| 音频大地电磁法在羊场超大型隐伏磷矿勘查中的应用 |
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| 关键词:audio magnetotelluric method hidden phosphate ore electrical property Yangchang anticline |
| 基金项目:云南省地质勘查基金项目“镇雄县羊场磷矿沉积环境及成矿机制研究”和“云南省镇雄县羊场磷矿区高寨—柏香坝磷矿普查” (编号: Y202301; SJ(2024)KY003; K202301) |
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| Application of Audio Magnetotelluric Method in the Exploration of Large-scale Hidden Phosphate Ore in Yangchang |
| The audio-frequency magnetotelluric method was used to explore and analyze the geological and physical (electrical) characteristics of the Yangchang phosphate mining area. Five electrical layers along with their corresponding strata and structures were identified from the surface to the depth. It was hypothesized that the concealed ore-bearing layer is uplifted in the core of the anticline, gradually extending deeper along the two flanks, generally exhibiting a saddle-shaped distribution. The thickness of the phosphate ore layer was between 40 m and 80 m, with the shallowest depth of approximately 500 m and the deepest depth of approximately 1 500 m. This drilling project has revealed the presence of extensive phosphate deposits in deep areas, and the audio frequency magnetotelluric method has yielded promising results in this region. These research findings indicate that the audio magnetotelluric method is an effective geophysical method for detecting concealed phosphate deposits of similar types. |
| LI Zhong,BAI Bing,HUANG Zhao,ZHANG Yourong,MI Yunchuan,ZHANG Rong,WANG Jinming.2025.Application of Audio Magnetotelluric Method in the Exploration of Large-scale Hidden Phosphate Ore in Yangchang[J].Acta Geoscientica Sinica,46(2):449-455. |
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