Research Achievements - Original paper -

The age and origin of the Ruwai polymetallic skarn deposit, Indonesia: evidence of Cretaceous mineralization in the Central Borneo Metallogenic Belt

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

DOI

Geology and geochemistry of the gold mineralization at the Namicupo prospect, Mozambique Belt, northeastern Mozambique

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

DOI

Geology, geochemistry, and genesis of gold mineralization in the Chifumbazi deposit of the Tete Province, Irumide Belt, Mozambique

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

DOI

Geology, mineralization and calcite-rich potassic alteration at the Humpa Leu East (HLE) porphyry Cu-Au prospect, Hu'u district, Sumbawa Island, Indonesia

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

DOI

Proximal to distal geochemical variations of the Ruwai polymetallic skarn deposit, Central Borneo, Indonesia: Insights from sulfides chemistry and implications to exploration

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

DOI

Magmatic evolution and metal systematics of back-arc volcanic rocks of north–east Japan and implications for deposition of massive sulphide Kuroko ores

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

DOI

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

DOI

Heterogeneity of mineral chemistry and sulfur isotopic composition of alunite in the Mankayan lithocap, northern Luzon, Philippines  

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

DOI

Breccia and vein mineralization of the Balatoc Diatreme, Acupan gold deposit, Baguio Mineral District: An example of a diatreme-hosted epithermal deposit in the Philippines

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

DOI

An integrated geoscience approach to effective formalization of artisanal mining in sub-Saharan Africa: A case study of Namuno District, northeastern Mozambique

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

DOI

Mineralization styles and ore-forming conditions of the quartz-fragment-rich breccia (QBX) at the Didipio alkalic porphyry Cu-Au deposit, Nueva Vizcaya, Philippines

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

DOI

High-sulfidation epithermal – porphyry transition in the Kumbokarno prospect, Trenggalek district, East Java, Indonesia: constraints from mineralogy, fluid inclusion and sulfur isotope studies

Finlan Adhitya Aldan, Arifudin Idrus, Ryohei Takahashi and Genki Kaneko

Resource Geology   72 ( 1 ) e12289   2022.03  [Refereed]

Research paper (journal)   International Co-author

DOI

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

DOI

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

DOI

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

DOI

Geology, mineralogy, and sulfur isotopes of the Mowana copper deposit, Matsitama Schist Belt, NE Botswana

Amogelang KOOGANNE, Akira IMAI, Andrea AGANGI and Ryohei TAKAHASHI

Resource Geology   71 ( 4 ) 320 - 338   2021.06  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Geological and geochemical characterization of the Nanlia and Makorongo gold prospects, northeastern Mozambique

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

DOI

Overprinting Porphyry-Type Veinlets on the Intrusive Rocks and Phreatomagmatic Breccias in the Southwest Prospect, Southwestern Sto. Tomas II (Philex), Baguio District, Philippines

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

DOI

Lithogeochemistry of hydrothermally-altered host rocks by multiple mineralizations in the Mankayan Mineral District, Philippines

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

DOI

Geochemistry and fluid inclusions analysis of vein quartz in the multiple hydrothermal systems of Mankayan mineral district, Philippines

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

DOI