1D and 2D Occam's Inversion of Magnetotelluric Data Applied in Volcano-Geothermal Area In Central Java, Indonesia

6th Asian Physics Symposium

Ariani, Elsi^1 ; Srigutomo, Wahyu^1

Physics of Earth and Complex System, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Indonesia^1

关键词: Geothermal areas;    Magnetotelluric data;    Magnetotelluric soundings;    Occam's inversion;    Resistivity layers;    Resistivity structure;    Thermal alteration;    Two Dimensional (2 D);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/739/1/012036/pdf
DOI  :  10.1088/1742-6596/739/1/012036

来源: IOP

【 摘 要 】

One-dimensional (1D) and two-dimensional (2D) magnetotelluric data inversion were conducted to reveal the subsurface resistivity structure beneath the eastern part of a volcano in Central Java, Indonesia. Fifteen magnetotelluric sounding data spanning two lines of investigation were inverted using Occam's inversion scheme. The result depict that there are extensively conductive layer (2-10 ohm meter) below the volcanic overburden. This conductive layer is interpreted as the clay cap resulted from thermal alteration. A higher resistivity layer (10-80 ohm meter) underlies the clay cap and is interpreted as the reservoir whose top boundaries vary between 1000 m above and 2000 m below sea level.