Article Per Year (5 Year)
p-Index From 2019 - 2024
5.031
P-Index
This Author published in this journals
All Journal PROSIDING SEMINAR NASIONAL TEKNIK Transmisi: Jurnal Ilmiah Teknik Elektro Jurnal Pendidikan Geografi Undiksha The Indonesian Journal of Business Administration TRANSIENT Jurnal Sains dan Teknologi Mediator Jurnal Teknik Elektro Jurnal Kependudukan Padjadjaran IJOG : Indonesian Journal on Geoscience MUQTASID Jurnal Infra KUKILA PUBLIC HEALTH JOURNAL Jurnal Administrasi Kesehatan Indonesia International Journal of Advances in Intelligent Informatics Biomedika Pharmacon GEA, Jurnal Pendidikan Geografi Proceeding SENDI_U Register: Jurnal Ilmiah Teknologi Sistem Informasi ProTVF: Jurnal Kajian Televisi dan FIlm Jurnal Pendidikan Ilmu Sosial Jurnal Fisika FLUX Agricore: Jurnal Agribisnis dan Sosial Ekonomi Pertanian Unpad Mimbar Agribisnis: Jurnal Pemikiran Masyarakat Ilmiah Berwawasan Agribisnis Script Journal: Journal of Linguistic and English Teaching JURNAL PENDIDIKAN JASMANI DAN OLAHRAGA Al-Daulah : Jurnal Hukum dan Perundangan Islam Jurnal Ilmiah Manuntung Journal of Nutraceuticals and Herbal Medicine JPPI | Jurnal Penelitian Pendidikan Islam Jurnal Surya Masyarakat Academic Journal Perspective : Education, Language, and Literature IJMS - Indonesian Journal on Medical Science Metalurgi ACTIVE: Journal of Physical Education, Sport, Health and Recreation JUSIM (Jurnal Sistem Informasi Musirawas) ADLIYA: Jurnal Hukum dan Kemanusiaan JIA (Jurnal Ilmiah Agribisnis) : Jurnal Agribisnis dan Ilmu Sosial Ekonomi Pertanian Social, Humanities, and Educational Studies (SHEs): Conference Series International Journal of Economics, Business and Accounting Research (IJEBAR) Likhitaprajna: Jurnal Ilmiah Fakultas Keguruan Ilmu Pendidikan Universitas Wisnuwardhana Malang Jurnal Riset Kefarmasian Indonesia Media Farmasi Indonesia Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Teknomatika (Jurnal Teknologi dan Informatika) Mattawang: Jurnal Pengabdian Masyarakat Jurnal Ilmiah Pharmacy Bestari: Jurnal Studi Pendidikan Islam Jurnal Abmas Makara Journal of Science Jurnal Hukum dan Pembangunan
Iwan Setiawan
Pusat Teknologi Bahan Bakar Nuklir (PTBBN), BATAN Kawasan Puspiptek-Tangerang Selatan 15314, Banten
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

Published : 120 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search
Journal : IJOG : Indonesian Journal on Geoscience

 1 
Some Key Features and Possible Origin of the Metamorphic Rock-Hosted Gold Mineralization in Buru Island, Indonesia Idrus, Arifudin; Prihatmoko, Sukmandaru; Hartono, Hill. Gendoet; Idrus, Fadlin; Ernowo, Ernowo; Franklin, Franklin; Moetamar, Moetamar; Setiawan, Iwan
Indonesian Journal on Geoscience Vol 1, No 1 (2014)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (998.411 KB) | DOI: 10.17014/ijog.v1i1.172

Abstract

DOI: 10.17014/ijog.v1i1.172This paper discusses characteristics of some key features of the primary Buru gold deposit as a tool for a better understanding of the deposit genesis. Currently, about 105,000 artisanal and small-scale gold miners (ASGM) are operating in two main localities, i.e. Gogorea and Gunung Botak by digging pits/shafts following gold-bearing quartz vein orientation. The gold extraction uses mercury (amalgamation) and cyanide processing. The field study identifies two types/generations of quartz veins namely (1) Early quartz veins which are segmented, sigmoidal, dis­continous, and parallel to the foliation of host rock. The quartz vein is lack of sulfides, weak mineralized, crystalline, relatively clear, and maybe poor in gold, and (2) Quartz veins occurred within a ‘mineralized zone’ of about 100 m in width and ~1,000 m in length. The gold mineralization is strongly overprinted by an argillic alteration zone. The mineralization-alteration zone is probably parallel to the mica schist foliation and strongly controlled by N-S or NE-SW-trending structures. The gold-bearing quartz veins are characterized by banded texture particularly colloform following host rock foliation and sulphide banding, brecciated, and rare bladed-like texture. The alteration types consist of propylitic (chlorite, calcite, sericite), argillic, and carbonation represented by graphite banding and carbon flakes. The ore mineralization is characterized by pyrite, native gold, pyrrhotite, and arsenopyrite. Cinnabar, stibnite, chalcopyrite, galena, and sphalerite are rare or maybe absent. In general, sulphide minerals are rare (<3%). Fifteen rock samples were collected in Wamsaid area for geochemical assaying for Au, Ag, As, Sb, Hg, Cu, Pb, and Zn. Eleven of fifteen samples yielded more than 1.00 g/t Au, in which six of them are in excess of 3.00 g/t Au. It can be noted that all high-grade samples are originally or containing limonitic materials, that suggest the role of supergene enrichment. Interestingly, most of the high-grade samples contain also high grade As (up to 991ppm), Sb (up to 885 ppm), and Hg (up to 75 ppm). Fluid inclusions in both quartz vein types consist of four phases including L-rich, V-rich, L-V-rich, and L1-L2-V (CO2)-rich phases. Mineralizing hydrothermal fluid is typified by CO2-rich fluid, moderate temperature of 300 - 400 ºC and a typical low salinity (0.36 to 0.54 wt.% NaCl eq). Based on those key features, gold mineraliza­tion in Buru Island meets the characteristics of LS epithermal or orogenic gold deposit types; however, it tends to be fitter with orogenic gold deposit rather than another type.  
Tephra-stratigraphy and Ash Componentry Studies of Proximal Volcanic Products at Mount Tangkuban Parahu, Indonesia: An Insight to Holocene Volcanic Activity Angkasa, Syahreza S.; Ohba, Tsukasa; Imura, Takumi; Setiawan, Iwan; Rosana, Mega
Indonesian Journal on Geoscience Vol 6, No 3 (2019): in-press
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.6.3.235-253

Abstract

Tangkuban Parahu Volcano is one of the most active volcanoes in West Java, Indonesia, although most of the recent eruptions were relatively mild (e.g. 2013 eruption). However, there is still little information from the volcanic products in the proximal area. Here, a new documentation from the proximal volcanic succession is provided, including tephra-stratigraphy, componentry analysis, and petrography of volcanic products. Detailed mapping of the proximal area shows that the volcanic products are predominantly composed of alternating fine-clay and coarse ash, lapilli tuff, and pyroclastic breccia within ten tephra units. Componentry of ash particles revealed the presence of five components, associated with hydrothermally altered lithics, oxidized lithics, coherent crystalline lithics, magmatic juvenile, and free crystal in entire eruptive products. These indicate that the subvolcanic hydrothermal system has been developed since the Holocene and associated with a continual introduction of magmatic intrusion. Petrographic observation shows the presence of hydrothermal minerals of quartz or silica accompanied by alunite and kaolinite, representing acidic alteration within the crater-conduit. The existence of a silicified zone indicates that the subvolcanic hydrothermal system played an essential role as a cap-rock of pressurized gas and steam at depth (200-500 m), whereas magmatic injection caused the vapour plume expansion. The observation concluded that the proximal volcanic succession captured the evidence of coupled phreatic and phreatomagmatic activities during the latest development of Mount Tangkuban Parahu.
Co-Authors Abdul Azis Abdurrahman, Muhammad Hanif Achmad Hidayatno Adian Fatchur Rochim Aditya Bakti Priahutama Affriani, Asri Ria Agung Warsito Ahmad Asmedi Ahmad Shafi Mukhaitir Ahmad Thoriq Al Achmad, Syah Jahan Al Komar, Ro'ad Baladi Amalia, Bevy Andreas Handojo Andrey Wicaksono, Andrey Andrian Kristianto Andrian, Juan Andrini, Raissa Fidela Angkasa, Syahreza S. Ariani, Nofi Risa Arif Ismail Arifudin Idrus Aris Triwiyatno Arrasyid, Riko Arsyahadij, Miftahuddin Aryati, Yosephine Vania Prima Asmara, Indrawati Yudha Astian, Astian Aulia Rahman Aziza, Sitty Nur B Devina Puspasari bagja waluya, bagja Bambang Winardi Basuki, Akbari Indra Benggadinda, Annisa Budi Setiyono Cakranegara, Pandu Adi Chay Asdak Colin R Trainor Cuandra, Fendy Dani Garnida Darjat Darjat Darsiharjo Dasiharjo Dede Rohmat Dede Sugandi Denis Denis Dian Agista Dian Masita Dewi Dianto, Ryan Dista Yoel Tadeus Dwi Lesmana Dzakwan, Muhammad Irfan Eddy Jajang Jaya Atmadja Endang Sujana Ernowo Ernowo Fadlin Idrus Fajar Wisnu Aribowo Fariz, Fiqih Anugerah Fatmawati, Suci Muslikah Feti Fahmimroah, Feti Fifi Swandari Fitri Rahmafitria, Fitri Franklin Franklin Friska, Yuliana Gayatri, Maria Habibnur, Yoshua Hafiez Sofyani Handoko, Bagus Imran Saptadji Hanna Goenawan Hanny Hafiar Hariri, Azka Haris Faulidi Asnawi Harsono Harsono Hastuti - Sekolah Tinggi Ilmu Kesehatan Nasional Surakarta, Diah Dwi Hendri Donnel Hengky Leon Hepi Hapsari Hermawan Hermawan Heru, Mochammad Hesinto, Sebri Hill Gendoet Hartono Himayah, Shafira Horng, Shi Jinn Imura, Takumi Irkham, Irkham Ismawati, Heny Isnan Fauzan Akrom Iwan, Cecep Darul Iza, Nurlaely Rohmatul Jusagemal Aria EL Justinus Andjarwirawan Keith Martin Koesputra, Mohammad Fadhil Kukuh Priyangga Laras Dwi Kawuri Lies Sulistyowati Lili Somantri M Charlotte Benstead Maria Teodora Ping, Maria Teodora marthani, marthani Martina Nainggolan Mochammad Facta Moetamar Moetamar Moh. Dede Muhammad Fairuz Luthfa Muhammad Fathul Faris Muhammad Riyadi Muhammad Supono Kurniawan Mulia, Vania Katherine Munawar Agus Riyadi Muttaqin, Syaoqi Nova Sylviana Novena Yety Lindawati, Novena Yety Nugraha, Diva Nugroho, Agung Nugroho, Muhammad Arief Nur Syamsiyah Nurlaela, Lisda Ohba, Tsukasa Phil J Benstead Pradana, Byan Bagas Pradana, Muhammad Ivan Prasetya, Agysta Rama Prasetyo, Heri Prasetyo, Wibowo Budi Prestian Rindho S. Purwanto, Aji Puspitasari, Mardiana Dwi Raf Drijvers Rahmadhony, Aditya Rahmawati, Desi Ana Rano Gusman Namara Ray, Hamidie Ronald Daniel Ricky Ricky Rina Nuryati, Rina Rizky Mulya Sampurno Ronny Lesmana Roron Wicaksono Hadi Rosana, Mega Rosiyadi, Didi Safitri, Romadona Ayu Sandjojo, Ferry Aditya Saptaji, Kushendarsyah Saputra, Eko Wirahadi Saryanti, Dwi Saryanti, Dwi Saryati, Dwi SATRIYAS ILYAS Setiyawidi Setiyawidi, Setiyawidi Shalahuddin, Muhammad Nadzir Shofiyani, Deti Sigit Purwanto Silalahi, Indra Pribady Sudantoko, Eri Sudjadi Sudjadi Suhartini Suhartini Sukmandaru Prihatmoko Sulistomo, Pinandito Sulistyani Sulistyani Sumardi . Suroso, Segal Mancini Surya Wisnurahutama Susatyo Handoko Taniady, Vicky Tejo Sukmadi Teuku Winnetou Thoyyibah, Ita Tri Bagus Susilo Trias Andromeda Trisna Insan Noor, Trisna Insan Unang Supratman Vita Murniati Tarawan Wahyudi Wahyudi Wahyuni, Lies Wanjat Kastolani Widianingrum, Sinta Widjadtuti, Tuti Windarta, Agung Wiwin Tanwiriah Yohana F. Cahya Palupi Meilani Yuli Christyono Yuni Susanti Pratiwi, Yuni Susanti Yusuf Dewantoro Herlambang Zabib Bashori Zaid, Ahmad Zulhar, Fachrian