Výsledky vyhledávání - "Shigeru Iizumi"

Some Notes on the Lugiin Gol, Mushgai Khudag and Bayan Khoshuu Alkaline Complexes, Southern Mongolia

Autor: Jindrich Kynicky, Munkhtsengel Baatar, Shigeru Iizumi, Gerel Ochir, Piero Comin-Chiaramonti

Publikováno v: International Journal of Geosciences. :1200-1214

Volcanic-plutonic alkaline complexes from Lugiin Gol, Mushgai Khudag and Bayan Khoshuu, southern Mongolia (244, 139 and 131 Ma, respectively) occur within grabens in E-W lineaments. They are represented by syenitic rock-types (silica undersaturated t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a02d0e406fbd84ad42c9ef76aa562254
https://doi.org/10.4236/ijg.2013.48114

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K–Ar age and geochemistry of the SW Japan Paleogene cauldron cluster: Implications for Eocene–Oligocene thermo-tectonic reactivation

Autor: Tetsumaru Itaya, Hiroo Kagami, Teruyoshi Imaoka, M. Takemoto, Kazuo Kiminami, K. Nishida, Shigeru Iizumi, Toshiyuki Ikawa

Publikováno v: Journal of Asian Earth Sciences. 40:509-533

Systematic K–Ar dating and geochemical analyses of Paleogene cauldrons in the Sanin Belt of SW Japan have been made to explore the relationship between the timing of their formation and the Paleogene subduction history of SW Japan documented in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8bcb60f2ce1ee5a83379081168a9a695
https://doi.org/10.1016/j.jseaes.2010.10.002

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Geology and geochemistry of lavas at Nekoma volcano: Implications for origin of Quaternary low-K andesite in the north-eastern Honshu arc, Japan

Autor: Tomoyuki Tanji, Shigeru Iizumi, Takeyoshi Yoshida, Jun-Ichi Kimura

Publikováno v: Island Arc. 10:116-134

Nekoma volcano forms part of the arc axis volcanic array of the North-eastern Honshu arc, Japan, which is commonly characterized by medium-K lava suites. However, Nekoma is exceptional because many of its lavas are low-K. This anomaly has been a matt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9a3fcb38ca0962d0b0c9afbbbd4d4d8b
https://doi.org/10.1111/j.1440-1738.2001.00313.x

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PLAGIOCLASE-QUARTZ ROCKS OF METASOMATIC ORIGIN AT THE EXPENSE OF GRANITIC ROCKS OF THE KOMAKI DISTRICT, SOUTHWESTERN JAPAN

Autor: Tetsuichi Takagi, Shigeru Iizumi, Lorence G. Collins, Kazuki Naito

Publikováno v: The Canadian Mineralogist. 45:559-580

In the Komaki district of southwestern Japan, small bodies composed mostly of intermediate plagioclase and quartz occur in a Late Cretaceous granitic batholith. The properties of the plagioclase–quartz rock indicate that the rocks were formed by ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e08d03b596544653be2b16afdae9e74
https://doi.org/10.2113/gscanmin.45.3.559

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Fission-track ages and Sr isotope ratios of tuffs in the Paleogene Ube Group, SW Japan

Autor: Hideo Matsusato, Hideki Iwano, Teruyoshi Imaoka, Takamasa Matsumoto, Shigeru Iizumi, Seiji Matsuo

Publikováno v: The Journal of the Geological Society of Japan. 109:106-115

山口県小野田市千崎において小野田インターチェンジ建設工事中に数枚の凝灰岩と砕屑岩類からなる宇部層群宇部夾炭層上部層の大露頭が出現した.本研究ではその凝灰岩の産状,岩石記�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44835eeb95b44bd70e3203bc5868eb10
https://doi.org/10.5575/geosoc.109.106

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Petrochemical and Sr-Nd isotope investigations of Cretaceous intrusive rocks and their enclaves in the Togouchi-Yoshiwa district, northwest Hiroshima prefecture, SW Japan

Autor: J. U. N. Ishioka, Shigeru Iizumi

Publikováno v: GEOCHEMICAL JOURNAL. 37:449-470

Petrographic, petrochemical and Sr-Nd isotopic data are presented for granitoids and microdioritic enclaves from two Cretaceous stocks (Togouchi granodiorite and Tateiwayama granite porphyry) from the Togouchi-Yoshiwa district, northwest Hiroshima pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::08db29fd4b4822530419b5e86e0d2e1c
https://doi.org/10.2343/geochemj.37.449

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Geology and geochemistry of lavas at Nekoma volcano: Implications for origin of Quaternary low-K andesite in the north-eastern Honshu arc, Japan

Autor: Jun-Ichi Kimura, Tomoyuki Tanji, Takeyoshi Yoshida, Shigeru Iizumi

Publikováno v: The Island Arc. 10:116-134

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::721751b6b3f4ac0b36ac15ffb240195a
https://doi.org/10.1046/j.1440-1738.2001.00313.x

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Mantle sources and magma–crust interactions in volcanic rocks from the northern Kenya rift: geochemical evidence

Autor: Toshiyuki Wakatsuki, Yoshihiro Sawada, Shigeru Iizumi, Kurkura Kabeto

Publikováno v: Lithos. 56:111-139

Miocene to Quaternary mafic (SiO2 54 wt.%) lavas from Samburu Hills, northern Kenya rift, exhibit significant variations in major and trace element compositions, and Sr–Nd isotopic ratios. Bimodal lavas were erupted in the early and middle Miocene

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a253e90faf88426d2108de57aef97ff
https://doi.org/10.1016/s0024-4937(00)00063-3

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Sr–Nd isotope ratios of gabbroic and dioritic rocks in a Cretaceous‐Paleogene granite terrain, Southwest Japan

Autor: Teruyoshi Imaoka, Shigeru Iizumi, Hiroo Kagami

Publikováno v: Island Arc. 9:113-127

Whole-rock chemical and Sr and Nd isotope data are presented for gabbroic and dioritic rocks from a Cretaceous-Paleogene granitic terrain in Southwest Japan. Age data indicate that they were emplaced in the late Cretaceous during the early stages of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a38e496d809c1e0a7eaeba824e10937b
https://doi.org/10.1046/j.1440-1738.2000.00265.x

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