| Constraints of U-Pb zircon dating on the evolution of the Nan-Uttaradit suture zone in northern Thailand |
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| 关键词:Nan-Uttaradit suture ophiolite mélange zircon U-Pb dating |
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| 作者 | 单位 | E-mail | | YANG Wen-qiang | State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China | qinglaifeng@cug.edu.cn | | FENG Qing-lai | State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China | | | SHEN Shang-yue | State Key Laboratory of GPMR, China University of Geosciences, Wuhan 430074, China | | | Chongpan CHONGLAKMANI | School of Geotechnology, Suranaree University of Technology, Nakhon Ratchasima, Thailand | |
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| Constraints of U-Pb zircon dating on the evolution of the Nan-Uttaradit suture zone in northern Thailand |
| 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. |
| YANG Wen-qiang,FENG Qing-lai,SHEN Shang-yue,Chongpan CHONGLAKMANI.2009.Constraints of U-Pb zircon dating on the evolution of the Nan-Uttaradit suture zone in northern Thailand[J].Acta Geoscientica Sinica,30(S1):88-89. |
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