Zobrazeno 1 - 10
of 454
pro vyhledávání: '"OSAMU ISHIZUKA"'
Autor:
Xiaohui Li, Osamu Ishizuka, Robert J. Stern, Sanzhong Li, Zhiqing Lai, Ian Somerville, Yanhui Suo, Long Chen, Hongxia Yu
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-11 (2024)
Abstract Compositions of island arc and back-arc basin basalts are often used to trace the recycling of subducted materials. However, the contribution of subducted components to the mantle source during initial arc rifting before back-arc basin sprea
Externí odkaz:
https://doaj.org/article/dc602777334b40f9b3a31556b5226c13
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-14 (2024)
Abstract High-resolution dating of volcanic rocks is the foundation for understanding the evolution of volcanoes and for estimating possible hazards. However, dating is often difficult for submarine volcanoes, where radiocarbon or other dating is fre
Externí odkaz:
https://doaj.org/article/6792830576894737868abd7f273a03bd
Autor:
Osamu Ishizuka, Kenichiro Tani, Rex N. Taylor, Susumu Umino, Izumi Sakamoto, Yuka Yokoyama, Itaru Ogitsu, Gen Shimoda, Yumiko Harigane, Taichi Sato, Yasuhiko Ohara, Christopher Conway, Americus Perez, Masakazu Fujii, Yuki Kusano, Masatoshi Yagi, Yoshihiko Tamura
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 25, Iss 5, Pp n/a-n/a (2024)
Abstract Understanding the age and dynamics of the overriding plates allows an assessment of competing subduction initiation hypotheses. The Izu‐Bonin‐Mariana margin in the Western Pacific is a key example of initiation and hence it is important
Externí odkaz:
https://doaj.org/article/5509cb2f92164258a33e09ba6869a068
Autor:
Kyoko Okino, Kenichiro Tani, Masakazu Fujii, Fei Zhou, Osamu Ishizuka, Yasuhiko Ohara, Tomoko Hanyu, Yuki Matamura
Publikováno v:
Progress in Earth and Planetary Science, Vol 10, Iss 1, Pp 1-22 (2023)
Abstract Detachment faulting is one of the main styles of seafloor spreading at slow to intermediate mid-ocean ridges. However, we have limited insight into its role in back-arc basin formation. We surveyed a remnant back-arc spreading center in the
Externí odkaz:
https://doaj.org/article/0c672e771a254332aeb7ed4eb843e31a
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-39 (2023)
Abstract The eruption activity of Shinmoedake in the Kirishima volcanic group of Japan resumed in 2017–18, following a quiet period during 2011–17. Subplinian eruptions preceded lava effusion in 2011; however, no subplinian eruption occurred duri
Externí odkaz:
https://doaj.org/article/e18b2471475d48b1a1f825b0ee3e714f
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-14 (2023)
Abstract During the middle Miocene, forearc alkaline magmatism occurred in the Outer Zone of Southwest Japan and the northern Ryukyu Arc, resulting in the formation of forearc alkaline basaltic rocks with ocean island basalt (OIB)-like chemical signa
Externí odkaz:
https://doaj.org/article/ece6f8c486854ecbb67802724548bcef
Autor:
Yoshihiko Tamura, Tomoki Sato, Osamu Ishizuka, Iona M. McIntosh, Kenta Yoshida, Fukashi Maeno, Qing Chang
Publikováno v:
Frontiers in Earth Science, Vol 11 (2023)
Sudden changes of eruption styles and magma compositions at arc volcanoes are enigmatic processes. Nishinoshima volcano, western Pacific, has had historical eruptions in 1973–1974 and from 2013 on and off to the present day. These eruptions were ch
Externí odkaz:
https://doaj.org/article/478ea8b26b654237ad71fd4240f3b097
Autor:
Takuya Takasawa, Tomonori Minagawa, Takahisa Domen, Toshirou Fukushima, Yu Fujii, Mai Iwaya, Tomonobu Koizumi, Teruyuki Ogawa, Osamu Ishizuka
Publikováno v:
IJU Case Reports, Vol 5, Iss 3, Pp 179-182 (2022)
Introduction Germ cell tumor with malignant transformation is extremely rare. We present a case of testicular primitive neuroectodermal tumor with multiple metastases that was effectively managed by surgery, irradiation, and second‐line chemotherap
Externí odkaz:
https://doaj.org/article/38d42737e2cc41ee90a6fa5940571bea
Autor:
Takashi Sano, Kenichiro Tani, Shigekazu Yoneda, Hla Min, Thaung Htike, Zin Maung Maung Thein, Osamu Ishizuka, Nao Kusuhashi, Reiko T. Kono, Masanaru Takai, Chris E. Conway
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)
Abstract We present a model for the petrogenesis of magma with adakitic affinity in an old subduction zone, which does not involve slab melting and is constrained by new geochronological and geochemical data for Mt. Popa, the largest of three Quatern
Externí odkaz:
https://doaj.org/article/dee7bf2e46bc46a194a23581a004a8e8
Autor:
Yutaka Yoshimura, Osamu Ishizuka, Toshitsugu Yamazaki, Hyeon‐Seon Ahn, Tesfaye Kidane, Yuhji Yamamoto, Shun Sekimoto, Takashi Sano, Yo‐ichiro Otofuji
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 8, Pp n/a-n/a (2023)
Abstract The Ethiopia‐Yemen flood basalts are spatially zoned with progressively lower TiO2 lavas from near the Afar depression toward the margins. The timing and rate of emplacement of low TiO2 (LT) lavas are poorly known compared with the ultra
Externí odkaz:
https://doaj.org/article/4e8da94038ba404e8f4be77df69ed1e5