Identifikasi Formasi Geologi Bawah Permukaan Menggunakan Metode Vertical Electrical Sounding (VES) di Kabupaten Pasuruan

Dwintasari, Kiki Eka (2025) Identifikasi Formasi Geologi Bawah Permukaan Menggunakan Metode Vertical Electrical Sounding (VES) di Kabupaten Pasuruan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan infrastruktur dan konstruksi bangunan merupakan salah satu pilar utama dalam pertumbuhan ekonomi dan kesejahteraan masyarakat. Pemerintah Indonesia saat ini tengah gencar meningkatkan pembangunan infrastruktur jalan baik jalan tol, jalan raya, dan bandara. Ini memacu kebutuhan bahan baku galian semakin meningkat. Kabupaten Pasuruan merupakan wilayah yang memiliki potensi alam berupa batuan andesit dan lava, terutama daerah Kejayan dan sekitarnya. Untuk mendapatkan informasi ini, dilakukan pengukuran geolistrik yaitu Vertical Electrical Sounding (VES) dengan konfigurasi Schlumberger. Penelitian ini dilakukan khusus di wilayah IUP X, Kejayan, Kabupaten Pasuruan, dengan jumlah 10 titik pengukuran. Data yang dihasilkan kemudian diolah menggunakan software IPI2WIN dan PROGRESS V 3.0 untuk interpretasi 1 dimensi (1D) dan software Rockworks untuk interpretasi 2 dimensi (2D) dan 3 dimensi (3D). Berdasarkan hasil analisis struktur lapisan batuan di lokasi penelitian, batuan yang dominan ditemukan adalah lava, breksi, tuff breksian, tuff, dan tanah (soil). Identifikasi litologi ini diperoleh dari data resistivitas geolistrik yang dikorelasikan dengan peta geologi dan kondisi geologi setempat. Hasil interpretasi menunjukkan bahwa soil memiliki nilai tahanan jenis 0–10 Ωm, tuff 10–100 Ωm, tuff breksian 100–200 Ωm, breksi >200 Ωm, dan lava <2000 Ωm. Potensi volume cadangan bahan galian yang teridentifikasi pada kedalaman 165–75 meter dari permukaan mencapai total 4.915.600 meter kubik. Rincian sebaran volumenya terdiri dari lava sebesar 2.411.200 m³ (49%), tuff sebesar 1.163.200 m³ (24%), tuff breksian sebesar 500.400 m³ (10%), breksi sebesar 834.400 m³ (17%), dan soil sebesar 6.400 m³ (0,2%).
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Infrastructure development and building construction are among the main pillars of economic growth and public welfare. The Indonesian government is currently intensifying infrastructure development, including toll roads, highways, and airports. This has driven a rising demand for raw excavation materials. Pasuruan Regency is a region with natural potential in the form of andesite and lava rocks, particularly in the Kejayan area and its surroundings. To obtain this information, geoelectrical measurements were carried out using the Vertical Electrical Sounding (VES) method with the Schlumberger configuration. This research was specifically conducted in the IUP X area, Kejayan, Pasuruan Regency, with a total of 10 measurement points. The resulting data were processed using IPI2WIN and PROGRESS V 3.0 software for one-dimensional (1D) interpretation, and Rockworks software for two-dimensional (2D) and three-dimensional (3D) interpretation. Based on the analysis of the rock layer structure at the research location, the dominant rocks found are lava, breccia, brecciated tuff, tuff, and soil. The lithological identification was obtained from geoelectrical resistivity data correlated with geological maps and local geological conditions. The interpretation results show that soil has a resistivity value of 0–10 Ωm, tuff 10–100 Ωm, brecciated tuff 100–200 Ωm, breccia >200 Ωm, and lava <2000 Ωm. The potential volume of extractable material identified at depths between 165–75 meters from the surface totals 4,915,600 cubic meters. The volume distribution consists of lava at 2,411,200 m³ (49%), tuff at 1,163,200 m³ (24%), brecciated tuff at 500,400 m³ (10%), breccia at 834,400 m³ (17%), and soil at 6,400 m³ (0.2%).

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Batuan, Geolistrik, Resistivitas, Vertical Electrical Sounding, Geoelectric, Resistivity, Rock
Subjects:	Q Science Q Science > QC Physics Q Science > QC Physics > QC665.E38 Electric fields. Q Science > QC Physics > QC851 Coordinates--Measurement.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Kiki Eka Dwintasari
Date Deposited:	28 Jul 2025 03:32
Last Modified:	28 Jul 2025 03:32
URI:	http://repository.its.ac.id/id/eprint/121951

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