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All Journal Bulletin of Scientific Contribution : Geology Buletin Sumber Daya Geologi Journal of Geosciences and Applied Geology
Reza Mohammad Ganjar Gani
Fakultas Teknik Geologi, Universitas Padjadjaran
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science

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ANALISIS SKEMA PENGENDAPAN FORMASI PEMATANG DI SUB-CEKUNGAN AMAN UTARA, CEKUNGAN SUMATERA TENGAH SEBAGAI BATUAN INDUK. Gani, Reza Mohammad Ganjar; Firmansyah, Yusi
Bulletin of Scientific Contribution Vol 15, No 1 (2017): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (700.61 KB)

Abstract

ABSTRAKAnalisis  Formasi Pematang sebagai salah satu penghasil batuan induk di Sub-Cekungan Aman Utara, Cekungan Sematera Tengah merupakan hal yang menarik untuk dikaji, bagaimana Formasi Pematang ini terendapkan dengan mekanisme cekungan belakang busur dengan sistem pengendapn syn-rift menjadi salah satu Formasi yang dikenal sebagai penghasil batuan induk yang baik. Objek penelitian terfokus pada pustaka tentang kondisi geologi, stratigrafi regional daerah penelitian dengan fokus pada grup Formasi pematang dan data seismik daerah penelitian yang nanti akan saling berkaitan.Pada penampang seismik memperlihatkan struktur sesar batas dan sesar-sesar penyerta yang berarah relatif Baratlaut - Tenggaradan geometri antiklin pada blok footwall yang kemungkinan bisa  menjadi perangkap minyak di daerah penelitian.  Formasi yang dapat berperan menjadi batuan induk selain Formasi Brown Shale adalah Formasi Lower Red Bed, karena di beberapa sumur formasi ini memperlihatkan parameter potensi, kualitas dan kematangan yang cukup baik.Kata kunci: seismik stratigrafi, rift-system, Grup PematangABSTRACTPematang Formation as a source rocks potential at North Aman Sub-Basin, Central Sumatra Basin it is interesting to learn, how Pematang Formation formed with syn-rift mekanism is prooved that Pematang Formation is one of the source rocks potential. The object research focused about geological condition, regional stratigraphy with main research at Pematang Formation which related to be analysed. Seismic shows fault system as a border fault with relative northwest – southeast direction with anticlyne geometry at footwall analyzed for the play at research area. Beside Brown Shale Formation which is has a good potential as source rocks, we have a Lower Red Bed Formation also good potensial as a source rocks showed good on potential, quality and matureness.Keywords: stratigraphy seismik, rift-system, Pematan Group, Geochemistry
LANDSLIDE VULNERABILITY ZONE USING ANALYTICAL HIERARCHY PROCESS (AHP) METHOD IN BANYURESMI VILLAGE, SUKASARI DISTRICT, SUMEDANG, WEST JAVA Ryonaldo Rizqi, Muhammad Ibrahim; Iskandarsyah, T. Yan Waliana Muda; Athallah, Muhammad Nabiel Nahensa; Renardi, Raditya Ahmad; Ganjar Gani, Reza Mohammad
Bulletin of Scientific Contribution Vol 24, No 1 (2026): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v24i1.69895

Abstract

Landslides are a common natural disaster in Indonesia, especially in Banyuresmi Village, Sukasari District, Sumedang Regency, which is a research area covering 9.58 . This study aims to identify landslide vulnerability zones using the Analytical Hierarchy Process (AHP) method. This method is used in decision making by compiling a process hierarchy structure, a pairwise comparison matrix, class and subclass weighting analysis, and a consistency ratio (CR) test. The method was applied to evaluate and spatially overlay the controlling factors of landslide vulnerability, namely slope gradient, lithology, aspect (slope direction), land cover, and distance from streams. The results showed that the study area was predominantly classified as having moderate to high vulnerability, with the high vulnerability zone covering 60.94% of the area, the moderate vulnerability zone covering 38.38%, and the low vulnerability zone covering only 0.68%. Slope gradient was identified as the dominant factor, followed by lithology and aspect. Field validation confirmed a strong spatial correlation between the mapped high-risk zones and the actual locations of reported landslides, demonstrating the reliability of the method through field validation. Overall, this study provides a scientific basis and recommendations for land use planning, minimizing the risk of landslides, and mitigation strategies, especially in residential areas in Banyuresmi Village.Keywords: Analytical Hierarchy Process, Banyuresmi, Landslide, Sumedang, Slope
Co-Authors Adithya Ramadhani Hasibuan Adycipta, Adycipta Aldrin Ramadian Arbi, Hafsanjani Athallah, Muhammad Nabiel Nahensa Bombom Rachmat Suganda, Bombom Rachmat Bumolo, Firman Ardiansyah Darmawan, Muhammad Farhan Dicky Muslim Djadjang Jedi Setiadi Dwi Hadian, Mohammad Sapari Efendi, Tri Septianto Emi Sukiyah Fachrudin, Kurnia Arfiansyah Fathin, Muhammad Kayis Husaeni, Ahmad Iskandarsyah, T. Yan Waliana Muda Juniarto, Reinaldi Kurniawan, Endy Lia Jurnaliah M. Dwiki Satrio Muhammad Kurniawan Alfadli Nisa Nurul Ilmi Nurdeani, Rifky Nurdrajat Nurdrajat Nurdrajat, Aji Nurfadli, Eza Putra, Andri Perdana Putri, Nisrina Nadellia Renardi, Raditya Ahmad Restu, Abigail Ryonaldo Rizqi, Muhammad Ibrahim Sendjadja, Yoga Andriana Setiawan, Iwan Fahlevi Syaiful Alam Undang Mardiana Yusi Firmansyah, Yusi