Research Achievements - Original paper -
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Geochemistry and U-Pb geochronology of garnet from the Somerset and Arab gold deposits, Vumba Greenstone Belt, northeastern Botswana: implications for the timing of gold mineralization
Lebogang Mokane, Andrea Agangi, Ryohei Takahashi, Thierry Bineli Betsi, Kelebogile Phili, Manuel Nopeia, Tebogo Kelepile, Mayuko Fukuyama, Zibisani Bagai, and Pearlyn Manalo
Resource Geology 75 ( 1 ) RGE70012 - (In production) 2025.07 [Refereed]
Research paper (journal) International Co-author
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Andrea Agangi, Gabriela Nogo Retnaningtyas Bunga Naen, Manuel Nopeia, Hossain Amini, Ryohei Takahashi and Pearlyn Manalo
Terra Nova TER12784 1 - 7 2025.05 [Refereed]
Research paper (journal) International Co-author
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Renaldi Suhendra, Andrea Agangi, Ryohei Takahashi, Marlina A. Elburg, Muhammad Zain Tuakia, Hartaja Wicaksono, Hinako Sato, Iwan Setiawan
Journal of Asian Earth Sciences 281 106506 2025.03 [Refereed]
Research paper (journal) International Co-author
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Andrea Agangi, Axel Hofmann, Takuya Echigo, Robert Bolhar, Daisuke Araoka, Vincent Mashoene, Lucia T. Ndhlovu, Ryohei Takahashi, Pearlyn C. Manalo
Chemical Geology 673 ( 5 ) 122 - 442 2025.02 [Refereed]
Research paper (journal) International Co-author
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Jonathan Macuroy, Ryohei Takahashi, Akira Hara, Yoshinori Okaue, Akira Imai, Pearlyn Manalo, Hinako Sato, and Andrea Agangi
Journal of Geochemical Exploration 268 107602 2025.01 [Refereed]
Research paper (journal) Domestic Co-author
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Mineralization characteristics of the Hokuryu epithermal Au-Ag deposit, Hokkaido, Japan
Omar Baculna Soberano, Ryohei Takahashi, Pearlyn Manalo, Andrea Agangi, Hinako Sato, and Manuel Nopeia
Resource Geology 75 ( 1 ) e70003 2025.01 [Refereed]
Research paper (journal) International Co-author
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Characteristics of the Kematu epithermal gold deposit at Tboli, Mindanao, Philippines
Alan Royce B. Tizon, Jillian Aira S. Gabo-Ratio, Pearlyn Manalo, Ryohei Takahashi, Ma. Yna Rose D. Garcia, and Juan Alex Vianne D. Amoroso
Resource Geology 74 ( 1 ) e12339 2024.10 [Refereed]
Research paper (journal) International Co-author
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Abner Nghoongoloka, Ryohei Takahashi, Pearlyn Manalo, Andrea Agangi, Hinako Sato, Helke Mocke, Manuel Nopeia, Nigel Blamey, Tavis Enno, and Rob Bowell
Resource Geology 74 ( 1 ) e12341 2024.10 [Refereed]
Research paper (journal) International Co-author
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Manuel Nopeia, Akira Imai, Kotaro Yonezu, Ryohei Takahashi, Andrea Agangi, and Daud Jamal
Journal of African Earth Sciences 218 105350 2024.07 [Refereed]
Research paper (journal) International Co-author
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Arifudin Idrus, Genki Kaneko, Ryohei Takahashi, Finlan Adhitya Aldan, Trifatama Rahmalia, and Hinako Sato
Geological Journal 59 2990 - 3016 2024.07 [Refereed]
Research paper (journal) International Co-author
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Takumi Imura, Tsukasa Ohba, Ryohei Takahashi, Pearlyn Manalo, Hinako Satoh, Masao Ban, Aoi Hirata, and Antonio M. Álvarez-Valero
Journal of Volcanology and Geothermal Research ( Elsevier ) 452 108127 2024.06 [Refereed]
Research paper (journal) International Co-author
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Kelebogile Phili, Thierry Bineli Betsi, Tebogo Kelepile, Ryohei Takahashi, and Lebogang Mokane
Economic Geology 119 ( 3 ) 551 - 571 2024.05 [Refereed]
Research paper (journal) International Co-author
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Renaldi Suhendra, Ryohei Takahashi, Andrea Agangi, Akira Imai, Hinako Sato, and Nugroho Imam Setiawan
Ore Geology Reviews 166 105966 2024.02 [Refereed]
Research paper (journal) International Co-author
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Jonathan Macuroy, Ryohei Takahashi, Akira Hara, Yoshinori Okaue, Akira Imai, Pearlyn Manalo, Hinako Sato, and Andrea Agangi
Resource Geology 73 ( 1 ) e12318 2023.08 [Refereed]
Research paper (journal) Domestic Co-author
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Cendi D.P. Dana, Andrea Agangi, Arifudin Idrus, Cyril Chelle-Michou, Chun-Kit Lai, Mizuki Ishida, Marcel Guillong, Ignacio González-Álvarez, Ryohei Takahashi, Moei Yano, Kazuhide Mimura, Junichiro Ohta, Yasuhiro Kato, Doly R. Simbolon, and Xiao-Ping Xia
Economic Geology 118 ( 6 ) 1341 - 1370 2023.05 [Refereed]
Research paper (journal) International Co-author
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Manuel Nopeia, Akira Imai, Ryohei Takahashi, Kotaro Yonezu, Andrea Agangi, Daud Jamal, Pearlyn Manalo, Thomas Tindell and Hinako Sato
Journal of Geochemical Exploration 249 107220 2023.04 [Refereed]
Research paper (journal) International Co-author
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Euclesia P. F. Cossa, Andrea Agangi, Ryohei Takahashi, Pearlyn Manalo, Akira Imai and Vicente Manjate
Resource Geology 73 ( 1 ) e12308 2023.02 [Refereed]
Research paper (journal) International Co-author
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Fadlin, Ryohei Takahashi, Andrea Agangi, Hinako Sato, Arifudin Idrus, Bronto Sutopo and Rachmat Pratiwinda
Resource Geology 73 ( 1 ) e12309 2023.02 [Refereed]
Research paper (journal) International Co-author
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Arifudin Idrus, Cendi D.P. Dana, Chun-Kit Lai, Andrea Agangi, Ryohei Takahashi, and Evin H. Rajagukguk
Journal of Geochemical Exploration 218 Article 107161 2023.01 [Refereed]
Research paper (journal) International Co-author
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Agangi A., Manalo P.C., Takahashi R., Veeravinantanakul A., and Elburg M.A.
Contributions to Mineralogy and Petrology 177 ( 12 ) art. no. 115 2022.11 [Refereed]
Research paper (journal) International Co-author
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Primary source of placer gold in the Luk Ulo Metamorphic Complex, Central Java, Indonesia
Renaldi Suhendra, Ryohei Takahashi, Akira Imai, Hinako Sato, Nugroho Imam Setiawan, and Andrea Agangi
Resource Geology 72 ( 1 ) e12300 2022.09 [Refereed]
Research paper (journal) International Co-author
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Pearlyn C. Manalo, Ryohei Takahashi, Akira Imai, Rhyza Ruth Parcon-Calamohoy, Mervin de los Santos, Leo Subang, Glenn Christian Alburo
Ore Geology Reviews 146 104959 2022.06 [Refereed]
Research paper (journal) International Co-author
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Acer Jian T. Figueroa, Jillian Aira S. Gabo-Ratio, Pearlyn C. Manalo, Ryohei Takahashi, Hinako Sato and Aljess B. Ramos
Ore Geology Reviews 144 art. no. 104826 2022.05 [Refereed]
Research paper (journal) International Co-author
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Manuel Nopeia, Salvador Mondlane, Ryohei Takahashi, Daúd Jamal, Isac Abdulgani, and Ivan Baptista
Extractive Industries and Society 11 101098 2022.05 [Refereed]
Research paper (journal) International Co-author
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Ma. Isabella Hermo, Maria Ines Rosana Balangue-Tarriela, Ryohei Takahashi, Jillian Aira Gabo-Ratio and Sofia Marah Frias
Ore Geology Reviews 143 art. no. 104724 2022.04 [Refereed]
Research paper (journal) International Co-author
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Finlan Adhitya Aldan, Arifudin Idrus, Ryohei Takahashi and Genki Kaneko
Resource Geology 72 ( 1 ) e12289 2022.03 [Refereed]
Research paper (journal) International Co-author
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Element mobility during formation of the Ruwai Zn-Pb-Ag skarn deposit, Central Borneo, Indonesia
Cendi D. P. Dana, Andrea Agangi, Ryohei Takahashi, Arifudin Idrus, Chun-Kit Lai and Nico A. Nainggolan
Resource Geology 72 ( 1 ) e12290 2022.03 [Refereed]
Research paper (journal) International Co-author
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Genesis of magmatic ilmenite ores associated with the Mazua ultramafic intrusion, NE Mozambique
David A. B. Unganai, Akira Imai, Ryohei Takahashi, Daud L. Jamal, Andrea Agangi, Takashi Hoshide and Hinako Sato
Ore Geology Reviews 143 art. no. 104760 2022.02 [Refereed]
Research paper (journal) International Co-author
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Zircon Hf-isotope constraints on the formation of metallic mineral deposits in Thailand
Apivut Veeravinantanakul, Ryohei Takahashi, Andrea Agangi, Tsukasa Ohba, Yasushi Watanabe, Marlina A. Elburg, Henriette Ueckermann, Pitsanupong Kanjanapayont and Punya Charusiri
Resource Geology 71 ( 4 ) 436 - 469 2021.07 [Refereed]
Research paper (journal) International Co-author
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Amogelang KOOGANNE, Akira IMAI, Andrea AGANGI and Ryohei TAKAHASHI
Resource Geology 71 ( 4 ) 320 - 338 2021.06 [Refereed]
Research paper (journal) Domestic Co-author
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Manuel Nopeia, Ryohei Takahashi, Akira Imai, Daúd Jamal and Andrea Agangi
Ore Geology Reviews 135 Article 104195 2021.04 [Refereed]
Research paper (journal) International Co-author
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Avriel Venis L. CIRINEO, Akira IMAI, Ryohei TAKAHASHI, Redempta P. BALUDA, Noel C. OLIVEROS, Victor B. MAGLAMBAYAN, Roy Ronald C. LUIS, Maria Lourdes M. FAUSTINO and Jacky ALMADIN
Resource Geology 71 ( 1 ) 1 - 40 2020.10 [Refereed]
Research paper (journal) International Co-author
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Pearlyn Manalo, Akira Imai, Ryohei Takahashi, Hinako Sato, Leo Subang and Mervin de los Santos
Journal of Geochemical Exploration 218 Article 106612 2020.07 [Refereed]
Research paper (journal) International Co-author
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Pearlyn C. Manalo, Leo L. Subang, Akira Imai, Mervin C. de los Santos, Ryohei Takahashi and Nigel J.F. Blamey
Resource Geology 70 ( 1 ) 1 - 27 2019.09 [Refereed]
Research paper (journal) International Co-author
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Adi Maulana, Theo van Leeuwen, Ryohei Takahashi, Sun-Lin Chung, Kenzo Sanematsu, Huan Li and Ulva Irfan
Ore Geology Reviews 114 1 - 17 2019.09 [Refereed]
Research paper (journal) International Co-author
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Thomas T. Sorulen, Ryohei Takahashi, So Tanaka, Kana Suzuki, Akira Imai, Yasushi Watanabe and Shingo Kikuchi
Resource Geology 69 ( 4 ) 402 - 429 2019.08 [Refereed]
Research paper (journal) Domestic Co-author
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Sofia Marah Pascual FRIAS, Akira IMAI, Ryohei TAKAHASHI, Ma. Ines Rosana BALANGUE-TARRIELA, Carlo ARCILLA and Nigel BLAMEY
Resource Geology 69 ( 4 ) 351 - 384 2019.05 [Refereed]
Research paper (journal) International Co-author
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Muhammad Zain Tuakia, Ryohei Takahashi and Akira Imai
Resource Geology 69 ( 2 ) 176 - 192 2018.12 [Refereed]
Research paper (journal) Domestic Co-author
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Thomas Tindell, Ryohei Takahashi, Akira Imai, Anders Schersten, Takeyuki Ogata, Kotaro Yonezu, Adrian Boyce, Koichiro Watanabe and Laurence Page
Ore Geology Reviews 2018 ( 102 ) 951 - 966 2018.11 [Refereed]
Research paper (journal) International Co-author
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Pearlyn Manalo, Akira Imai, Leo Subang, Mervin de los Santos, Kyoka Yanagi, Ryohei Takahashi and Nigel Blamey
Economic Geology 113 ( 7 ) 1609 - 1626 2018.11 [Refereed]
Research paper (journal) International Co-author
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Petrochemistry of granitoids along Loei fold belt, northeastern Thailand
P. Nualkhao, R. Takahashi, A. Imai and P. Charusiri
Resource Geology 68 ( 4 ) 395 - 424 2018.06 [Refereed]
Research paper (journal) International Co-author
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M. Tahir, A. Imai, R. Takahashi and S. Yano
Resource Geology 68 ( 4 ) 352 - 372 2018.06 [Refereed]
Research paper (journal) Domestic Co-author
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B. J. Williamson, M. Hodgkinson, A. Imai, R. Takahashi, R. N. Armstrong and R. J. Herrington
Resource Geology 68 ( 2 ) 138 - 143 2018.02 [Refereed]
Research paper (journal) International Co-author
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Petrochemistry of granitoids in Sibolga and its surrounding areas, North Sumatra, Indonesia
Iwan Setiawan, Ryohei Takahashi and Akira Imai
Resource Geology 67 ( 3 ) 254 - 278 2017.06 [Refereed]
Research paper (journal) Domestic Co-author
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Ryohei Takahashi, Ryo Tagiri, Nigel J. F. Blamey, Akira Imai, Yasushi Watanabe and Akito Takeuchi
Resource Geology 67 ( 3 ) 279 - 299 2017.06 [Refereed]
Research paper (journal) International Co-author
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Jenielyn T. Padrones, Akira Imai and Ryohei Takahashi
Resource Geology 67 ( 3 ) 231 - 253 2017.04 [Refereed]
Research paper (journal) Domestic Co-author
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Tonggiroh, A. and Takahashi, R.
Asian Journal of Microbiology, Biotechnology and Environmental Sciences 19 ( 4 ) 779 - 785 2017.04 [Refereed]
Research paper (journal) International Co-author
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Kosuke Tanaka, Hirokazu Okawa, Keiichiro Hashimoto, Ryohei Takahashi, Akira Imai and Katsuyasu Sugawara
Applied Geochemistry 70 17 - 26 2016.04 [Refereed]
Research paper (journal) Domestic Co-author
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Stephanie Saing, Ryohei Takahashi and Akira Imai
Resource Geology 66 ( 2 ) 127 - 148 2016.03 [Refereed]
Research paper (journal) Domestic Co-author
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Epithermal gold mineralization in the Trenggalek district, East Java, Indonesia
Ryohei Takahashi, Yuki Shingo, Akira Imai, Koichiro Watanabe, Agung Harijoko, I Wayan Warmada, Arifudin Idrus, Lucas Donny Setijadji, Phouvang Phoumephone, Anders Scherstén and Laurence Page
Resource Geology 64 ( 2 ) 149 - 166 2014.03 [Refereed]
Research paper (journal) International Co-author
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Elena D. Andreeva, Hiroharu Matsueda, Victor M. Okrugin, Ryohei Takahashi and Shuji Ono
Resource Geology 63 ( 4 ) 337 - 349 2013.09 [Refereed]
Research paper (journal) International Co-author
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Ore-forming ages and sulfur isotope study of hydrothermal deposits in Kamchatka, Russia
Ryohei Takahashi, Hiroharu Matsueda, Victor M. Okrugin, Naotatsu Shikazono, Shuji Ono, Akira Imai, Elena D. Andreeva, Koichiro Watanabe
Resource Geology 63 ( 2 ) 210 - 223 2013.03 [Refereed]
Research paper (journal) International Co-author
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C.B. Tabelin, T. Igarashi, S. Tamoto, R. Takahashi
Journal of Geochemical Exploration 119 17 - 31 2012.06 [Refereed]
Research paper (journal) Domestic Co-author
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Carlito Baltazar Tabelin, Toshifumi Igarashi, Ryohei Takahashi
Applied Geochemistry 27 ( 1 ) 326 - 342 2012.01 [Refereed]
Research paper (journal) Domestic Co-author
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Yuki Tohma, Akira Imai, Kenzo Sanematsu, Kotaro Yonezu, Ryohei Takahashi, Masaaki Koyama, Ryota Sekine, Robert Duncan, Koichiro Watanabe
Resource Geology 60 ( 4 ) 348 - 358 2010.11 [Refereed]
Research paper (journal) International Co-author
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Hamdy M. ABDALLA, Hiroharu MATSUEDA, Mohamed A. OBEID, Ryohei TAKAHASHI
Journal of Mineralogical and Petrological Sciences 103 ( 5 ) 318 - 326 2008.11 [Refereed]
Research paper (journal) International Co-author
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Epithermal gold-silver mineralization of the Asachinskoe deposit in South Kamchatka, Russia
Ryohei Takahashi , Hiroharu Matsueda, Victor M. Okrugin, Shuji Ono
Resource Geology 57 ( 4 ) 354 - 373 2007.11 [Refereed]
Research paper (journal) International Co-author
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Polymetallic and Au-Ag mineralizations at the Mutnovskoe deposit in South Kamchatka, Russia
Ryohei TAKAHASHI, Hiroharu MATSUEDA, Victor M. OKRUGIN, Shuji ONO
Resource Geology 56 ( 2 ) 141 - 156 2006.06 [Refereed]
Research paper (journal) International Co-author
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Hydrothermal gold mineralization at the Rodnikovoe deposit in South Kamchatka, Russia
Ryohei TAKAHASHI, Hiroharu MATSUEDA, Victor M. OKRUGIN
Resource Geology 52 ( 4 ) 359 - 369 2002.12 [Refereed]
Research paper (journal) International Co-author
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Characteristics of ore deposits for marine mineral recourses investigated by JOGMEC since 2014
Haruhisa MOROZUMI, Nobuaki ISHIKAWA, Miki CHIBA, Kazuo WATANABE, Takeyuki OGATA, Ryohei TAKAHASHI and Jun-ichiro ISHIBASHI
Shigen-Chishitsu ( The Society of Resource Geology ) 70 ( 1 ) 53 - 65 2020.06 [Refereed]
Research paper (journal) Domestic Co-author