IDENTIFIKASI BIJIH BESI MENGGUNAKAN INVERSI MAGNETIK DAN GRAVITASI 3 DIMENSI DENGAN MODEL TALWANI (Studi Kasus : Cisolok, Sukabumi, Jawa Barat)

    Isna Nur Fadilah, - and Nanang Dwi Ardi, - and Andhy Setiawan, - (2025) IDENTIFIKASI BIJIH BESI MENGGUNAKAN INVERSI MAGNETIK DAN GRAVITASI 3 DIMENSI DENGAN MODEL TALWANI (Studi Kasus : Cisolok, Sukabumi, Jawa Barat). S1 thesis, Universitas Pendidikan Indonesia.

    Abstract

    Berdasarkan kondisi regional dan petrogenesis batuannya, Cisolok berada dalam zona vulkanik dan tektonik yang aktif. Hal ini mengakibatkan salah satu jenis batuan yang ditemukannya adalah berjenis mafik dengan perkiraan kandungan besi mencapai 9,1%. Aktivitas penambangan pasir besi pun pernah dilakukan di daerah dekat Cisolok, tepatnya di Tegalbuleud pada tahun 2012-2014. Penelitian ini bertujuan mengidentifikasi potensi bijih besi di Cisolok menggunakan inversi data magnetik dan gravitasi dengan model grid Talwani. Penelitian ini dilakukan pada tiga lintasan dengan hasil berupa pemodelan dua dimensi dan tiga dimensi. Tahap pengolahan dua dimensi menggunakan Pustaka Python, sementara pemodelan tiga dimensi menggunakan perangkat lunak ZondGM3d. Hasil penelitian menunjukkan bahwa terdapat daerah dengan nilai magnetik tinggi, yaitu mencapai 0,005 SI berkorelasi dengan nilai densitas yang cukup tinggi, berkisar antara 2,8 hingga 3,0 g⁄〖cm〗^3 pada kedalaman 1500 hingga 2000 meter serta berada di sebelah tenggara dan barat laut daerah penelitian. Meskipun tidak terlalu besar, daerah ini diindikasikan sebagai daerah berpotensi bijih besi dengan klasifikasi batuan mafik bermagnetit minor. Selain itu, penelitian ini juga berhasil menggambarkan bahwa terdapat tiga lapisan batuan pada struktur bawah permukaan. Based on regional geological conditions and rock petrogenesis, Cisolok is located within an active volcanic and tectonic zone. As a result, one of the rock types found in this area is mafic rock, with an estimated iron content of up to 9.1%. Iron sand mining activities were also conducted in a nearby area, specifically in Tegalbuleud, during 2012–2014. This study aims to identify the potential of iron ore deposits in Cisolok using magnetic and gravity data inversion with the Talwani grid model. The research was conducted on three survey lines and the result are two-dimensional and three-dimensional models. Two-dimensional processing was conducted using the Python library, while three-dimensional modeling was performed with ZondGM3D software. The results indicate the presence of zones with high magnetic susceptibility values, reaching 0.005 SI, which correlate with relatively high density values ranging from 2.8 to 3.0 g/cm³ at depths of 1500 to 2000 meters, located in the southeastern and northwestern parts of the study area. Although the extent is not particularly large, these zones are interpreted as areas with potential iron ore, classified as mafic rocks containing minor magnetite. In addition, the study successfully delineates three distinct subsurface rock layers.

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    Official URL: https://repository.upi.edu/
    Item Type: Thesis (S1)
    Additional Information: https://scholar.google.com/citations?user=9mohJ3AAAAAJ&hl=en IDSINTA Dosen Pembimbing: Nanang Dwi Ardi : 257201 Andhy Setiawan : 6040311
    Uncontrolled Keywords: bijih besi, gravitasi, inversi, magnetik, talwani iron ore, gravity, inversion, magnetic, Talwani
    Subjects: G Geography. Anthropology. Recreation > GB Physical geography
    Q Science > Q Science (General)
    Q Science > QC Physics
    Divisions: Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Program Studi Fisika - S1 > Program Studi Fisika (non kependidikan)
    Depositing User: Isna Nur Fadilah
    Date Deposited: 11 Sep 2025 01:57
    Last Modified: 11 Sep 2025 01:57
    URI: http://repository.upi.edu/id/eprint/138368

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