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

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Karakteristik Jasper Merah di Pulau Jawa Bagian Selatan Berdasarkan Analisis SEM dan XRF Wijayanti, Kemala; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Sulistyawan, Raden Isnu Hajar
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (320.014 KB)

Abstract

Jasper is one type of microcrystalline silica which include to gemstone variety. Indonesia has a high potential of jasper because its variety and a huge number of jasper that widely spread in Indonesia. There are 3 (three) types of jaspers that usually found in Indonesia, red jasper, yellow jasper, and green jasper. Among three of them, red jasper is much more abundant especially in Southern Java.Therefore, this research was held to observe the differences of red jasper's characteristic in three places in Java, i.e., Bungbulang – Garut, Samigaluh – Yogyakarta, and Donorojo – Pacitan areas. To attain the purpose of this research, SEM analysis is used to compare their textures and XRF for the chemical compositions.The research concludes that the red jaspers from those three places have the same texture, the granulated texture which derived from quartz texture. The grain size seems to increased from west to east. From the chemical composition it can be seen that the red color of jasper is strongly affected by Fe, Cr, and V. The Ti elements of red jasper also increased from west to east because there is a high Ti content in Pacitan's red jasper and perhaps by the combination of those elements resulting the purple color in red jasper.Keywords - red jasper, gemstone, composition, element, Southern Java
COMPOSITIONAL VARIATIONS OF Au-Ag TELLURIDE MINERALS OF ARINEM DEPOSIT, WEST JAVA Yuningsih, Euis Tintin
Jurnal Geologi dan Sumberdaya Mineral Vol 21, No 3 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The epithermal Arinem veins system of gold-silver-base metal mineralization is located in the Arinem area in the southwestern part of Java Island, Indonesia. The veins are composed predominantly of quartz+calcite±illite±kaolinite with variable amount of manganese oxide and limonite and high amount of sulfides. The deposit contains a number of Te-bearing minerals, notably tellurides and tellurosulfide minerals. The tellurium mineral assemblages in the Arinem and Bantarhuni veins are similar in the presence of hessite (Ag2Te), petzite (Ag3AuTe2), stutzite (Ag5Te3), tetradymite (Bi2Te2S) dan altaite (PbTe). The tellurium mineral assemblages vary from sample to sample and most of the observed telluride occurrences consist of at least 2 different phases (e.g. petzite-hessite, tetradymite-hessite, petzite-hessite-altaite). Gold concentrations measured in Te-mineral of petzite from the Arinem vein are in the range between 14.24 to 18.32 wt%. Some hessite and stutzite contain gold up to 3.48 and 1.10 wt%, respectively. Some of electrums are present as inclusions in Te-mineral patches in both veins.Keywords : Electrum, petzite, sulfide, tellurides, Arinem, Bantarhuni
Geokimia Endapan Nikel Laterit di Tambang Utara, Kecamatan Pomalaa, Kabupaten Kolaka, Provinsi Sulawesi Tengara Indra Kusuma, Riko Ardiansyah; Kamaruddin, Hashari; Rosana, Mega Fatimah; Tintin Yuningsih, Euis
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 | Full PDF (232.392 KB) | DOI: 10.33332/jgsm.geologi.20.2.85-92

Abstract

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
GEOLOGI DAN KARAKTERISTIK BIJIH PIT RAMBA JORING DEPOSIT MARTABE, SUMATERA UTARA Arifin, Asri; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Yoseph, Boy
Buletin Sumber Daya Geologi Vol 14, No 2 (2019): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Abstract

Deposit Ramba Joring merupakan bagian dari wilayah Kontrak Karya (KK) pertambangan umum PT Agincourt Resources yang terletak di Kelurahan Aek Pining, Kecamatan Batangtoru, Kabupaten Tapanuli Selatan, Provinsi Sumatera Utara. Penelitian ini bertujuan untuk mengetahui kondisi geologi meliputi geomorfologi, stratigrafi dan struktur geologi serta karakteristik bijih yang mengandung emas-perak pada deposit Ramba Joring. Penelitian dilakukan pada 44 lubang bor dan 15 conto permukaan. Penelitian menggunakan metode analisis petrografi sayatan tipis dan poles, Analytical Spectral Devices (ASD), Scanning Electron Microscopy with Energy Dispersive (SEM EDS) serta pengolahan statistik data geokimia assay berupa nilai kadar kandungan Au, Ag, Cu, SxS (sulfide sulphur) yang didapatkan melalui analisis Atomic Absoption Spectrometry (AAS). Daerah penelitian tersusun oleh litologi, diurutkan dari tua ke muda, berupa satuan andesit hornblende dan breksi polimik-monomik. Satuan batuan andesit hornblende dan breksi polimik-monomik teralterasi kuat oleh empat jenis alterasi yaitu, silisifikasi (kuarsa-kalsedon-alunit-kaolinit±dikit), argilik lanjut (alunit±kuarsa-kaolinit±dikit-pirofilit), argilik (ilit±smektit-alunit-kaolinit-kuarsa) dan propilitik (klorit-epidot-kalsit). Terdapat enam jenis mineral sulfida pada daerah penelitian, paragenesa dimulai dari pirit, enargit, tennantit, tetrahedrit dan kovelit bersamaan dengan pengendapan emas-perak serta pirit dengan kristal berbentuk sempurna yang terbentuk paling akhir. Hasil uji pada data assay geokimia menunjukkan adanya korelasi antara kandungan unsur Au, Ag, Cu dan SxS (sulfide sulphur) terhadap jenis alterasi. Diketahui bahwa mineralisasi emas dan logam lainnya berasosiasiasi dengan mineral sulfida yang melimpah pada alterasi silisifikasi namun semakin berkurang pada jenis alterasi argilik hingga menghilang pada alterasi propilitik.
ALTERASI DAN MINERALISASI CEBAKAN BIG GOSSAN KABUPATEN MIMIKA, PROVINSI PAPUA Fauzan, Akhmad; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Saputra, Dwie H.; Meiriyanto, Fernandy
Buletin Sumber Daya Geologi Vol 14, No 2 (2019): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3108.118 KB)

Abstract

Aktifitas magmatik dan tektonik yang diikuti oleh proses hidrotermal di Pulau Papua dimulai pada zaman Tersier yang menghasilkan batuan intrusi dan mineralisasi Cu-Au di wilayah Ertsberg ? Grasberg dan berpengaruh terhadap proses pembentukan Cebakan Big Gossan. Dalam penelitian ini, dilakukan pemetaan alterasi, analisis petrografi dan mineragrafi untuk mengetahui karakteristik dan penyebaran alterasi  dan mineralisasi di Cebakan Big Gossan pada kedalaman 2.600 mdpl dan 2.640 mdpl. Berdasarkan himpunan mineral ubahannya dibedakan menjadi delapan zona, yaitu: Zona Diopsid ? K-feldspar, Zona Kuarsa ? Diopsid ? Garnet, Zona Garnet ? Diopsid + Epidot, Zona Biotit ? K-feldspar + Epidot, Zona Garnet ? Diopsid, Zona Aktinolit ? Tremolit, Zona Kuarsa ? Dolomit dan Zona Epidot ? Klorit. Berdasarkan asosiasi mineral logamnya, dapat dikelompokan menjadi lima zona, yaitu: Zona Pirit, Zona Kalkopirit ? Pirit ? Magnetit ? Sfalerit, Zona Kalkopirit ? Pirit ? Magnetit ? Hematit ? Sfalerit ? Galena, Zona Kalkopirit ? Pirit ? Magnetit ? Hematit serta Zona Magnetit ? Hematit. Penyebaran zona alterasi dan mineralisasi di daerah penelitian menunjukan arah baratlaut ? tenggara yang dikontrol oleh Sesar Big Gossan yang memiliki kesamaan arah.
GEOLOGI DAN KARAKTERISTIK BIJIH PIT RAMBA JORING DEPOSIT MARTABE, SUMATERA UTARA Arifin, Asri; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Yoseph, Boy
Buletin Sumber Daya Geologi Vol. 14 No. 2 (2019): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1743.098 KB) | DOI: 10.47599/bsdg.v14i2.247

Abstract

Deposit Ramba Joring merupakan bagian dari wilayah Kontrak Karya (KK) pertambangan umum PT Agincourt Resources yang terletak di Kelurahan Aek Pining, Kecamatan Batangtoru, Kabupaten Tapanuli Selatan, Provinsi Sumatera Utara. Penelitian ini bertujuan untuk mengetahui kondisi geologi meliputi geomorfologi, stratigrafi dan struktur geologi serta karakteristik bijih yang mengandung emas-perak pada deposit Ramba Joring. Penelitian dilakukan pada 44 lubang bor dan 15 conto permukaan. Penelitian menggunakan metode analisis petrografi sayatan tipis dan poles, Analytical Spectral Devices (ASD), Scanning Electron Microscopy with Energy Dispersive (SEM EDS) serta pengolahan statistik data geokimia assay berupa nilai kadar kandungan Au, Ag, Cu, SxS (sulfide sulphur) yang didapatkan melalui analisis Atomic Absoption Spectrometry (AAS). Daerah penelitian tersusun oleh litologi, diurutkan dari tua ke muda, berupa satuan andesit hornblende dan breksi polimik-monomik. Satuan batuan andesit hornblende dan breksi polimik-monomik teralterasi kuat oleh empat jenis alterasi yaitu, silisifikasi (kuarsa-kalsedon-alunit-kaolinit±dikit), argilik lanjut (alunit±kuarsa-kaolinit±dikit-pirofilit), argilik (ilit±smektit-alunit-kaolinit-kuarsa) dan propilitik (klorit-epidot-kalsit). Terdapat enam jenis mineral sulfida pada daerah penelitian, paragenesa dimulai dari pirit, enargit, tennantit, tetrahedrit dan kovelit bersamaan dengan pengendapan emas-perak serta pirit dengan kristal berbentuk sempurna yang terbentuk paling akhir. Hasil uji pada data assay geokimia menunjukkan adanya korelasi antara kandungan unsur Au, Ag, Cu dan SxS (sulfide sulphur) terhadap jenis alterasi. Diketahui bahwa mineralisasi emas dan logam lainnya berasosiasiasi dengan mineral sulfida yang melimpah pada alterasi silisifikasi namun semakin berkurang pada jenis alterasi argilik hingga menghilang pada alterasi propilitik.
ALTERASI DAN MINERALISASI CEBAKAN BIG GOSSAN KABUPATEN MIMIKA, PROVINSI PAPUA Fauzan, Akhmad; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Saputra, Dwie H.; Meiriyanto, Fernandy
Buletin Sumber Daya Geologi Vol. 14 No. 2 (2019): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3108.118 KB) | DOI: 10.47599/bsdg.v14i2.278

Abstract

Aktifitas magmatik dan tektonik yang diikuti oleh proses hidrotermal di Pulau Papua dimulai pada zaman Tersier yang menghasilkan batuan intrusi dan mineralisasi Cu-Au di wilayah Ertsberg – Grasberg dan berpengaruh terhadap proses pembentukan Cebakan Big Gossan. Dalam penelitian ini, dilakukan pemetaan alterasi, analisis petrografi dan mineragrafi untuk mengetahui karakteristik dan penyebaran alterasi  dan mineralisasi di Cebakan Big Gossan pada kedalaman 2.600 mdpl dan 2.640 mdpl. Berdasarkan himpunan mineral ubahannya dibedakan menjadi delapan zona, yaitu: Zona Diopsid – K-feldspar, Zona Kuarsa – Diopsid – Garnet, Zona Garnet – Diopsid + Epidot, Zona Biotit – K-feldspar + Epidot, Zona Garnet – Diopsid, Zona Aktinolit – Tremolit, Zona Kuarsa – Dolomit dan Zona Epidot – Klorit. Berdasarkan asosiasi mineral logamnya, dapat dikelompokan menjadi lima zona, yaitu: Zona Pirit, Zona Kalkopirit – Pirit – Magnetit – Sfalerit, Zona Kalkopirit – Pirit – Magnetit – Hematit – Sfalerit – Galena, Zona Kalkopirit – Pirit – Magnetit – Hematit serta Zona Magnetit – Hematit. Penyebaran zona alterasi dan mineralisasi di daerah penelitian menunjukan arah baratlaut – tenggara yang dikontrol oleh Sesar Big Gossan yang memiliki kesamaan arah.
Epithermal Gold-Silver Deposits in Western Java, Indonesia: Gold-Silver Selenide-Telluride Mineralization Yuningsih, Euis Tintin; Matsueda, Hiroharu; Rosana, Mega Fatimah
Indonesian Journal on Geoscience Vol 1, No 2 (2014)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (601.476 KB) | DOI: 10.17014/ijog.1.2.71-81

Abstract

DOI: 10.17014/ijog.v1i2.180The gold-silver ores of western Java reflect a major metallogenic event during the Miocene-Pliocene and Pliocene ages. Mineralogically, the deposits can be divided into two types i.e. Se- and Te-type deposits with some different characteristic features. The objective of the present research is to summarize the mineralogical and geochemical characteristics of Se- and Te-type epithermal mineralization in western Java. Ore and alteration mineral assemblage, fluid inclusions, and radiogenic isotope studies were undertaken in some deposits in western Java combined with literature studies from previous authors. Ore mineralogy of some deposits from western Java such as Pongkor, Cibaliung, Cikidang, Cisungsang, Cirotan, Arinem, and Cineam shows slightly different characteristics as those are divided into Se- and Te-types deposits. The ore mineralogy of the westernmost of west Java region such as Pongkor, Cibaliung, Cikidang, Cisungsang, and Cirotan is characterized by the dominance of silver-arsenic-antimony sulfosalt with silver selenides and rarely tellurides over the argentite, while to the eastern part of West Java such as Arinem and Cineam deposits are dominated by silver-gold tellurides. The average formation temperatures measured from fluid inclusions of quartz associated with ore are in the range of 170 – 220°C with average salinity of less than 1 wt% NaClequiv for Se-type and 190 – 270°C with average salinity of ~2 wt% NaClequiv for Te-type.
Diagnostic Genesis Features of Au-Ag Selenide-Telluride Mineralization of Western Java Deposits Yuningsih, Euis Tintin; Matsueda, Hiroharu; Rosana, Mega F.
Indonesian Journal on Geoscience Vol 3, No 1 (2016)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4956.997 KB) | DOI: 10.17014/ijog.3.1.67-76

Abstract

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 Gentana, Dewi; Sulaksana, Nana; Sukiyah, Emi; Yuningsih, Euis Tintin
Indonesian Journal on Geoscience Vol 6, No 3 (2019)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (29.655 KB) | DOI: 10.17014/ijog.6.3.291-309

Abstract

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.
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