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All Journal Jurnal Penelitian Sains Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Journal of Earth and Marine Technology (JEMT)
Febrim, Dwi Vina
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Agriculture, Biological Sciences & Forestry Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Mathematics Physics Transportation

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Analisis Tingkat Kerawanan Banjir Menggunakan Metode Weighted Overlay Berbasis Sistem Informasi Geografis (SIG) di Kecamatan Ulu Ogan Kabupaten Ogan Komering Ulu Putri, Adisty Merisya; Harnani; Febrim, Dwi Vina
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1758

Abstract

Flooding in the Ulu Ogan Subdistrict, Ogan Komering Ulu Regency, is generally triggered by high rainfall that causes the rivers in Ulu Ogan to overflow. This study aims to analyze the level of flood vulnerability in Ulu Ogan Subdistrict, Ogan Komering Ulu Regency, by utilizing a Geographic Information System (GIS) based on overlay and scoring methods. The overlay method is used to combine various relevant spatial data layers, such as slope gradient, land use, soil type, rainfall, and distance to rivers. Each parameter is assigned a weight and score based on its level of contribution to flood potential, and then integrated to produce a flood vulnerability zoning map. The research area in Ulu Ogan Subdistrict, Ogan Komering Ulu Regency, is dominated by a high level of flood vulnerability. The high vulnerability zone covers approximately 16,987.59 ha (70.19%), the moderate vulnerability zone covers 6,691.86 ha (27.65%), and the low vulnerability zone covers 522.9 ha (2.16%).
Micropaleontological Analysis of Planktonic and Benthic Foraminifera from the Claystone Member of the Bayah Formation (Tebm) and the Limestone Member of the Cijengkol Formation (Tojl), Jatake Area, Lebak Regency, Banten Province Ahmad, Salsabiila Fadhilah; Febrim, Dwi Vina; Harnani, Harnani
Journal of Earth and Marine Technology (JEMT) Vol 6, No 1 (2025)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2025.v6i1.8822

Abstract

Micropaleontological analysis of planktonic and benthic foraminifera from three rock samples—muddy micrite, allochemic sandstone, and wackestone—was carried out to determine the relative age and depositional environment of the Claystone Member of the Bayah Formation (Tebm) and the Limestone Member of the Cijengkol Formation (Tojl) in the Jatake area, Lebak Regency, Banten Province, Indonesia. A total of 43 foraminiferal specimens were identified, including 28 planktonic and 15 benthic individuals. These were used for biostratigraphic and paleoenvironmental interpretation. The results show that the Claystone Member Tebm (RL19) dates to the Middle Eocene, mainly within planktonic foraminiferal biozones P14–P15, which falls under a wider P14–P17 range. In contrast, the Limestone Member Tojl is younger, with sample RL85 assigned to the Late Oligocene (N1–N3) and sample RL23 corresponding to the Late Oligocene to earliest Miocene interval (N3–N4). Benthic foraminiferal groups from all samples suggest deposition in outer neritic to upper bathyal environments. The estimated paleobathymetric ranges are about 390–1100 ft for RL19, 350 - 1630 ft for RL85, and 390 - 1230 ft for RL23. Even though the ages differ, the similarity in depositional environments hints at comparable marine bathymetric conditions in the study area. The differences in age suggest that the Bayah Formation and the Cijengkol Formation represent different depositional phases instead of a continuous stratigraphic sequence. This finding offers important insights into the stratigraphic framework and depositional evolution of the Bayah Dome region.
Karakteristik Petrografi dan Klasifikasi Satuan Batuan di Daerah Citorek, Kabupaten Lebak, Banten Zhafirah, Astrid; Febrim, Dwi Vina; Harnani, Harnani
Jurnal Penelitian Sains Vol 28, No 1 (2026)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v28i1.1351

Abstract

Daerah Citorek, Kabupaten Lebak, Provinsi Banten, tersusun oleh satuan batuan berumur Eosen Akhir hingga Miosen Awal yang memperlihatkan variasi litologi vulkani klastik, karbonat, dan vulkanik. Penelitian ini bertujuan untuk mendeskripsikan karakteristik petrografi serta menentukan klasifikasi batuan berdasarkan analisis sayatan tipis pada masing - masing satuan stratigrafi. Metode yang digunakan meliputi pemetaan geologi skala 1:25.000, pengambilan sampel representatif, preparasi sayatan tipis, serta penga matan mikroskopis menggunakan mikroskop polarisasi pada kondisi Plane Polarized Light (PPL) dan Cross Polarized Light (XPL). Penentuan klasifikasi mengacu pada Pettijohn (1975) untuk batuan klastik, Dunham (1962) dan Embry & Klovan (1971) untuk karbonat, serta klasifikasi IUGS (1989) untuk batuan beku. Hasil analisis menunjukkan bahwa satuan Eosen Akhir Formasi Cikotok (Temv) didominasi fragmen kaca vulkanik ±70-80% dengan tekstur matrix supported dan sortasi buruk, sehingga diklasifikasikan sebagai vitric tuff. Satuan Oligosen Awal - Akhir anggota napal Formasi Cijengkol (Tojm) tersusun atas ma terial lempung dominan yang termasuk mudrock. Anggota batugamping Formasi Cijengkol (Tojl) menunjukkan tekstur floatstone dengan kandungan bioklas ±40-50%. Sementara itu, satuan Miosen Awal Formasi Cimapag (Tmc) memperlihatkan tekstur porfiritik dengan dominasi plagioklas dan diklasifikasikan sebagai lava andesit.
Co-Authors Ahmad, Salsabiila Fadhilah Harnani Harnani, Harnani Putri, Adisty Merisya Zhafirah, Astrid