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All Journal Bulletin of Scientific Contribution : Geology Journal of Geoscience, Engineering, Environment, and Technology Buletin Sumber Daya Geologi Jurnal Geominerba Journal of Geosciences and Applied Geology
Aton Patonah, Aton
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Physics Other

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KARAKTERISTIK BATUAN SEDIMEN DI HILIR SUNGAI CI GANGSA, KECAMATAN SURADE, KABUPATEN SUKABUMI, JAWA BARAT Maulana, Muhammad Hafidz; Pratiwi, Santi Dwi; Patonah, Aton
Bulletin of Scientific Contribution Vol 23, No 1 (2025): 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.v23i1.62938

Abstract

Kawasan Ciletuh memiliki keragaman geologi yang kompleks. Keragaman ini merupakan hasil dari berbagai fenomena geologi yang telah terjadi sejak zaman Kapur. Salah satu keragaman geologi yang dimiliki oleh daerah Ciletuh adalah keragaman jenis batuan penyusun Formasi Jampang. Tujuan penelitian ini adalah untuk mengidentifikasi karakteristik batuan sedimen yang terdapat pada Anggota Cikarang dari Formasi Jampang. Metode yang digunakan mencakup observasi lapangan di bagian hilir Sungai Ci Gangsa dan analisis petrografi terhadap beberapa sampel batuan. Hasil penelitian menunjukkan bahwa terdapat tiga jenis batuan, antara lain batupasir (feldspathic wacke), tuf (lithic tuff), serta batugamping (packstone dan wackestone). Komposisi dari tiap batuannya menunjukkan adanya campuran material, meliputi material silisiklastik, vulkanik, dan karbonat. Hal ini dapat mengonfirmasi kondisi ketika pengendapan berlangsung, kemungkinan berupa lingkungan laut yang dipengaruhi oleh aktivitas vulkanik.Kata Kunci : Anggota Cikarang dari Formasi Jampang, Batuan Sedimen, Petrografi, Sungai Ci Gangsa, Ciletuh, Miosen.
STUDI BATUGAMPING BERDASARKAN KANDUNGAN FORAMINIFERA BESAR DI DAERAH CIRACAP, KABUPATEN SUKABUMI, PROVINSI JAWA BARAT, INDONESIA Silalahi, Natha Nuel; Pratiwi, Santi Dwi; Patonah, Aton
Bulletin of Scientific Contribution Vol 23, No 1 (2025): 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.v23i1.62890

Abstract

Daerah penelitian secara geografis terletak pada koordinat 106°28'0“ BT - 106°30′30” BT dan 7°18'30“ LS - 7°21′0” LS, Kecamatan Ciracap, Kabupaten Sukabumi, Provinsi Jawa Barat. Fokus penelitian ini adalah Batugamping Formasi Cibodas di daerah Ciracap dengan menggunakan analisis foraminifera bentonik besar dengan tujuan untuk menganalisis korelasi antara jenis batugamping dengan kelimpahan foraminifera besar. Metode penelitian yang digunakan adalah observasi lapangan, termasuk pengukuran penampang, dan analisis petrografi. Hasil dari penelitian ini menunjukkan bahwa terdapat dua litologi yang berbeda yang ditemukan pada Formasi Cibodas, yaitu Packstone dan Grainstone. Selain itu, dari hasil pengamatan petrografi, ditemukan 12 spesies foraminifera besar yang dapat diidentifikasi. Setelah dilakukan penarikan umur, didapatkan umur batugamping Formasi Cibodas berada pada kisaran Tf3-Th (Miosen Akhir-Pliosen Awal). Berdasarkan analisis data, dapat disimpulkan bahwa kelimpahan foraminifera secara signifikan lebih tinggi pada batugamping packstone dibandingkan dengan grainstone. Packstone terbentuk di lingkungan yang tenang dan berenergi rendah, dengan kandungan lumpur yang cukup banyak. Lumpur ini kaya akan nutrisi, sehingga mendukung kehidupan dan pelestarian foraminifera besar sedangkan grainstone terbentuk di lingkungan energi tinggi dengan arus dan gelombang kuat yang menghambat akumulasi lumpur serta kurang mendukung untuk pelestarian foraminifera bentonik besar. Lingkungan pengendapan berada di zona terumbu hingga dasar laut.Kata Kunci: Ciracap, Cibodas, Foraminifera Besar, Packstone, Grainstone, Terumbu
KONTROL STRUKTUR TERHADAP ALTERASI DAN MINERALISASI PADA CEBAKAN EPITERMAL PROSPEK SECANG, KECAMATAN CAMPUR DARAT, KABUPATEN TULUNG AGUNG, PROVINSI JAWA TIMUR: STRUCTURAL CONTROL ON ALTERATION AND MINERALIZATION OF EPITHERMAL DEPOSIT SECANG PROSPECT, CAMPUR DARAT SUB DISTRICT, TULUNG AGUNG DISTRICT, EAST JAVA PROVINCE Fadilah, Rizqi; Vanessa, Agata; Patonah, Aton; Haryanto, Iyan
Buletin Sumber Daya Geologi Vol 20 No 2 (2025): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v20i2.519

Abstract

The study area is located within the administrative district of Campurdarat Subdistrict, Tulungagung Regency, East Java Province. This research aims to analyze the role of geological structures on alteration and mineralization processes using geological and alteration mapping method, joint measurement, petrographic and mineragraphic analysis, and spectral data interpretation. The geological mapping results indicate that the lithostratigraphy of the study area, from youngest to oldest, consists of Alluvial Unit (Sa), Limestone Unit (Sbg), Volcanic Breccia Unit (Sbv), and Andesite Lava Unit (Sla). The geological structures include faults and joints, formed through a wrench fault mechanism, indicating left-lateral movement with the formation of a transpressional pop-up structure. Alteration zones belong to the high-sulfidation epithermal deposit system, consisting of four alteration types, comprising silicifaction, advanced argillic, argillic, and propylitic. Mineralization in the study area is associated with veins and vuggy quartz. Ore minerals present include pyrite, chalcopyrite, sphalerite, marcasite, magnetite, rutile, and covellite. Alteration and mineralization in the study area are controlled by northeast-southwest and northwest-southeast strike-slip faults. Faults in the study area have caused alteration overprinting and fault zones.
KARAKTERISTIK FISIK, GEOKIMIA DAN SEBARAN ENDAPAN NIKEL LATERIT DAERAH LOJI BEACH, PULAU OBI, KABUPATEN HALMAHERA SELATAN, PROVINSI MALUKU UTARA: PHYSICAL, GEOCHEMICAL CHARACTERISTICS AND DISTRIBUTION OF NICKEL LATERITE DEPOSITS IN THE LOJI BEACH AREA, OBI ISLAND, SOUTH HALMAHERA DISTRICT, NORTH MALUKU PROVINCE Trisusanti, Eliana; Patonah, Aton; Hardiyono, Adi; Matano, Alan
Buletin Sumber Daya Geologi Vol 20 No 1 (2025): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v20i1.523

Abstract

Indonesia is one of the largest nickel producing countries in the world. One of the nickel producing areas in Indonesia is in the Loji Beach area. This research area is located on Obi Island, South Halmahera Regency, North Maluku Province. Geologically, the research area is composed of ultramafic rocks. This research aims to determine the characteristics of nickel laterite and its relationship with geological conditions in the research area using petrographic methods of rock samples and XRF (X-Ray Fluorescence) geochemistry of drilling samples. Geochemical data in the form of Ni content from drill data was interpolated using the IDW method using ArcGIS software. Based on research results, Ni-laterite is abundant in the morphology of gentle hills with a slope of 0-7%. The base rock bearing Ni-laterite is thought to be serpentinite from the serpentinization of harzburgite and dunite. Based on petrographic analysis, the bedrock is composed of >85% serpentine, the rest is relict minerals olivine and orthopyroxene, as well as other minerals such as talc, oxide minerals and opaque. The results of geochemical analysis show that in the limonite zone there is an abundance of Fe elements, while in the saprolite zone the Ni element is enriched with levels of 1.5% -2.8%.
Characteristic of Mineral Alteration of Geothermal in Endut Mount Based on Petrography, Spectra, XRD, and MeB methods Patonah, Aton; Ramadhani, Rifqi Fadhil; Nurdin, Nizar M
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 1 (2026): JGEET Vol 11 No 01 : March (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.1.21933

Abstract

Endut Mount is one of the geothermal prospect locations in Indonesia. In order to optimize the geothermal potential of the research area, it is necessary to conduct research on geothermal characteristics. One such study is the examination of altered minerals in geothermal manifestations. The primary objective of this research is to conduct alteration investigations utilizing coring data obtained from the drilling of Well 1 by petrography, MeB, Spectra, and XRD method approaches. The result of the research shows that the lithology of this Well is a product of Endut Mount activity, with an intensity ranging from medium to strong. The lithology is composed of altered tuff and altered andesite breccia, which are a product of the Pleistocene period, and altered volcanic breccia and altered tuff breccia, which are a product of the Miocene period. This lithology is based on the oldest to the youngest succession. The alteration assemblages in Well 1 are classified into two zones based on the assemblage of alteration minerals: the illite-chlorite±epidote zone, which is located at a depth of 9.7– 40.9 MD, and the smectite-sericite-chlorite-epidote zone, which is located at a depth of 40.9 – 111.15 MD. The type of alteration in Well 1 is propylitic, with a neutral pH and a temperature range of 200oC to 300oC, as indicated by the mineral composition and alteration zone. This alteration zone has the potential to function as a reservoir zone.
Co-Authors abdurrohman, Muhammad jihad Adi Hardiyono, Adi Agung Mulyo Ahnaf, Jemi Saputra Alamsyah, Fadhli Alfadi, Muhammad Kurniawan Anna Yushantarti, Anna Asep Nurdin, Asep Bahtiar, Wisnu Indra DEWI FITRIANI Edi Tri Haryanto, Edi Tri Emi Sukiyah Euis Tintin Yuningsih Fadilah, Rizqi Faisal Helmi Faisal, Reza Mochammad Fauzi, Ridwan Nur Fazillah Adzka, Fazillah Haryadi Permana Hirose, Kazuyo Hutauruk, Gita Agnes Meilani Ichsan, Muhamad Ildrem Syafri Imaniar, Nurul Ismawan Ismawan, Ismawan Iyan Haryanto, Iyan Jodi Prakoso, Jodi Kurnia Arfiansyah, Kurnia Matano, Alan Maulana, Muhammad Hafidz Mega Fatimah Rosana Muhammad Nur Hadi Musyaffa, Muhammad Ayyasy Nurdin, Nizar M Pradnya P. Raditya Rendra Pradnya Paramarta Raditya Rendra Prambada, Oktory putera, alvindo andreansyah Ramadhani, Rifqi Fadhil Ramdhani, Muhammad Alfi Gilang Ridwan, Panji Riza Asyari Yamin, Riza Asyari Rosyid, Vendi Hakim Ar sabily, zulfa Santi Dwi Pratiwi Siahaan, Yakub Silalahi, Natha Nuel Simarmata S. L. Robertus, Simarmata S. L. Subagja, Agam Sulastri, Murni Taufik Ramadhan Taufiq Widiaputra, Taufiq Tresnasari, Endah Trisusanti, Eliana Vanessa, Agata Vijaya Isnaniawardhani Yuano Rezky, Yuano Yusuf, Muhammad Farhan Zufialdi Zakaria