直近一年間の累計
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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
キーワード
Granite
Southeastern Thailand
Geochemical signature
Sr-Nd isotope ratios
Zircon U-Pb dating
Tectonic setting
資料タイプ
学術雑誌論文
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.
掲載誌名
Journal of Asian Earth Sciences: X
ISSN
25900560
出版者
Elsevier
8
開始ページ
100111
発行日
2022-07-12
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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出版社版DOI
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フルテキストファイル
言語
eng
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部局
理工学系