九州西端部からの四万十高圧変成岩類の発見

KOUCHI Yoshikazu; ORIHASHI Yuji; OBARA Hokuto; MIYATA Kazunori; SHIMOJO Masanori; OTOH Shigeru; AOYAMA Masashi; AKAHORI Yoshimitsu; YANAI Shuichi

doi:10.5026/jgeography.120.30

九州西端部からの四万十高圧変成岩類の発見

KOUCHI Yoshikazu, ORIHASHI Yuji, OBARA Hokuto, MIYATA Kazunori, SHIMOJO Masanori, OTOH Shigeru, AOYAMA Masashi, AKAHORI Yoshimitsu, YANAI Shuichi

地球システム科学科

研究成果: ジャーナルへの寄稿 › 学術論文

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&emsp;206Pb/238U dating of detrital zircons by LA-ICP-MS clarified that the majority of high-P/T Nagasaki metamorphic rocks in western Kyushu contain Late Cretaceous igneous zircon of 89 ± 3 Ma (Turonian-Coniacian) and 86 ± 2 Ma (Coniacian-Santonian). These data indicate that Nagasaki metamorphic rocks are composed mainly of Upper Cretaceous Shimanto metamorphic rocks, i.e. high-P/T metamorphosed accretionary complex of the Cretaceous Shimanto belt. This find strongly supports the subhorizontal geotectonic structure of the Japanese Islands previously inferred from surface geological mapping and deep seismic images.

寄稿の翻訳タイトル	Discovery of Shimanto High-P/T Metamorphic Rocks from the Western Margin of Kyushu, Japan
本文言語	日本
ページ（範囲）	30-39
ページ数	10
ジャーナル	地学雑誌
巻	120
号	1
DOI	https://doi.org/10.5026/jgeography.120.30
出版ステータス	出版済み - 2011/02/25

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title = "九州西端部からの四万十高圧変成岩類の発見",

abstract = "&emsp;206Pb/238U dating of detrital zircons by LA-ICP-MS clarified that the majority of high-P/T Nagasaki metamorphic rocks in western Kyushu contain Late Cretaceous igneous zircon of 89 ± 3 Ma (Turonian-Coniacian) and 86 ± 2 Ma (Coniacian-Santonian). These data indicate that Nagasaki metamorphic rocks are composed mainly of Upper Cretaceous Shimanto metamorphic rocks, i.e. high-P/T metamorphosed accretionary complex of the Cretaceous Shimanto belt. This find strongly supports the subhorizontal geotectonic structure of the Japanese Islands previously inferred from surface geological mapping and deep seismic images.",

author = "KOUCHI Yoshikazu and ORIHASHI Yuji and OBARA Hokuto and MIYATA Kazunori and SHIMOJO Masanori and OTOH Shigeru and AOYAMA Masashi and AKAHORI Yoshimitsu and YANAI Shuichi",

year = "2011",

month = feb,

day = "25",

doi = "10.5026/jgeography.120.30",

language = "日本",

volume = "120",

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journal = "地学雑誌",

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T1 - 九州西端部からの四万十高圧変成岩類の発見

AU - Yoshikazu, KOUCHI

AU - Yuji, ORIHASHI

AU - Hokuto, OBARA

AU - Kazunori, MIYATA

AU - Masanori, SHIMOJO

AU - Shigeru, OTOH

AU - Masashi, AOYAMA

AU - Yoshimitsu, AKAHORI

AU - Shuichi, YANAI

PY - 2011/2/25

Y1 - 2011/2/25

N2 - &emsp;206Pb/238U dating of detrital zircons by LA-ICP-MS clarified that the majority of high-P/T Nagasaki metamorphic rocks in western Kyushu contain Late Cretaceous igneous zircon of 89 ± 3 Ma (Turonian-Coniacian) and 86 ± 2 Ma (Coniacian-Santonian). These data indicate that Nagasaki metamorphic rocks are composed mainly of Upper Cretaceous Shimanto metamorphic rocks, i.e. high-P/T metamorphosed accretionary complex of the Cretaceous Shimanto belt. This find strongly supports the subhorizontal geotectonic structure of the Japanese Islands previously inferred from surface geological mapping and deep seismic images.

AB - &emsp;206Pb/238U dating of detrital zircons by LA-ICP-MS clarified that the majority of high-P/T Nagasaki metamorphic rocks in western Kyushu contain Late Cretaceous igneous zircon of 89 ± 3 Ma (Turonian-Coniacian) and 86 ± 2 Ma (Coniacian-Santonian). These data indicate that Nagasaki metamorphic rocks are composed mainly of Upper Cretaceous Shimanto metamorphic rocks, i.e. high-P/T metamorphosed accretionary complex of the Cretaceous Shimanto belt. This find strongly supports the subhorizontal geotectonic structure of the Japanese Islands previously inferred from surface geological mapping and deep seismic images.

U2 - 10.5026/jgeography.120.30

DO - 10.5026/jgeography.120.30

M3 - 学術論文

SN - 0022-135X

VL - 120

SP - 30

EP - 39

JO - 地学雑誌

JF - 地学雑誌

IS - 1

ER -

九州西端部からの四万十高圧変成岩類の発見

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