P618.51[天文地球—地质学]