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    Mesozoic-Tertiary exhumation history of the Altai Mountains, northern Xinjiang, China: new constraints from apatite fission track data

    Yuan, W. and Carter, Andrew and Dong, J. and Bao, Z. and An, Y. and Guo, Z. (2006) Mesozoic-Tertiary exhumation history of the Altai Mountains, northern Xinjiang, China: new constraints from apatite fission track data. Tectonophysics 412 (3-4), pp. 183-193. ISSN 0040-1951.

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    Abstract

    This study uses apatite fission track (FT) analysis to constrain the exhumation history of bedrock samples collected from the Altai Mountains in northern Xinjiang, China. Samples were collected as transects across the main structures related to Palaeozoic crustal accretion events. FT results and modeling identify three stages in sample cooling history spanning the Mesozoic and Tertiary. Stage one records rapid cooling to the low temperature part of the fission track partial annealing zone circa 70 ± 10 °C. Stage two, records a period of relative stability with little if any cooling taking place between ∼75 and ∼25–20 Ma suggesting the Altai region had been reduced to an area of low relief. Support for this can be found in the adjacent Junngar Basin that received little if any sediment during this interval. Final stage cooling took place in the Miocene at an accelerated rate bringing the sampled rocks to the Earth's surface. This last stage, linked to the far field effects of the Himalayan collision, most likely generated the surface uplift and relief that define the present-day Altai Mountains.

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Depositing User: Sarah Hall
    Date Deposited: 16 Jul 2019 12:20
    Last Modified: 16 Jul 2019 12:20
    URI: http://eprints.bbk.ac.uk/id/eprint/28136

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