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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

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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.

PENDEKATAN STATISTIK MULTIVARIAT TERHADAP DATA GEOKIMIA TANAH MULTI-UNSUR UNTUK MENGIDENTIFIKASI MINERALISASI Au-Cu EPITERMAL SULFIDA TINGGI DI DAERAH PROSPEK "X", KECAMATAN BATANG ASAI, KABUPATEN SAROLANGUN, PROVINSI JAMBI Fiandri Indra Rinawan; Prof. Ir. Mega Fatimah Rosana, M.Sc., Ph.D; Bronto Sutopo, S.T., Dipl. Geoth. En., P; Euis Tintin Yuningsih, ST., MT., Ph.D
Buletin Sumber Daya Geologi Vol. 11 No. 1 (2016): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Analisis statistik multivariat dilakukan terhadap data analisis kimia multi-unsur conto tanah menutupi endapan mineral yang menempati litologi batuan vulkanik Formasi Hulu Simpang berumur Oligosen Akhir - Awal Miosen, terletak di daerah Prospek "X", Kabupaten Sarolangun, Jambi. Tujuan penelitian ini adalah untuk mengetahui hubungan antara Au dan Cu dengan unsur-unsur lain agar dapat teridentifikasi kemungkinan mineralisasi Au-Cu endapan sulfida tinggi dari data geokimia tanah. Penelitian ini difokuskan pada 12 unsur terdiri Au, Ag, Hg, Te, Sb, As, Bi, Cu, Pb, Zn, Sn, dan Mo. Hasil analisis kimia 376 conto tanah kisi dari daerah penelitian dengan luas berkisar 5,3 km2 disajikan dengan menggunakan statistik multivariat yang terdiri analisis korelasi dan analisis klaster hirarki. Kedua metode statistik multivariat tersebut mengindikasikan kompilasi hasil analisis yang bersifat representatif yaitu Klaster I Cu-As-Sb-Te dengan nilai korelasi berkisar 0.50-0.93 dan Klaster II Au-Bi dengan nilai korelasi 0.26; adapun yang bersifat tidak representatif yaitu Klaster III Pb-Mo-Zn dengan nilai korelasi berkisar 0.09-0.10 dan Klaster IV Sn-Hg-Ag dengan nilai korelasi berkisar 0.02-0.25. Klaster I dan II berkaitan dengan kumpulan asosiasi unsur indikasi mineralisasi Au-Cu epitermal sulfida tinggi. Daerah mineralisasi ini tersusun oleh ubahan argilik lanjut dari breksi vulkanik, tuf, andesit, dan dasit; serta dicirikan oleh kehadiran mineral bijih enargit, luzonit, kalkopirit, arsenopirit, dan kovelit.

ORE MINERALS FROM KUROKO TYPE DEPOSIT OF TOYA-TAKARADA MINE, HOKKAIDO, JAPAN Euis Tintin Yuningsih, ST., MT., Ph.D
Buletin Sumber Daya Geologi Vol. 11 No. 2 (2016): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Toya-Takarada mine is Au- and Ag-rich Kuroko-type deposit located in Takarada, Toya-mura, southwest Hokkaido, Japan. The deposits were hosted in rhyolitic tuff and mudstone of Middle Miocene age. Ore samples of fine-grained black ore, vuggy black-yellow ore, granular vuggy black ore, quartz-sulfide ore and massive quartz-barite ore were studied to identify the ore minerals association in the Toya-Takarada mine. The ore minerals are dominated by sphalerite, galena, chalcopyrite and pyrite with fewer amounts of electrum, tetrahedrite-tennantite, and other sulfosalt minerals with secondary mineral of covellite.The quantitative chemical analysis of ore minerals by EPMA indicated that FeS contents in sphalerite is low (0.3-1.2 mol.%) in all kinds of ore samples. Small grains of electrum as inclusions in pyrite are identified in vuggy black-yellow ore with Ag content around 32-33 atm %.In general, the silver minerals in Kuroko-type deposits occurred mainly in the black and yellow ores zone dominantly composed of sphalerite, galena, pyrite, chalcopyrite and barite as a form of electrum and/or argentian tetrahedrite-tennantite series. Thus, the massive quartz-barite ore sample of Toya-Takarada mine are also contain some rare silver sulfosalt minerals such as proustite, Cu-rich pearceite, geocronite-jordanite and fizelyite. Those minerals were found together in association with sphalerite. It seems that sphalerite was crystallized first followed by proustite and Cu-rich pearceite, then geocronite-jordanite and fizelyite are crystallized later.Sphalerites from quartz-sulfide ore of Toya-Takarada contain some fluid inclusions and measured homogenization temperatures are in the range of 164-247°C (av. 208°C) with salinity ranging from 1.9 to 4.7 wt.% NaClequiv. (av. 3.9 wt.% NaClequiv.). The mineral assemblage, iron content in sphalerite and silver content in electrum were indicated that sulfur fugacity was slightly higher during ore mineralization in Toya-Takarada mine.

ANALISIS FAKTOR DAN UNIVARIAT DALAM PENENTUAN POTENSI MINERALISASI CU, PB, ZN DI HALMAHERA BAGIAN BARAT, MALUKU UTARA Reza Mochammad Faizal; Soepriadi Soepriadi; Mega Fatimah Rosana; euis Tintin Yuningsih
Buletin Sumber Daya Geologi Vol. 10 No. 3 (2015): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Penelitian geokimia dengan menggunakan metode analisis kandungan unsur dari perconto endapan sungai aktif -80 mesh merupakan salah satu fase awal eksplorasi terutama untuk menemukan cebakan mineral logam. Halmahera bagian barat dengan tataan geologi yang kompleks dan berada dalam jalurmetalogenik yang berpotensi membentuk cebakan logam, menghasilkan rona geokimia yang sangat bervariasi dan menarik. Data geokimia sedimen sungai aktif yang tertuang dalam bentuk peta sebaran unsur menyajikan informasi awal yang penting tentang indikasi mineralisasi untuk ditindaklanjuti ke tahap penelitian lebih rinci. Penafsiran data geokimia di wilayah penelitian telah dilakukan dengan pendekatan analisis multivariat yaitu analisis faktor. Diperoleh asosiasi unsur yang berhubungan dengan unsur target Cu, Pb, Zn dengan Co, Fe, Ag dan Au. Litologi daerah penelitian berupa batuan volkanik berkomposisi andesit dan basalt. Terdapat indikasi mineralisasi berupa sulfida pirit dan batuan t erubah yang berupa silisifikasi, propilitisasi dan argilik. Di Halmahera bagian Barat diperkirakan mineralisasi logam yang terbentuk adalah bijih sulfida hidrotermal.

PROFIL ENDAPAN LATERIT NIKEL DI POMALAA, KABUPATEN KOLAKA, PROVINSI SULAWESI TENGGARA Hashari Kamaruddin; Riko Ardiansyah Indrakususma; Mega Fatimah Rosana; Nana Sulaksana; Euis Tintin Yuningsih
Buletin Sumber Daya Geologi Vol. 13 No. 2 (2018): 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.v13i2.221

Geologi daerah Pomalaa merupakan bagian dari batuan ultramafik Ofiolit Sulawesi Timur di lengan tenggara Sulawesi. Di daerah tersebut endapan laterit nikel Pomalaa terbentuk dari pelapukan batuan asal ultramafik yang didominasi oleh harzburgit terserpentinisasikan dan memiliki karakteristik tipe endapan laterit nikel hydrous Mg silicate. Lateritisasi terbentuk pada morfologi perbukitan bergelombang rendah dengan sudut kelerengan berkisar 10° sampai dengan 25°. Proses lateritisasi berlangsung dengan baik terutama pada topografi yang cenderung lebih landai yaitu 10° sampai dengan 15°, yang memungkinkan terbentuknya lateritisasi yang cukup dalam dengan zona saprolit yang tebal.

KETERKAITAN KELIMPAHAN UNSUR MAJOR DAN MINOR DENGAN ZONASI LATERIT NIKEL BLOK HZ (HARZBURGIT) DAN DN (DUNIT) DAERAH PULAU PAKAL, HALMAHERA TIMUR Fiandri Indragunawan Rinawan; Mega Fatimah Rosana; Mohammad N Heriawan; Euis Tintin Yuningsih
Buletin Sumber Daya Geologi Vol. 13 No. 3 (2018): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Keterkaitan kelimpahan unsur pada profil laterit nikel dilakukan berdasarkan hasil analisis kimia unsur major (Fe, SiO2, MgO, dan Al2O3) dan minor (Ni, Co, MnO, dan Cr2O3) menggunakan analisis univariat dan multivariat. Profil berupa tanah atau hancuran batuan hasil lapukan litologi ultrabasa harzburgit (Blok HZ) dan dunit (Blok DN) berumur Kapur hingga Jura, terletak di daerah Pulau Pakal, Halmahera Timur. Tujuan penelitian ini yaitu untuk mengetahui hubungan antar unsur kimia major dan minor terhadap nilai koefisien korelasi kuat hingga sangat kuat baik negatif maupun positif yang terdistribusi pada profil laterit nikel Blok HZ dan DN. Penelitian ini fokus pada identifikasi fisik mineralogi bedrock dan analisis kimia profil laterit nikel. Identifikasi fisik di Blok HZ melibatkan 436 conto berasal dari 19 pemboran, kedalaman 10 m hingga 40 m. Adapun identifikasi fisik di Blok DN melibatkan 650 conto berasal dari 16 pemboran, kedalaman 11 m hingga 57 m. Komposisi mineral di Blok HZ terdiri dari mineral oksida besi limonit, gutit, jarosit, dan oksida mangan (zona limonit); krisopras, garnierit, magnetit, hematit, serpentin-krisotil, dan stiktit (zona saprolit); olivin-forsterit, piroksen-ortopiroksen, dan kromit (zona boulder/bedrock). Sedangkan di Blok DN terdiri dari mineral oksida besi limonit, gutit, dan oksida mangan (zona limonit); krisopras, jarosit, garnierit, magnetit, hematit, mineral lempung montmorilonit, kuarsa, serpentin-krisotil, dan talk (zona saprolit), olivin-forsterit, piroksen-hastingsit, dan kromit (zona boulder/bedrock). Analisis statistik univariat menunjukkan distribusi data relatif tidak normal dengan koefisien variasi > 0,5. Pada analisis statistik multivariat mengindikasikan nilai koefisien korelasi positif maupun negatif pada zonasi laterit nikel berupa hubungan unsur yang sangat kuat (± 0,80 - 1,00) dengan jumlah korelasi dominan. Koefisien korelasi pada Blok HZ diantaranya mengindikasikan pasangan unsur yang berkorelasi sangat kuat yaitu: unsur major-major (Fe vs MgO, Fe vs SiO2, SiO2 vs MgO, dan MgO vs Al2O3), minor-minor (Co vs MnO) serta major-minor (Al2O3 vs Cr2O3, Fe vs Co, Fe vs MnO, dan SiO2 vs Co). Sedangkan pada Blok DN pasangan unsur yang berkorelasi sangat kuat yaitu: unsur major-major (Fe vs MgO), minor-minor (Co vs MnO) dan major-minor (Fe vs Co, Fe vs Cr2O3, Fe vs MnO, MgO vs Co, dan MgO vs MnO). Hal ini berkaitan dengan posisi masing-masing korelasi distribusi unsur kimia major dan minor tersebut pada zona profil laterit nikel Limonit, Saprolit dan Boulder/Bedrock.

ALTERASI HIDROTERMAL GUNUNG RENDINGAN BERDASARKAN ANALISIS PETROGRAFI DAN X-RAY DIFFRACTION (XRD) Dewi Gentana; Nana Sulaksana; Emi Sukiyah; Euis Tintin Yuningsih
Buletin Sumber Daya Geologi Vol. 13 No. 3 (2018): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Daerah penelitian terletak di daerah panas bumi Gunung Rendingan, Kabupaten Tanggamus, Provinsi Lampung. Daerah penelitian dipengaruhi oleh Sesar Semangko, mempunyai pola sesar berarah Barat Laut -Tenggara dan Timur Laut – Barat Daya. Penelitian bertujuan untuk mengetahui himpunan mineral alterasi berdasarkan analisis petrografi dan X-Ray Diffraction (XRD). Analisis petrografi digunakan untuk mengetahui mineral alterasi sebagai indikator temperatur dan fluida hidrothermal di daerah penelitian. Analisis XRD dilakukan untuk mengindentifikasi jenis mineral lempung. Berdasarkan analisis petrografi dan XRD pada batuan permukaan di daerah penelitian menghadirkan mineral kelompok lempung yang terdiri dari smektit, ilit, serisit dan kaolinit. Hasil analisis petrografi dan XRD terhadap serbuk bor (cutting) dari sumur XD-1, XD-2 dan XD-3 memperlihatkan himpunan mineral alterasi hidrotermal smektit-kaolinit-serisit dan ilit-epidot pada sumur XD-1, himpunan mineral serisit-smektit, smektit-ilit dan ilit-epidot pada sumur XD-2, himpunan mineral smektit-kaolinit dan ilit-smektit-epidot pada sumur XD-3. Berdasarkan himpunan mineral alterasi tersebut dapat diperkirakan temperatur bawah permukaan di daerah penelitian berkisar 150°-300°C pada kedalaman 700 – 1900 mKu sebagai zona reservoir. Kehadiran mineral kalk-silikat yaitu epidot bersama wairaikit dan prehnit sebagai indikator zona reservoir memiliki temperatur yang baik. Batuan di daerah penelitian memiliki permeabilitas yang baik dengan kehadiran mineral adularia.

Karakteristik Jasper Merah di Pulau Jawa Bagian Selatan Berdasarkan Analisis SEM dan XRF Kemala Wijayanti; Mega Fatimah Rosana; Euis Tintin Yuningsih; Raden Isnu Hajar Sulistyawan
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 | DOI: 10.33332/jgsm.geologi.v18i1.82

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 â€“ Garut, Samigaluh â€“ Yogyakarta, and Donorojo â€“ 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 Euis Tintin Yuningsih
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 3 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i3.142

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+calciteÂ±illiteÂ±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

FLUID INCLUSION CHARACTERISTICS OF AURIFEROUS ARINEM AND BANTARHUNI QUARTZ VEINS, ARINEM, WEST JAVA, INDONESIA Euis Tintin Yuningsih
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 6 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i6.183

A microthermometric study of fluid inclusions were carried out on the samples from the epithermal gold-silver-base metal mineralization of Arinem and Bantarhuni veins of Arinem deposit from different levels, stages and minerals types (quartz, sphalerite and calcite) to understand the characteristics of the fluid inclusions trapped, and to determine the physical and chemical environments of ore mineral deposition. The results of primary fluid inclusions measurement of stages I and II of main ore mineralization revealed that Arinem and Bantarhuni quartz veins are in the average range of 194.0Âºâ€“267.3ÂºC, and sphalerite samples are 194.1Âºâ€“241.2ÂºC. The measurement indicates a general decrease of temperature with decreasing depth and an increasing paragenetic time. The evidence of boiling was measured from substage IA of the Arinem vein with the filling temperatures of these inclusions range from 216.8Âºâ€“247.3ÂºC. Under such condition, with an average fluid density of 0.861 g/cm3 and a pressure of about 21.7 bars, the paleo-depth would have about 235 meters. Fluid inclusions assemblages from main stages I and II from all levels commonly show a narrow range in Tm values (0.18â€“4.43 wt.% NaClequiv.). This is also marked in fluid inclusions assemblages from late stage (stage III) of barren quartz (0.35â€“3.87 wt.% NaClequiv.). Raman spectroscopic analyses of CO2, N2, H2S and CH4 on selected fluid inclusions of the Arinem vein samples, shows no volatile components other than H2O.Keywords: Arinem, Bantarhuni, fluid inclusion, microthermometry, quartz, salinity.

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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