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All Journal Jurnal Ilmiah Geologi pangea Scientific Contribution Oil and Gas
Antu Ridha Falkhan Barizi
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science

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RETRACTION: KAJIAN GEOLOGI DAN STABILITAS LERENG DENGAN FINITE ELEMENT METHODE (FEM) UNTUK PEMBANGUNAN DAN PENGEMBANGAN PERUMAHAN: BUKIT PANDHAWA GODEAN SLEMAN Guntor Surto Putro; Muhammad Nurjati Setiawan; Antu Ridha Falkhan Barizi; Jatmiko Setiawan
Jurnal Ilmiah Geologi PANGEA Vol 10, No 1 (2023): Jurnal Ilmiah Geologi PANGEA
Publisher : PROGRAM STUDI TEKNIK GEOLOGI FAKULTAS TEKNOLOGI MINERAL UPN VETERAN YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jigp.v10i1.10066

Abstract

(Artikel ini telah terbit pada Prosiding Sriwijaya Geology Festival 2021 tanggal 21 September 2021 ISBN : 978-979-587-999-2) Penelitian Kajian Geologi dan Stabilitas Lereng di Kawasan Bukit Pandhawa, Kecamatan Godean dilakukan untuk mengetahui gambaran detail geologi wilayah perumahan yang akan dikembangkan, kajian stabilitas lereng diperlukan karena pengupasan lereng yang beresiko longsor. Litologi yang dijumpai pada daerah ini berupa batupasir dari Formasi Nanggulan berumur Eosen (42-39,4 juta tahun yang lalu), breksi dari Formasi Kebo-Butak yang berumur Oligosen (33.9-23,3 juta tahun yang lalu) dan yang paling muda yaitu batuan beku intrusi diorit berumur Miosen Awal (25,2-16,2 juta tahun yang lalu) dan berdasarkan analisa petrografi didapatkan nama batuan Argilaceous Lithic Wacke (Gilbert, 1954) dan  batuan beku diorit. Struktur geologi yang berkembang pada daerah penelitian berupa kekar dan sesar. Struktur geologi berupa kekar memiliki arah umum sekitar barat-timur, utara-selatan, timurlaut-baratdaya dan tenggara-baratlaut. Struktur geologi berupa sesar memiliki arah umum bidang sesar relative timurlaut-baratdaya. Penelitian Stabilitas lereng pada daerah penelitian menggunaan metode elemen hingga (FEM dengan tujuan mengetahui nilai faktor keamanan, bidang gelincir, model longsoran dan desain lereng yang diolah dengan software Phase 2. Dengan mengetahui model longsoran peneliti membuat penanggulangan longsor sederhana serta merekomendasikan tindak lanjut bagi pengembang terhadap pembangunan dan pengembangan perumahan. 
Source Rock Potential of Nampol Formation Sumbermanjing Area, Malang, East Java, Indonesia Based on Geochemistry Analysis of the Selected Sample Carolus Prasetyadi; Achmad Subandrio; M. Gazali Rachman; Antu Ridha Falkhan Barizi; Muhammad Muslim
Scientific Contributions Oil and Gas Vol. 45 No. 1 (2022): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Nampol Formation of the Southern Mountains of eastern Java (Indonesia) has a distribution from its type location in Pacitan to the South Malang area. In the research area, this formation consists of clastic limestone with black shale inserts, claystone, siltstone, carbonate sandstone and claystone which are interpreted to be deposited in a restricted platform interior environment with closed water circulation. A total of three samples were analyzed to evaluate the organic matter content, kerogen type, thermal maturity, and hydrocarbon generating potential. Samples were taken from clastic carbonate deposits of the Nampol Formation. Based on the results of geochemical analysis, the three samples from the Nampol Formation have a TOC content of 3.48 - 26.18 wt% and possess good to excellent hydrocarbon generating potential. Hydrogen Index (HI) values for the studied samples ranged from 43 to 86 mg HC/g TOC and S1+S2 results ranged from 1.52 to 19.55 mg HC/g rock, indicating that the sample has the potential to produce gas. All three samples were dominated by Type III kerogen and were thus considered gas prone based on the HI vs. Tmax diagrams. The three samples were categorized as thermally immature based on Tmax pyrolysis analysis and Vitrinite Refl ectance (VR) values in the range of 0.44 to 0.46 % Ro. Based on the results obtained, the black shale and coal in the Nampol Formation has the capability to generate hydrocarbon but are considered as an immature source rock that can be predicted to produce gas at its peak maturity.
Co-Authors Achmad Subandrio Guntor Surto Putro Jatmiko Setiawan M. Gazali Rachman muhammad muslim Muhammad Nurjati Setiawan Prasetyadi, Carolus