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dc.contributor.advisor SAJAR en_ZA Author en_ZA Moyes, A.B.
dc.coverage.spatial Antarctica en_ZA
dc.coverage.spatial Marion Island | Prince Edward Island 2018-08-23T07:58:03Z 2018-08-23T07:58:03Z 1971 en_ZA 1978 1971 en_ZA 1978
dc.description.abstract abstract en_ZA
dc.description.abstract Rb-Sr and Sm-Nd whole-rock data are presented for the Jutulsessen granitic gneiss, deformed intrusive mafic dykes, and cross-cutting pegmatites and aplites. The data indicate that Nd-isotopic homogenisation last occurred at ?1 153 Ma, whereas Sr-isotopic homogenisation last occurred at ?535 Ma. Both ages are significant in that they correspond to widely recognised periods of tectonothermal activity, namely the latest Kibaran orogeny and the late Ross (or Pan-African) orogeny. The age discrepancy is attributed to isotopic decoupling of the Rb-Sr system from the Sm-Nd system during the Late Cambrian. The intrusive age of the Jutulsessen granitic suite is interpreted to be ?1 153 Ma, and the combined Sr and Nd data suggest that it was derived from a mantle-type source (I-type), or from juvenile sediments with short crustal residence times. The isotopic data also imply that the observed structural D1, and D2 events at Jutulsessen are Proterozoic in age, and the D3 event is Late Cambrian. Comparison of these data with other areas of the East Antarctic craton and elsewhere indicate that the Early Cambrian Ross orogeny extensively reactivated on older Kibaran orogenic belt, but that the effects of this reactivation are variable and difficult to characterise from one area to another. en_ZA
dc.description.sponsorship Sponsored by the National Research Foundation (South Africa) en_ZA
dc.description.sponsorship Sponsored by the National Research Foundation (South Africa)
dc.description.statementofresponsibility Antarctic Legacy of South Africa en_ZA
dc.description.statementofresponsibility Antarctic Legacy Project
dc.language en_ZA en_ZA
dc.language en_ZA
dc.publisher South African Journal of Antarctic Research en_ZA
dc.publisher South African Journal of Antarctic Research Vol 23, No 1 and No 2
dc.relation.ispartof Vol 4 en_ZA
dc.rights Copyright en_ZA
dc.rights Copyright
dc.subject Antarctica en_ZA
dc.subject Antarctica
dc.subject Geophysics
dc.subject Jutulsessen
dc.subject Granitic
dc.subject Gneiss
dc.title Title en_ZA
dc.title The age and origin of the Jutulsessen granitic gneiss, Gjelsvikfjella, Dronning Maud Land
dc.type Articles en_ZA
dc.type Articles
iso19115.mdconstraints.uselimitation This item and the content of this website are subject to copyright protection. Reproduction of the content, or any part of it, other than for research, academic or non-commercial use is prohibited without prior consent from the copyright holder. en_za PDF en_za
iso19115.mdidentification.deliverypoint Antarctic Legacy of South Africa, Faculty of Science, Stellenbosch University. Private Bag X1, Matieland. Stellenbosch. South Africa. en_za
iso19115.mdidentification.electronicmailaddress en-za

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