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Timing of exhumation and deformation across the Taimyr fold–thrust belt: insights from apatite fission track dating and balanced cross-sections
Stockholm University, Faculty of Science, Department of Geological Sciences.
Stockholm University, Faculty of Science, Department of Geological Sciences.ORCID iD: 0000-0003-0498-1849
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2018 (English)In: Geological Society Special Publication, ISSN 0305-8719, E-ISSN 2041-4927, Vol. 460, p. 315-333Article in journal (Refereed) Published
Abstract [en]

The exhumation and shortening history associated with the Taimyr fold–thrust belt is determined using apatite fission track and balanced cross-section analysis. Eighteen samples from across northern, central and southern Taimyr are used for apatite fission track analysis. These include granite, meta-arenite and sandstone samples with stratigraphic ages ranging from the late Proterozoic to Early Cretaceous. Fission track lengths and central ages are used to model the thermal history of the region and indicate three episodes of cooling in the Early Permian, earliest Triassic and Late Triassic. The thermochronological data are integrated with two balanced regional cross-sections. The regional structural style of deformation reflects a thick-skinned thrust system with 15% shortening (minimum estimate). This is consistent with thickening during early Permian Uralian orogenesis, followed by later heating, uplift and cooling associated with Siberian Trap magmatism and/or Mesozoic transpression.

Place, publisher, year, edition, pages
2018. Vol. 460, p. 315-333
National Category
Earth and Related Environmental Sciences
Research subject
Geology
Identifiers
URN: urn:nbn:se:su:diva-155029DOI: 10.1144/SP460.3OAI: oai:DiVA.org:su-155029DiVA, id: diva2:1196595
Available from: 2018-04-10 Created: 2018-04-10 Last updated: 2018-04-17Bibliographically approved

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