| 原生晕及深穿透地气测量对金矿勘查的指示——以荒漠草原覆盖区内蒙古毕力赫金矿为例 |
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| 关键词:primary halo measurement deep-penetration geogas measurement concealed gold deposit Bilihe gold deposit |
| 基金项目:本文由深地国家科技重大专项(编号: 2025ZD1006505)资助。 |
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| Indication of Primary Halo and Deep-penetration Geogas Measurements for Gold Ore Exploration: A Case Study of the Bilihe Gold Deposit in the Desert-steppe-covered Area, Inner Mongolia |
| The Bilihe gold deposit, located at the northern margin of the North China Craton, is a large porphyry-epithermal composite gold deposit mainly hosted in the inner contact zone of the upper part of a gold-bearing subvolcanic rock mass and the overlying volcanic clastic rock series. The impending resource depletion at this deposit can be attributed to the continuous exploitation of its shallow gold resources; therefore, it is imperative to strengthen the prediction and evaluation of deep mineral exploration in the mining area. This study conducted primary halo measurements on the No. 1 ore belt and No. 26 ore vein of the Bilihe gold deposit to extract effective indicators for prospecting deep-seated gold ore bodies and to verify the application of the deep-penetration geogas method in the exploration of concealed gold deposits in desert-steppe-covered areas. The results showed that the ore-forming indicative element association for gold mineralization at the Bilihe gold deposit includes Au, Ag, As, Sb, Hg, W, Mo, Bi, and Pb. Specifically, the Au-W-Mo-Bi-(Pb) association may indicate high-grade high-temperature porphyry-type gold mineralization, whereas the Au-Ag-As-Sb-(Hg) association may indicate low-grade low-temperature hydrothermal vein-type gold mineralization. The application of the primary halo method to the prediction and evaluation of deep gold ore prospecting can provide weak geochemical prospecting information for concealed gold orebodies. In addition, this study conducted regional geogas areal measurements in areas crossing the northeastern part of the No. 1 ore belt, the southeastern part of the No. 26 ore vein, and the No. 28 ore vein. The results demonstrated that the geogas method can effectively reveal information on deep concealed gold mineralization in desert-steppe-covered areas and delineate three prospecting target areas for deep gold ore prospecting in the Bilihe gold mining area, thus providing a scientific basis and technical support for the accurate prediction and prospecting breakthrough of deep concealed deposits in this area. |
| WAN Wei,FAN Huihu,XU Guangming,WANG Mingqi,WANG Shuilong,LIU Cheng.2026.Indication of Primary Halo and Deep-penetration Geogas Measurements for Gold Ore Exploration: A Case Study of the Bilihe Gold Deposit in the Desert-steppe-covered Area, Inner Mongolia[J].Acta Geoscientica Sinica,47(4):926-938. |
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