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沙坪沟钼矿是安徽省目前发现的超大型斑岩型钼矿床。该地区以往的地球物理勘探工作以重力和磁法为主,但这些方法垂向分辨率较低。为查明矿区断裂发育特征与矿体分布范围,本次采用可控源音频大地电磁测深法(Controlled Sourse Audio-frequency Magnetotelluric,CSAMT)在矿区开展试验与研究。共布设4条测线,其中1条经过已知地质剖面,数据经预处理后,分别采用博斯蒂克反演、奥克姆反演和非线性共轭梯度反演3种方法进行反演计算,通过对比分析并结合已知断裂信息,最终选用博斯蒂克反演方法用于研究区的数据处理。4条测线的反演剖面显示,研究区内钼矿体呈相对高阻特征,结合已有地质、物探资料,共推断了9条断裂,初步圈定了矿体范围。结果表明,CSAMT方法在钼矿勘查中具有良好的应用效果。
Abstract：The Shapinggou molybdenum deposit is currently the super-large porphyry-type molybdenum deposit discovered in Anhui Province. Previous geophysical exploration in this area primarily relied on gravity and magnetic methods, which exhibit relatively low vertical resolution. To investigate the characteristics of fault development and the distribution of ore bodies in the mining area, this study employed the controlled source audio-frequency magnetotellurics(CSAMT) method for experimentation and research. A total of four survey lines were deployed, one of which traversed a known geological section. After data preprocessing, the collected data were inverted using these three methods: Bostick inversion, Occam inversion, and non-linear conjugate gradient inversion. Through comparative analysis and incorporation of known fault information, the Bostick inversion method was ultimately selected for data processing in the study area. The inversion profiles from four survey lines reveal that the molybdenum ore bodies in the study area exhibit a relatively high-resistivity signature. Based on integrated geological and geophysical data, a total of nine faults have been inferred, and the extent of the ore body has been preliminarily delineated. The results demonstrate that the CSAMT method shows promising application and effectiveness in molybdenum exploration.
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基本信息:
中图分类号:P618.65;P631.325
引用信息:
[1]陈海宏,王兴会,石卓.CSAMT在沙坪沟斑岩型钼矿勘探中的试验与研究[J].工程地球物理学报,2026,23(02):74-81.
基金信息:
深地国家科技重大专项项目(编号:2024ZD1002805); 云南省科技厅重大科技专项项目(编号:202503AA080016-3)
2026-03-30
2026-03-30