Identifying volatile mantle trend with the water–fluorine–cerium systematics of basaltic glass

Kenji Shimizu, Motoo Ito, Qing Chang, Takashi Miyazaki, Kenta Ueki, Chiaki Toyama, Ryoko Senda, Bogdan S. Vaglarov, Tsuyoshi Ishikawa, Jun Ichi Kimura

研究成果: ジャーナルへの寄稿記事

抄録

The lithophile elements and isotopic compositions of oceanic basalts suggest they derive from different mantle components. We present new analytical results of un-degassed deep-marine basaltic glasses from various regions, and we find strong linear correlations of R2 ≥ 0.997 between H2O and F as well as H2O and Ce, for which we propose mantle trends. The mantle trends represent global variations of mantle components, ranging from a depleted dry peridotite of mid-ocean ridge basalt (MORB) (DMM, depleted MORB source mantle: H2O = 100 ppm; H2O/Ce = 200; H2O/F = 10) to a hydrous peridotite of Hawaiian ocean island basalt (OIB) of deep mantle origin (FOZO, focal zone: H2O = 750 ppm; H2O/Ce = 200; H2O/F = 18.5). Accordingly, we defined the correlation as a volatile DMM–FOZO trend. Based on our findings, we report novel H2O–F–Ce systematics to discriminate the degree of water depletion in the source mantle and the rehydration of the mantle with recycled surface water through oceanic plate subduction. Using this method, most OIBs are distinguished clearly from the DMM–FOZO trend, and we find that the water in their sources originates from recycled water derived from the hydrated oceanic crust and sediment after various degrees of dehydration (75–95%) in subduction zones.

元の言語英語
ページ(範囲)283-294
ページ数12
ジャーナルChemical Geology
522
DOI
出版物ステータス出版済み - 9 20 2019

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glass
mantle
Glass
Water
ocean island basalt
mid-ocean ridge basalt
mantle source
peridotite
Dehydration
Surface waters
rehydration
Sediments
dehydration
water
oceanic crust
subduction zone
trend
basalt
isotopic composition
subduction

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

これを引用

Shimizu, K., Ito, M., Chang, Q., Miyazaki, T., Ueki, K., Toyama, C., ... Kimura, J. I. (2019). Identifying volatile mantle trend with the water–fluorine–cerium systematics of basaltic glass. Chemical Geology, 522, 283-294. https://doi.org/10.1016/j.chemgeo.2019.06.014

Identifying volatile mantle trend with the water–fluorine–cerium systematics of basaltic glass. / Shimizu, Kenji; Ito, Motoo; Chang, Qing; Miyazaki, Takashi; Ueki, Kenta; Toyama, Chiaki; Senda, Ryoko; Vaglarov, Bogdan S.; Ishikawa, Tsuyoshi; Kimura, Jun Ichi.

:: Chemical Geology, 巻 522, 20.09.2019, p. 283-294.

研究成果: ジャーナルへの寄稿記事

Shimizu, K, Ito, M, Chang, Q, Miyazaki, T, Ueki, K, Toyama, C, Senda, R, Vaglarov, BS, Ishikawa, T & Kimura, JI 2019, 'Identifying volatile mantle trend with the water–fluorine–cerium systematics of basaltic glass', Chemical Geology, 巻. 522, pp. 283-294. https://doi.org/10.1016/j.chemgeo.2019.06.014
Shimizu, Kenji ; Ito, Motoo ; Chang, Qing ; Miyazaki, Takashi ; Ueki, Kenta ; Toyama, Chiaki ; Senda, Ryoko ; Vaglarov, Bogdan S. ; Ishikawa, Tsuyoshi ; Kimura, Jun Ichi. / Identifying volatile mantle trend with the water–fluorine–cerium systematics of basaltic glass. :: Chemical Geology. 2019 ; 巻 522. pp. 283-294.
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