Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica
New paleomagnetic results from the late Eocene-Middle Miocene samples from Deep Sea Drilling Project Site 274, cored during Leg 28 on the continental rise off Victoria Land, Ross Sea, provide a chronostratigraphic framework for an existing paleoclimate archive during a key period of Antarctic climat...
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ftopenaccessrep:oai:zenodo.org:144298 2024-05-12T07:56:32+00:00 Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica Jovane, Luigi Florindo, Fabio Wilson, Gary de Almeida Pecchiai Saldanha Leone, Stephanie Hassan, Muhammad Bin Rodelli, Daniel Cortese, Giuseppe 2020-12-14 https://www.openaccessrepository.it/record/144298 https://doi.org/10.3389/feart.2020.563453 und unknown url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/144298 doi:10.3389/feart.2020.563453 info:eu-repo/semantics/openAccess General Earth and Planetary Sciences info:eu-repo/semantics/article publication-article 2020 ftopenaccessrep https://doi.org/10.3389/feart.2020.563453 2024-04-17T15:04:22Z New paleomagnetic results from the late Eocene-Middle Miocene samples from Deep Sea Drilling Project Site 274, cored during Leg 28 on the continental rise off Victoria Land, Ross Sea, provide a chronostratigraphic framework for an existing paleoclimate archive during a key period of Antarctic climate and ice sheet evolution. Based on this new age model, the cored late Eocene-Middle Miocene sequence covers an interval of almost 20 Myr (from ∼35 to ∼15 Ma). Biostratigraphic constraints allow a number of possible correlations with the Geomagnetic Polarity Time Scale. Regardless of correlation, average interval sediment accumulation rates above 260 mbsf are ∼6 cm/kyr with the record punctuated by a number of unconformities. Below 260 mbsf (across the Eocene/Oligocene boundary) interval, sedimentation accumulation rates are closer to ∼1 cm/kyr. A major unconformity identified at ∼180 mbsf represents at least 9 Myr accounting for the late Oligocene and Early Miocene and represent non-deposition and/or erosion due to intensification of Antarctic Circumpolar Current activity. Significant fluctuations in grain size and magnetic properties observed above the unconformity at 180 mbsf, in the Early Miocene portion of this sedimentary record, reflect cyclical behavior in glacial advance and retreat from the continent. Similar glacial cyclicity has already been identified in other Miocene sequences recovered in drill cores from the Antarctic margin. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ross Sea Victoria Land Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic Ross Sea The Antarctic Victoria Land Frontiers in Earth Science 8 |
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Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
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ftopenaccessrep |
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unknown |
topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Jovane, Luigi Florindo, Fabio Wilson, Gary de Almeida Pecchiai Saldanha Leone, Stephanie Hassan, Muhammad Bin Rodelli, Daniel Cortese, Giuseppe Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica |
topic_facet |
General Earth and Planetary Sciences |
description |
New paleomagnetic results from the late Eocene-Middle Miocene samples from Deep Sea Drilling Project Site 274, cored during Leg 28 on the continental rise off Victoria Land, Ross Sea, provide a chronostratigraphic framework for an existing paleoclimate archive during a key period of Antarctic climate and ice sheet evolution. Based on this new age model, the cored late Eocene-Middle Miocene sequence covers an interval of almost 20 Myr (from ∼35 to ∼15 Ma). Biostratigraphic constraints allow a number of possible correlations with the Geomagnetic Polarity Time Scale. Regardless of correlation, average interval sediment accumulation rates above 260 mbsf are ∼6 cm/kyr with the record punctuated by a number of unconformities. Below 260 mbsf (across the Eocene/Oligocene boundary) interval, sedimentation accumulation rates are closer to ∼1 cm/kyr. A major unconformity identified at ∼180 mbsf represents at least 9 Myr accounting for the late Oligocene and Early Miocene and represent non-deposition and/or erosion due to intensification of Antarctic Circumpolar Current activity. Significant fluctuations in grain size and magnetic properties observed above the unconformity at 180 mbsf, in the Early Miocene portion of this sedimentary record, reflect cyclical behavior in glacial advance and retreat from the continent. Similar glacial cyclicity has already been identified in other Miocene sequences recovered in drill cores from the Antarctic margin. |
format |
Article in Journal/Newspaper |
author |
Jovane, Luigi Florindo, Fabio Wilson, Gary de Almeida Pecchiai Saldanha Leone, Stephanie Hassan, Muhammad Bin Rodelli, Daniel Cortese, Giuseppe |
author_facet |
Jovane, Luigi Florindo, Fabio Wilson, Gary de Almeida Pecchiai Saldanha Leone, Stephanie Hassan, Muhammad Bin Rodelli, Daniel Cortese, Giuseppe |
author_sort |
Jovane, Luigi |
title |
Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica |
title_short |
Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica |
title_full |
Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica |
title_fullStr |
Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica |
title_full_unstemmed |
Magnetostratigraphic Chronology of a Cenozoic Sequence From DSDP Site 274, Ross Sea, Antarctica |
title_sort |
magnetostratigraphic chronology of a cenozoic sequence from dsdp site 274, ross sea, antarctica |
publishDate |
2020 |
url |
https://www.openaccessrepository.it/record/144298 https://doi.org/10.3389/feart.2020.563453 |
geographic |
Antarctic Ross Sea The Antarctic Victoria Land |
geographic_facet |
Antarctic Ross Sea The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ross Sea Victoria Land |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/144298 doi:10.3389/feart.2020.563453 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/feart.2020.563453 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
_version_ |
1798836657001070592 |