Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica)
We present a full characterization of a 20 cm-thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, in the Ross Sea, Antarctica. Tephra bedforms, mineral paragenesis, and major- and trace-element comp...
Published in: | Geochemistry, Geophysics, Geosystems |
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Online Access: | http://hdl.handle.net/11391/1500533 https://doi.org/10.1029/2021GC009739 |
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ftuniperugiairis:oai:research.unipg.it:11391/1500533 2024-02-11T09:57:03+01:00 Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) Di Roberto A. Scateni B. Di Vincenzo G. Petrelli M. Fisauli G. Barker S. J. Del Carlo P. Colleoni F. Kulhanek D. K. McKay R. De Santis L. The I. Di Roberto, A. Scateni, B. Di Vincenzo, G. Petrelli, M. Fisauli, G. Barker, S. J. Del Carlo, P. Colleoni, F. Kulhanek, D. K. Mckay, R. De Santis, L. The, I. 2021 ELETTRONICO http://hdl.handle.net/11391/1500533 https://doi.org/10.1029/2021GC009739 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000691021600010 volume:22 issue:8 journal:GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS http://hdl.handle.net/11391/1500533 doi:10.1029/2021GC009739 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85113784259 Antarctica Expedition 374IODP marine tephra Ross Sea tephrochronology info:eu-repo/semantics/article 2021 ftuniperugiairis https://doi.org/10.1029/2021GC009739 2024-01-24T18:03:36Z We present a full characterization of a 20 cm-thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, in the Ross Sea, Antarctica. Tephra bedforms, mineral paragenesis, and major- and trace-element composition on individual glass shards were investigated and the tephra age was constrained by 40Ar-39Ar on sanidine crystals. The 40Ar-39Ar data indicate that sanidine grains are variably contaminated by excess Ar, with the best age estimate of 1.282±0.012Ma, based on both single-grain total fusion analyses and step-heating experiments on multi-grain aliquots. The tephra is characterized by a very homogeneous rhyolitic composition and a peculiar mineral assemblage, dominated by sanidine, quartz, and minor aenigmatite and arfvedsonite-riebeckite amphiboles. The tephra from Site U1524 compositionally matches with a ca. 1.3Ma, rhyolitic pumice fall deposit on the rim of the Chang Peak volcano summit caldera, in the Marie Byrd Land, located ca. 1,300km from Site U1524. This contribution offers important volcanological data on the eruptive history of Chang Peak volcano and adds a new tephrochronologic marker for the dating, correlation, and synchronization of marine and continental early Pleistocene records of West Antarctica. Article in Journal/Newspaper Antarc* Antarctica Marie Byrd Land Ross Sea West Antarctica IRIS Università degli Studi di Perugia Ross Sea West Antarctica Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Chang Peak ENVELOPE(-126.633,-126.633,-77.067,-77.067) Geochemistry, Geophysics, Geosystems 22 8 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Perugia |
op_collection_id |
ftuniperugiairis |
language |
English |
topic |
Antarctica Expedition 374IODP marine tephra Ross Sea tephrochronology |
spellingShingle |
Antarctica Expedition 374IODP marine tephra Ross Sea tephrochronology Di Roberto A. Scateni B. Di Vincenzo G. Petrelli M. Fisauli G. Barker S. J. Del Carlo P. Colleoni F. Kulhanek D. K. McKay R. De Santis L. The I. Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) |
topic_facet |
Antarctica Expedition 374IODP marine tephra Ross Sea tephrochronology |
description |
We present a full characterization of a 20 cm-thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, in the Ross Sea, Antarctica. Tephra bedforms, mineral paragenesis, and major- and trace-element composition on individual glass shards were investigated and the tephra age was constrained by 40Ar-39Ar on sanidine crystals. The 40Ar-39Ar data indicate that sanidine grains are variably contaminated by excess Ar, with the best age estimate of 1.282±0.012Ma, based on both single-grain total fusion analyses and step-heating experiments on multi-grain aliquots. The tephra is characterized by a very homogeneous rhyolitic composition and a peculiar mineral assemblage, dominated by sanidine, quartz, and minor aenigmatite and arfvedsonite-riebeckite amphiboles. The tephra from Site U1524 compositionally matches with a ca. 1.3Ma, rhyolitic pumice fall deposit on the rim of the Chang Peak volcano summit caldera, in the Marie Byrd Land, located ca. 1,300km from Site U1524. This contribution offers important volcanological data on the eruptive history of Chang Peak volcano and adds a new tephrochronologic marker for the dating, correlation, and synchronization of marine and continental early Pleistocene records of West Antarctica. |
author2 |
Di Roberto, A. Scateni, B. Di Vincenzo, G. Petrelli, M. Fisauli, G. Barker, S. J. Del Carlo, P. Colleoni, F. Kulhanek, D. K. Mckay, R. De Santis, L. The, I. |
format |
Article in Journal/Newspaper |
author |
Di Roberto A. Scateni B. Di Vincenzo G. Petrelli M. Fisauli G. Barker S. J. Del Carlo P. Colleoni F. Kulhanek D. K. McKay R. De Santis L. The I. |
author_facet |
Di Roberto A. Scateni B. Di Vincenzo G. Petrelli M. Fisauli G. Barker S. J. Del Carlo P. Colleoni F. Kulhanek D. K. McKay R. De Santis L. The I. |
author_sort |
Di Roberto A. |
title |
Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) |
title_short |
Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) |
title_full |
Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) |
title_fullStr |
Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) |
title_full_unstemmed |
Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) |
title_sort |
tephrochronology and provenance of an early pleistocene (calabrian) tephra from iodp expedition 374 site u1524, ross sea (antarctica) |
publishDate |
2021 |
url |
http://hdl.handle.net/11391/1500533 https://doi.org/10.1029/2021GC009739 |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-126.633,-126.633,-77.067,-77.067) |
geographic |
Ross Sea West Antarctica Byrd Marie Byrd Land Chang Peak |
geographic_facet |
Ross Sea West Antarctica Byrd Marie Byrd Land Chang Peak |
genre |
Antarc* Antarctica Marie Byrd Land Ross Sea West Antarctica |
genre_facet |
Antarc* Antarctica Marie Byrd Land Ross Sea West Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000691021600010 volume:22 issue:8 journal:GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS http://hdl.handle.net/11391/1500533 doi:10.1029/2021GC009739 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85113784259 |
op_doi |
https://doi.org/10.1029/2021GC009739 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
22 |
container_issue |
8 |
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1790608127038586880 |