U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula
The spectacular fossil plant assemblage preserved in the non-marine Mount Flora Formation of the northern Antarctic Peninsula represents the diverse Jurassic flora that once covered the Gondwanan continents at high paleolatitudes. The depositional facies of the formation plays a key role in the tect...
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ftconicet:oai:ri.conicet.gov.ar:11336/175416 2023-10-09T21:46:04+02:00 U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula Scasso, Roberto Adrian Ramezani, Jahandar Escapa, Ignacio Hernán Elgorriaga, Andrés Capelli, Ignacio Andrés application/pdf application/zip http://hdl.handle.net/11336/175416 eng eng Springer info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00531-021-02155-0 info:eu-repo/semantics/altIdentifier/doi/10.1007/s00531-021-02155-0 http://hdl.handle.net/11336/175416 Scasso, Roberto Adrian; Ramezani, Jahandar; Escapa, Ignacio Hernán; Elgorriaga, Andrés; Capelli, Ignacio Andrés; U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula; Springer; International Journal of Earth Sciences; 111; 3; 11-1-2022; 891-904 1437-3254 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ANTARCTIC PENINSULA CALLOVIAN FLORA HOPE BAY JURASSIC MOUNT FLORA PALAEOGEOGRAPHY STRATIGRAPHY U–PB GEOCHRONOLOGY VOLCANISM 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/10.1007/s00531-021-02155-0 2023-09-24T20:22:33Z The spectacular fossil plant assemblage preserved in the non-marine Mount Flora Formation of the northern Antarctic Peninsula represents the diverse Jurassic flora that once covered the Gondwanan continents at high paleolatitudes. The depositional facies of the formation plays a key role in the tectonic interpretations and basin evolution models that attempt to reconcile large igneous province magmatism, continental break up, and magmatic arc development throughout the Jurassic and Cretaceous. Limited U–Pb in situ geochronology reported from the Mount Flora Formation and adjacent units lack the necessary resolution to overcome ambiguous correlations and biostratigraphic discrepancies. We present two high-precision U–Pb zircon ages (CA-ID-TIMS method) from a distinct tuffaceous interval of the Mount Flora Formation at Hope Bay, which document a terminal Middle Jurassic age (Callovian Stage) for the formation and its paleoflora. In excess of 1400 new collected fossil plant specimens exhibit a highly diverse Jurassic plant association that dominated the Antarctic Peninsula nearly 17 million years after its disappearance from northern Patagonia. This suggests similar paleoecological conditions were established diachronously throughout basins of southern Gondwana, possibly facilitating floral migrations in response to local climate change. The depositional facies of the Mount Flora Formation, its age proximity to the marine Nordenskjöld Formation in the Antarctic Larsen Basin and its coincidence with a regional unconformity in the northern Patagonia point out to a complex interplay among magmatic arc development, tectonic extension and continental break up that dominated the geologic and paleoenvironmental evolution of southern Gondwana near the end of the Middle Jurassic. Fil: Scasso, Roberto Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula Patagonia Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) Nordenskjöld ENVELOPE(-60.583,-60.583,-64.667,-64.667) Larsen Basin ENVELOPE(-60.000,-60.000,-68.000,-68.000) Mount Flora ENVELOPE(-57.008,-57.008,-63.417,-63.417) International Journal of Earth Sciences 111 3 891 904 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ANTARCTIC PENINSULA CALLOVIAN FLORA HOPE BAY JURASSIC MOUNT FLORA PALAEOGEOGRAPHY STRATIGRAPHY U–PB GEOCHRONOLOGY VOLCANISM https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
ANTARCTIC PENINSULA CALLOVIAN FLORA HOPE BAY JURASSIC MOUNT FLORA PALAEOGEOGRAPHY STRATIGRAPHY U–PB GEOCHRONOLOGY VOLCANISM https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Scasso, Roberto Adrian Ramezani, Jahandar Escapa, Ignacio Hernán Elgorriaga, Andrés Capelli, Ignacio Andrés U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula |
topic_facet |
ANTARCTIC PENINSULA CALLOVIAN FLORA HOPE BAY JURASSIC MOUNT FLORA PALAEOGEOGRAPHY STRATIGRAPHY U–PB GEOCHRONOLOGY VOLCANISM https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The spectacular fossil plant assemblage preserved in the non-marine Mount Flora Formation of the northern Antarctic Peninsula represents the diverse Jurassic flora that once covered the Gondwanan continents at high paleolatitudes. The depositional facies of the formation plays a key role in the tectonic interpretations and basin evolution models that attempt to reconcile large igneous province magmatism, continental break up, and magmatic arc development throughout the Jurassic and Cretaceous. Limited U–Pb in situ geochronology reported from the Mount Flora Formation and adjacent units lack the necessary resolution to overcome ambiguous correlations and biostratigraphic discrepancies. We present two high-precision U–Pb zircon ages (CA-ID-TIMS method) from a distinct tuffaceous interval of the Mount Flora Formation at Hope Bay, which document a terminal Middle Jurassic age (Callovian Stage) for the formation and its paleoflora. In excess of 1400 new collected fossil plant specimens exhibit a highly diverse Jurassic plant association that dominated the Antarctic Peninsula nearly 17 million years after its disappearance from northern Patagonia. This suggests similar paleoecological conditions were established diachronously throughout basins of southern Gondwana, possibly facilitating floral migrations in response to local climate change. The depositional facies of the Mount Flora Formation, its age proximity to the marine Nordenskjöld Formation in the Antarctic Larsen Basin and its coincidence with a regional unconformity in the northern Patagonia point out to a complex interplay among magmatic arc development, tectonic extension and continental break up that dominated the geologic and paleoenvironmental evolution of southern Gondwana near the end of the Middle Jurassic. Fil: Scasso, Roberto Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos ... |
format |
Article in Journal/Newspaper |
author |
Scasso, Roberto Adrian Ramezani, Jahandar Escapa, Ignacio Hernán Elgorriaga, Andrés Capelli, Ignacio Andrés |
author_facet |
Scasso, Roberto Adrian Ramezani, Jahandar Escapa, Ignacio Hernán Elgorriaga, Andrés Capelli, Ignacio Andrés |
author_sort |
Scasso, Roberto Adrian |
title |
U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula |
title_short |
U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula |
title_full |
U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula |
title_fullStr |
U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula |
title_full_unstemmed |
U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula |
title_sort |
u-pb age constraints on the jurassic succession and paleoflora of mount flora, antarctic peninsula |
publisher |
Springer |
url |
http://hdl.handle.net/11336/175416 |
long_lat |
ENVELOPE(-57.038,-57.038,-63.403,-63.403) ENVELOPE(-60.583,-60.583,-64.667,-64.667) ENVELOPE(-60.000,-60.000,-68.000,-68.000) ENVELOPE(-57.008,-57.008,-63.417,-63.417) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia Hope Bay Nordenskjöld Larsen Basin Mount Flora |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia Hope Bay Nordenskjöld Larsen Basin Mount Flora |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00531-021-02155-0 info:eu-repo/semantics/altIdentifier/doi/10.1007/s00531-021-02155-0 http://hdl.handle.net/11336/175416 Scasso, Roberto Adrian; Ramezani, Jahandar; Escapa, Ignacio Hernán; Elgorriaga, Andrés; Capelli, Ignacio Andrés; U-Pb Age Constraints on the Jurassic Succession and Paleoflora of Mount Flora, Antarctic Peninsula; Springer; International Journal of Earth Sciences; 111; 3; 11-1-2022; 891-904 1437-3254 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s00531-021-02155-0 |
container_title |
International Journal of Earth Sciences |
container_volume |
111 |
container_issue |
3 |
container_start_page |
891 |
op_container_end_page |
904 |
_version_ |
1779321735910260736 |