Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Akira, Ijiri"'
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract The helium isotope ratio (3He/4He), concentration ratio of neon-20 to helium-4 (20Ne/4He), argon (Ar), krypton (Kr), and xenon (Xe) concentrations were measured in the porewater of surface sediments of several submarine mud volcanoes. From t
Externí odkaz:
https://doaj.org/article/c8467a52c27948f8b163ec874a509ec3
Autor:
Miho Asada, Mikiya Yamashita, Rina Fukuchi, Toshiyuki Yokota, Tomohiro Toki, Akira Ijiri, Kiichiro Kawamura
Publikováno v:
Frontiers in Earth Science, Vol 11 (2023)
We identified 27 new mud volcanoes, including potential ones, in a part of the Hyuga-nada area, southwest offshore Japan, at the northern end of the Ryukyu Trench, based on subseafloor geological structures using geophysical investigations. These mud
Externí odkaz:
https://doaj.org/article/e18705072eea4bf084472cc5e7584d06
Publikováno v:
Progress in Earth and Planetary Science, Vol 10, Iss 1, Pp 1-15 (2023)
Abstract It is necessary to purify diatom frustules by taxon to perform accurate geochemical analyses of diatom fossils preserved in sediments. However, the small size of diatoms has hitherto prevented taxon-specific purification; therefore, previous
Externí odkaz:
https://doaj.org/article/8242dd5a5d70487ab53bd6d83b9c9f5a
Publikováno v:
Frontiers in Marine Science, Vol 10 (2023)
Mud volcanoes can cause various geohazards, so it is very important to know their activity level and their distribution. Surface sediments were collected from four submarine mud volcanoes (MVs) off Tanegashima (SW Japan), namely, MV1, MV2, MV3, and M
Externí odkaz:
https://doaj.org/article/138934aa209740ffbf3b81e97b7f9e86
Autor:
Akira Ijiri, Ryoma Setoguchi, Yuki Mitsutome, Tomohiro Toki, Masafumi Murayama, Kyoko Hagino, Yohei Hamada, Takeyasu Yamagata, Hiroyuki Matsuzaki, Wataru Tanikawa, Osamu Tadai, Kazuya Kitada, Tatsuhiko Hoshino, Takuro Noguchi, Juichiro Ashi, Fumio Inagaki
Publikováno v:
Frontiers in Earth Science, Vol 11 (2023)
Mud volcanoes are topographic features through which over-pressurized sediments are intruded upward and erupted, transporting fluids and sediments from the deep subsurface to the surface/seafloor. To understand material and biogeochemical cycling thr
Externí odkaz:
https://doaj.org/article/91a8207ba86e420e8ab089ff145e49d4
Publikováno v:
Journal of Hydrology: Regional Studies, Vol 40, Iss , Pp 101051- (2022)
Study region: Spring along the southeast coast of Yonaguni Island, located at the western end of the Ryukyu forearc. Study focus: The chemical composition of groundwater, including SF6 concentration, was investigated to clarify the mechanism of groun
Externí odkaz:
https://doaj.org/article/84780ebc2bf54bcba22b6008ecfe2583
Autor:
Yohei Hamada, Takehiro Hirose, Akira Ijiri, Yasuhiro Yamada, Yoshinori Sanada, Saneatsu Saito, Noriaki Sakurai, Takamitsu Sugihara, Takahiro Yokoyama, Tomokazu Saruhashi, Tatsuhiko Hoshino, Nana Kamiya, Stephen Bowden, Margaret Cramm, Susann Henkel, Kira Homola, Hiroyuki Imachi, Masanori Kaneko, Lorenzo Lagostina, Hayley Manners, Harry-Luke McClelland, Kyle Metcalfe, Natsumi Okutsu, Donald Pan, Maija Jocelyn Raudsepp, Justine Sauvage, Florence Schubotz, Arthur Spivack, Satoshi Tonai, Tina Treude, Man-Yin Tsang, Bernhard Viehweger, David T. Wang, Emily Whitaker, Yuzuru Yamamoto, Kiho Yang, Masataka Kinoshita, Lena Maeda, Yusuke Kubo, Yuki Morono, Fumio Inagaki, Verena B. Heuer
Publikováno v:
Progress in Earth and Planetary Science, Vol 5, Iss 1, Pp 1-10 (2018)
Abstract The study investigates the in-situ strength of sediments across a plate boundary décollement using drilling parameters recorded when a 1180-m-deep borehole was established during International Ocean Discovery Program (IODP) Expedition 370,
Externí odkaz:
https://doaj.org/article/0dbb290c89424265b7dbfbaadd8e65a9
Autor:
Masaru Konishi Nobu, Ryosuke Nakai, Satoshi Tamazawa, Hiroshi Mori, Atsushi Toyoda, Akira Ijiri, Shino Suzuki, Ken Kurokawa, Yoichi Kamagata, Hideyuki Tamaki
Publikováno v:
The ISME Journal. 17:95-104
Serpentinization of ultramafic rocks provides molecular hydrogen (H2) that can support lithotrophic metabolism of microorganisms, but also poses extremely challenging conditions, including hyperalkalinity and limited electron acceptor availability. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f04f8050604e86e0189932219b84c7f
https://doi.org/10.1038/s41396-022-01197-9
https://doi.org/10.1038/s41396-022-01197-9
Autor:
Yuki Morono, Jessie R. Wishart, Motoo Ito, Akira Ijiri, Tatsuhiko Hoshino, Marta Torres, Circe Verba, Takeshi Terada, Fumio Inagaki, Frederick S. Colwell
Publikováno v:
Frontiers in Microbiology, Vol 10 (2019)
Hydraulic fracturing is a prominent method of natural gas production that uses injected, high-pressure fluids to fracture low permeability, hydrocarbon rich strata such as shale. Upon completion of a well, the fluid returns to the surface (produced w
Externí odkaz:
https://doaj.org/article/926ff3aa10174bc0810453e72acf364d
Autor:
Akira Ijiri, Naotaka Tomioka, Shigeyuki Wakaki, Harue Masuda, Katsumi Shozugawa, Sunghan Kim, Boo-Keun Khim, Masafumi Murayama, Motoyuki Matsuo, Fumio Inagaki
Publikováno v:
Frontiers in Earth Science, Vol 6 (2018)
Widespread diagenesis of clay minerals occurs in deeply buried marine sediments under high-temperature and high-pressure conditions. For example, the smectite-to-illite (S-I) transformation has been often observed in sediments at in situ temperatures
Externí odkaz:
https://doaj.org/article/c783bded4eb74146acecccdf708c216e