Agustin, Fenny Prawita (2026) Identifikasi Struktur Bawah Permukaan Gunung Lumpur Wringinanom, Kabupaten Gresik Menggunakan Metode Gravitasi, Magnetik, Self-Potential, Dan Resistivitas 2D Konfigurasi Wenner. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Gunung Lumpur Wringinanom merupakan salah satu manifestasi gunung lumpur non-vulkanik di Kabupaten Gresik yang terbentuk akibat migrasi fluida, gas, dan material sedimen melalui jalur struktur geologi. Kompleksitas sistem bawah permukaan menyebabkan identifikasi struktur pengontrol migrasi fluida memerlukan pendekatan geofisika terintegrasi. Penelitian ini bertujuan mengidentifikasi pola sebaran anomali gravitasi, magnetik, dan Self-Potential (SP), menginterpretasikan distribusi resistivitas bawah permukaan, serta mengintegrasikan hasil seluruh metode untuk mengidentifikasi struktur bawah permukaan yang berkaitan dengan sistem Gunung Lumpur Wringinanom. Data yang digunakan meliputi gravitasi (Complete Bouguer Anomaly/CBA), magnetik, Self-Potential (SP), dan resistivitas 2D konfigurasi Wenner. Hasil penelitian menunjukkan nilai CBA berkisar antara −24.5 hingga −19.5 mGal dengan manifestasi berada pada tepi zona anomali rendah. Anomali SP memiliki rentang −45 hingga 12 mV dan didominasi nilai negatif di sekitar manifestasi. Penampang resistivitas 2D menunjukkan zona resistivitas rendah sebesar 0.3–0.85 Ωm yang diinterpretasikan sebagai material lumpur, lempung jenuh fluida, dan sedimen halus. Analisis magnetik memperkirakan kedalaman rata-rata sumber anomali sekitar 105.8 m dan mengindikasikan adanya zona diskontinuitas bawah permukaan. Integrasi seluruh metode menunjukkan bahwa sistem Gunung Lumpur Wringinanom dikontrol oleh zona diskontinuitas yang berasosiasi dengan sesar naik berarah timur laut–barat daya (NE–SW) sebagai jalur migrasi fluida dan material lumpur menuju permukaan.
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The Wringinanom Mud Volcano is a non-volcanic mud volcano manifestation located in Gresik Regency, Indonesia, formed by the migration of fluids, gases, and sedimentary materials through geological structural pathways. The complexity of its subsurface system requires an integrated geophysical approach to identify the geological structures controlling fluid migration. This study aims to identify the distribution patterns of gravity, magnetic, and Self-Potential (SP) anomalies, interpret the subsurface resistivity distribution, and integrate the results of all geophysical methods to characterize the subsurface structure associated with the Wringinanom Mud Volcano system. The datasets used include gravity data represented by Complete Bouguer Anomaly (CBA), magnetic data, Self-Potential (SP) data, and two-dimensional (2D) resistivity data acquired using the Wenner configuration. The results indicate that the CBA values range from −24.5 to −19.5 mGal, with the mud volcano manifestation located along the margin of a low-gravity anomaly zone. The SP anomaly ranges from −45 to 12 mV and is dominated by negative values around the manifestation area. The 2D resistivity sections reveal a low-resistivity zone of 0.3–0.85 Ωm, interpreted as mud, fluid-saturated clay, and fine-grained sediments. Magnetic analysis estimates the average depth of the magnetic anomaly source to be approximately 105.8 m and indicates the presence of a subsurface discontinuity zone. The integrated interpretation suggests that the Wringinanom Mud Volcano system is controlled by a subsurface discontinuity associated with a northeast–southwest (NE–SW)-trending reverse fault, which acts as the primary migration pathway for subsurface fluids and mud materials toward the surface.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Geofisika terintegrasi, Gunung Lumpur Wringinanom, Self-Potential (SP), Resistivitas 2D Wenner, Struktur bawah permukaan, Integrated geophysics, Wringinanom Mud Volcano, Self-Potential (SP), Wenner 2D resistivity, Subsurface structure. |
| Subjects: | Q Science > QE Geology > QE601 Geology, Structural |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Fenny Prawita Agustin |
| Date Deposited: | 27 Jul 2026 03:15 |
| Last Modified: | 27 Jul 2026 03:15 |
| URI: | http://repository.its.ac.id/id/eprint/137712 |
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