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作者:Hiroshi A. Takahashi , Kuniyo Kawabata ...
来源:[J].Journal of Hydrology(IF 2.964), 2020, Vol.580Elsevier
摘要:Abstract(#br)Quasi-periodic sampling and analysis of spring water were conducted at nine sites to investigate the effects of the 2016 Kumamoto earthquake on the major chemical composition, including hydrogen, and oxygen stable isotopic ratios, of spring waters. Transient inc...
作者:Hiroshi A. Takahashi , Fumiaki Tsunomori ...
来源:[J].Journal of Hydrology(IF 2.964), 2020, Vol.584Elsevier
摘要:Abstract(#br)This study examined radon concentrations in springs in Kumamoto and Aso regions following the 2016 Kumamoto earthquake, in addition to monitoring springs near the Futagawa-Hinagu fault zone for more than two years following the earthquake to investigate the relations...
作者:Hiroshi A. Takahashi , Masayo Minami ...
来源:[J].Nuclear Inst. and Methods in Physics Research, B(IF 1.266), 2019, Vol.455, pp.195-200Elsevier
摘要:Abstract(#br)The preservation of unpoisoned water samples was investigated by radiocarbon analysis with five kinds of natural waters. Although refrigerated and shielded from light, the unpoisoned samples underwent carbon isotopic changes, even after short periods of storage ...
作者:... Mitsuhiro Ooki , Hiroshi A. Takahashi , Ryuta Furukawa
来源:[J].Chemical Geology(IF 3.154), 2015, Vol.414, pp.42-58Elsevier
摘要:Abstract(#br)Active volcanoes from Hokkaido are distributed along the SW–NE trending volcanic front, where the subducting Pacific plate changes direction from N–S to WSW–ESE. One exception is the Tokachi volcano, which is located approximately 50 km to the north-west of...
作者:... Naoto Takahata , Frank T. Yang , Hiroshi A. Takahashi
来源:[J].Journal of Volcanology and Geothermal Research(IF 2.193), 2015, Vol.303, pp.7-15Elsevier
摘要:Abstract(#br)The Tatun Volcanic Group (TVG), Northeastern Taiwan, is considered to be the extension of the Ryukyu arc, and belongs to the post-collisional collapse Okinawa Trough. Strong hydrothermal activity is concentrated along the Chinshan fault, and Da-you-keng (DYK) re...
作者:Hiroshi A. Takahashi , Noritoshi Morikawa
来源:[J].Journal of Hydrology(IF 2.964), 2014, Vol.511, pp.295-309Elsevier
摘要:Summary(#br)Groundwater residence times in Nakano-shima Island, Oki-Dozen, Japan, which is situated on the continental shelf, are discussed based on groundwater-age indices (CFCs, 3 H, and 14 C), stable isotopic ratios of hydrogen (δD), oxygen (δ 18 O), carbon (δ 13 C), and ...

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