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    Heinonen, Jussi S. Luttinen, Arto V. Riley, Teal R. and Michallik, Radoslaw M. 2013. Mixed pyroxenite–peridotite sources for mafic and ultramafic dikes from the Antarctic segment of the Karoo continental flood basalt province. Lithos, Vol. 177, p. 366.


    Marschall, Horst R. Hawkesworth, Chris J. and Leat, Philip T. 2013. Mesoproterozoic subduction under the eastern edge of the Kalahari-Grunehogna Craton preceding Rodinia assembly: The Ritscherflya detrital zircon record, Ahlmannryggen (Dronning Maud Land, Antarctica). Precambrian Research, Vol. 236, p. 31.


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    Jones, S.F. Wielens, H. Williamson, M-C. and Zentilli, M. 2007. IMPACT OF MAGMATISM ON PETROLEUM SYSTEMS IN THE SVERDRUP BASIN, CANADIAN ARCTIC ISLANDS, NUNAVUT: A NUMERICAL MODELLING STUDY. Journal of Petroleum Geology, Vol. 30, Issue. 3, p. 237.


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Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica

  • MICHAEL L. CURTIS (a1) and TEAL R. RILEY (a1)
  • DOI: http://dx.doi.org/10.1017/S0954102003001408
  • Published online: 01 September 2003
Abstract

Large mafic sills in the Ahlmannryggen region of western Dronning Maud Land were intruded into partially lithified sediments of the mid-Proterozoic Ritscherflya Supergroup. Clastic sedimentary dykes intruding the thick mafic sills have been identified, and show evidence for fluidization of the partially lithified sediments. Previous work had demonstrated in situ fluidization and localized anatectic melting. This study demonstrates mobilization of the fluidized sediments, with penetration at least 50 m into the fractured, intruding sill. Physical features within the clastic dykes (e.g. sediment balls, flame structures) suggest that the sediments were largely unconsolidated, or at most only partially lithified. The presence of a thin zone of anatectic melt along the dyke—sill contact suggests that the mafic sill was still hot (c. 700°C) at the time of sedimentary dyke injection.

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Antarctic Science
  • ISSN: 0954-1020
  • EISSN: 1365-2079
  • URL: /core/journals/antarctic-science
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