Jumransyah, - (2014) Pendugaan Struktur Bawah Permukaan Gunungapi Kelud Berdasarkan Survei Gayaberat. Sarjana thesis, Universitas Brawijaya.
Abstract
Telah dilakukan studi geofisika dengan metode gayaberat di kawasan Gunungapi Kelud dan sekitarnya menggunakan Gravitimeter La Coste & Romberg tipe G-1053 dengan interval 1 km yang tersebar di area seluas 20x30 km² dengan 203 titik ukur. Pengolahan data dilakukan sampai diperoleh anomali Bouguer. Densitas Bouguer ditentukan menggunakan metode Paranis, dengan densitas Bouguer yang dihasilkan sebesar 2,51 gr/cm2. Anomali Bouguer lengkap diproyeksikan ke bidang datar dengan metode Dampney pada ketinggian 800 m dpl dengan kedalaman sumber equivalen titik massa 2600 m dpl. Pemisahan anomali lokal dan regional dilakukan dengan metode kontinuasi keatas pada ketinggian 4000 m dari bidang datar. Berdasarkan interpretasi kualitatif diperoleh anomali positif berkisar 35 sampai 140 mGal, sedangkan Interpretasi secara kuantitatif dengan metode poligon 2 D diperoleh beberapa jenis batuan yaitu andesit, basalt, lava dan magma.
English Abstract
Gravity investigation have been done arround Kelud Volcano using Gravitimeter La coste & Romberg G-1053 with coverage study area about 20 x 30 km2.. There are 203 measuring points and 1 km spacing between each point. Standard data processing was performed on the data to obtain Bouguer anomaly. Bouguer density was determined using the Paranis method and got the Bouguer density about 2.51 gr/cm2. Total Bouguer anomaly was projected on a flat surface using the Dampney method at elevation 800 m above sea level with a depth equivalent to a point source of mass about 2600 m above sea level. Separation of local and regional anomalies was performed using continuation method up to 4000 m from the plane of speroid reference. Base on a qualitative interpretation resulted positive anomaly about 35 to 140 mGal, while using quantitative interpretation by 2 D polygon method resulted lithology of rock like andesite, basalt, lava and magma.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2014/84/051401149 |
| Subjects: | 500 Natural sciences and mathematics > 530 Physics |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Fisika |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 17 Feb 2014 08:44 |
| Last Modified: | 08 Dec 2021 06:58 |
| URI: | http://repository.ub.ac.id/id/eprint/154101 |
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