Research Achievements - Original paper -

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

Characteristics and mineralization age of the Fukusen No. 1 vein, Hishikari epithermal gold deposits, Southern Kyushu, Japan

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

DOI

Chemistry of cassiterite in rare metal granitoids and the associated rocks in the Eastern Desert, Egypt

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

DOI

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

DOI

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

DOI

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

DOI

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