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All Journal Jurnal Ekologi, Masyarakat dan Sains Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Bahdad
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Chemistry Earth & Planetary Sciences Energy Environmental Science

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Mikrofasies batugamping Formasi Tokala Daerah Ululere dan Sekitarnya, Kabupaten Morowali Sulawesi Tengah Arisona; Praja, Nia Kurnia; Eldin; Masri; Muliddin; Ali Okto; Hasria; Bahdad
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 1 (2024): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v25i1.786

Abstract

Penelitian mikrofasies batugamping telah dilakukan pada Formasi Tokala Daerah Ululere. Formasi Tokala terendapkan pada lingkungan laut dalam hingga laut dangkal. Tujuan utama penelitian ini yaitu untuk menentukan lingkungan pengendapan batugamping dengan pendekatan zona mikrofasies. Metode penelitian yang digunakan adalah pendekatan secara analisis kualitatif dengan menggunakan data lapangan dan dilanjutkan dengan analisis laboratorium. Penentuan mikrofasies batugamping pada lokasi penelitian menggunakan analisis standar mikrofasies dengan sayatan tipis. Analisis petrografi terhadap sepuluh sampel batugamping menunjukan beberapa litologi meliputi mudstone, wackestone, packstone dan batugamping kristalin dengan kelimpahan foraminifera planktonik. Berdasarkan hasil analisis petrografi memperlihatkan beberapa tipe mikrofasies batugamping yaitu wackestone bioklastika dengan foraminifera planktonik globigerinids, mudstone pelagis dengan foraminifera planktonik globigerinid, mudstone dengan mikrit dan mikrosparit, dan peloidal packstone. Mikrofasies ini terendapkan di beberapa lingkungan pengendapan yaitu lingkungan dangkalan dalam, tepi dangkalan dalam dan paparan terbatas. Ketiga lingkungan pengendapan ini memiliki energi yang rendah dan memiliki komposisi mikrit yang sangat banyak serta kelimpahan foraminifera plantonik. Kata kunci: mikrofasies, batu gamping, foraminifera plantonik, Formasi Tokala, kristalin
Application of SVD Method Using Magnetic Data to Identify Subsurface Structures at the Geothermal Area of Sonai Village and its Surroundings, Puriala, Konawe Manan, Abdul; Bahdad; Chahyani, Rani; La Ode Andimbara; Salmatia, Wa Ode
Jurnal Ekologi, Masyarakat dan Sains Vol 6 No 2 (2025): Jul-Des 2025
Publisher : ECOTAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55448/ayq9y305

Abstract

This research was conducted with the aim of identiying the subsurface structures of the geothermal area of ??Sonai Village and its surroundings, Puriala, Konawe using the Second Vertical Derivative (SVD) method. The magnetic data used were obtained through measurements at 126 points. The total magnetic anomaly value obtained after Diurnal and IGRF corrections was -171.17 to 82.47 nT. After carrying out Upward Continuation and further processing, a residual magnetic field anomaly value of around -150 to 90 nT was obtained. Then the SVD method is applied to residual anomalous data that has been reduced to the Pole. Based on the SVD results and 2D modeling, several types of fault structures were found in the research area, consisting of 2 upward faults and 4 normal faults. The closest minor fault to the manifestation is at coordinates 4°1'16.41"S and 122°7'23.23"E which is ±16 meters from the manifestation. These minor faults are thought to be the geothermal pathways, causing the water to become hot in the manifestation area. In addition, it was also found that the subsurface layers of the Sonai area and its surroundings are composed of 3 formations, namely Alluvium Deposits, Alangga Formation and Ultramafic Complex.
Co-Authors Abdul Manan Ali Okto Arisona Chahyani, Rani Eldin Hasria La Ode Andimbara Masri Muliddin Praja, Nia Kurnia Salmatia, Wa Ode