| 杨炳南,王家俊,何彦南,刘建中,祁连素,王泽鹏,胡涛.黔西南层控卡林型金矿床电性结构特征——水银洞剖面音频大地电磁测深研究[J].贵州地质,2016,33(1):1-7，13 |
| 黔西南层控卡林型金矿床电性结构特征——水银洞剖面音频大地电磁测深研究 |
| Electrical Structural Features of Strata Bound Carlin-type Gold Deposit in Southwest Guizhou——Audio Magnetotelluric Sounding of Shuiyindong section |
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| 中文关键词: 层控卡林型金矿床 音频大地电磁法 电性结构 构造格架 黔西南 |
| 英文关键词:Strata Carlin-type gold deposit Audio mangnetotelluric sounding method Electrical structure Tectonic framework Southeast Guizhou |
| 基金项目:中国地质调查局“贵州贞丰-普安金矿整装勘查区专项填图与技术应用示范”（项目编号12120114016301）资助。 |
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| 中文摘要: |
| 水银洞金矿作为黔西南层控卡林型金矿重要组成部分，矿体赋存于倾角较缓的不纯碳酸盐岩中，主要矿体以层状、似层状受控于主体褶皱灰家堡宽缓背斜两侧500 m附近。笔者在水银洞金矿343线已知矿体上开展了音频大地电磁法试验研究，重点对深部电性结构、背斜褶皱形态及不整合界面型金矿异常进行研究，结合物性特征，对实测的数据进行反演计算，得出由浅到深总体表现为“高阻-低阻-高阻”的分层电性特征，矿体、蚀变体的视电阻率值也集中表现为相对低值异常。在此基础上，对灰家堡背斜东部优选靶区（400勘探线）开展音频大地电磁法测深工作，获得了该区浅地表至二叠系中统茅口组电性结构特征，推测灰家堡背斜轴面向东倾没至“纳马寨”一带；最后，茅口组与龙潭组之间存在一稳定的横向中低阻条带状起伏界面异常，体现了背斜核部的强硅化砾状粘土岩型矿体和围岩之间的过渡特征。 |
| 英文摘要: |
| Shuiyindong gold deposit is an important part of Karlin-type gold deposits in southwest Guizhou，the orebody occurs in impure carbonate rock of low angle，the main orebody is controlled by the two sides of Huijiaobao anticline 500m nearby as stratiform and stratoid. Audio mangnetotelluric sounding experience was studied in the known orebody of line 343 in Shuiyindong gold deposit，especially the deep electrical structure，anticline fold shape and unconformity interface gold anomaly. With the physical features，the tested data were back calculated and showed the layer electrical feature of ‘high resistance-low resistance-high resistance’ from shallow to deep，the apparent resistivity of orebody and altered rock showed low anomaly. On the basis，Audio mangnetotelluric sounding was studied in the precedence target area of east Huijiabao anticline，the electrical structure features are known from shallow plane to Maokou formation，middle Dyas of this area，it was supposed the axial surface of Huijiabao anticline leaned east to Namazhai area. Finally，a stable lateral middle-low resistance stripped irregular plane anomaly existed between Maokou formation and Longtan formation，it showed the transverse features of strong sllicified clay rock and wall rock of anticline core. |
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