IDENTIFIKASI SISTEM PANAS BUMI DAERAH WAPSALIT BERDASARKAN STRUKTUR TAHANAN JENIS DATA MAGNETOTELLURIK

  • Iqbal Takodama Pusat Sumber Daya Mineral, Batubara dan Panas Bumi
  • Ahmad Zarkasyi Pusat Sumber Daya Minera, Batubara dan Panas Bumi
  • Mochammad Nur Hadi Pusat Sumber Daya Minera, Batubara dan Panas Bum
  • Ratna Dewi Pusat Sumber Daya Minera, Batubara dan Panas Bum
DOI: https://doi.org/10.47599/bsdg.v13i3.228
Keywords: Wapsalit, metode magnetotellurik, inversi 2-D, Active Constraint Balancing, tahanan jenis, sistem panas bumi

Abstract

Daerah panas bumi Wapsalit berada di Pulau Buru, Maluku, Indonesia yang secara geologi berada pada lingkungan non-vulkanik. Berdasarkan penyelidikan terdahulu, daerah ini memiliki prospek panas bumi di sekitar area manifestasi panas bumi yang dikontrol oleh perpotongan dua sesar. Proses inversi 2-Dimensi dari data magnetotellurik (MT) dilakukan untuk menggambarkan sebaran tahanan jenis batuan bawah permukaan. Proses inversi ini menggunakan algoritma Active Constraint Balancing (ACB) yang memanfaatkan prinsip spatially variable regularization parameter. Lapisan konduktif yang berfungsi sebagai lapisan penudung berupa batuan metamorf terubah muncul di dekat permukaan hingga kedalaman 1000 – 1250 meter. Lapisan ini semakin meninggi seiring dengan kedalaman yang mengindikasikan zona reservoir. Zona tahanan jenis tinggi (resistif) dengan bentuk kubah muncul pada bagian bawah yang diinterpretasikan sebagai batuan intrusif muda

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Published
2018-11-29
Issue
Vol. 13 No. 3 (2018): Buletin Sumber Daya Geologi
Section
Buletin Sumber Daya Geologi

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