Search Results - "Kogiso, Tetsu"

Electrical conductivity of the oceanic asthenosphere and its interpretation based on laboratory measurements by Katsura, Tomoo, Baba, Kiyoshi, Yoshino, Takashi, Kogiso, Tetsu

“…We review the currently available results of laboratory experiments, geochemistry and MT observations and attempt to explain the conductivity structures in the…”
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Partial melting experiments of bimineralic eclogite and the role of recycled mafic oceanic crust in the genesis of ocean island basalts by Kogiso, Tetsu, Hirschmann, Marc M.

“…Bimineralic eclogite, which consists solely of garnet and clinopyroxene, is a likely component of some of the ancient recycled crust residing in basalt source…”
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A simple determination of whole-rock major- and trace-element composition for peridotite by micro-XRF spectrometer and ICP-MS using fused-glass bead by Akizawa, Norikatsu, Ishikawa, Akira, Kogiso, Tetsu

“…A simple analytical procedure for determination of whole-rock major- and trace-element composition by micro-X-ray fluorescence (μXRF) spectrometer and…”
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Petit-spot as definitive evidence for partial melting in the asthenosphere caused by CO2 by Machida, Shiki, Kogiso, Tetsu, Hirano, Naoto

“…The deep carbon cycle plays an important role on the chemical differentiation and physical properties of the Earth’s mantle. Especially in the asthenosphere,…”
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Changes in elements and magnetic properties of Sendai Bay sediments caused by the 2011 Tohoku‐oki tsunami by Abe, Hirokuni, Kawamura, Noriko, Ishikawa, Naoto, Kogiso, Tetsu

“…Nearshore marine sediments deposited along island arcs can preserve evidence of past disaster events, such as tsunamis. Evidence of a tsunami that occurred off…”
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Fine‐scale chemostratigraphy of cross‐sectioned hydrogenous ferromanganese nodules from the western North Pacific by Machida, Shiki, Nakamura, Kentaro, Kogiso, Tetsu, Shimomura, Ryo, Horinouchi, Koichi, Okino, Kyoko, Kato, Yasuhiro

“…A broad area densely covered by ferromanganese nodules was recently discovered around Minamitorishima (Marcus) Island, representing a high‐potential metal…”
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Pressure effect on cathodoluminescence emission intensity recorded in metamorphosed detrital zircons of the Sanbagawa schists by Tsuchiya, Yuta, Aoki, Kazumasa, Kogiso, Tetsu, Seo, Yoshiki, Aoki, Shogo, Nishido, Hirotsugu

“…The cathodoluminescence (CL) emission and spectra analyses were conducted on detrital zircons in the Cretaceous Sanbagawa schists to describe changes in CL…”
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High-pressure partial melting of garnet pyroxenite: possible mafic lithologies in the source of ocean island basalts by Kogiso, T, Hirschmann, M M, Frost, D J

“…Many ocean island basalts (OIB) that have isotopic ratios indicative of recycled crustal components in their source are silica-undersaturated and unlike…”
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Formation process of sub-micrometer-sized metasomatic platinum-group element-bearing sulfides in a Tahitian harzburgite xenolith by Akizawa, Norikatsu, Kogiso, Tetsu, Miyake, Akira, Tsuchiyama, Akira, Igami, Yohei, Uesugi, Masayuki

“…Base-metal sulfides (BMSs) are minerals that host platinum-group elements (PGE) in mantle peridotites and significantly control the bulk PGE content. They have…”
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Magma genesis beneath Northeast Japan arc: A new perspective on subduction zone magmatism by Kogiso, Tetsu, Omori, Soichi, Maruyama, Shigenori

“…It is being accepted that earthquakes in subducting slab are caused by dehydration reactions of hydrous minerals. In the context of this “dehydration…”
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Hydrothermal ferromanganese oxides around a petit-spot volcano on old and cold oceanic crust by Azami, Keishiro, Machida, Shiki, Hirano, Naoto, Nakamura, Kentaro, Yasukawa, Kazutaka, Kogiso, Tetsu, Nakanishi, Masao, Kato, Yasuhiro

“…Abstract Areas of old and cold oceanic plate lack conventional volcanism and have been assumed to be devoid of submarine hydrothermal activity. However,…”
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Crustal anorthosite formation by deep‐seated hydrothermal circulation beneath fast‐spreading axis: Constraints from chronological approach, Sr isotope, and fluid–chromite inclusion investigation by Akizawa, Norikatsu, Miyake, Akira, Igami, Yohei, Tsuchiyama, Akira, Asanuma, Hisashi, Kogiso, Tetsu, Wakaki, Shigeyuki, Ishikawa, Tsuyoshi, Arai, Shoji, Eom, Jiwon, Kawahata, Hodaka, Aze, Takahiro, Yokoyama, Yusuke

“…Hydrothermal circulation beneath the spreading axis plays a significant role in the exchange of energy and mass between the solid Earth and the oceans…”
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Basic properties of transition remanent magnetizations of magnetite in relation to the ambient field using granite samples by Sato, Masahiko, Seita, Kazuhiro, Miyagawa, Takeshi, Mochizuki, Nobutatsu, Kogiso, Tetsu, Tsunakawa, Hideo

“…We have investigated basic properties of transition remanent magnetization of natural magnetite in granite samples collected from the Minnesota River Valley,…”
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Intermittent Beginning to the Formation of Hydrogenous Ferromanganese Nodules in the Vast Field: Insights from Multi-Element Chemostratigraphy Using Microfocus X-ray Fluorescence by Shiki Machida, Ryo Shimomura, Kentaro Nakamura, Tetsu Kogiso, Yasuhiro Kato

“…Vast ferromanganese nodule fields have been found on the deep-sea floor of all oceans worldwide. They have received attention because they potentially provide…”
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Evidence for suboceanic small-scale convection from a “garnet”-bearing lherzolite xenolith from Aitutaki Island, Cook Islands by Akizawa, Norikatsu, Ozawa, Kazuhito, Kogiso, Tetsu, Ishikawa, Akira, Miyake, Akira, Igami, Yohei, Wallis, Simon R., Nagaya, Takayoshi, Ohshima, Chihiro, Fujita, Ryo, Kawamoto, Tatsuhiko, Tamura, Akihiro, Morishita, Tomoaki, Arai, Shoji, Yasumoto, Atsushi

“…Garnet peridotite xenoliths have been rarely reported from suboceanic mantle. Petrographic and geochemical characteristics of garnet-bearing oceanic peridotite…”
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Experimental study of clinopyroxenite partial melting and the origin of ultra-calcic melt inclusions by Kogiso, Tetsu, Hirschmann, Marc M.

“…Ultra-calcic melt inclusions (UCMI: CaO > 13.5 wt% and/or CaO/Al2O3 > 0.9) are magnesian and near-primary liquids trapped in volcanic phenocrysts from…”
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Trace element transport during dehydration processes in the subducted oceanic crust: 2. Origin of chemical and physical characteristics in arc magmatism by Tatsumi, Yoshikyuki, Kogiso, Tetsu

“…The trace elements and Sr-Nd-Pb isotope compositions of arc magmas have been calculated from our estimates of: (1) the chemical composition of aqueous fluids…”
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Major element composition of an Early Enriched Reservoir: constraints from 142Nd/144Nd isotope systematics in the early Earth and high-pressure melting experiments of a primitive peridotite by Kondo, Nozomi, Yoshino, Takashi, Matsukage, Kyoko N., Kogiso, Tetsu

“…The Accessible Silicate Earth (ASE) has a higher 142 Nd/ 144 Nd ratio than most chondrites. Thus, if the Earth is assumed to have formed from these chondrites,…”
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Lithium, strontium, and neodymium isotopic compositions of oceanic island basalts in the Polynesian region: constraints on a Polynesian HIMU origin by Nishio, Yoshiro, Nakai, Shun'ichi, Kogiso, Tetsu, Barsczus, Hans G.

“…To investigate the origin of the HIMU (high-μ) reservoir in the mantle, we measured Li, Sr, and Nd isotopic compositions of several oceanic island basalts…”
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Petit-spot as definitive evidence for partial melting in the asthenosphere caused by CO 2 by Machida, Shiki, Kogiso, Tetsu, Hirano, Naoto

“…The deep carbon cycle plays an important role on the chemical differentiation and physical properties of the Earth's mantle. Especially in the asthenosphere,…”
Get full text