Research Achievements - Original paper -

Geochemistry and geochronology of VHMS mineralization in the Sangkaropi district, central-West Sulawesi, Indonesia: Constraints on its tectono-magmatic setting

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

DOI

Mineralogical and geochemical characteristics of the Utanobori gold deposit in northern Hokkaido, Japan

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

DOI

Geology, alteration and mineralization of the Kay Tanda epithermal gold deposit, Lobo, Batangas, Philippines

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

DOI

Geological and geochemical characteristics of gold mineralization in the Salu Bulo prospect, Sulawesi, Indonesia

Muhammad Zain Tuakia, Ryohei Takahashi and Akira Imai

Resource Geology   69 ( 2 ) 176 - 192   2018.12  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

The Kago low-sulfidation gold and silver deposit: A peripheral mineralization to the Nansatsu high-sulfidation system, Southern Kyushu, Japan

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

DOI

Mineralization of the Northwest Quartz-Pyrite-Gold (QPG) veins: Implications for multiple mineralization events in Lepanto, Mankayan Mineral District, northern Luzon, Philippines

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

DOI

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

DOI

Ore genesis and geochemical characteristics of carbonate-hosted talc deposits in Nangarhar province, Afghanistan

M. Tahir, A. Imai, R. Takahashi and S. Yano

Resource Geology   68 ( 4 ) 352 - 372   2018.06  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Testing the plagioclase discriminator on the GEOROC database to identify porphyry-fertile magmatic systems in Japan

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

DOI

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

DOI

Characteristics and behavior of hydrothermal fluids for gold mineralization at the Hishikari deposits, Kyushu, Japan

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

DOI

Geochemical behavior of rare earth elements in weathered granitic rocks in northern Palawan, Philippines

Jenielyn T. Padrones, Akira Imai and Ryohei Takahashi

Resource Geology   67 ( 3 ) 231 - 253   2017.04  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Statistical evaluation of Baedisifu mineralization-related stream sediment Mamberamo Raya regency, Papua province Indonesia

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

Effect of NO2 in exhaust gas from an oxyfuel combustion system on the cap rock of a proposed CO2 injection site

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

DOI

Fluid inclusion and stable isotope study at the southeastern Martabe deposit: Purnama, Barani and Horas ore bodies, North Sumatra, Indonesia

Stephanie Saing, Ryohei Takahashi and Akira Imai

Resource Geology   66 ( 2 ) 127 - 148   2016.03  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

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

DOI

Au–Ag–Te mineralization of the low-sulfidation epithermal Aginskoe deposit, Central Kamchatka, Russia

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

DOI

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

DOI

The roles of pyrite and calcite in the mobilization of arsenic and lead from hydrothermally altered rocks excavated in Hokkaido, Japan

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

DOI

Mobilization and speciation of arsenic from hydrothermally altered rock in laboratory column experiments under ambient conditions

Carlito Baltazar Tabelin, Toshifumi Igarashi, Ryohei Takahashi

Applied Geochemistry   27 ( 1 ) 326 - 342   2012.01  [Refereed]

Research paper (journal)   Domestic Co-author

DOI