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首页> 外文期刊>Geophysics: Journal of the Society of Exploration Geophysicists >Mineral Exploration using CSAMT data: Application to Longmen region metallogenic belt, Guangdong Province, China
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Mineral Exploration using CSAMT data: Application to Longmen region metallogenic belt, Guangdong Province, China

机译：利用CSAMT数据进行矿物勘探：在广东省龙门地区成矿带的应用

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摘要

A controlled-source audio-frequency magnetotelluric (CSAMT) survey has been carried out to investigate potential iron (Fe) and polymetallic (Pb-Zn-Cu) deposits in Longmen region, which is one of the main metallogenic belts in southern China. Conducting geophysical surveys in this area is quite difficult due to mountainous terrain, dense forest, and thick vegetation cover. A total of 560 CSAMT soundings were recorded along twelve surveying lines. Two-dimensional Occam's inversion scheme was used to interpret these CSAMT data. The resulting electric resistivity models showed that three large-scale highly conductive bodies exist within the surveying area. By integrated interpretation combined with available geologic, geophysical, and geochemical data in this area, three prospective mineral deposits were demarcated. Based on the CSAMT results, a borehole penetrating approximately 250-m depth was drilled at the location of 470 m to the northwest end of line 06, defined with a massive pyrite from the depth of 52–235 m with 7%–16% Fe content, as well as locally high-grade Pb-Zn- and Ag-Ti-bearing ores.
机译：龙门地区是中国南部主要成矿带之一，已开展了控制源音频大地电磁（CSAMT）调查，以调查潜在的铁（Fe）和多金属（Pb-Zn-Cu）矿床。由于山地地形，茂密的森林和茂密的植被，在该地区进行地球物理调查非常困难。沿着十二条测量线共记录了560个CSAMT测深。二维Occam的反演方案用于解释这些CSAMT数据。所得的电阻率模型表明，在测量区域内存在三个大型高导电体。通过综合解释并结合该地区现有的地质，地球物理和地球化学数据，划定了三个潜在的矿床。根据CSAMT结果，在06号线西北端470 m处钻了一个深度约为250 m的井眼，定义为在52–235 m深度处有块状铁矿，铁含量为7％–16％含量以及局部高品位的Pb-Zn-和Ag-Ti矿石。

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