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首页> 外文期刊>International Journal of Technology >Magnetotelluric Investigations in the Way Umpu Geothermal Prospect Area, Lampung Province, Indonesia
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Magnetotelluric Investigations in the Way Umpu Geothermal Prospect Area, Lampung Province, Indonesia

机译：印度尼西亚楠榜省翁布地热勘探区途中的大地电磁调查

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The Geological Research Center’s (GRC) or Pusat Sumber Daya Geologi (PSDG) previous research estimated that the Way Umpu 1 Hot Springs in the Way Umpu geothermal prospect area reflects a reservoir temperature of 160°C–195°C. From geological observations, the main fault structure in that area is the Way Umpu Fault, which has a strike direction of NE–SW and the area is dominated by volcanic rocks. Many joints are also found along the fault line. The Way Umpu-1 Hot Springs is controlled by these geologic structures. The previous research and field observations lead us to carry out continuing research in this area, which is aimed at determining its resistivity structure to a depth of 4 km. For this purpose, we carried out field measurements using Audiomagnetotelluric (AMT) and Magnetotelluric (MT) methods. The work presented in this paper is the result of 1-D and 2-D inversion modeling from 8 MT soundings. We compared inversion models using the 1-D Bostick transformation scheme, 1-D Occam model, and 2-D Nonlinear Conjugate Gradient (NLCG) algorithms. The study results reveal the existence of a strike as indicated from the geological data and a low resistivity zone at a shallow surface to a depth of 2 km that is most probably associated with partial melting and intrusion at a greater depth.
机译：地质研究中心（GRC）或Pusat Sumber Daya Geologi（PSDG）先前的研究估计，Umpu地热勘探区中的Way Umpu 1温泉反映了160°C–195°C的储层温度。从地质观察来看，该地区的主要断层结构是韦姆普断层，其走向为NE–SW，该地区以火山岩为主。沿断层线也发现了许多接头。 Umpu-1温泉的方式由这些地质结构控制。先前的研究和现场观察使我们在这一领域进行了持续研究，旨在确定其电阻率结构至4 km的深度。为此，我们使用音频大地电磁（AMT）和大地电磁（MT）方法进行了现场测量。本文介绍的工作是根据8 MT测深进行一维和二维反演建模的结果。我们使用一维Bostick变换方案，一维Occam模型和二维非线性共轭梯度（NLCG）算法比较了反演模型。研究结果表明，地质数据表明存在走向，并且在浅层至2 km深度处存在低电阻率带，这很可能与较大深度的部分熔融和侵入有关。

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