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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Jurnal RISET Geologi dan Pertambangan Geoscience Journal Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Buletin Sumber Daya Geologi Indonesian Journal on Geoscience Indonesian Journal on Geoscience Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Journal of Geosciences and Applied Geology

Euis Tintin Yuningsih

Fakultas Teknik Geologi, Universitas Padjajaran

Author-ID : 425780

Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Physics

Published : 70 Documents Claim Missing Document

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Geokimia Endapan Nikel Laterit di Tambang Utara, Kecamatan Pomalaa, Kabupaten Kolaka, Provinsi Sulawesi Tengara Riko Ardiansyah Indra Kusuma; Hashari Kamaruddin; Mega Fatimah Rosana; Euis Tintin Yuningsih
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 2 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i2.418

Pomalaa is administratively located in Kolaka Regency, Southeast Sulawesi Province. The nickel mining business area in Pomalaa is managed by State-Owned Enterprises and Private Enterprises. Pomalaa is a sub-district that has natural resources in the form of nickel. Nickel Laterite deposits is a result weathering of ultramafic rock that is leaching process and accumulates in the supergen enrichment zone. The lateritization factor is controlled by lithology, morphology, and structure. In general, the profile of laterite nickel deposits in the North Mine area from top to bottom consists of top soil, limonite, saprolite, and bedrock zones. The laterite nickel precipitate in the North Mine shows varying thickness, based on color, texture, size and mineral composition. Laterite deposits from drilling results reaches an range of 25 - 30 meters. Soil and rocks sampling from each laterite zone every meter resulting from drilling are carried out by laboratory testing using XRF (X-Ray Fluorescence) analysis method with 283 total sample. High Ni element show enrichment in the saprolite zone, whereas in the high Fe (iron) element in the limonite zone.Keywords: nickel, laterite, geochemical, Pomalaa

Magmatic Evolution and Plumbing System of Gede-Salak Volcano, Banten, Indonesia Muhammad Alfath Salvano Salni; Euis Tintin Yuningsih; Tsukasa Ohba
Indonesian Journal on Geoscience Vol. 10 No. 2 (2023)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.10.2.245-276

The study of individual volcanoes in northwest Java has been largely overlooked. In this study, an investigation of the magma evolution and plumbing system of Gede-Salak Volcano was conducted. A geological survey determined the lava unit and volcanism. The whole-rock geochemistry is utilized to determine the magma type and evolution. Mineral chemistry based on microprobe analysis revealed the magmatic process and phenocryst origin. Geothermobarometry is employed to estimate the temperature and pressure. The volcanism comprised the eruption of lava flows, sector collapse, and the eruption of lava domes. The magma evolution consists of two magma types: type A (lava flow and peripheral dome) and type B (summit dome). The processes identified are amphibole fractionation, magma mixing, and crust assimilation. Phenocryst textures and chemistry implied open-system processes inthe plumbing system involving three magma series, namely the felsic, intermediate, and mafic series. Magma type A resulted from multiple mafic recharges on the felsic series, while type B resulted from the mixing of intermediate and mafic series. The felsic and intermediate phenocryst crystallization occurred at 933-948°C and 1010-1011°C in the mid-crust at 14 km to 17 km depth. Meanwhile, the mafic series reside in the lower crust at 21 km depth and of 1065-1087°C temperature. Keywords: Gede-Salak, magma evolution, magma plumbing, geothermobarometry, mineral chemistry

ANALISIS SEBARAN LOGAM TANAH JARANG UNTUK PENGEMBANGAN WILAYAH PERTAMBANGAN MENGGUNAKAN CITRA LANDSAT-9 DI KABUPATEN BANGKA SELATAN: ANALYSIS OF RARE EARTH METAL DISTRIBUTION FOR MINING AREA DEVELOPMENT USING LANDSAT-9 IMAGES IN SOUTH BANGKA REGENCY Sulka Wijaya; Mega Rosana Fatimah; Euis Tintin Yuningsih; Armin Tampubolon
Buletin Sumber Daya Geologi Vol. 18 No. 2 (2023): 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.v18i2.409

The development of high technology currently relies heavily on rare earth elements (REE), some of which are obtained from tin ore mining. The largest production of tin ore is located in the Bangka Belitung Islands. To assess this potential further, this research aims to provide direction for development. The focus of this research centers on Monazite, which has the potential to be processed into rare earth elements, currently in high demand across various global industries and expected to see increasing demand. Monazite is a by-product of tin ore processing. Tin mining in Bangka Island, in general, and South Bangka Regency, in particular, has a long history dating back to the Dutch occupation period and continues to the present day. Geologically, the presence of Triassic-age granite is associated with tin formation, stretching from the Peninsula of Thailand-Malaysia-Riau Islands to Bangka-Belitung and West Kalimantan, known as the Granite Tin Belt. This is indicated by the presence of associated minerals such as Monazite, Xenotime, and zircon, which play a strategic role as REE sources. Regions abundant in mineral resources require proper regional planning to ensure optimal management and utilization. This study refers to the research results conducted by the Coal and Geothermal Mineral Resources Center (PSDMBP) in 2009, 2014, and 2018, which were compared with Landsat-9 images. The purpose of this research is to identify potential areas suitable for developing the Rare Earth Elements (REE) mining industry in South Bangka. The research methodology employs qualitative descriptive analysis and spatial analysis. The analysis results indicate the suitability of spatial utilization for mining activities in Rindik Village and Keposang Village, confirmed through on-site sampling to substantiate their potential. The presence of Monazite in over 50% of the total tailings samples suggests that the area can be developed into a Mining Business Area for REE commodities

Petrogenetic of Igneous Complex of Ilota Nanasi Gold Deposit, Gunung Pani, Gorontalo, Indonesia Rompo, Iryanto; Ismail, Fajar; Santoso, STJ Budi; Rosana, Mega Fatimah; Yuningsih, Euis Tintin
Journal of Geoscience, Engineering, Environment, and Technology Vol. 8 No. 4 (2023): JGEET Vol 08 No 04 : December (2023)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2023.8.4.14250

Ilota Nanasi Au-Ag deposit located in the western flank of the Gn. Baganite, a part rhyodacite dome in Gn. Pani district, Gorontalo Province, where the extensive exploration programs were carried out by PT Gorontalo Sejahtera Mining (a subsidiary of PT J Resources Nusantara) from 2012 – 2020. As the result, a total of 72.7 Mt @ 0.98 g/t Au and 0.85 g/t Ag (2.3 Moz Au and 2.6 Moz Ag) mineral resource was delineated in 2019. This paper mainly aimed to the petrogenesis association of granitoid basement and rhyodacite unit as the host rock in the Ilota Nanasi gold deposit. The geology of Ilota Nanasi is overlain by Late Miocene granodiorite, andesite and diorite basement, Pliocene volcanic complex predominantly dacite – rhyodacite, tuff, breccia, and quaternary deposit as alluvial and surface breccia. Hydrothermal alteration and gold – silver mineralization centered in the porphyritic rhyodacite host rocks where the intense silicification forming a zone around the hydrothermal crackle breccia unit and/or high-density quartz vein, veinlets and stockworks. Mineralization in Ilota Nanasi is interpreted as a low sulfidation epithermal system dominated by a large volume of hydrothermal crackle breccia, intense quartz veining, veinlets, and high-density fracturing. A combined analytical result of petrography and whole-rock geochemistry has been used to assess the petrogenetic association of the rhyodacite and granitoid basement in the Ilota Nanasi. The result of the AFM diagram plot shows sample trends in calc-alkaline magma field. In contrast, the SiO2 – K2O plot distributed in two trends: the older unit was associated with high-K calc-alkaline and the shoshonite series for the younger unit. The changing of magma series is considered as product of crystallization differentiation of evolved parental magma or derived from the melting of mantle material after the mantle or lower crustal was metasomatized during a former episode of subduction.

STRUCTURAL CONTROL OF ALTERATION AND MINERALIZATION IN PROSPECT “X-Y”, POHUWATO REGENCY, GORONTALO PROVINCE Wirdan, Muhammad Faisal; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Rompo, Ahmad Iryanto; Ismail, Fajar
Journal of Geological Sciences and Applied Geology Vol 5, No 3 (2021): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v5i3.35791

The prospect “X-Y” is located in Gorontalo Province, a part of “gold district” with NW-SE arc-normal, E-W arc-parallel, and NS-NNE subsidiary lineament features and localize geological setting in the northern arm of Sulawesi. Regional geology of Sulawesi's northern arm is characterized of volcanoplutonic magmatic by typical Eocene to Recent island-arc assemblages (Hamilton, 1979). An older basement composed of granodiorite occurs in the north of the study area (Kavalieris, 1984). The study was conducted using variety of approaches, including desk top study, field mapping, and data interpretation. Desktop study are focused on lineament and fault fracture density interpretation. Field mapping include observation, measurement, and structure interpretation. Gold mineralization in the prospect “X-Y” are hosted in porphyritic dacite, lapilli tuff, and diatreme breccia unit. The type of mineralization generated epithermal low sulphidation with anomalous mineralization. It has the feature of a high fault-fracture density range of 2100-3200 m/

IDENTIFICATION OF MASS MOVEMENT VULNERABILITY ZONES USING STORIE METHOD IN BARUNAI AND SURROUNDING AREAS, LEBAK REGENCY, BANTEN PROVINCE Hutauruk, Gita Agnes Meilani; Yuningsih, Euis Tintin; Patonah, Aton; Arfiansyah, Kurnia
Journal of Geological Sciences and Applied Geology Vol 8, No 2 (2025): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v8i2.58072

Natural processes cause mass movement when slope materials, such as soil, rock, and mixed materials, shift from their original positions in a vertical, horizontal, or inclined orientation. A number of factors, including a relatively steep slope, the status of the rock or soil that forms the slope, intense rainfall, unchecked human activity that exploits the environment, and the state of geological structures, contribute to the movement. The research site is located in Cihara District, Lebak Regency, Banten Province, specifically in the Barunai area. Because of their proximity to fault lines and subduction zones, these study areas are susceptible to mass movement, particularly during the wet season. The goal of this study is to pinpoint the regions that are most vulnerable to mass movement. By determining the parameter that is thought to influence mass movement, the Storie method is one technique used to pinpoint the places that are vulnerable to it. The parameters include factors like land usage, type of soil, rainfall, slope, lithology, and geological structures. The research locations are categorized into two levels of mass movement vulnerability based on the analysis result: high, as much as 34.1%, and moderate as much as 65.9%, across the entire research region.

KARAKTERISTIK BATUAN ASAL PEMBENTUKAN ENDAPAN NIKEL LATERIT DI DAERAH MADANG DAN SERAKAMAN TENGAH Euis Tintin Yuningsih, Luhur Pambudi H., Adi Kurniadi, Mega Fatimah Rosana,
Geoscience Journal Vol 2, No 3 (2018): Padjadjaran Geoscience Journal
Publisher : Unpad

Salah satu faktor yang mempengaruhi pembentukan endapan nikel laterit adalah batuan asal. Pokok permasalahan yang akan di bahas pada penelitian ini adalah di fokuskan pada karakteristik batuan asalnya yaitu pada batuan ultrabasa berdasarkan intensitas serpentinisasinya, mineral penyusunnya, dan geokimia batuan pada sampel outcrop di lapangan serta kaitannya dengan potensi lateritisasi endapan nikel pada data sekunder yaitu pada data pemboran di daerah Madang dan Serakaman Tengah, Pulau Sebuku,Kalimantan Selatan. Metode penelitian yang di lakukan adalah dengan studi literatur, pemetaan geologi, analisis petrografi, serta analisis geokimia (elemen major berdasarkan metode X-Ray Fluoresence). Berdasarkan analisis perografi, karakteristik batuan asal pada batuan ultrabasa yaitu intensitasserpentinisasinya dominan tinggi, kemudian mineral utama penyusunnya adalah serpentin, olivine, orthopiroksen, klinopiroksen, mineral opak, dan mineral oksida. Secara geokimia batuan, unsur MgO lebih banyak kelimpahannya dibandingkan dengan unsur CaO dan Al2O3, menunjukan mineral utama nya yaitu olivine dan piroksen. Di interpretasikan pula fraksionasi utamanya adalah mineral olivine dan protolit batuannya di dominansi oleh dunit. Lateritisasi endapan nikel terdapat pada zona saprolit dalam suatu profil endapan nikel laterit. Di daerah Madang dan Serakaman Tengah mempunyai endapan nikel laterit yang cukup baik dan ekonomis meskipun kadar endapan nikel dan ketebalan zona saprolitnyarelatif berbeda-beda.Kata kunci : Batuan asal, serpentinisasi, mineral penyusun, geokimia, endapan nikel laterit

KARAKTERISTIK BATUAN ASAL PEMBENTUKAN ENDAPAN NIKEL LATERIT DI DAERAH MADANG DAN SERAKAMAN TENGAH Euis Tintin Yuningsih,Luhur Pambudi., Adi Kurniadi,Mega Fatimah Rosana,
Geoscience Journal Vol 1, No 2 (2017): Padjadjaran Geoscience Journal
Publisher : Unpad

Salah satu faktor yang mempengaruhi pembentukan endapan nikel laterit adalah batuan asal. Pokok permasalahan yang akan di bahas pada penelitian ini adalah di fokuskan pada karakteristik batuan asalnya yaitu pada batuan ultrabasa berdasarkan intensitas serpentinisasinya, mineral penyusunnya, dan geokimia batuan pada sampel outcrop di lapangan serta kaitannya dengan potensi lateritisasi endapan nikel pada data sekunder yaitu pada data pemboran di daerah Madang dan Serakaman Tengah, Pulau Sebuku, Kalimantan Selatan. Metode penelitian yang di lakukan adalah dengan studi literatur, pemetaan geologi, analisis petrografi, serta analisis geokimia (elemen major berdasarkan metode X-Ray Fluoresence). Berdasarkan analisis perografi, karakteristik batuan asal pada batuan ultrabasa yaitu intensitas serpentinisasinya dominan tinggi, kemudian mineral utama penyusunnya adalah serpentin, olivine, orthopiroksen, klinopiroksen, mineral opak, dan mineral oksida. Secara geokimia batuan, unsur MgO lebih banyak kelimpahannya dibandingkan dengan unsur CaO dan Al2O3, menunjukan mineral utama nya yaitu olivine dan piroksen. Di interpretasikan pula fraksionasi utamanya adalah mineral olivine dan protolit batuannya di dominansi oleh dunit. Lateritisasi endapan nikel terdapat pada zona saprolit dalam suatu profil endapan nikel laterit. Di daerah Madang dan Serakaman Tengah mempunyai endapan nikel laterit yang cukup baik dan ekonomis meskipun kadar endapan nikel dan ketebalan zona saprolitnya relatif berbeda-beda.Kata kunci : Batuan asal, serpentinisasi, mineral penyusun, geokimia, endapan nikel laterit

KETERDAPATAN BAHAN GALIAN GALENA DI DAERAH CIGEMBLONG, KABUPATEN LEBAK, PROPINSI BANTEN -, Mega Fatimah Rosana; -, Euis Tintin Yuningsih; -, Adi Hardiyono
Bulletin of Scientific Contribution Vol 5, No 3 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The objective of the research is to identified and investigated the occurrence of lead, its distribution, size, formation, quantity and quality in the district of Cigemblong, regency of Lebak, province of Banten as a guide for advance investigation. Several samples collected and analyzed petrographically to identified rock, alteration and ore mineral variation as well as geochemistry analysis by XRF method.The stratigraphic units of the research area can be classified into three rock units, such as from oldest to youngest one are carbonaceous claystone, tuf, andesitic – dioritic intrusive, and volcanic breccia units. Three alteration types in the research are are prophylitic, argillic, and silicification alteration.Field investigation concluded that mineralization occurred as mineralization zone of quartz veins with N – S and NE – SW direction, partially as thin lensing in claystone unit. Otherwise the distribution are limited, and separated each other. So, it is difficult to trace the vein zone and lensing as same vein.The characteristic of the mineralization zone gangue minerals dominated composed of quartz, calcite and clay mineral, with ore minerals of pyrite

KARAKTERISTIK MINERALOGI ENDAPAN PASIR BESI DI DAERAH GALELA UTARA KABUPATEN HALMAHERA UTARA PROVINSI MALUKU UTARA Lamburu, Ahadi Ahmat; Syafri, Ildrem; Yuningsih, Euis Tintin
Bulletin of Scientific Contribution Vol 15, No 2 (2017): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRAKDaerah Galela Utara berada di pulau Halmahera Bagian Utara yang masuk ke dalam Kabupaten Halmahera Utara, provinsi Maluku Utara. Daerah penelitian ini berada pada daerah pantai dataran rendah di wilayah Halmahera Utara yang termasuk dalam Mandala Halmahera Barat. Morfologi dataran rendah yang berada di bagian timur pantai Halmahera membentang dari utara sampai selatan, yang memiliki potensi endapan pasir besi utamanya berada pada endapan aluvium. Mandala geologi Halmahera Barat sangat identik dengan sebaran batuan gunungapi dalam hal ini aktifitas vulkanisme, beberapa gunungapi yang masih aktif hingga sekarang ini. Formasi Bacan merupakan batuan yang terdiri dari breksi dengan komponen terdiri dari andesit dan basal serta batugamping dan lava sangat berkaitan dengan batuan sumber utama pembawa endapan pasir besi. Penelitian dilakukan berdasarkan metode analisis data dengan pendekatan statistik deskripsi univarian yang dinyatakan menggunakan tabel frekuensi dan histogram. Analisis parameter terdiri dari besar butir/ayak dan mineralogi butir. Sebaran endapan pasir besi di daerah penelitian yang diidentifikasi pada jumlah titik bor yang tersebar di bagian utara, blok tengah dan selatan. Penyebaran mineral magnetit sangat bervariasi yang tersebar banyak di bagian utara secara presentase sebesar 28.41%, dan di blok tengah sebaran magnetik sebesar 18.63% sedangkan yang ke arah bagian selatan sebesar 13.03%. Batuan ultramafik yang memiliki kandungan mineral-mineral berat yang kaya akan unsur-unsur Fe (besi/iron) dan Mg (magnesium) untuk kemungkinan berasal dari Formasi Bacan (Tomb) yang terdiri dari breksi dan lava dengan komponen andesitik serta basal dan Batuan Gunungapi Holosen (Qhva) terdiri dari lava dan breksi yang bersusunan andesit sampai basal. Kata Kunci : Magnetit, Mineralogi, Pasir Besi

Co-Authors Adi Hardiyono Agus Didit Haryanto Agus Didit Haryanto -, Agus Didit Haryanto Ahadi Ahmat Lamburu Akhmad Fauzan Al Adawiah, Nabila. Anna Yushantarti, Anna Arie Noor Rakhman Arief Nur Muchamad Armin Tampubolon Asep Nurdin, Asep Asri Arifin Aton Patonah Bensaman, Benny Bensaman, Benny. Boy Yoseph Cahya Sunan Sakti Syah Alam Bronto Sutopo, S.T., Dipl. Geoth. En., P DEWI FITRIANI Dewi Gentana Dicky Muslim Electricia, K.S. Emi Sukiyah F, Kurnia. Arfiansyah F. G, Aiwoy Fachrudin, Kurnia Arfiansyah Faizal, Reza Mochammad Faizal, Reza Mochammad Fiandri Indra Rinawan Fiandri Indragunawan Rinawan Fivry Wellda Maulana Haris Siagian Hashari Kamaruddin Hashari Kamaruddin Heriawan, Mohammad N Heru Sigit Purwanto Hiroharu Matsueda Hiroharu Matsueda Hiroharu Matsueda Hutauruk, Gita Agnes Meilani Ildrem Syafri Imam Santosa Indra Kusuma, Riko Ardiansyah Indrakususma, Riko Ardiansyah Indrakususma, Riko Ardiansyah Ismail, Fajar Kamaruddin, Hashari Kamaruddin, Hashari Kemala Wijayanti Kemala Wijayanti, Kemala Kurnia Arfiansyah, Kurnia Matsueda, Hiroharu Matsueda, Hiroharu Mega F. Rosana Mega F. Rosana, Mega F. Mega Fatimah Rosana Mega Fatimah Rosana Mega Fatimah Rosana Mega Rosana Fatimah Meiriyanto, Fernandy Mohamad Nur Heriawan Mohammad N Heriawan Muhammad Alfath Salvano Salni Nada Salsabila Deva Nana Sulaksana Nana Sulaksana Nana Sulaksana Purbiyantoro, Aldila Jasmine Purwaiswanto, Bambang Antoro Raden Isnu Hajar Sulistyawan Raden Isnu Hajar Sulistyawan, Raden Isnu Hajar Reza Mochammad Faizal Riko Ardiansyah Indra Kusuma Riko Ardiansyah Indrakususma Rinawan, Fiandri Indra Rinawan, Fiandri Indra Rinawan, Fiandri Indragunawan Rinawan, Fiandri Indragunawan Rompo, Ahmad Iryanto Rompo, Iryanto Rosana, M.Sc., Ph.D, Prof. Ir. Mega Fatimah Rosana, Mega F. Ruswanto, . Saala, Nur Afrianti Santoso, STJ Budi Saputra, Dwie H. Selasian Gussyak Soepriadi Soepriadi Soepriadi, Soepriadi Soepriadi, Soepriadi Sulka Wijaya Sutopo, S.T., Dipl. Geoth. En., P, Bronto Sutopo, S.T., Dipl. Geoth. En., P, Bronto Tampubolon, Armin Triyunita, Ade Tsukasa Ohba Viqnoriva, S.N. Wirdan, Muhammad Faisal Yuano Rezky, Yuano Zufialdi Zakaria

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