Research Achievements - Original paper -

Transition from magmatic to phreatomagmatic eruptions in Young Ciremai volcano, Indonesia: insights from stratigraphy, componentry, and textural analysis of tephra deposits

Wildan N. Hamzah, Tsukasa Ohba, Muhammad Andriansyah Gurusinga, Mradipta L. A. Moktikanana, Jananda N. Indriyanto, Takashi Hoshide, Mirzam Abdurrahman, Idham A. Kurniawan, Fadlin

Earth, Planets and Space     2025.02  [Refereed]

Research paper (journal)   International Co-author

DOI

Origin and evolution of serpentinized peridotite from the Ciletuh Mélange in Sunda Arc, Indonesia: Evidence from petrography, mineralogy, and geochemistry

Rinaldi Ikhram, Takashi Hoshide, Tsukasa Ohba, Mega Fatimah Rosana, Adi Hardiyono

Journal of Asian Earth Sciences: X     2025.01  [Refereed]

Research paper (journal)   International Co-author

DOI

Origin of two types of olivine from the Ogi Picritic Dolerite Sill, northeast Japan

Akira CHIBA, Takashi HOSHIDE, Satoshi TANABE

Journal of Mineralogical and Petrological Sciences   119 ( 1 )   2024.11  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Brecciation and fracturing by water ingress into the Genbudo basaltic andesitic lava flow, Iwate volcano, northeastern Japan

Takashi Hoshide, Nao Ishibashi, Keisuke Iwahashi

Bulletin of Volcanology     2024.01  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Petrogenesis of the Morobe Granodiorite and their shoshonitic mafic microgranular enclaves in Maramuni arc, Papua New Guinea

Takashi Hoshide, Angela Bokuik, Tatsuki Ishikawa

Open Geosciences ( De Gruyter )    2023.12  [Refereed]

Research paper (journal)   International Co-author

DOI

Characteristics of ash particles from the maar complex of Lamongan Volcanic Field (LVF), East Java, Indonesia: How textural features and magma composition control ash morphology

Gurusinga, M. A., Ohba, T., Harijoko, A. and Hoshide, T.

Volcanica     2023.11  [Refereed]

Research paper (journal)   International Co-author

DOI

Eruptive history of the last-1300-years activity of Kelud volcano, Indonesia: Inferences from stratigraphy, chronology, sedimentology, componentry, and geochemistry

Jananda N. Indriyanto, Tsukasa Ohba, Takashi Hoshide, Syahreza S. Angkasa, Mirzam Abdurrachman

Journal of Volcanology and Geothermal Research ( Elsevier )    2022.11  [Refereed]

Research paper (journal)   International Co-author

DOI

Cooling processes of a dolerite sill inferred from the variations in plagioclase aspect ratio, Atsumi District, north-eastern Japan

Kentaro Kondo, Takashi Hoshide

Geosciences Journal ( Springer Nature )    2022.01  [Refereed]

Research paper (journal)   Domestic Co-author

The upper Kayaoka sheet in the Atsumi area, Northeast Japan, has an alkaline-basaltic composition. The modal olivine and Ni enrichment in the lower part of the sheet indicates the accumulation of early formed olivine crystals. Overall, the average aspect ratio of plagioclase increases from the central part of the sheet toward both the top and bottom margins. The average aspect ratios of plagioclase and calculated crystallisation times at each height of the sheet, except for the lowermost margin, are roughly plotted near the regression line drawn based on those from many sills in previous research. However, we observed that the average aspect ratios of plagioclase in some horizons of the central part of the sheet exhibit an offset from the regression line. The olivine analcite dolerite in the central part of the sheet is rich in zeolite amygdules and glassy mesostasis with a quench texture. These observations suggest that the cooling rate in the central part of the sheet was faster compared with assuming conductive cooling only. A plausible mechanism for the rapid cooling at the centre of the sheet is heat transport by the convection of seawater that has infiltrated the columnar joint.

DOI

Simultaneous Analysis of Seismic Velocity and Electrical Conductivity in the Crust and the Uppermost Mantle: A Forward Model and Inversion Test Based on Grid Search

Hikaru Iwamori, Kenta Ueki, Takashi Hoshide, Hiroshi Sakuma, Masahiro Ichiki, Tohru Watanabe, Michihiko Nakamura, Hitomi Nakamura, Tatsuji Nishizawa, Atsushi Nakao, Yasuo Ogawa, Tatsu Kuwatani, Kenji Nagata, Tomomi Okada, Eiichi Takahashi

Journal of Geophysical Research: Solid Earth ( American Geophysical Union )  126 ( 9 )   2021.09  [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, Hinako Sato

Ore Geology Reviews ( Elsevier )    2022.02  [Refereed]

Research paper (journal)   International Co-author

DOI

Deep crustal crystallization of tholeiitic melt: Insights from Manguao Basalt, Palawan, Philippines

James Cesar, Avisado REFRAN, Tsukasa OHBA, Carlo Abundo ARCILLA, Takashi HOSHIDE, Maria Ines Rosana, D. BALANGUE–TARRIELA

Journal of Mineralogical and Petrological Sciences ( Japan Association of Mineralogical Sciences )  115 ( 6 ) 440 - 456   2020.12  [Refereed]

Research paper (journal)   International Co-author

Temporal Variations of Petrological Characteristics of Tangkil and Rajabasa Volcanic Rocks, Indonesia

Reza Firmansyah Hasibuan, Tsukasa Ohba, Mirzam Abdurrachman, Takashi Hoshide

Indonesian Journal on Geoscience ( Geological AgencyMinistry of Energy and Mineral Resources )  7 ( 2 ) 135 - 159   2020.08  [Refereed]

Research paper (journal)   International Co-author

DOI

Site GT2: transition from foliated to layered gabbros

Kelemen, P.B., Matter, J.M., Teagle, D.A.H., Coggon, J.A., and the Oman Drilling Project Science Team

Proceedings of the Oman Drilling Project: College Station, TX (International Ocean Discovery Program) ( International Ocean Discovery Program )    2020.08  [Refereed]

Research paper (journal)   International Co-author

Site GT1: layered cumulate gabbros and deep fault zones

Kelemen, P.B., Matter, J.M., Teagle, D.A.H., Coggon, J.A., and the Oman Drilling Project Science Team

Proceedings of the Oman Drilling Project: College Station, TX (International Ocean Discovery Program) ( International Ocean Discovery Program )    2020.08  [Refereed]

Research paper (journal)   International Co-author

Topography and landslides in weathered granitic rock areas—Hai Van landslide in central Vietnam

Abe S, Dinh Van Tien, Do Ngoc Ha, Takashi Hoshide, Tadashi Nishitani & Toyohiko Miyagi

Landslides ( Springer Nature )  15 ( 8 ) 1675 - 1689   2018.08  [Refereed]

Research paper (journal)   International Co-author

DOI

Spinel inclusions in olivine and plagioclase crystals in a layered gabbro: a marker and a tracer for primary phenocrysts in a differentiating magma reservoir

Takashi Hoshide, Masaaki Obata

Contributions to Mineralogy and Petrology ( Springer Nature )  168   2014.08  [Refereed]

Research paper (journal)   Domestic Co-author

The problem of whether cumulate rocks were formed by crystal settling or by in situ crystallization after magma emplacement is an important issue concerning the mechanisms of magmatic differentiation. However, it is hard to distinguish these two processes for plutonic rocks because the primary texture and chemical composition have generally been modified by postcumulus processes. To contribute this problem, we studied the distribution and compositions of Cr-spinel inclusions hosted in olivine and plagioclase in the Murotomisaki Gabbroic Intrusion (MGI), SW Japan. It is shown that the olivine-hosted inclusions are restricted to specific horizons where accumulation of olivine phenocrysts is thought to have occurred and that the compositional variations of the Cr-spinel are explained by a secondary compositional modification that probably took place after the magma emplacement. It is also shown that the Cr-spinel inclusions in a chilled margin have suffered the least compositional modification and nearly retains the primary composition. Those in the interior of the intrusion, on the contrary, have been significantly modified by re-equilibration with residual melt driven by cation diffusions through the host phases. Those in plagioclase have been less modified. It is shown that all the spinel inclusions had primarily the same and common composition at the time of magma emplacement. This implies that all the inclusion-bearing crystals, olivine and plagioclase, represent primary phenocrysts that had already existed in the emplaced magma. In this way, spinel inclusion in the MGI may be regarded to be a useful petrographic “marker” for identifying intratelluric phenocrysts and also as a “tracer” to trace the motion of the primary phenocrysts after the magma emplacement.

DOI

Proc. IODP, 345: College Station, TX (Integrated Ocean Drilling Program)

Gillis, K.M., Snow, J.E., Klaus, A., and the Expedition 345 Scientists

Proceedings of the Integrated Ocean Drilling Program ( Integrated Ocean Drilling Program )    2014.02  [Refereed]

Research paper (journal)   International Co-author

DOI

Primitive layered gabbros from fast-spreading lower oceanic crust

Kathryn M. Gillis, Jonathan E. Snow, Adam Klaus, Natsue Abe, Álden B. Adrião, Norikatsu Akizawa, Georges Ceuleneer, Michael J. Cheadle, Kathrin Faak, Trevor J. Falloon, Sarah A. Friedman, Marguerite Godard, Gilles Guerin, Yumiko Harigane, Andrew J. Horst, Takashi Hoshide, Benoit Ildefonse, Marlon M. Jean, Barbara E. John, Juergen Koepke, Sumiaki Machi, Jinichiro Maeda, Naomi E. Marks, Andrew M. McCaig, Romain Meyer, Antony Morris, Toshio Nozaka, Marie Python, Abhishek Saha & Robert P. Wintsch

Nature ( Springer Nature )  505   204 - 207   2014.01  [Refereed]

Research paper (journal)   International Co-author

DOI

Integrated Ocean Drilling Program Expedition 345 Preliminary Report - Hess Deep Plutonic Crust Exploring the plutonic crust at a fast-spreading ridge: new drilling at Hess Deep

Expedition 345 Scientists

IODP Preliminary Report ( Integrated Ocean Drilling Program )    2014.01  [Refereed]

Research paper (journal)   International Co-author

DOI

Amphibole-bearing multiphase solid inclusions in olivine and plagioclase from a layered gabbro: origin of the trapped melts

Takashi Hoshide and Masaaki Obata

Journal of Petrology ( Oxford University Press )  53 ( 2 ) 419 - 449   2012.01  [Refereed]

Research paper (journal)   Domestic Co-author

室戸岬斑れい岩体の集積鉱物（かんらん石・斜長石）に包有される含角閃石多相固体包有物の産状と化学組成を詳細に調べた。その結果、多相固体包有物の化学組成は、本岩体の結晶分化でできるメルトの組成から大きくかけ離れ、包有物のホスト鉱物の化学組成の方へ偏っていることがわかった。そのことから、集積鉱物に見られる多相固体包有物は、固液境界層内での流体相の移動に伴って起きた集積鉱物の再溶解で局所的にできた特異な化学組成のメルトを取り込んだことで形成されたと主張した。

DOI