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首页> 外文期刊>Annals Of Geophysics >Application of grounded electrical source airborne TEM system in Changyi BIF deposit, Jiaodong Peninsula of eastern China
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Application of grounded electrical source airborne TEM system in Changyi BIF deposit, Jiaodong Peninsula of eastern China

机译：接地电源机载TEM系统在华东胶东半岛昌邑BIF矿床中的应用

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Semi-airborne transient electromagnetic (S-ATEM) method is a hybrid method which employs a grounded electrical or a loop source and an airborne receiver. It has greater investigation depth compared to the airborne electromagnetic method due to its higher transmitting power and more flexibility and efficiency compared to ground electromagnetic method due to its airborne receiving equipment. A new S-ATEM system based on unmanned helicopter is introduced. Besides some information on the technical specifications of the S-ATEM system and data processing technique, a case study of the investigation of Changyi banded iron formation deposit is illustrated. Within the survey area, the ground magnetic method has found a clear magnetic anomaly, whose location has a good correspondence with a ore-body. In order to investigate the underground electrical characteristics and reveal the relationship of ore-body location, subsurface magnetic field anomaly and underground resistivity distribution, a S-ATEM investigation was conducted in January 2016. During the survey, underground resistivity distribution from ground level to a depth of 400 was reconstructed and it was inferred that a strong gran- ite intrusion in the middle of the survey area influenced the ore-body burial depth and magnetic distribution. Although the effect of in- trusion on magnetic field is not as significant as that of the ore-body, the intrusion uplifted and deformed the ore-bearing strata, reducing the burial depth and changing the tilt angle, which indirectly affect the magnetic field distribution of the survey area. ?
机译：半机载瞬态电磁（S-ATEM）方法是一种混合方法，它采用接地电源或环路源以及机载接收器。与机载电磁法相比，它具有更大的研究深度，这是因为其机载接收设备具有比地面电磁法更高的发射功率以及更大的灵活性和效率。介绍了一种基于无人直升机的新型S-ATEM系统。除了有关S-ATEM系统技术规格和数据处理技术的一些信息外，还以昌邑带状铁矿床调查为例进行了案例研究。在调查区域内，地磁法发现了明显的磁异常，其位置与矿体具有良好的对应关系。为了调查地下电学特征并揭示矿体位置，地下磁场异常与地下电阻率分布之间的关系，于2016年1月进行了S-ATEM调查。在调查期间，地下电阻率分布从地平面到地下。重建了400深度，并推断出在调查区域中部强烈的花岗岩侵入影响了矿体的埋藏深度和磁分布。尽管侵入对磁场的影响不如矿体显着，但侵入使矿层抬高并使之变形，从而降低了埋藏深度并改变了倾斜角，从而间接影响了磁场的分布。调查区域。 ？

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