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    Cenozoic tectonic evolution of south-eastern Thailand derived from low-temperature thermochronology

    Nachtergaele, S. and Glorie, S. and Morley, C. and Charusiri, P. and Kanjanapayont, P. and Vermeesch, P. and Carter, Andy and Ranst, G. and De Grave, J. (2019) Cenozoic tectonic evolution of south-eastern Thailand derived from low-temperature thermochronology. Journal of the Geological Society , ISSN 0016-7649. (In Press)

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    Abstract

    Low-temperature thermochronologic techniques, specifically apatite (U-Th)/He and apatite fission track dating were used to reconstruct the thermal history of south-eastern Thailand. This area is intersected by vast and complex fault networks related to the Cenozoic Mae Ping and Three Pagodas Faults. These were identified from satellite imagery and confirmed by field observations. New apatite fission track and apatite (U-Th)/He data were collected from crystalline basement blocks within these fault networks. Ages obtained range from 48 Ma to 24 Ma, with most of the samples clustering between 36 and 24 Ma. Thermal history modelling indicates late Eocene – Oligocene exhumation of the exposed granitic and metamorphic basement rocks in south-eastern Thailand. Exhumation was regional and was contemporaneous with sinistral fault activity during the late Eocene – early Oligocene along the Mae Ping Fault and Three Pagodas Fault. Moreover, this exhumation occurred coevally with a syn-rift phase of intracontinental offshore rift basin and half-graben basin development in the eastern Gulf of Thailand. The phase of exhumation ended in the early Miocene, as a result of the changing plate tectonic forces along the complex plate boundaries of Sundaland.

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Research Centre: Earth and Planetary Sciences, Institute of
    Depositing User: Andy Carter
    Date Deposited: 02 Oct 2019 12:52
    Last Modified: 04 Oct 2019 17:00
    URI: http://eprints.bbk.ac.uk/id/eprint/29115

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