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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 Padjadjaran

Author-ID : 425780

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

Published : 49 Documents Claim Missing Document

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Diagnostic Genesis Features of Au-Ag Selenide-Telluride Mineralization of Western Java Deposits Euis Tintin Yuningsih; Hiroharu Matsueda; Mega F. Rosana
Indonesian Journal on Geoscience Vol 3, No 1 (2016)
Publisher : Geological Agency

DOI: 10.17014/ijog.3.1.67-76The ore mineralogy of the westernmost part of West Java such as Pongkor, Cibaliung, Cikidang, Cikotok, and Cirotan are characterized by the dominance of silver-arsenic-antimony sulfosalt with silver selenides and rarely tellurides over the argentite, whereas the eastern part of West Java including Arinem and Cineam deposits are dominated by silver-gold tellurides. Mineralogy of Se-type deposits at Pongkor, Cikidang, Cibaliung, Cisungsang, and Cirotan and Te-type deposits at Arinem and Cineam shows their different geochemical characteristics. Mineralogical and geochemical differences can be explained by variation of physico-chemical conditions that existed during gold-silver deposition by applying the phase relation among sulfide, telluride, and selenide mineral association in the deposits. The relative values of ƒSe2(g), ƒTe(g), and ƒS2(g) control the actual presence of selenide or telluride minerals within the West Java deposits, which also depend on their concentrations in the hydrothermal fluid. Even though the concentration of selenium in the hydrothermal fluid of Te-type deposits might have been similar or even higher than that in the Se-type, early substitution of selenium in the sulfide minerals prevents its concentration in the hydrothermal fluid to the levels for precipitating selenide minerals. Therefore, early sulfide mineral deposition from reduction fluids will not increase the ƒSe2(g)/ƒS2(g) ratio to form selenide minerals in Te-type deposits of Arinem and Cineam, other than selenium-bearing sulfide mineral such as Se-bearing galena or Se-bearing pyrargyrite-proustite.

Morphotectonics of Mount Rendingan Area Related To the Appearances of Geothermal Surface Manifestations Dewi Gentana; Nana Sulaksana; Emi Sukiyah; Euis Tintin Yuningsih
Indonesian Journal on Geoscience Vol 6, No 3 (2019)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.6.3.291-309

DOI: 10.17014/ijog.6.3.291-309The researched area is situated at Mount Rendingan and its surrounding area, Lampung Province, the southern part of Sumatra Island. It has a big potential of geothermal resource in line with a unique graben like bowl landform and geothermal surface manifestations. This research was carried out using remote sensing and field observation methods. The remote sensing method used topography and Shuttle Radar Topography Mission -Digital Elevation Model (SRTM-DEM) maps to analyze morphotectonic attributes, and the result was validated by morphotectonic data analysis from field observation. The purpose of this research is to evaluate the relation between morphotectonic and the appearances of geothermal surface manifestations. The interpretation of SRTM-DEM and topographic maps are supported by morphotectonic analyses,which indicate that the geothermal surface manifestations in this area are controlled by tectonic activity. It has various levels of lift which are shown by the values of valley height weight ratio (Vf) from 0.16 to 3.31 and the values of mountain front sinuosity (Smf) from 1.05 to 2.09. The morphotectonic characteristics can describe the geological structure activity levels which are reflected in the landform and its rock. The volcanic areas consist of igneous rocks which have small primary permeabilities. However, the development of geological structure can cause fractures in the rock that step in as a medium for passing geothermal fluid from depth to surface. They are found on the fault intersection zone system trending NE-SW and NW-SE, NNE-SSW and NNW-SSE, and WE system directions that indicate the fault system is correlated with the appearances of geothermal manifestations.

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

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

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