Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica)
Abstract 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‐ele...
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ftdoajarticles:oai:doaj.org/article:84520812396249a8a30c2035817b6ef3 2023-12-03T10:13:52+01:00 Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica) A. Di Roberto B. Scateni G. Di Vincenzo M. Petrelli G. Fisauli S. J. Barker P. Del Carlo F. Colleoni D. K. Kulhanek R. McKay L. De Santis The IODP Expedition 374 Scientific Party 2021-08-01T00:00:00Z https://doi.org/10.1029/2021GC009739 https://doaj.org/article/84520812396249a8a30c2035817b6ef3 EN eng Wiley https://doi.org/10.1029/2021GC009739 https://doaj.org/toc/1525-2027 1525-2027 doi:10.1029/2021GC009739 https://doaj.org/article/84520812396249a8a30c2035817b6ef3 Geochemistry, Geophysics, Geosystems, Vol 22, Iss 8, Pp n/a-n/a (2021) Antarctica Expedition 374IODP marine tephra Ross Sea tephrochronology Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1029/2021GC009739 2023-11-05T01:35:57Z Abstract 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 ± 0.012 Ma, 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. 1.3 Ma, rhyolitic pumice fall deposit on the rim of the Chang Peak volcano summit caldera, in the Marie Byrd Land, located ca. 1,300 km 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 Directory of Open Access Journals: DOAJ Articles Byrd Chang Peak ENVELOPE(-126.633,-126.633,-77.067,-77.067) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Ross Sea West Antarctica Geochemistry, Geophysics, Geosystems 22 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica Expedition 374IODP marine tephra Ross Sea tephrochronology Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 |
spellingShingle |
Antarctica Expedition 374IODP marine tephra Ross Sea tephrochronology Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 A. Di Roberto B. Scateni G. Di Vincenzo M. Petrelli G. Fisauli S. J. Barker P. Del Carlo F. Colleoni D. K. Kulhanek R. McKay L. De Santis The IODP Expedition 374 Scientific Party 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 Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 |
description |
Abstract 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 ± 0.012 Ma, 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. 1.3 Ma, rhyolitic pumice fall deposit on the rim of the Chang Peak volcano summit caldera, in the Marie Byrd Land, located ca. 1,300 km 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. |
format |
Article in Journal/Newspaper |
author |
A. Di Roberto B. Scateni G. Di Vincenzo M. Petrelli G. Fisauli S. J. Barker P. Del Carlo F. Colleoni D. K. Kulhanek R. McKay L. De Santis The IODP Expedition 374 Scientific Party |
author_facet |
A. Di Roberto B. Scateni G. Di Vincenzo M. Petrelli G. Fisauli S. J. Barker P. Del Carlo F. Colleoni D. K. Kulhanek R. McKay L. De Santis The IODP Expedition 374 Scientific Party |
author_sort |
A. Di Roberto |
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) |
publisher |
Wiley |
publishDate |
2021 |
url |
https://doi.org/10.1029/2021GC009739 https://doaj.org/article/84520812396249a8a30c2035817b6ef3 |
long_lat |
ENVELOPE(-126.633,-126.633,-77.067,-77.067) ENVELOPE(-130.000,-130.000,-78.000,-78.000) |
geographic |
Byrd Chang Peak Marie Byrd Land Ross Sea West Antarctica |
geographic_facet |
Byrd Chang Peak Marie Byrd Land Ross Sea West Antarctica |
genre |
Antarc* Antarctica Marie Byrd Land Ross Sea West Antarctica |
genre_facet |
Antarc* Antarctica Marie Byrd Land Ross Sea West Antarctica |
op_source |
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 8, Pp n/a-n/a (2021) |
op_relation |
https://doi.org/10.1029/2021GC009739 https://doaj.org/toc/1525-2027 1525-2027 doi:10.1029/2021GC009739 https://doaj.org/article/84520812396249a8a30c2035817b6ef3 |
op_doi |
https://doi.org/10.1029/2021GC009739 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
22 |
container_issue |
8 |
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1784260822832250880 |