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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

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HOST ROCK AND MINERALIZED ORES GEOCHEMISTRY OF ARINEM VEIN, ARINEM DEPOSIT, WEST JAVA – INDONESIA Yuningsih, Euis Tintin
Bulletin of Scientific Contribution Vol 14, No 2 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Geochemically, the major, minor and trace elements play an important role in the various geological processes. The REE characteristics of quartz vein formed during main mineralization stage are representative of mineralization hydrothermal fluid REE compositions. The research concern the integrating geochemistry and mineralogy analyses. It is an ideal method to study the occurrence of gold deposits in the Arinem area. This area is located on the Java island as a part of West Java province of Indonesia. Detail exploration, including some drilling activities, is ongoing to define the gold and base metal reserve as well as the deposit characteristics. Thirty samples from different stage of mineralized body of Arinem vein, altered host rock from different core level, outcrop host rock, Miocene and Pliocene intrusions were analyses for its geochemical composition by using the Induced Couple Plasma (ICP) and Induced Couple Plasma Mass Spectrometer (ICP-MS). Emission Spectrometry was used to extend the lower detection limits and provide a broader spectrum of elements at the Acme Analytical Labortories, Canada. The REE distribution in the altered host rock of the Arinem deposit indicated that the ΣREE enrichment in the altered host rock, with decreasing in its content from the host rock to the mineralized vein. The observed variations in mineralogy and mineral proportions indicate that Au and Ag came into being only during stage II (except for electrum also indicated at stage I), but that sphalerite, galena, pyrite, chalcopyrite and arsenopyrite were deposited during stages I and II. Keywords : altered host rock, Arinem vein, Geochemistry, Mineralized body, REE. Secara geokimia unsur-unsur utama, sedikit dan jejak (trace) memainkan peran penting dalam beragam proses geologi. Karakteristik unsur tanah jarang (Rare Earth Elements) dalam urat kuarsa yang terbentuk selama tahap mineralisasi utama merupakan representasi dari komposisi REE fluida hidrotermal. Pendekatan yang diterapkan dalam meneliti hal tersebut meliputi integrasi analisis geokimia dan mineralogi, yang merupakan suatu metode yang cukup ideal untuk mempelajari terjadinya deposit emas di Arinem. Daerah Arinem terletak di wilayah Jawa Barat bagian selatan, Indonesia. Eksplorasi detil, termasuk aktifitas pengeboran, sedang berlangsung untuk menentukan cadangan emas dan logam dasar serta karakteristik deposit. Dalam penelitian ini, tiga puluh sampel telah diambil dari tubuh vein Arinem dengan beragam tahapan mineralisasi dan dari batuan induk terubah dengan tingkatan yang berbeda dari inti ke arah luar, serta dari singkapan batuan induk, dan intrusi berumur Miosen dan Pliosen. Analisis untuk mengetahui komposisi kimia menggunakan Induced Couple Plasma (ICP) dan Induced Couple Plasma Mass Spectrometer (ICP-MS). Emission spectrometry digunakan untuk meningkatkan batas bawah deteksi dan memberikan spektrum unsur yang lebih luas. Seluruh analisis tersebut dilakukan di laboratorium “the Acme Analytical Labortories”, Canada. Distribusi REE pada batuan induk terubah dari deposit Arinem mengindikasikan bahwa terjadi pengayaan jumlah REE dalam batuan tersebut, sebaliknya terjadi penurunan kandungannya pada batuan induk yang mengalami mineralisasi vein. Hasil pengamatan menunjukkan bahwa proporsi mineral dan variasi mineraloginya mengindikasikan bahwa kehadiran Au dan Ag hanya terjadi pada tahap II (kecuali untuk elektrum juga diindikasikan pada tahap I). Sebaliknya sfalerit, galena, pirit, kalkopirit dan arsenopirit terbentuk selama tahap I dan II. Kata kunci: batuan induk terubah, vein Arinem, geokimia, tubuh termineralisasi, REE.

KARAKTERISTIK BATUAN INDUK DAN MINERALISASI SKARN DAERAH DMLZ BARAT, DISTRIK ERTSBERG, KABUPATEN MIMIKA, PROVINSI PAPUA Al Adawiah, Nabila.; Yuningsih, Euis. Tintin; F, Kurnia. Arfiansyah; Bensaman, Benny.
Bulletin of Scientific Contribution Vol 19, No 2 (2021): Bulletins of Scientific Contribution : Geology
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v19i2.34155

ABSTRACTThe deposit type in Ertsberg District, consist of porphyry and skarn type. Ertsberg skarn associated with Ertsberg diorite intrusion developed in DOM and East Ertsberg Skarn System (EESS). Deep Mill Level Zone (DMLZ) is the lowest mining zone and the part of EESS. Megascopis and microscopic analysis, such as petrography analysis method on core sampel from DMLZ were carried out to determine the characteristics of host rock and mineralization occurred in study area. Based on mineral association and alteration mineral, metallic minerals formed on limestone, calcareous shales, and igneous rock as its host rock. Those host rock was altered on weak to strong intensity. According to characteristic of litology, lithological unit were divided into units, namely : Hornfels Unit, Marble Unit, Altered Limestone Unit, and Intrusion Igneous Rock Unit. Mineralization can be identified as pyrite, chalcopyrite, sphalerite, bornite, magnetite, hematite, and malachite. It formed as disseminated, scattered, patches, and as a veinlet. Ertsberg intrusion intrude carbonates and siliciclastic sediment wall rock in study area and metamorphism occurred. Metamorphic rock appeared in recent sample from study area. Magmatic fluid from magma differentiation interacted with wall rock caused metasomatism and hydrothermal alteration process. Furthermore, metallic minerals that carried away by magmatic fluid precipitated as temperature dropped.Keywords : Deep Mill Level Zone (DMLZ), host rock, mineralization, skarn ABSTRAKTipe endapan yang terdapat di Distrik Ertsberg, meliputi tipe porfiri dan skarn. Skarn Ertsberg berasosiasi dengan intrusi diorit Ertsberg pada endapan skarn DOM dan East Ertsberg Skarn System (EESS). Deep Mill Level Zone (DMLZ) merupakan tambang terbawah dan bagian dari EESS. Metode analisis megaskopis dan mikroskopis, berupa analisis petrografi pada sampel inti dari DMLZ digunakan untuk tujuan mengetahui karakteristik batuan induk dan mineralisasi. Ditinjau dari dari mineral penyusun dan mineral ubahannya, mineral bijih terbentuk pada batuan induk, berupa batugamping, batuserpih karbonatan, dan batuan beku. Batuan induk tersebut secara umum sudah mengalami ubahan dengan intensitas lemah hingga kuat jika dilihat dari banyaknya kehadiran mineral ubahan. Berdasarkan karakteristik litologinya, batuan dibagi menjadi satuan litologi, yaitu Satuan Hornfels, Satuan Marmer, Satuan Batugamping Terubah, dan Satuan Batuan Beku Intrusi. Mineralisasi yang hadir meliputi pirit, kalkopirit, sfalerit, bornit, magnetit, hematit, dan malakit. Kehadirannya dapat tersebar merata, tersebar tidak merata, patches, maupun sebagai urat. Intrusi Ertsberg menerobos batuan samping berupa batuan karbonat dan batuan sedimen silisiklastik di daerah penelitian, sehingga batuan samping mengalami metamorfisme. Batuan metamorf tampak pada sampel batuan saat ini. Fluida magmatik hasil diferensiasi magma yang kemudian berinteraksi dengan batuan samping menyebabkan metasomatisme dan proses alterasi hidrotermal terjadi. Selanjutnya, mineral bijih yang terbawa oleh fluida magmatik terpresipitasi seiring menurunnya suhu.Kata Kunci : Deep Mill Level Zone (DMLZ), batuan induk, mineralisasi, skarn

HOST ROCK AND MINERALIZED ORES GEOCHEMISTRY OF BANTARHUNI VEIN, ARINEM DEPOSIT, WEST JAVA – INDONESIA Yuningsih, Euis Tintin
Bulletin of Scientific Contribution: GEOLOGY Vol 14, No 3 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

There are closed spatial relationship between the different phases, the different metallic minerals, the precious-metals bearing minerals, the volcanic host rock and the plutonic intrusions of the Arinem vein system. Nine samples from Bantarhuni vein including four samples from quartz-sulfide vein from different stages and level, and five samples from altered host rock were analyzed geochemically by Induced Couple Plasma (ICP) and Induced Couple Plasma Mass Spectrometer (ICP-MS) to identified the geochemical characteristics of Bantarhuni vein system. The geochemical data obtained from the quartz-sulfide vein and altered host rock of the Bantarhuni vein is mostly similar to those obtained from Arinem vein samples. Some samples from the alteration zone have contents similar to the less altered Jampang Formation and andesitic Miocene and Pliocene intrusions rocks, with a little depletion and enrichment for some oxides. The abundance of ore and gangue minerals vary among each stage of mineralization of Bantarhuni vein. The REE in the Arinem and Bantarhuni veins considered to have been extracted by water/rock interaction between hydrothermal solution and country rocks. Some REE pattern of the mineralized Bantarhuni vein show irregularly pattern and this is could be due to high content of sulfide minerals in the samples, or due to analytical error during sample dissolution. The gold and silver contents in the Arinem and Bantarhuni veins vary very much and there is relatively low Au and Ag concentrations occur in samples from any alteration zone. There is no correlation found between gold and other major ore elements except for Ag. The highest content of Au is having low ΣREE. Keywords : Bantarhuni vein, Geochemical, quartz-sulfide vein, water-rock interaction. Terdapat hubungan spasial antara fase yang berbeda, mineral logam yang berbeda, mineral yang mengandung logam mulia, batuan induk (host rock) vulkanik dan intrusi plutonik dalam sistem urat Arinem. Sembilan sampel dari urat Bantarhuni yang terdiri dari empat sampel dari urat kuarsa-sulfida dari stages dan kedalaman yang berbeda, dan lima sampel dari host rock yang terubah dianalisis secara geokimia degan Induced Couple Plasma (ICP) dan Induced Couple Plasma Mass Spectrometer (ICP-MS) untuk mengidentifikasi karakteristik geokimia dari sistem urat Bantarhuni. Data analisis geokimia yang diperoleh dari urat kuarsa-sulfida dan batuan induk terubah dari urat Bantarhuni sebagian besar sama dengan yang diperoleh dari sampel urat Arinem. Beberapa sampel dari zona alterasi memiliki kandungan mirip dengan Formasi Jampang yang terubah lemah dan batuan intrusi andesit berumur Miosen dan Pliosen, dicirikan dengan sedikit pengurangan dan pengayaan untuk beberapa oksida. Kelimpahan bijih dan mineral gang bervariasi di dalam setiap tahap mineralisasi di urat Bantarhuni. REE di urat Arinem dan Bantarhuni kemungkinan diekstraksi dengan adanya interaksi air/batuan antara fluida hidrothermal dan batuan sampingnya. Beberapa pola REE dari urat Bantarhuni yang termineralisasi menunjukkan pola yang tidak teratur dan hal ini kemungkinan disebabkan oleh tingginya kandungan mineral sulfida dalam sampel, atau karena kesalahan pada saat analisis dalam pelarutan sampel. Kandungan emas dan perak dalam urat Arinem dan Bantarhuni sangat bervariasi dan konsentrasi Au dan Ag pada sampel dari setiap zona alterasi relatif rendah. Tidak ada korelasi ditemukan antara emas dan unsur bijih utama lainnya kecuali dengan Ag. Sampel dengan kandungan Au tertinggi adalah sampel yang memiliki ΣREE rendah. Kata kunci: Urat Bantarhuni, geokimia, urat kuarsa-sulfida, interaksi air-batuan.

STUDI PROVENANCE BATUPASIR FORMASI - FORMASI DI CEKUNGAN OMBILIN, SUMATRA BARAT -, Euis Tintin Yuningsih
Bulletin of Scientific Contribution: GEOLOGY Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc geology.v5i1.8132

Based on rock composition percentage of feldspar, quartz and rock fragment on Q-F-L triangle diagram, the sandstone provenance of Brani Formation is continental block, otherwise Sawahlunto and Sawahtambang Formations is recycled orogen. Qm-F-L triangle diagram shows the provenance of Brani, Sawahlunto and Sawahtambang Formations is continental block, Sangkarewang and Ombilin Formations is transitional magmatic arc placed in the Cretaceous orogen belt as a result of convergency of Mergui-Woyla microplates. Based on rock composition percentage on the Qp-Lv-Ls triangle diagram, the source for Brani and Sawahtambang Formations is mixed orogenic sand, Sawahlunto Formation is collision orogen and mixed orogenic sand, otherwise the source for Sangkarewang and Ombilin Formations is arc orogen where the zone of collision is the suturing of Mergui-Woyla microplates, Qm-P-K triangle diagram shows that Brani, Sawahlunto and Sawahtambang Formations have high maturity or stability from continental block indicated the source of stable micro continen (continental block provenances) as a part of Mergui-Woyla terrane, Sangkarewang Formation has low maturity or stability

SISTEM PANASBUMI BERDASARKAN ANALISIS GEOKIMIA AIR PANAS DAERAH AMOHOLA DAN SUMBERSARI, KECAMATAN MORAMO, KABUPATEN KONAWE SELATAN, PROVINSI SULAWESI TENGGARA Aprilia, Fitriani Dewi; Yuningsih, Euis Tintin; Patonah, Aton; Rezky, Yuano; Yushantarti, Anna; Nurdin, Asep
Bulletin of Scientific Contribution: GEOLOGY Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The research area is located in Amohola and Sumbersari, Moramo sub-district, Konawe South regency, Southeast Sulawesi Province. Geographically located between 122°35’6,07" – 122°45'58,94" BT dan 4°5'20,28" – 4°16'10,85" LS. The research areas have a stratigraphy consisted of Meta-limestones, Phylite, Schist, Quartzite, Conglomerates, Limestones, Carbonate Sandstone, Claystone, and sediment surface. Hot waters have temperatures ranging from 37,5oC to 50oC. The fluid geochemical data affirm that the Amohola area has Chloride type of water, which indicates it is close to the heat source, whereas in Sumbersari area has Bicarbonate water type, which indicates that the fluid has affected by meteoric water. Geothermal system in these two areas assumed that has separated by tectonic activity and the emersion of the lithology affected the chemical content of the hot fluid. The Geotermometer indicates that the subsurface of Amohola manifestations temperatures are around 146°C (medium enthalpy), whereas in Sumbersari 43°C (low enthalpy).

ANALISIS KIMIA BATUAN BASEMEN GRANITOID DI SUB CEKUNGAN JAMBI, SUMATRA SELATAN BERDASARKAN DATA DARI SUMUR JSB-3, JSB-4 DAN JSB-6 -, Euis Tintin Yuningsih
Bulletin of Scientific Contribution: GEOLOGY Vol 4, No 2 (2006): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc geology.v4i2.8120

Research area located at Jambi sub basin, the northern part of South Sumatra Basin formed during Tertiary. The propose of the research is to determine petrological characteristics of pre-Tertiary basement rock based on major oxides analysis from the granitoid basement rock in research area with AAS method (Atomic Absorption Spectrophotometry) so the petrogenesis could be determined including kinds and characteristics of parent magma. Chemical rock analysis confirm the lithology of granitoid basement in Jambi sub basin are intermediate – acid magmas, calc-alkaline, medium – high K, metalluminous, subduction-related (orogen) at active continental margin. Granitoid at JSB-4 and JSB-6 shows magnetite series and I type. This Mesozoic granitoid probably as extension from the Thailand and Burma granite province, that underline the fact that there has been a history of subduction-related magmatism along Southwestern edge of Sundaland since earliest Mesozoic times.

MINERAGRAFI BATUAN PENYUSUN TAMBANG DEEP MILL LEVEL ZONE (DMLZ) PT. FREEPORT INDONESIA Ruswanto, .; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Purwaiswanto, Bambang Antoro
Bulletin of Scientific Contribution Vol 15, No 2 (2017): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRAKDeep Mill Level Zone (DMLZ) merupakan bagian dari cebakan East Erstberg Skarn System (EESS) dan merupakan tambang bawah tanah level ke-empat setelah Tambang Gunung Bijih Timur (GBT), Intermediate Ore Zone (IOZ) dan Deep Ore Zone (DOZ), yang memiliki cadangan sebesar 472 juta ton, dengan kadar tembaga 0,85% dan emas 0,72 g/t. Mineral bijih yang ditemukan berdasarkan analisa mineragrafi di DMLZ adalah kalkopirit, bornit, kovelit, hematit, sfalerit, galena dan pirit. mineral kalkopirit saling terikat dengan mineral pirit, galena dan sfalerit di batuan intrusi, kalkopirit berikatan dengan sfalerit di batugamping Ekmai, kalkopirit terlihat sebagai butiran bebas dan juga berikatan dengan pirit di batuserpih Ekmai, serta kalkopirit-sfalerit-bornit saling berikatan dan kalkopirit terlihat sebagai inklusi di dalam sfalerit dan juga kovelit hadir menggantikan bornit di beberapa bagian Kata kunci: Deep Mill Level Zone (DMLZ), East Ertberg Skarn System (EESS), mineragrafi, mineral bijih. ABSTRACTDeep Mill Level Zone (DMLZ) is one of underground mining in PT. Freeport Indonesia and part of East Erstberg Skarn System (EESS) Complex, located at 4th level below Gunung Bijih Timur (GBT), Intermediate Ore Zone (IOZ) dan Deep Ore Zone (DOZ) with reserve 472 milion ton with garde of Cu 0.85% and Au 0.72 g/t. Ore minerals in DMLZ based on minergraphy are chalcopyrite, bornite, covelite, hematit, sphalerite, galena and pyrite. Chalcopyrite minerals binds with pyrite-galena-sphalerite in intrusive rocks, chalcopyrite binds to sphalerite in the Ekmai limestone, chalcopyrite is seen as free-grained and binds to pyrite in the Ekmai shalestone, as well as chalcopyrite-sphalerite binding and viscous chalcopyrite as inclusions in the sphalerite and present covelite to replace the bornite in some parts Key words: Deep Mill Level Zone (DMLZ), East Ertberg Skarn System (EESS), mineragraphy, Ore minerals.

MINERALOGI GRANITOID BUKIT PAGIAS CEKUNGAN OMBILIN, SUMATERA BARAT -, Euis Tintin Yuningsih
Bulletin of Scientific Contribution Vol 4, No 1 (2006): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Igneous rocks forming will shows different chemical composition and mineralogy from one phase to another sharply or gradually. This research will study about characteristic of basement rock from Bukit Pagias granitoid complex for detail views. Bukit Pagias granitoid complex have different characteristic although its close each other. Its proved by petrographic analysis that shows different composition of mineralogy. From the color, its shows two kinds of granite i.e. gray granite/monzo-granite (Streckeisen, 1978) and red granite/granite (Streckeisen, 1978), in some part of the area, there are altered red granite and granite wash/weathering granite. The rocks in this area was fractured and filled with silica in part.

KONTROL MINERALOGI TERHADAP “PROBLEMATIC ORE” CADANGAN GRASBERG BLOCK CAVE (GBC) TAMBANG BAWAH TANAH FREEPORT INDONESIA DI PAPUA F. G, Aiwoy; Syafri, Ildrem; Yuningsih, Euis Tintin
Bulletin of Scientific Contribution Vol 16, No 1 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1044.398 KB)

Grasberg Block Cave adalah tambang bawah tanah yang merupakan kelanjutan dari Cadangan Grasberg yaitu sebuah tambang terbuka yang berada di atasnya. Tambang ini juga termasuk dalam Kontrak Karya A (COW “A”) PT. Freeport Indonesia, Distrik Ertsberg, Papua. Besarnya cadangan Grasberg Block Cave tersebut pada akhir Januari 2015 adalah 1.011 milyar ton dengan kandungan tembaga (Cu) 1.% dan emas (Au) 0.77 g/t. Grasberg Block Cave adalah tipe cadangan porphyry yang memiliki kadar Cu-Au tinggi dalam material stockwork dengan bentuk sepatu kuda yang dikelilingi oleh Kali Diorite. Performa uji metalurgi merupakan refleksi dari type bijih “ore” yang dibutuhkan oleh insinyur tambang untuk mendapatkan hasil yang optimal untuk metal target. Tipe bijih yang bersih akan diproduksi lebih untuk mendapatkan perolehan metal yang tinggi jika dibandingkan dengan bijih bermasalah (problematic ore). Identifikasi bijih bermasalah “problematic ore” di tambang bawah tanah Grasberg Block Cave, yang dibahas dalam makalah, diharapkan bisa berguna dalam proses penambangan. Kajian tentang bijih “bermasalah” (problematic ore) pada cadangan Grasberg Block Cave ini dilakukan untuk mengetahui karakteristik dan kontrol-kontrol mineralogi pada tipe ore ini guna mengurangi kerugian akibat berkurangnya perolehan mineral-mineral bijih berharga. Metode yang digunakan adalah pemetaan geologi dan sampling di lapangan, analisis XRD untuk sampel terpilih dari batuan inti hasil pemboran, serta analisis geo-metalurgi yang dilakukan di laboratorium. Jenis bijih yang bermasalah berdasarkan standar geo-metalurgi Freeport Indonesia, seperti halnya di tambang terbuka Grasberg, diprediksi juga terdapat di Grasberg Block Cave. Bijih ini dipengaruhi oleh mineral pengotor seperti mineral serisit-lempung>10%, pirit> 5%, dan mika> 15%. Oleh karena itu, pengamatan geologi di lapangan dikombinasikan dengan analisis laboratorium sangat penting untuk mengetahui bijih bermasalah pada cadangan tambang bawah tanah Grasberg Block Cave.

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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