Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region
Lu-Hf isotope data are presented for dated Permian zircon grains from six samples of the latest Palaeozoic to Jurassic low-grade metasedimentary rocks of western Patagonia and the northern Antarctic Peninsula, as well as from potential source rocks in the North Patagonian Massif. The results for the...
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ftconicet:oai:ri.conicet.gov.ar:11336/196386 2023-10-09T21:47:15+02:00 Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region Fanning, C. Mark Hervé, Francisco Pankhurst, Robert Rapela, Carlos Washington Kleiman, Laura Elena Yaxley, Greg M. Castillo, Paula application/pdf http://hdl.handle.net/11336/196386 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0895981111000319 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2011.03.007 http://hdl.handle.net/11336/196386 Fanning, C. Mark; Hervé, Francisco; Pankhurst, Robert; Rapela, Carlos Washington; Kleiman, Laura Elena; et al.; Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 32; 4; 1-2011; 485-496 0895-9811 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ANTARCTIC PENINSULA HF ISOTOPES PATAGONIA PERMIAN PROVENANCE ZIRCON https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.jsames.2011.03.007 2023-09-24T18:15:41Z Lu-Hf isotope data are presented for dated Permian zircon grains from six samples of the latest Palaeozoic to Jurassic low-grade metasedimentary rocks of western Patagonia and the northern Antarctic Peninsula, as well as from potential source rocks in the North Patagonian Massif. The results for the metasedimentary rocks yield eHf values mostly between _15 and þ4 (130 analyses), with a dominant range (more than 85%) of _6 to þ1, indicating provenance from Permian magmatic rocks that incorporated continental crust with a significant residence time. Other zircon grains record more negative eHf values indicating derivation from yet more mature crustal sources. Permian subvolcanic granites in the North Patagonian massif appear to be the closest large source area and dated zircon grains from eight samples of these granites yield initial of eHf values of _12 to þ4 (45 measurements), 84% of which fall between _6 and þ1, the range shown by the metasediments. However, the North Patagonian massif also contains some more juvenile PermianeCarboniferous components not seen in the metasediments, so that this may not be the primary or unique source. These granites are considered to represent the southernmost extension of the Choiyoi igneous province, which contains abundant Permian rhyolites that crop out on the eastern side of the Andes in central Argentina, for which unpublished Hf isotope data yield a very similar range to that of the metasediments. The widespread nature of the Choiyoi volcanic rocks and the predominance of Permian zircon could make this a more favoured source for the detrital grains. Hf isotope data reinforce the uniformity of the provenance of the turbidite detrital zircons and confirm the Choiyoi igneous province and the Permian granitic rocks of the North Patagonian Massif as feasible sources. They further confirm the dominantly crustal origin of the Permian magmas. A source region involving mixing of, for example, crustal materials of Panafrican/Brasiliano and Grenvillian ages, together with a minor ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Antarctic Peninsula Patagonia Argentina Journal of South American Earth Sciences 32 4 485 496 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ANTARCTIC PENINSULA HF ISOTOPES PATAGONIA PERMIAN PROVENANCE ZIRCON https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
ANTARCTIC PENINSULA HF ISOTOPES PATAGONIA PERMIAN PROVENANCE ZIRCON https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Fanning, C. Mark Hervé, Francisco Pankhurst, Robert Rapela, Carlos Washington Kleiman, Laura Elena Yaxley, Greg M. Castillo, Paula Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region |
topic_facet |
ANTARCTIC PENINSULA HF ISOTOPES PATAGONIA PERMIAN PROVENANCE ZIRCON https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Lu-Hf isotope data are presented for dated Permian zircon grains from six samples of the latest Palaeozoic to Jurassic low-grade metasedimentary rocks of western Patagonia and the northern Antarctic Peninsula, as well as from potential source rocks in the North Patagonian Massif. The results for the metasedimentary rocks yield eHf values mostly between _15 and þ4 (130 analyses), with a dominant range (more than 85%) of _6 to þ1, indicating provenance from Permian magmatic rocks that incorporated continental crust with a significant residence time. Other zircon grains record more negative eHf values indicating derivation from yet more mature crustal sources. Permian subvolcanic granites in the North Patagonian massif appear to be the closest large source area and dated zircon grains from eight samples of these granites yield initial of eHf values of _12 to þ4 (45 measurements), 84% of which fall between _6 and þ1, the range shown by the metasediments. However, the North Patagonian massif also contains some more juvenile PermianeCarboniferous components not seen in the metasediments, so that this may not be the primary or unique source. These granites are considered to represent the southernmost extension of the Choiyoi igneous province, which contains abundant Permian rhyolites that crop out on the eastern side of the Andes in central Argentina, for which unpublished Hf isotope data yield a very similar range to that of the metasediments. The widespread nature of the Choiyoi volcanic rocks and the predominance of Permian zircon could make this a more favoured source for the detrital grains. Hf isotope data reinforce the uniformity of the provenance of the turbidite detrital zircons and confirm the Choiyoi igneous province and the Permian granitic rocks of the North Patagonian Massif as feasible sources. They further confirm the dominantly crustal origin of the Permian magmas. A source region involving mixing of, for example, crustal materials of Panafrican/Brasiliano and Grenvillian ages, together with a minor ... |
format |
Article in Journal/Newspaper |
author |
Fanning, C. Mark Hervé, Francisco Pankhurst, Robert Rapela, Carlos Washington Kleiman, Laura Elena Yaxley, Greg M. Castillo, Paula |
author_facet |
Fanning, C. Mark Hervé, Francisco Pankhurst, Robert Rapela, Carlos Washington Kleiman, Laura Elena Yaxley, Greg M. Castillo, Paula |
author_sort |
Fanning, C. Mark |
title |
Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region |
title_short |
Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region |
title_full |
Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region |
title_fullStr |
Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region |
title_full_unstemmed |
Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region |
title_sort |
lu-hf isotope evidence for the provenance of permian detritus in accretionary complexes of western patagonia and the northern antarctic peninsula region |
publisher |
Pergamon-Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/196386 |
geographic |
Antarctic Antarctic Peninsula Patagonia Argentina |
geographic_facet |
Antarctic Antarctic Peninsula Patagonia Argentina |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0895981111000319 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2011.03.007 http://hdl.handle.net/11336/196386 Fanning, C. Mark; Hervé, Francisco; Pankhurst, Robert; Rapela, Carlos Washington; Kleiman, Laura Elena; et al.; Lu-Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 32; 4; 1-2011; 485-496 0895-9811 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.jsames.2011.03.007 |
container_title |
Journal of South American Earth Sciences |
container_volume |
32 |
container_issue |
4 |
container_start_page |
485 |
op_container_end_page |
496 |
_version_ |
1779310214980304896 |