Papers - Umeda Koji
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Zircon fission track ages for pyroclastics from the Mutsu Hiuchidake volcano and the basement rocks, Northeast Japan: Re examination of the latest volcanic history
Koji Umeda, Tohru Danhara
Japanese Magazine of Mineralogical and Petrological Sciences 37 ( 5 ) 131 - 136 2008
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Thermochronology of non-volcanic hydrothermal activity in the Kii Peninsula, Southwest Japan: Evidence from fission track dating and helium isotopes in paleo-hydrothermal fluids
Koji Umeda, Takahiro Hanamuro, Kunimi Yamada, Yoshimitsu Negishi, Hideki Iwano, Tohru Danhara
RADIATION MEASUREMENTS 42 ( 10 ) 1647 - 1654 2007.11
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Helium isotopes as geochemical indicators of a serpentinized fore-arc mantle wedge
Koji Umeda, Glen F. McCrank, Atusi Ninomiya
Journal of Geophysical Research: Solid Earth 112 ( 10 ) 2007.10
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Multiple lines of evidence for crustal magma storage beneath the Mesozoic crystalline Iide Mountains, northeast Japan
Koji Umeda, Koichi Asamori, Atusi Ninomiya, Sunao Kanazawa, Teruki Oikawa
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 112 ( B5 ) 2007.5
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Relationship between helium isotopes and heat flux from hot springs in a non-volcanic region, Kii Peninsula, southwest Japan
Koji Umeda, Yukihiro Sakagawa, Atusi Ninomiya, Koichi Asamori
GEOPHYSICAL RESEARCH LETTERS 34 ( 5 ) 2007.3
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Temporal-spatial variations of Plio-Pleistocene volcanic activity in the Ryohaku Mountains, central Japan : evidences from K-Ar ages
TANASE Atsushi, OIKAWA Teruki, NINOMIYA Atusi, HAYASHI Shintaro, UMEDA Koji
Bulletin of the Volcanological Society of Japan 52 ( 1 ) 39 - 61 2007.2
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Magnetotelluric imaging of crustal magma storage beneath the Mesozoic crystalline mountains in a nonvolcanic region, northeast Japan
Koji Umeda, Koichi Asamori, Tateyuki Negi, Yasuo Ogawa
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 7 2006.8
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Variations in the (3)He/(4)He ratios of hot springs on Shikoku Island, southwest Japan
K Umeda, S Kanazawa, C Kakuta, K Asamori, T Oikawa
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 7 2006.4
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Unusual cooling of the Middle Miocene Ichifusayama Granodiorite, Kyushu, Japan
T Oikawa, K Umeda, S Kanazawa, T Matsuzaki
JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES 101 ( 1 ) 23 - 28 2006.2
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Deep structure of the miocene igneous complex in the KII Peninsula, Southwest Japan, inferred from wide-band magnetotelluric soundings
Koji Umeda
Advances in Geosciences: Volume 1: Solid Earth (SE) 207 - 213 2006.1
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Aqueous fluids derived from a subducting slab: Observed high He-3 emanation and conductive anomaly in a non-volcanic region, Kii Peninsula southwest Japan
K Umeda, Y Ogawa, K Asamori, T Oikawa
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 149 ( 1-2 ) 47 - 61 2006.1
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K-Ar age of high magnesium andesite dikes at the Toki River in Gifu Prefecture, central Japan.
及川輝樹, 眞島英壽, 棚瀬充史, 二ノ宮淳, 梅田浩司
地質学雑誌 112 ( 10 ) 2006
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Heat Flux Distribution in Japan Taking Account of Advection Processes
SAKAGAWA Yukihiro, UMEDA Koji, ASAMORI Koichi
JGRSJ 28 ( 2 ) 211 - 221 2006
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Current status of the geoscientific research for long-term stability of the geological environment in the JNC's R & D programme
Umeda Koji, Osawa Hideaki, Nohara Tsuyoshi, Sasao Eiji, Fujiwara Osamu, Asamori Koichi, Nakatsuka Noboru
Journal of Nuclear Fuel Cycle and Environment 11 ( 2 ) 97 - 112 2005
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Geothermal Structure of the Southern Part of the Kii Peninsula Estimated from the Gravity Anomaly and the Deep Resistivity Structure
上原大二郎, 角田地文, 工藤健, 梅田浩司, 小川康雄, 棚瀬充史, 武田祐啓, 千葉昭彦, 鍵山恒臣
地震 57 ( 3 ) 2005
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Heat flux distribution in Japan with advection taken into account and non-isothermal flow simulation of Unzen volcano
Sakagawa Yukihiro, Umeda Koji, Asamori Koichi
Journal of Nuclear Fuel Cycle and Environment 11 ( 2 ) 157 - 166 2005
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Geophysical techniques for detecting magmas and high-temperature fluids;:their application to the Onikobe-Narugo volcanic region and the southern Kii Peninsula
Asamori Koichi, Umeda Koji
Journal of Nuclear Fuel Cycle and Environment 11 ( 2 ) 147 - 156 2005
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Modeling long-term volcanic hazards through Bayesian inference: An example from the Tohoku volcanic arc, Japan
AJ Martin, K Umeda, CB Connor, JN Weller, DP Zhao, M Takahashi
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 109 ( B10 ) 2004.10
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Database on the Temperature Profiles of Boreholes in Japan
Yukihiro SAKAGAWA, Koji UMEDA, Mototaka SUZUKI, Tatsuya KAJIWARA, Youhei UCHIDA
Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 57 ( 1 ) 63 - 67 2004
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Deep Structure of the Miocene Igneous Complex in the Kii Peninsula, Southwest Japan, Inferred from Wide-band Magnetotelluric Soundings
UMEDA Koji, UEHARA Daijiro, OGAWA Yasuo, KUDO Takeshi, KAKUTA Chifumi
Bulletin of the Volcanological Society of Japan 48 ( 6 ) 461 - 470 2003.12