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All Journal Bulletin of Scientific Contribution : Geology Buletin Sumber Daya Geologi
Faisal Helmi
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science

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EVOLUSI TEKTONIK BERDASARKAN ANALISIS DATA KEKAR DAERAH BINUANG DAN SEKITARNYA, KECAMATAN BINUANG, KABUPATEN TAPIN, PROVINSI KALIMANTAN SELATAN Andi Supian Yusuf; Ismawan -; Faisal Helmi
Bulletin of Scientific Contribution: GEOLOGY Vol 12, No 3 (2014): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc geology.v12i3.8376

Abstract

Research area administratively located in Binuang district, Tapin Regencies, South Kalimantan Province. Geographically located in coordinate 115° 3' 40,359" East Longitude until 115° 15' 49,871" East Longitude and 3° 1' 7,068" South Latitude 3° 16' 10,038" South Latitude. Based on its physiography aspect, the research area is part of Barito Basin. The object of these research area the geological structures which is focused on the measurement of the fractures on rocks which represents each present tectonic periods, which is used for determining force and the tectonic pattern in the research area. As seen from the field data, it is known that the geological structures available in the research area are anticline, sincline, fracture, sinistral wrench fault, and reverse fault. The tectonic evolution on the research area begins during rifting which continues since Pra-tersier until Eosen with NE-SW direction, resulting the reverse faults with the fault surface estimated to be NW-SE direction, during Pliosen period reactivation of older faults happened on research area. The tectonic process changed into compression with NW-SE direction.
BASEMENT KOMPLEK BAYAH, KABUPATEN LEBAK, PROPINSI BANTEN Aton Patonah; Faisal Helmi; Jodi Prakoso; Taufiq Widiaputra
Bulletin of Scientific Contribution: GEOLOGY Vol 13, No 3 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1254.822 KB) | DOI: 10.24198/bsc geology.v13i3.8405

Abstract

Researching metamorphic rocks in Bayah and in its surrounding area has slight data so it has not been clear yet how the stratigraphic position, the age and the metamorphic rocks characteristic is in the study area. By using geological mapping and petrographic method, it showed that the metamorphic rock is believed to be the basement of Bayah complex which accreted because of reverse fault in the northwest so that the rock appeared together with the relatively younger rocks in the south (Bayah Formation and Granodiorite Cihara). These rocks showed that there are foliation, boudinage and crenulation structure consisting of various types of metamorphic rocks which are different in degrees of metamorphism (low grade – high grade metamorphism) and in protoliths as well, so these interpret as a result of orogenic processes of intermediate pressure metamorphism.
VALIDASI REKAHAN SEBAGAI INDIKATOR BATUAN TERUBAH DENGAN METODE KELURUSAN DAN PETROGRAFI DI DAERAH BUNGBULANG, KABUPATEN GARUT, PROVINSI JAWA BARAT Puspa Khaerani; Andra Taufiq; Dicky Muslim; Faisal Helmi; Yunitha R.I. Putri
Buletin Sumber Daya Geologi Vol. 11 No. 3 (2016): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16048.034 KB) | DOI: 10.47599/bsdg.v11i3.30

Abstract

Garut Selatan menyimpan potensi sumber daya mineral berupa emas, krisopras, dan kalsedon. Di beberapa lokasi di Bungbulang ditemukan adanya batuan terubah dan tambang kalsedon tradisional yang sudah tidak beroperasi lagi yaitu di Sungai Citanggeuleuk. Batuan terubah ini memiliki ciri fisik litologi yang berbeda dengan batuan di sekitarnya seperti berwarna hitam, mengandung mineral muskovit, klorit, dan mineral lempung. Lokasi singkapan batuan terubah diperkirakan berada pada jalur rekahan sesar minor di daerah tersebut. Tujuan penelitian ini untuk mengungkap adanya rekahan yang diperkuat dengan adanya batuan terubah sebagai jalur fluida hidrotermal. Metode yang digunakan dalam penelitian ini yaitu kelurusan dan petrografi. Metode kelurusan yang digunakan berupa analisis kelurusan segmen sungai sebagai analisis dasar kelurusan yang mengindikasikan adanya anomali kelurusan pada lokasi penelitian. Metode petrografi dilakukan untuk mengidentifikasi mineral pada batuan yang menunjukkan adanya pengaruh ubahan karena rekahan. Dari kegiatan pemetaan geologi di daerah penelitian terdapat indikasi batuan terubah di beberapa tempat pada litologi batupasir dan tuf yang mengandung mineral mika putih yang melimpah, klorit, dan mineral lempung. Dari hasil analisis morfometri sungai di daerah ini, diinterpetasikan rekahan yang mempengaruhi pembentukan batuan terubah ini berarah barat-timur yang memanjang dari Sungai Citanggeuleuk sampai Sungai Cianda. Maka rekahan merupakan indikator adanya batuan terubah pada daerah Bungbulang, Garut.
Co-Authors Andi Supian Yusuf Andra Taufiq Aton Patonah Dicky Muslim Ismawan - Jodi Prakoso Puspa Khaerani Taufiq Widiaputra Yunitha R.I. Putri