| Constraints of U-Pb zircon dating on the evolution of the Nan-Uttaradit suture zone in northern Thailand |
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| 作者姓名： | YANG Wen-qiang FENG Qing-lai SHEN Shang-yue Chongpan CHONGLAKMANI |
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| 作者单位： | State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China;State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China;State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China;School of Geotechnology, Suranaree University of Technology, Nakhon Ratchasima, Thailand |
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| 摘 要： | Nan-Uttaradit suture zone in northern Thailand is a narrow N-S trending and discontinuous ophiolite belt along the Nan River (Barr and MacDonald, 1987). It was interpreted as the Paleo-Tethys oceanic remnants that separate Shan-Thai (Sibumasu) terrane and Indo-china terrane (Bunopas, 1981; Hada, 1999), and rein-terpreted as the boundary of Sukhothai (or Simao) terrane and the Indochina terrane that representing a segment of the back-arc basin (Barr and MacDonald, 1991; Ueno and Hisada, 2001; Metcalfe, 2006; Ferrari et al., 2008; Sone and Metcalfe, 2008). This zone is dominated by Carboniferous to Permian Pha Som Metamorphic Complex (Hess and Koch, 1975). The Pha Som Metamorphic Complex consists of several tectonostratigraphic slices of volcanic rocks, schists, meta-greywacke, serpentinite and bedded chert. And it is in fault contact with Pak Pat volcanic rocks. Both of Pha Som Metamorphic Complex and Pak Pat volcanic rocks are covered by the Upper Triassic and the Juras-sic red sandstones with angular unconformity. Previ-ous studies mainly focused on the amalgamation epi-sodes of the Sukhothai terrane and Indochina terrane. The Late Carboniferous to Early Permian age of the opening of the basin was proposed by some authors (Singharajwarapan and Berry, 2000; Metcalfe, 2006; Ferrari et al., 2008) on the basis of the regional strati-graphy, different dating of cherts, and schists from the Pha Som Metamorphic Complex.
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| 关 键 词： | Nan-Uttaradit suture ophiolite mélange zircon U-Pb dating |
Constraints of U-Pb zircon dating on the evolution of the Nan-Uttaradit suture zone in northern Thailand |
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| YANG Wen-qiang,FENG Qing-lai,SHEN Shang-yue,Chongpan CHONGLAKMANI.Constraints of U-Pb zircon dating on the evolution of the Nan-Uttaradit suture zone in northern Thailand[J].Acta Geoscientia Sinica,2009,30(Z1):88-89. |
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| Authors: | YANG Wen-qiang FENG Qing-lai SHEN Shang-yue and Chongpan CHONGLAKMANI |
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| Institution: | State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China;State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China;State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China;School of Geotechnology, Suranaree University of Technology, Nakhon Ratchasima, Thailand |
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| Abstract: | Nan-Uttaradit suture zone in northern Thailand is a narrow N-S trending and discontinuous ophiolite belt along the Nan River (Barr and MacDonald, 1987). It was interpreted as the Paleo-Tethys oceanic remnants that separate Shan-Thai (Sibumasu) terrane and Indo-china terrane (Bunopas, 1981; Hada, 1999), and rein-terpreted as the boundary of Sukhothai (or Simao) terrane and the Indochina terrane that representing a segment of the back-arc basin (Barr and MacDonald, 1991; Ueno and Hisada, 2001; Metcalfe, 2006; Ferrari et al., 2008; Sone and Metcalfe, 2008). This zone is dominated by Carboniferous to Permian Pha Som Metamorphic Complex (Hess and Koch, 1975). The Pha Som Metamorphic Complex consists of several tectonostratigraphic slices of volcanic rocks, schists, meta-greywacke, serpentinite and bedded chert. And it is in fault contact with Pak Pat volcanic rocks. Both of Pha Som Metamorphic Complex and Pak Pat volcanic rocks are covered by the Upper Triassic and the Juras-sic red sandstones with angular unconformity. Previ-ous studies mainly focused on the amalgamation epi-sodes of the Sukhothai terrane and Indochina terrane. The Late Carboniferous to Early Permian age of the opening of the basin was proposed by some authors (Singharajwarapan and Berry, 2000; Metcalfe, 2006; Ferrari et al., 2008) on the basis of the regional strati-graphy, different dating of cherts, and schists from the Pha Som Metamorphic Complex. |
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