Picrites in central Hokkaido

Evidence of extremely high temperature magmatism in the late jurassic ocean recorded in an accreted oceanic plateau

Yuji Ichiyama, Akira Ishiwatari, Jun Ichi Kimura, Ryoko Senda, Hiroshi Kawabata, And Yoshiyuki Tatsumi

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

The Sorachi-Yezo belt, central Hokkaido, Japan, is composed of voluminous tholeiitic basaltic volcanics, and has been thought to be accreted fragments of an oceanic plateau formed in the Late Jurassic Pacific Ocean. Picrites have been reported as pillow lava and hyaloclastite from the Sorachi-Yezo belt. These picrites are characterized by very magnesian olivine phenocrysts (up to Fo [=100* Mg/ (Mg+Fe)] = 94.1), which indicate that the primary magma was unusually Mg rich. The estimated MgO of the primary magma and the mantle potential temperature are as high as 29 wt% and 1700 °C, respectively, comparable to those of the Neoarchean komatiites, and higher than those of the Gorgona komatiites and picrites. The rare earth element patterns of the Sorachi-Yezo picrites are divided into two groups that are chemically akin to the Neoarchean komatiites and Gorgona komatiites and picrites, indicating different melting regimes in an extremely hot mantle plume. The Sorachi-Yezo picrites provide evidence for extremely high temperature magmatism, like that of Archean komatiite, caused by melting of the hottest mantle plume among the Phanerozoic oceanic large igneous provinces.

元の言語英語
ページ(範囲)411-414
ページ数4
ジャーナルGeology
40
発行部数5
DOI
出版物ステータス出版済み - 5 1 2012
外部発表Yes

Fingerprint

picrite
magmatism
Jurassic
plateau
ocean
mantle plume
melting
magma
hyaloclastite
pillow lava
komatiite
large igneous province
potential temperature
Phanerozoic
Archean
olivine
rare earth element
mantle

All Science Journal Classification (ASJC) codes

  • Geology

これを引用

Picrites in central Hokkaido : Evidence of extremely high temperature magmatism in the late jurassic ocean recorded in an accreted oceanic plateau. / Ichiyama, Yuji; Ishiwatari, Akira; Kimura, Jun Ichi; Senda, Ryoko; Kawabata, Hiroshi; Tatsumi, And Yoshiyuki.

:: Geology, 巻 40, 番号 5, 01.05.2012, p. 411-414.

研究成果: ジャーナルへの寄稿記事

Ichiyama, Yuji ; Ishiwatari, Akira ; Kimura, Jun Ichi ; Senda, Ryoko ; Kawabata, Hiroshi ; Tatsumi, And Yoshiyuki. / Picrites in central Hokkaido : Evidence of extremely high temperature magmatism in the late jurassic ocean recorded in an accreted oceanic plateau. :: Geology. 2012 ; 巻 40, 番号 5. pp. 411-414.
@article{23b991c3bba84694bbc650bc8070d34f,
title = "Picrites in central Hokkaido: Evidence of extremely high temperature magmatism in the late jurassic ocean recorded in an accreted oceanic plateau",
abstract = "The Sorachi-Yezo belt, central Hokkaido, Japan, is composed of voluminous tholeiitic basaltic volcanics, and has been thought to be accreted fragments of an oceanic plateau formed in the Late Jurassic Pacific Ocean. Picrites have been reported as pillow lava and hyaloclastite from the Sorachi-Yezo belt. These picrites are characterized by very magnesian olivine phenocrysts (up to Fo [=100* Mg/ (Mg+Fe)] = 94.1), which indicate that the primary magma was unusually Mg rich. The estimated MgO of the primary magma and the mantle potential temperature are as high as 29 wt{\%} and 1700 °C, respectively, comparable to those of the Neoarchean komatiites, and higher than those of the Gorgona komatiites and picrites. The rare earth element patterns of the Sorachi-Yezo picrites are divided into two groups that are chemically akin to the Neoarchean komatiites and Gorgona komatiites and picrites, indicating different melting regimes in an extremely hot mantle plume. The Sorachi-Yezo picrites provide evidence for extremely high temperature magmatism, like that of Archean komatiite, caused by melting of the hottest mantle plume among the Phanerozoic oceanic large igneous provinces.",
author = "Yuji Ichiyama and Akira Ishiwatari and Kimura, {Jun Ichi} and Ryoko Senda and Hiroshi Kawabata and Tatsumi, {And Yoshiyuki}",
year = "2012",
month = "5",
day = "1",
doi = "10.1130/G32752.1",
language = "English",
volume = "40",
pages = "411--414",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "5",

}

TY - JOUR

T1 - Picrites in central Hokkaido

T2 - Evidence of extremely high temperature magmatism in the late jurassic ocean recorded in an accreted oceanic plateau

AU - Ichiyama, Yuji

AU - Ishiwatari, Akira

AU - Kimura, Jun Ichi

AU - Senda, Ryoko

AU - Kawabata, Hiroshi

AU - Tatsumi, And Yoshiyuki

PY - 2012/5/1

Y1 - 2012/5/1

N2 - The Sorachi-Yezo belt, central Hokkaido, Japan, is composed of voluminous tholeiitic basaltic volcanics, and has been thought to be accreted fragments of an oceanic plateau formed in the Late Jurassic Pacific Ocean. Picrites have been reported as pillow lava and hyaloclastite from the Sorachi-Yezo belt. These picrites are characterized by very magnesian olivine phenocrysts (up to Fo [=100* Mg/ (Mg+Fe)] = 94.1), which indicate that the primary magma was unusually Mg rich. The estimated MgO of the primary magma and the mantle potential temperature are as high as 29 wt% and 1700 °C, respectively, comparable to those of the Neoarchean komatiites, and higher than those of the Gorgona komatiites and picrites. The rare earth element patterns of the Sorachi-Yezo picrites are divided into two groups that are chemically akin to the Neoarchean komatiites and Gorgona komatiites and picrites, indicating different melting regimes in an extremely hot mantle plume. The Sorachi-Yezo picrites provide evidence for extremely high temperature magmatism, like that of Archean komatiite, caused by melting of the hottest mantle plume among the Phanerozoic oceanic large igneous provinces.

AB - The Sorachi-Yezo belt, central Hokkaido, Japan, is composed of voluminous tholeiitic basaltic volcanics, and has been thought to be accreted fragments of an oceanic plateau formed in the Late Jurassic Pacific Ocean. Picrites have been reported as pillow lava and hyaloclastite from the Sorachi-Yezo belt. These picrites are characterized by very magnesian olivine phenocrysts (up to Fo [=100* Mg/ (Mg+Fe)] = 94.1), which indicate that the primary magma was unusually Mg rich. The estimated MgO of the primary magma and the mantle potential temperature are as high as 29 wt% and 1700 °C, respectively, comparable to those of the Neoarchean komatiites, and higher than those of the Gorgona komatiites and picrites. The rare earth element patterns of the Sorachi-Yezo picrites are divided into two groups that are chemically akin to the Neoarchean komatiites and Gorgona komatiites and picrites, indicating different melting regimes in an extremely hot mantle plume. The Sorachi-Yezo picrites provide evidence for extremely high temperature magmatism, like that of Archean komatiite, caused by melting of the hottest mantle plume among the Phanerozoic oceanic large igneous provinces.

UR - http://www.scopus.com/inward/record.url?scp=84861405714&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861405714&partnerID=8YFLogxK

U2 - 10.1130/G32752.1

DO - 10.1130/G32752.1

M3 - Article

VL - 40

SP - 411

EP - 414

JO - Geology

JF - Geology

SN - 0091-7613

IS - 5

ER -