Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Yuka Hirahara"'
Autor:
Xiao‐Jun Wang, Li‐Hui Chen, Takeshi Hanyu, Jin‐Hua Shi, Yuan Zhong, Hiroshi Kawabata, Takashi Miyazaki, Yuka Hirahara, Toshiro Takahashi, Ryoko Senda, Qing Chang, Bogdan S. Vaglarov, Jun‐Ichi Kimura
Publikováno v:
Journal of Geophysical Research: Solid Earth. 126
Autor:
Takashi Miyazaki, Hikaru Iwamori, Qing Chang, Toshiro Takahashi, Jun-Ichi Kimura, Bogdan Stefanov Vaglarov, Tomoyuki Shibata, Hitomi Nakamura, Yuka Hirahara, Mitsuhiro Nakagawa
Publikováno v:
Gondwana Research. 70:36-49
Although slab-derived fluid significantly affects melt generation and dynamics within subduction zones, its amount and distribution are not sufficiently constrained at present. Herein, we use isotopic systematics of arc volcanic rocks, subducting mat
Autor:
Takeshi Hanyu, Toshiro Takahashi, Xiao-Jun Wang, Hiroshi Kawabata, Jun-Ichi Kimura, Albrecht W. Hofmann, Qing Chang, Yuan Zhong, Bogdan Stefanov Vaglarov, Takashi Miyazaki, Lie-Wen Xie, Jin Hua Shi, Li-Hui Chen, Yuka Hirahara, Ryoko Senda
Publikováno v:
Proceedings of the National Academy of Sciences. 115:8682-8687
The extreme Sr, Nd, Hf, and Pb isotopic compositions found in Pitcairn Island basalts have been labeled enriched mantle 1 (EM1), characterizing them as one of the isotopic mantle end members. The EM1 origin has been vigorously debated for over 25 yea
Autor:
Jun-Ichi Kimura, Ryoko Senda, Bogdan Stefanov Vaglarov, Yuka Hirahara, Hiroshi Kawabata, Takeshi Hanyu, Tomoki Sato, Qing Chang, Toshiro Takahashi, Takashi Miyazaki
Publikováno v:
Chemical Geology. 482:18-31
We investigated the Sr–Nd–Hf–Pb isotope compositions of clinopyroxene separates and strongly leached bulk rock powders from the basalt lavas on Raivavae Island in the South Pacific. These data allowed us to explore the magma chamber processes o
Autor:
Jun-Ichi Kimura, Osamu Ishizuka, Toshiyuki Fujii, Maria Luisa G. Tejada, Bogdan Stefanov Vaglarov, Kenji Shimizu, Qing Chang, Takashi Miyazaki, Kosuke T. Goto, Ryoko Senda, Takeshi Hanyu, Akira Ishikawa, Yuka Hirahara
Publikováno v:
Lithos. :87-96
Many seamounts on the Ontong Java Plateau (OJP) occur near the Stewart Arch, a topographic high that extends parallel to the North Solomon Trench along the southern margins of the plateau. Despite the thick sediment cover, several volcanic cones with
Autor:
Jun-Ichi Kimura, Toshiro Takahashi, Takashi Miyazaki, Folkmar Hauff, Teruaki Ishii, Ryoko Senda, Qing Chang, Takeyoshi Yoshida, Hiroshi Kawabata, Yuka Hirahara, Shiki Machida, Sakae Sano, Naoto Hirano, Yasutaka Hayasaka, Osamu Ishizuka, Bogdan Stefanov Vaglarov, Gen Shimoda, Kenichiro Tani
Publikováno v:
Geochemistry, Geophysics, Geosystems. 16:3309-3332
The source mantle of the basaltic ocean crust on the western half of the Pacific Plate was examined using Pb–Nd–Hf isotopes. The results showed that the subducted Izanagi–Pacific Ridge (IPR) formed from both Pacific (180–∼80 Ma) and Indian
Autor:
Alexander R. L. Nichols, Osamu Ishizuka, H. Shukuno, Kenichiro Tani, Daniel J. Dunkley, Yuka Hirahara, Yoshiyuki Tatsumi, Qing Chang, Makoto Arima
Publikováno v:
Earth and Planetary Science Letters. 424:84-94
A widely held hypothesis is that modern continental crust of an intermediate (i.e. andesitic) bulk composition forms at intra-oceanic arcs through subduction zone magmatism. However, there is a critical paradox in this hypothesis: to date, the domina
Autor:
Shuichi Kodaira, Hiroshi Kawabata, Toshiro Takahashi, Qing Chang, Bogdan Stefanov Vaglarov, Jun-Ichi Kimura, Takashi Miyazaki, Ryoko Senda, Takeshi Sato, Yuka Hirahara
Publikováno v:
Geochemistry, Geophysics, Geosystems. 16:1324-1347
The Yamato Basin in the Japan Sea is a back-arc basin characterized by basaltic oceanic crust that is twice as thick as typical oceanic crust. Two types of ocean floor basalts, formed during the opening of the Japan Sea in the Middle Miocene, were re
Autor:
Qing Chang, Toshiro Takahashi, Jun-Ichi Kimura, Takeyoshi Yoshida, Takashi Miyazaki, Shin-ichi Kagashima, Yuka Hirahara, Stefanov Vaglarov Bogdan, Ryoko Senda, Nobutaka Tsuchiya
Publikováno v:
Japanese Magazine of Mineralogical and Petrological Sciences. 44:91-111
Autor:
Takeshi Murase, Ryoko Senda, Koji Watanabe, Yuka Hirahara, Rikako Nohara-Imanaka, Shin ichi Kagashima
Publikováno v:
Japanese Magazine of Mineralogical and Petrological Sciences. 44:189-204