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論文 - 山下　茂

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Experimental petrology of basement lavas from Ocean Drilling Program Leg 192: implications for differentiation processes in Ontong Java Plateau magmas 査読

Takashi Sano, Shigeru Yamashita

Geological Society, London, Special Publications 229 ( 1 ) 185 - 218 2004年

Mid infrared throughput with 5 um aperture for H2O determination of an andesitic glass: Comparison of synchrotron radiation source at SPring-8 with conventional light sources. 査読

Tatsuhiko Kawamoto, Hiroyuki Kagi, Shigeru Yamashita, Tomoko Handa, Kyoko Matsukage, Yuka Ikemoto, Taro Moriwaki, Hiroaki Kimura

GEOCHEMICAL JOURNAL 37 ( 2 ) 253 - 259 2003年

Experimental Study of the Effect of Temperature on Water Solubility in Natural Rhyolite Melt to 100 MPa 査読

S. Yamashita

Journal of Petrology 40 ( 10 ) 1497 - 1507 1999年10月

厚さ100um以下の赤外分光用薄片の製作法査読

大胡佳恵, 山下茂

火山 44 ( 5 ) 251 - 254 1999年

Infrared spectroscopy of hydrous glasses of arc magma compositions. 査読

Shigeru Yamashita, Toshihiro Kitamura, Minoru Kusakabe

GEOCHEMICAL JOURNAL 31 ( 3 ) 169 - 174 1997年

Temporal variation in primary magma compositions in the northeast Japan Arc 査読

Shigeru Yamashita, Yoshiyljki Tatsumi, Susumu Nohda

The Island Arc 5 ( 3 ) 276 - 288 1996年9月

Thermal and geochemical evolution of the mantle wedge in the northeast Japan arc: 2. Contribution from geochemistry 査読

Shigeru Yamashita, Yoshiyuki Tatsumi

Journal of Geophysical Research: Solid Earth 99 ( B11 ) 22285 - 22293 1994年11月

Thermal and geochemical evolution of the mantle wedge in the northeast Japan arc: 1. Contribution from experimental petrology 査読

Yoshiyuki Tatsumi, Yoshitsugu Furukawa, Shigeru Yamashita

Journal of Geophysical Research: Solid Earth 99 ( B11 ) 22275 - 22283 1994年11月

Experimental petrology of basement basaltic rocks from ODP Leg127/128 Sites 794 and 797, Japan Sea 査読

Yamashita, S, Fujii, T

Proceedings of the Ocean Drilling Program, Scientific Results 127/128 ( Pt.2 ) 891 - 898 1992年

40Ar-39Ar analyses of volcanic rocks recovered from the Japan Sea floor by Leg127/128: constraint on the formation age of the Japan Sea 査読

Kaneoka, I, Takigami, Y, Takaoka, N, Yamashita, S, Tamaki, K

Proceedings of the Ocean Drilling Program, Scientific Results 127/128 ( Pt.2 ) 819 - 836 1992年

Geochemistry of Leg127 basalts: implication for the evolutionary history of the Japan Sea backarc basin 査読

Nohda, S, Tatsumi, Y, Yamashita, S, Fujii, T

Proceedings of the Ocean Drilling Program, Scientific Results 127/128 ( Pt.2 ) 899 - 904 1992年

Origin of felsic magmas at Meiyo-Daini seamount in Yamato backarc basin, Japan Sea 査読

山下茂

火山 36 ( 4 ) 431 - 441 1991年

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：特定非営利活動法人日本火山学会

Detailed petrological study was made on the felsic volcanic rocks dredged from the Meiyo-Daini seamount in the Yamato backarc basin, Japan Sea. The Meiyo-Daini seamount was created as a subaqueous volcanic edifice together with the other seamounts in the basin at the latest stage of backarc rifting. The issued felsic volcanic rocks contain mafic inclusions with varying sizes and textures. Mass balance calculation suggests that the host felsic magmas were differentiated from the mafic parent by fractionation of amphibole and plagioclase feldspar. On the other hand, the derivative felsic magmas have phenocryst assemblages which are different from that expected from the fractional crystallization model. These puzzling phenocryst assemblages are probable reflection of the following magma plumbing system; the felsic magmas were produced in deep-seated magma reservoir(s) (>2 kbar;>ca. 7 km below surface), and then ascent to crystallize the present phenocryst assemblages consuming the crystals relevant to the differentiation. The mafic inclusions could be less differentiated portion of the deep-seated magma reservoir(s). The inferred magma plumbing system is consistent with the fact that the Yamato backarc basin is underlain by anomalously deep seismic Moho.

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