Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/45234
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Type: Journal article
Title: Discovery of a Neoproterozoic basin in the Prydz belt in East Antarctica and its implications for Gondwana assembly and ultrahigh temperature metamorphism
Author: Kelsey, D.
Wade, B.
Collins, A.
Hand, M.
Sealing, C.
Netting, A.
Citation: Precambrian Research, 2008; 161(3-4):355-388
Publisher: Elsevier Science BV
Issue Date: 2008
ISSN: 0301-9268
1872-7433
Statement of
Responsibility: 
D.E. Kelsey, B.P. Wade, A.S. Collins, M. Hand, C.R. Sealing and A. Netting
Abstract: Detrital zircon U-Pb age data from ultrahigh-temperature metasedimentary rocks (950 °C and 10-12 kbar) in the Rauer Group and a granulite grade metasedimentary rock (850 °C and 7-8 kbar) in the Bolingen Islands in Prydz Bay, East Antarctica, indicate the existence of a Neoproterozoic (Ediacaran) cover sequence that was deposited on basement ranging in age between approximately 2800 Ma and 940 Ma. The Neoproterozoic succession has a maximum depositional age of approximately 600 Ma with derivation from igneous and metamorphic sources of Archaean, Palaeoproterozoic and Neoproterozoic age. The minimum depositional age is constrained to be approximately 575 Ma based on existing (Th + U)-Pb monazite metamorphic ages from the UHT metasedimentary rocks. The identification of Late Neoproterozoic protoliths to the UHT granulites in the Rauer Group demonstrate that ultrahigh-temperature metamorphism in Prydz Bay must be Ediacaran to Cambrian in age. The timing of basin development (ca. 600-575 Ma) is coincident with the amalgamation of eastern Gondwana. The palaeogeography of the Prydz Bay region during the amalgamation of Gondwana is uncertain, but in our proposed reconstruction we suggest that inherited zircons were derived from Indo-Antarctic crust. Ocean closure is inferred to have occurred along a suture zone to the southeast of Prydz Bay and the Prince Charles Mountains. Our palaeogeographic model invites further work on the possibility of a shared history between India and a large portion of East Antarctica prior to the final amalgamation of eastern Gondwana during the Ediacaran-Cambrian. © 2007 Elsevier B.V. All rights reserved.
Keywords: Detrital zircon
Gondwana
Rauer Group
Bolingen Islands
Metamorphism
Rights: © 2007 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.precamres.2007.09.003
Description (link): http://www.elsevier.com/wps/find/journaldescription.cws_home/503357/description#description
Published version: http://dx.doi.org/10.1016/j.precamres.2007.09.003
Appears in Collections:Aurora harvest
Environment Institute publications
Geology & Geophysics publications

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