Basin analysis in polymetamorphic terranes: An example from east Antarctica
U–Pb and Lu–Hf isotopic signatures of detrital and metamorphic zircon in granulite facies paragneiss from Kemp and MacRobertson lands, east Antarctica, distinguish two extensive Precambrian basins: (1) an Archaean basin deposited between c. 2570 Ma and c. 2500–2430 Ma, which extended across Kemp Lan...
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Online Access: | http://hdl.handle.net/2440/83448 https://doi.org/10.1016/j.precamres.2013.03.015 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/83448 2023-05-15T13:34:44+02:00 Basin analysis in polymetamorphic terranes: An example from east Antarctica Halpin, J. Daczko, N. Clarke, G. Murray, K. 2013 http://hdl.handle.net/2440/83448 https://doi.org/10.1016/j.precamres.2013.03.015 en eng Elsevier Science BV Precambrian Research, 2013; 231:78-97 0301-9268 http://hdl.handle.net/2440/83448 doi:10.1016/j.precamres.2013.03.015 © 2013 Elsevier B.V. All rights reserved. Anatexis Detrital zircon Hafnium isotopes Metasediments Rayner Orogen Rodinia Journal article 2013 ftunivadelaidedl https://doi.org/10.1016/j.precamres.2013.03.015 2023-02-06T07:02:02Z U–Pb and Lu–Hf isotopic signatures of detrital and metamorphic zircon in granulite facies paragneiss from Kemp and MacRobertson lands, east Antarctica, distinguish two extensive Precambrian basins: (1) an Archaean basin deposited between c. 2570 Ma and c. 2500–2430 Ma, which extended across Kemp Land contiguous with equivalent paragneiss in the adjacent Napier Complex in Enderby Land; and (2) a late Mesoproterozoic basin deposited after c. 1110–1080 Ma in MacRobertson Land that extends into eastern Kemp Land, which also incorporates rocks currently exposed in the Eastern Ghats Province of India and the Prydz Bay region of east Antarctica. An unconformity that separates the Archaean and Mesoproterozoic sedimentary packages is near the Stillwell Hills. An eastward increase in the proportion of fragmentary detrital zircon in the younger package reflects proximity to late Mesoproterozoic volcanic sources. The Mesoproterozoic basin likely developed along an Andean-type margin to the Indo-Antarctic craton, possibly in a back-arc setting during the assembly of Rodinia. The widespread dissolution of zircon at c. 990–940 Ma during Rayner orogenesis in Kemp and MacRobertson lands largely precludes a traditional basin analysis via detrital geochronology, but the Hf isotopic ratio of metamorphic zircon precipitated following anatexis provides a homogenised signature, equivalent to a bulk-rock model age, which can be used as a stratigraphic proxy. This approach captures “hidden” provenance information to enable lithostratigraphic correlation in complex high-grade terranes. Jacqueline A. Halpin, Nathan R. Daczkoa, Geoffrey L. Clarke, Kathleen R. Murray Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Enderby Land Kemp Land MacRobertson Land Prydz Bay The University of Adelaide: Digital Library Antarctic East Antarctica Kathleen ENVELOPE(172.800,172.800,-83.767,-83.767) Kemp Land ENVELOPE(57.500,57.500,-67.500,-67.500) MacRobertson Land ENVELOPE(65.000,65.000,-70.000,-70.000) Napier ENVELOPE(-58.440,-58.440,-62.167,-62.167) Prydz Bay Rayner ENVELOPE(-45.166,-45.166,-60.650,-60.650) Stillwell Hills ENVELOPE(59.467,59.467,-67.417,-67.417) Precambrian Research 231 78 97 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Anatexis Detrital zircon Hafnium isotopes Metasediments Rayner Orogen Rodinia |
spellingShingle |
Anatexis Detrital zircon Hafnium isotopes Metasediments Rayner Orogen Rodinia Halpin, J. Daczko, N. Clarke, G. Murray, K. Basin analysis in polymetamorphic terranes: An example from east Antarctica |
topic_facet |
Anatexis Detrital zircon Hafnium isotopes Metasediments Rayner Orogen Rodinia |
description |
U–Pb and Lu–Hf isotopic signatures of detrital and metamorphic zircon in granulite facies paragneiss from Kemp and MacRobertson lands, east Antarctica, distinguish two extensive Precambrian basins: (1) an Archaean basin deposited between c. 2570 Ma and c. 2500–2430 Ma, which extended across Kemp Land contiguous with equivalent paragneiss in the adjacent Napier Complex in Enderby Land; and (2) a late Mesoproterozoic basin deposited after c. 1110–1080 Ma in MacRobertson Land that extends into eastern Kemp Land, which also incorporates rocks currently exposed in the Eastern Ghats Province of India and the Prydz Bay region of east Antarctica. An unconformity that separates the Archaean and Mesoproterozoic sedimentary packages is near the Stillwell Hills. An eastward increase in the proportion of fragmentary detrital zircon in the younger package reflects proximity to late Mesoproterozoic volcanic sources. The Mesoproterozoic basin likely developed along an Andean-type margin to the Indo-Antarctic craton, possibly in a back-arc setting during the assembly of Rodinia. The widespread dissolution of zircon at c. 990–940 Ma during Rayner orogenesis in Kemp and MacRobertson lands largely precludes a traditional basin analysis via detrital geochronology, but the Hf isotopic ratio of metamorphic zircon precipitated following anatexis provides a homogenised signature, equivalent to a bulk-rock model age, which can be used as a stratigraphic proxy. This approach captures “hidden” provenance information to enable lithostratigraphic correlation in complex high-grade terranes. Jacqueline A. Halpin, Nathan R. Daczkoa, Geoffrey L. Clarke, Kathleen R. Murray |
format |
Article in Journal/Newspaper |
author |
Halpin, J. Daczko, N. Clarke, G. Murray, K. |
author_facet |
Halpin, J. Daczko, N. Clarke, G. Murray, K. |
author_sort |
Halpin, J. |
title |
Basin analysis in polymetamorphic terranes: An example from east Antarctica |
title_short |
Basin analysis in polymetamorphic terranes: An example from east Antarctica |
title_full |
Basin analysis in polymetamorphic terranes: An example from east Antarctica |
title_fullStr |
Basin analysis in polymetamorphic terranes: An example from east Antarctica |
title_full_unstemmed |
Basin analysis in polymetamorphic terranes: An example from east Antarctica |
title_sort |
basin analysis in polymetamorphic terranes: an example from east antarctica |
publisher |
Elsevier Science BV |
publishDate |
2013 |
url |
http://hdl.handle.net/2440/83448 https://doi.org/10.1016/j.precamres.2013.03.015 |
long_lat |
ENVELOPE(172.800,172.800,-83.767,-83.767) ENVELOPE(57.500,57.500,-67.500,-67.500) ENVELOPE(65.000,65.000,-70.000,-70.000) ENVELOPE(-58.440,-58.440,-62.167,-62.167) ENVELOPE(-45.166,-45.166,-60.650,-60.650) ENVELOPE(59.467,59.467,-67.417,-67.417) |
geographic |
Antarctic East Antarctica Kathleen Kemp Land MacRobertson Land Napier Prydz Bay Rayner Stillwell Hills |
geographic_facet |
Antarctic East Antarctica Kathleen Kemp Land MacRobertson Land Napier Prydz Bay Rayner Stillwell Hills |
genre |
Antarc* Antarctic Antarctica East Antarctica Enderby Land Kemp Land MacRobertson Land Prydz Bay |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Enderby Land Kemp Land MacRobertson Land Prydz Bay |
op_relation |
Precambrian Research, 2013; 231:78-97 0301-9268 http://hdl.handle.net/2440/83448 doi:10.1016/j.precamres.2013.03.015 |
op_rights |
© 2013 Elsevier B.V. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.precamres.2013.03.015 |
container_title |
Precambrian Research |
container_volume |
231 |
container_start_page |
78 |
op_container_end_page |
97 |
_version_ |
1766056705904345088 |