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Journal : Jurnal Geomine

Rock Types Classification and Distribution on Anabanua Village, Barru Regency, South Sulawesi Muhammad Resky Ariansyah; Muhammad Fawzy Ismullah Massinai; Muhammad Altin Massinai
Jurnal Geomine Vol 8, No 1 (2020): Edisi April 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6745.469 KB) | DOI: 10.33536/jg.v8i1.530

Abstract

Anabanua Village, Barru Regency is one of the areas in South Sulawesi that has quite unique geological conditions. This condition inseparably comes from the complicated geological process that took place during the formation of the island, Sulawesi. In Anabanua Village, there are many types of rocks such as sedimentary rocks, metamorphic rocks and igneous rocks. This paper aims to map and classify the types of rock by taking samples on different places in the research area. Then we observe the samples physical properties. The results showed, from taking 10 rock samples in different places, they have various characteristics. 8 of them were sedimentary rocks, they are Limestone Quartz, Limestone Sand, Shale, Sandstone, Coal, Limestone Bioturbation, Breccia, and Chert Stone. The other 2 samples were metamorphic rocks, they are Greenschist and Quartzite.
Penentuan Hiposenter Dan Mekanisme Fokus Gempa Bumi MLv4,8 1 Januari 2015 Di Sekitar Sesar Matano Muhammad Fawzy Ismullah Massinai; Muhammad Altin Massinai; Aulia Puji Astuti; Nurainun Sholihat Arifuddin
Jurnal Geomine Vol 8, No 2 (2020): Edisi Agustus 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i2.612

Abstract

Earthquake was recorded by BMKG on Thursday January 1, 2015 at 22:20:04.8 GMT or Friday January 2, 2015 at 06:20:04.8 Central Indonesia Time. Hypocenter located at 120.87 E, 2.22 S with depth of 17 km and magnitude MLv4.8. Purpose of this research is to study fault plane mechanism that cause this earthquake using hypocenter and focal mechanisms. This research used waveform MLv4.8 January 1, 2015 which recorded at BMKG earthquake observation stations. Waveform is processed to obtain arrival time P- and S-wave and polarity of arrival time P-wave. Method used to determine hypocenter is Geiger Method with input are arrival time P- and S-wave. Focal mechanisms determined using the first polarity of arrival P-wave and hypocenter from previous step. Hypocenter obtained from this research is located at 2.2073 S, 120.798 E and 10 km depth. RMS is 0.7391. Focal mechanism of this earthquake is oblique fault, is normal fault with left-lateral strike slip component. Parameters are strike 3120, dip 710 and rake -140. This result is consistent with Matano Fault type as a continuation of Palu-Koro Fault. MLv4.8 January 1, 2015 earthquake occurred because Matano Fault activity. Research results can provide a basis form earthquake hazard mitigation along Matano Fault zone.
Tipologi Sistem Akuifer Endapan Gunungapi Muhammad Fawzy Ismullah Massinai; Syarifullah Bundang; Muhammad Altin Massinai; Wahyu Hidayat
Jurnal Geomine Vol 7, No 2 (2019): Edisi Agustus 2019
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1357.968 KB) | DOI: 10.33536/jg.v7i2.346

Abstract

Akuifer merupakan lapisan batuan bawah permukaan yang dapat menyimpan dan meloloskan air. Keberadaan air tanah di daerah endapan gunungapi umumnya pada batuan yang sangat berpori dan tidak kompak, berselang-seling dengan lapisan-lapisan aliran lava yang umumnya kedap air. Salah satu metoda yang digunakan dalam mengidentifikasi lapisan akuifer bawah permukaan adalah metoda geolistrik tahanan jenis. Metoda ini menggunakan prinsip aliran arus listrik yang mengalir di dalam tanah melalui batuan–batuan. Pada penyelidikan geolistrik tahanan jenis konfigurasi Wenner yang dilakukan di Desa Bissoloro, Kecamatan Bungaya, Kabupaten Gowa bertujuan untuk menentukan jenis lapisan, mengidentifikasi posisi sebaran akuifer dan menentukan jenis akuifer. Pada penelitian ini terdapat tiga lintasan pengukuran tahanan jenis mapping dengan panjang setiap lintasan 470 m, jumlah elektroda sebanyak 48 dan spasi tiap elektroda 10 m. Pada daerah penelitian terdapat dua jenis lapisan yaitu lapisan tufa (12.47 – 75 Ωm) diinterpretasikan sebagai lapisan akuifer dan lapisan breksi berselingan lava (76 – 2.203,19 Ωm). Posisi akuifer pada daerah penyelidikan tersebar di setiap lintasan. Jenis akuifer yang ada pada daerah tersebut yaitu akuifer bebas dan akuifer menggantung.