ID | 117289 |
著者 |
Uchida, Etsuo
Waseda University
Nagano, Shinya
Waseda University
Niki, Sota
The University of Tokyo
Yonezu, Kou
Waseda University
Shin, Ki-Cheol
Research Institute for Humanity and Nature
Hirata, Takafumi
The University of Tokyo
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キーワード | Granite
Southeastern Thailand
Geochemical signature
Sr-Nd isotope ratios
Zircon U-Pb dating
Tectonic setting
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資料タイプ |
学術雑誌論文
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抄録 | The Chanthaburi, Pliew, Klathing, Khao Cha Mao, and Khao Hin Son granitic bodies in Chanthaburi and Chachoengsao provinces in southeastern Thailand, which are located on the southwestern side of the Mae Ping Fault and eastern side of the Klaeng Fault, were investigated. In this study, magnetic susceptibility measurements, whole-rock chemical composition and Nd-Sr isotope analyses, and zircon U-Pb dating were conducted on these granitic bodies. The surveyed granitic rocks are classified as I- to A-type granites, are of the ilmenite series, and show clearly negative Eu anomalies, which suggest they formed under reducing conditions. Nd-Sr isotope ratios indicate continental crust material involvement in the formation of these granite bodies. The magnetic and geochemical signatures are similar to those of granite bodies in southwestern Cambodia. The study area is thus considered an extensional area of southwestern Cambodia, corresponding to the Sukhothai Zone (the Chanthaburi-Kampong Chhnang Zone). Zircon U-Pb dating yields ages of 208–214 Ma (the Late Triassic) for granite bodies except for the Khao Cha Mao granitic body, which dates to 55 Ma. The former age corresponds to the collision time of the Sibumasu and Indochina terranes, and the latter age is likely related to the collision time of the Indian and Eurasian continents.
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掲載誌名 |
Journal of Asian Earth Sciences: X
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ISSN | 25900560
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出版者 | Elsevier
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巻 | 8
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開始ページ | 100111
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発行日 | 2022-07-12
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権利情報 | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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EDB ID | |
出版社版DOI | |
出版社版URL | |
フルテキストファイル | |
言語 |
eng
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著者版フラグ |
出版社版
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部局 |
理工学系
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