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    PENERAPAN METODE DEKONVOLUSI EULER DAN PEMODELAN INVERSI 3D PADA DAERAH “X”

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    101117024_Tirta Yoga Saputra_Teknik Geofisika_Laporan Tugas Akhir-signed.pdf (4.639Mb)
    Date
    2021-09-11
    Author
    Saputra, Tirta Yoga
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    Abstract
    Research area "X" is a volcanic area with an interesting of volcanic features in particular the form of caldera structures due to repetition of volcanic eruptions since thousands of years ago. The structure of caldera forms a continuous pattern which change due to endogenous and exogenous forces over time. This study is conducted to see the pattern of caldera’s continuity at the subsurface (laterally and vertically) as information that can be used for geothermal exploration, volcanological study as well as seismicity study. In this study, three-dimensional gravity inversion and Euler deconvolution methods were used to obtain the density, position, and depth of the anomaly. On the inversion processing we first run a synthetic data to test the algorithm used in the Grablox software and also to see the response of the inversion result. The inversion algorithm used in this study are Singular Value Decomposition and Occam. Based on the results of data processing and modelling, there are two continuous structures of caldera wall at a depth of 160 to 890 meters which are shown by a circular structure with a density value of 2.53 g/cc as the first caldera and another circular structure with a density value of 2.97 g/cc as the second caldera. It is interpreted that both caldera consist of the same basaltic andesite lithology.
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    https://library.universitaspertamina.ac.id//xmlui/handle/123456789/4708
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