Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections
New feldspar lead isotope compositions of crystalline rocks from the Indian Ocean sector of East Antarctica, in conjunction with the review of data from elsewhere within the continent and from continents formerly adjacent within Gondwana, refine boundaries and evolutionary histories of terranes prev...
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2016
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ftdatacite:10.6084/m9.figshare.3453353 2023-05-15T14:05:28+02:00 Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections M. J. Flowerdew S. Tyrrell S. D. Boger I. C. W. Fitzsimons S. L. Harley E. V. Mikhalsky A. P. M. Vaughan 2016 https://dx.doi.org/10.6084/m9.figshare.3453353 https://geolsoc.figshare.com/articles/dataset/Pb_isotopic_domains_from_the_Indian_Ocean_sector_of_Antarctica_implications_for_past_Antarctica_India_connections/3453353 unknown Geological Society of London https://dx.doi.org/10.1144/sp383.3 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3453353 https://doi.org/10.1144/sp383.3 2021-11-05T12:55:41Z New feldspar lead isotope compositions of crystalline rocks from the Indian Ocean sector of East Antarctica, in conjunction with the review of data from elsewhere within the continent and from continents formerly adjacent within Gondwana, refine boundaries and evolutionary histories of terranes previously inferred from geological mapping and complementary isotope studies. Coastal Archaean Vestfold and Napier complexes have overlapping compositions and had Pb isotopes homogenized at 2.5 Ga sourced from or within already fractionated protoliths with high and variable U–Pb. Identical compositions from the Dharwar Craton of India support a correlation with these Antarctic terranes. The Proterozoic–Palaeozoic Rayner Complex and Prydz Belt yield more radiogenic compositions and are broadly similar and strongly suggest these units correlate with parts of the Eastern Ghats Belt of India. A strikingly different signature is evident from the inboard Ruker Complex, which yielded unradiogenic compositions. This complex is unlike any unit within India or Australia, suggesting that these rocks represent exposures of an Antarctic (Crohn) Craton. Compositions from the enigmatic Rauer Terrane are consistent with a shared early history with the Ruker Complex but with a different post-Archaean evolution. Dataset Antarc* Antarctic Antarctica East Antarctica DataCite Metadata Store (German National Library of Science and Technology) Antarctic East Antarctica Indian Napier ENVELOPE(-58.440,-58.440,-62.167,-62.167) Rayner ENVELOPE(-45.166,-45.166,-60.650,-60.650) Ruker ENVELOPE(64.583,64.583,-73.583,-73.583) Vestfold |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences M. J. Flowerdew S. Tyrrell S. D. Boger I. C. W. Fitzsimons S. L. Harley E. V. Mikhalsky A. P. M. Vaughan Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
New feldspar lead isotope compositions of crystalline rocks from the Indian Ocean sector of East Antarctica, in conjunction with the review of data from elsewhere within the continent and from continents formerly adjacent within Gondwana, refine boundaries and evolutionary histories of terranes previously inferred from geological mapping and complementary isotope studies. Coastal Archaean Vestfold and Napier complexes have overlapping compositions and had Pb isotopes homogenized at 2.5 Ga sourced from or within already fractionated protoliths with high and variable U–Pb. Identical compositions from the Dharwar Craton of India support a correlation with these Antarctic terranes. The Proterozoic–Palaeozoic Rayner Complex and Prydz Belt yield more radiogenic compositions and are broadly similar and strongly suggest these units correlate with parts of the Eastern Ghats Belt of India. A strikingly different signature is evident from the inboard Ruker Complex, which yielded unradiogenic compositions. This complex is unlike any unit within India or Australia, suggesting that these rocks represent exposures of an Antarctic (Crohn) Craton. Compositions from the enigmatic Rauer Terrane are consistent with a shared early history with the Ruker Complex but with a different post-Archaean evolution. |
format |
Dataset |
author |
M. J. Flowerdew S. Tyrrell S. D. Boger I. C. W. Fitzsimons S. L. Harley E. V. Mikhalsky A. P. M. Vaughan |
author_facet |
M. J. Flowerdew S. Tyrrell S. D. Boger I. C. W. Fitzsimons S. L. Harley E. V. Mikhalsky A. P. M. Vaughan |
author_sort |
M. J. Flowerdew |
title |
Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections |
title_short |
Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections |
title_full |
Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections |
title_fullStr |
Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections |
title_full_unstemmed |
Pb isotopic domains from the Indian Ocean sector of Antarctica: implications for past Antarctica–India connections |
title_sort |
pb isotopic domains from the indian ocean sector of antarctica: implications for past antarctica–india connections |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453353 https://geolsoc.figshare.com/articles/dataset/Pb_isotopic_domains_from_the_Indian_Ocean_sector_of_Antarctica_implications_for_past_Antarctica_India_connections/3453353 |
long_lat |
ENVELOPE(-58.440,-58.440,-62.167,-62.167) ENVELOPE(-45.166,-45.166,-60.650,-60.650) ENVELOPE(64.583,64.583,-73.583,-73.583) |
geographic |
Antarctic East Antarctica Indian Napier Rayner Ruker Vestfold |
geographic_facet |
Antarctic East Antarctica Indian Napier Rayner Ruker Vestfold |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
https://dx.doi.org/10.1144/sp383.3 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3453353 https://doi.org/10.1144/sp383.3 |
_version_ |
1766277365277655040 |