Timing and trigger of arc volcanism controlled by fluid flushing from subducting slab
スポンサーリンク
概要
- 論文の詳細を見る
We present 238U-230Th-226Ra systematics in lavas from Miyakejima volcano, Izu arc, Japan, together with major element, trace element and Sr-Nd-Pb isotopic compositions, to estimate the timescale of magmatic processes beneath an island arc. 238U-230Th-226Ra disequilibria observed in Miyakejima lavas with large excesses of 238U and 226Ra to 230Th imply metasomatism of depleted mantle by fluid related processes. Our data reveal that fluid components released from the slab ascend rapidly through the mantle wedge (>50m/yr), and that individual stages of subaerial volcanism are induced by flushing of different fluid batches to the mantle wedge with a periodicity of 1-13kyr. This indicates that arc magmatism is controlled by pulsed release of fluid from the slab occurring on such a small timescale, which might be related to the occurrence of earthquakes in the subducting slab.
- 日本学士院の論文
著者
-
Yokoyama Tetsuya
The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Study of the Ear
-
Kuritani Takeshi
The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Study of the Ear
-
Nakamura E
The Pheasant Memorial Laboratory For Geochemistry And Cosmochemistry (pml) Institute For Study Of Th
-
Kobayashi Katsura
The Pheasant Memorial Laboratory For Geochemistry And Cosmochemistry Institute For Study Of The Eart
-
Nakamura Eizo
The Pheasant Memorial Lab. For Geochemistry And Cosmochemistry (pml) Inst. For Study Of The Earth&ap
-
Yokoyama Tetsuya
The Pheasant Memorial Laboratory For Geochemistry And Cosmochemistry Institute For Study Of The Eart
-
KOBAYASHI Katsura
The Pheasant Memorial Laboratory (PML) for Geochemistry and Cosmochemistry, Institute for Study of the Earth's Interior, Okayama University
-
YOKOYAMA Tetsuya
The Pheasant Memorial Laboratory (PML) for Geochemistry and Cosmochemistry, Institute for Study of the Earth's Interior, Okayama University
-
KURITANI Takeshi
The Pheasant Memorial Laboratory (PML) for Geochemistry and Cosmochemistry, Institute for Study of the Earth's Interior, Okayama University
関連論文
- Precise Elemental and Isotopic Analyses in Silicate Samples Employing ICP-MS : Application of Hydrofluoric Acid Solution and Analytical Techniques
- Metamorphic history and tectonic evolution of the Himalayan UHP eclogites in Kaghan valley, Pakistan
- New preconcentration technique of Zr, Nb, Mo, Hf, Ta and W employing coprecipitation with Ti compounds : Its application to Lu-Hf system and sequential Pb-Sr-Nd-Sm separation
- Constraints on HIMU and EM by Sr and Nd isotopes re-examined
- Comprehensive geochemical analyses of small amounts (&1t; 100 mg) of extraterrestrial samples for the analytical competition related to the sample return mission MUSES-C
- Formation and suppression of AlF3 during HF digestion of rock samples in Teflon bomb for precise trace element analyses by ICP-MS and ID-TIMS
- Comprehensive analysis for major, minor and trace element contents and Sr-Nd-Pb-Hf isotope ratios in sediment reference materials, JSd-1 and MAG-1
- New sequential separation procedure for Sr, Nd and Pb isotope ratio measurement in geological material using MC-ICP-MS and TIMS
- Accumulation of radium in ferruginous protein bodies formed in lung tissue: association of resulting radiation hotspots with malignant mesothelioma and other malignancies
- Timing and trigger of arc volcanism controlled by fluid flushing from subducting slab
- Sr, Nd and Pb Isotope Systematics of Akagi Volcano, Northeast Japan : Implications for Interaction between Island Arc Magma and Lower Crust
- U-Pb isotope systematics of micro-zircon inclusions : Implications for the age and origin of eclogite xenolith from the Colorado Plateau
- Experimental Study of the Slab-mantle Interaction and Implications for the Formation of Titanoclinohumite at Deep Subduction Zone.