Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Ion-probe dating of 1.2 Ga collision and crustal architecture in the Namaqua-Natal Province of southern Africa

    20317_20317.pdf (1.653Mb)
    Access Status
    Open access
    Authors
    Pettersson, A.
    Cornell, D.
    Moen, H.
    Reddy, Steven
    Evans, D.
    Date
    2007
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Pettersson, Asa and Cornell, David H. and Moen, Henri F. G. and Reddy, Steven and Evans, David. 2007. Ion-probe dating of 1.2 Ga collision and crustal architecture in the Namaqua-Natal Province of southern Africa. Precambrian Research. 158 (1-2): pp. 79-92.
    Source Title
    Precambrian Research
    DOI
    10.1016/j.precamres.2007.04.006
    Faculty
    Department of Applied Geology
    Division of Resources and Environment
    Remarks

    NOTICE: this is the author’s version of a work that was accepted for publication in Precambrian Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Precambrian Research, Volume 158, Issues 1–2, 15 September 2007, Pages 79–92, http://dx.doi.org/10.1016/j.precamres.2007.04.006

    URI
    http://hdl.handle.net/20.500.11937/45352
    Collection
    • Curtin Research Publications
    Abstract

    The Namaqua-Natal Province of southern Africa formed a part of the Kalahari craton, possibly linked to the ~1.0 Ga supercontinent Rodinia, but the timing of assembly and its positioning relation to other components is still debated. Thorough ion-probe zircon dating combined with strategic field observations in the tectonic front of a metamorphic belt can clarify some of these issues. In this study, the age of two "pretectonic" units, constrains the timing of collision and clarifies the role of the Koras Group as a tectonostratigraphic marker. The volcanosedimentary Wilgenhoutsdrif Group contains Archaean and Paleoproterozoic material, showing that it probably formed in a continental rift or a passive margin setting, before its involvement in the Namaqua collision event. At 124112 Ma the Areachap island arc magmatism was in progress, followed by a collision event around 1200 Ma which at 116510 Ma gave rise to migmatites in the island arc terrane. At the same time (117312 Ma) in the adjoining Kaaien terrane the first sequence of Koras Group bimodal magmatism formed in a fault basin, invalidating the concept that this Group is a tectonostratigraphic marker of the end of tectonism in the whole Namaqua Province. A time of little activity followed, with yet another pulse of magmatism at 1100-1090 Ma, giving rise to a second sequence of sedimentation and volcanism in the Koras Group, as well as correlated intrusive rocks.This second pulse is not related to any significant regional deformation and may have been thermally induced. It is in part coeval with the Umkundo large igneous province of the Kaapvaal and Zimbabwe Cratons. These formations preserve an important record for reconstructing Rodinia and our 10937Ma U-Pb age of the uppermost volcanic formation of the Koras Group, should be used as the age for the Kalkpunt formation, frequently cited as a Kalahari Craton paleopole.

    Related items

    Showing items related by title, author, creator and subject.

    • Not-so-suspect terrane: Constraints on the crustal evolution of the Rudall Province
      Kirkland, C.; Johnson, S.; Smithies, R.; Hollis, J.; Wingate, M.; Tyler, I.; Hickman, A.; Cliff, J.; Tessalina, Svetlana; Belousova, E.; Murphy, R. (2013)
      Time-constrained isotopic datasets permit the evaluation of tectonic processes, including continental collision, rifting, and the origins of terrane fragments. The Rudall Province, in the Paterson Orogen, is part of the ...
    • Is the rate of supercontinent assembly changing with time?
      Condie, K.; Pisarevskiy, Sergei; Korenaga, J.; Gardoll, Stephen (2014)
      To address the question of secular changes in the speed of the supercontinent cycle, we use two major databases for the last 2.5 Gyr: the timing and locations of collisional and accretionary orogens, and average plate ...
    • The burning heart - The Proterozoic geology and geological evolution of the west Musgrave Region, central Australia
      Howard, H.; Smithies, R.; Kirkland, Chris; Kelsey, D.; Aitken, A.; Wingate, M.; Quentin de Gromard, R.; Spaggiari, C.; Maier, W. (2015)
      The Musgrave Province is one of the most geodynamically significant of Australia's Proterozoic orogenic belts, lying at the intersection of the continent's three cratonic elements - the West, North and South Australian ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.