Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons
Combined U–Pb and Lu–Hf isotope measurements of single detrital zircon grains in Carboniferous metasediments from Patagonia delineate the source areas of the sediments. The detritus, represented by four metasandstone samples, was deposited prior to onset of subduction in Late Carboniferous time alon...
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Geological Society of London
2016
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ftdatacite:10.6084/m9.figshare.3454355 2023-05-15T13:34:28+02:00 Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons CARITA AUGUSTSSON CARSTEN MÜNKER HEINRICH BAHLBURG C.MARK FANNING 2016 https://dx.doi.org/10.6084/m9.figshare.3454355 https://geolsoc.figshare.com/articles/dataset/Provenance_of_late_Palaeozoic_metasediments_of_the_SW_South_American_Gondwana_margin_a_combined_U_Pb_and_Hf-isotope_study___of_single_detrital_zircons/3454355 unknown Geological Society of London https://dx.doi.org/10.1144/0016-76492005-149 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.3454355 https://doi.org/10.1144/0016-76492005-149 2021-11-05T12:55:41Z Combined U–Pb and Lu–Hf isotope measurements of single detrital zircon grains in Carboniferous metasediments from Patagonia delineate the source areas of the sediments. The detritus, represented by four metasandstone samples, was deposited prior to onset of subduction in Late Carboniferous time along the south Patagonian proto-Pacific Gondwana margin. A broad series of detrital zircon age peaks (0.35–0.7 Ga, 0.9–1.5 Ga) and a large spread (0.3–3.5 Ga) in the age spectra require numerous sources. A fifth metasediment was deposited after the onset of subduction. This syncollisional sample shows two distinct U–Pb age peaks at c . 290 Ma and 305 Ma. This points to a few sources only (Patagonia, West Antarctica). Initial Hf-isotope compositions of selected U–Pb dated zircons from the Carboniferous metasediments reveal zircon protoliths originating from both recycled crust and juvenile sources (εHf (T=0.4–3.5Ga) =−14 to +12). A comparison with crustal compositions of possible source areas indicates that the detritus mainly originated from the interior of Gondwana (Extra-Andean Patagonia, the Argentine Sierra de la Ventana, southernmost Africa, East Antarctica), as well as northern Chile and northwestern Argentina. The sediment transportation paths are consistent with an autochthonous palaeogeographical position of Patagonia with respect to Gondwana in Carboniferous time. Dataset Antarc* Antarctica East Antarctica West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Argentina Argentine East Antarctica Pacific Patagonia West Antarctica |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences CARITA AUGUSTSSON CARSTEN MÜNKER HEINRICH BAHLBURG C.MARK FANNING Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
Combined U–Pb and Lu–Hf isotope measurements of single detrital zircon grains in Carboniferous metasediments from Patagonia delineate the source areas of the sediments. The detritus, represented by four metasandstone samples, was deposited prior to onset of subduction in Late Carboniferous time along the south Patagonian proto-Pacific Gondwana margin. A broad series of detrital zircon age peaks (0.35–0.7 Ga, 0.9–1.5 Ga) and a large spread (0.3–3.5 Ga) in the age spectra require numerous sources. A fifth metasediment was deposited after the onset of subduction. This syncollisional sample shows two distinct U–Pb age peaks at c . 290 Ma and 305 Ma. This points to a few sources only (Patagonia, West Antarctica). Initial Hf-isotope compositions of selected U–Pb dated zircons from the Carboniferous metasediments reveal zircon protoliths originating from both recycled crust and juvenile sources (εHf (T=0.4–3.5Ga) =−14 to +12). A comparison with crustal compositions of possible source areas indicates that the detritus mainly originated from the interior of Gondwana (Extra-Andean Patagonia, the Argentine Sierra de la Ventana, southernmost Africa, East Antarctica), as well as northern Chile and northwestern Argentina. The sediment transportation paths are consistent with an autochthonous palaeogeographical position of Patagonia with respect to Gondwana in Carboniferous time. |
format |
Dataset |
author |
CARITA AUGUSTSSON CARSTEN MÜNKER HEINRICH BAHLBURG C.MARK FANNING |
author_facet |
CARITA AUGUSTSSON CARSTEN MÜNKER HEINRICH BAHLBURG C.MARK FANNING |
author_sort |
CARITA AUGUSTSSON |
title |
Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons |
title_short |
Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons |
title_full |
Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons |
title_fullStr |
Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons |
title_full_unstemmed |
Provenance of late Palaeozoic metasediments of the SW South American Gondwana margin: a combined U–Pb and Hf-isotope study of single detrital zircons |
title_sort |
provenance of late palaeozoic metasediments of the sw south american gondwana margin: a combined u–pb and hf-isotope study of single detrital zircons |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3454355 https://geolsoc.figshare.com/articles/dataset/Provenance_of_late_Palaeozoic_metasediments_of_the_SW_South_American_Gondwana_margin_a_combined_U_Pb_and_Hf-isotope_study___of_single_detrital_zircons/3454355 |
geographic |
Argentina Argentine East Antarctica Pacific Patagonia West Antarctica |
geographic_facet |
Argentina Argentine East Antarctica Pacific Patagonia West Antarctica |
genre |
Antarc* Antarctica East Antarctica West Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica West Antarctica |
op_relation |
https://dx.doi.org/10.1144/0016-76492005-149 |
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.3454355 https://doi.org/10.1144/0016-76492005-149 |
_version_ |
1766053190720028672 |