Identifikasi Karakteristik Fluida dan Estimasi Temperatur Reservoir Panas Bumi di Tanjung Raya dan Palupuh, Kabupaten Agam
DOI:
https://doi.org/10.25077/jfu.12.3.394-400.2023Keywords:
Diagram segitiga, estimasi temperatur reservoir, fluida panas bumiAbstract
Telah dilakukan penelitian tentang identifikasi karakteristik fluida dan estimasi temperatur reservoir panas bumi di Tanjung Raya dan Palupuh, Kabupaten Agam. Sampel penelitian diambil dari 2 titik sumber mata air panas masing-masing sebanyak 500 ml pada bagian dasar, tengah dan permukaan mata air panas. Identifikasi karakteristik fluida panas bumi dilakukan menggunakan diagram segitiga Cl-Li-B untuk menentukan asal-usul dan pengenceran fluida panas bumi serta diagram segitiga Na-K-Mg untuk menentukan kesetimbangan fluida panas bumi. Estimasi temperatur reservoir panas bumi ditentukan dengan persamaan geotermometer. Konsentrasi unsur Na, K dan Mg pada masing-masing sampel diuji menggunakan Atomic Absorpsion Spectroscopy (AAS), konsentrasi unsur Ca, Li dan B diuji menggunakan Inductively Coupled Plasma – Atomic Emission Spectroscopy (ICP-AES), konsentrasi unsur Cl diuji menggunakan metode titrasi dan konsentrasi senyawa SiO2 diuji menggunakan Visible Spectroscopy. Berdasarkan hasil penelitian, fluida panas bumi di Tanjung Raya dan Palupuh mengalami sedikit pengenceran dan terletak jauh dari sumber panas bumi. Mata air panas di Tanjung Raya dan Palupuh berada pada daerah immature water yang mengindikasikan fluida panas bumi tidak mencapai kesetimbangan dan terjadi banyak pencampuran dengan air permukaan. Estimasi temperatur reservoir panas bumi yang didapatkan menggunakan persamaan geotermometer silika memiliki temperatur 164,153â°C – 175,209â°C, yang dapat dikategorikan sebagai sistem panas bumi bertemperatur sedang.
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