Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg
The early Paleogene sedimentary record of the Sao Paulo Plateau holds the key to understanding the timing and mechanisms of the onset of Atlantic oceanic circulation, with implications for ocean – climate feedback systems. The timing and evolution of South Atlantic Ocean connectivity remain poorly u...
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ftfrontimediafig:oai:figshare.com:article/12974744 2023-05-15T18:20:58+02:00 Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg Dan V. Palcu Joy R. Muraszko Plinio F. Jaqueto Luigi Jovane 2020-09-18T15:01:44Z https://doi.org/10.3389/feart.2020.00375.s001 https://figshare.com/articles/figure/Image_1_The_Birth_of_a_Connected_South_Atlantic_Ocean_A_Magnetostratigraphic_Perspective_jpg/12974744 unknown doi:10.3389/feart.2020.00375.s001 https://figshare.com/articles/figure/Image_1_The_Birth_of_a_Connected_South_Atlantic_Ocean_A_Magnetostratigraphic_Perspective_jpg/12974744 Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change São Paulo Plateau paleocirculation Danian Selandian Rio Grande Rise Walvis Ridge Paleogene hyperthermals Image Figure 2020 ftfrontimediafig https://doi.org/10.3389/feart.2020.00375.s001 2020-09-23T22:55:31Z The early Paleogene sedimentary record of the Sao Paulo Plateau holds the key to understanding the timing and mechanisms of the onset of Atlantic oceanic circulation, with implications for ocean – climate feedback systems. The timing and evolution of South Atlantic Ocean connectivity remain poorly understood, hindering a full understanding of modern circulation mechanisms. In this work, we develop an improved magnetostratigraphic age model for the late- Cretaceous to Eocene sedimentary record of Deep-Sea Drilling Project (DSDP) Site 356, located on the São Paulo Plateau at the edge of the Rio Grande Rise. The model constrains the timing of the beginning of Atlantic Ocean circulation, as the last obstacle to a connected Atlantic was removed. We use the age model to quantify sedimentary rates, and correlate with rock magnetic and published geochemical data to explore links between ocean current rearrangement and climatic anomalies. We find that periods characterized by variations in the magnetic properties of sediments and sedimentation anomalies in the Sao Paulo Plateau are reflected in carbon isotope events, supporting a possible link between ocean circulation and hyperthermal events. Still Image South Atlantic Ocean Frontiers: Figshare |
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Frontiers: Figshare |
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ftfrontimediafig |
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unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change São Paulo Plateau paleocirculation Danian Selandian Rio Grande Rise Walvis Ridge Paleogene hyperthermals |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change São Paulo Plateau paleocirculation Danian Selandian Rio Grande Rise Walvis Ridge Paleogene hyperthermals Dan V. Palcu Joy R. Muraszko Plinio F. Jaqueto Luigi Jovane Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change São Paulo Plateau paleocirculation Danian Selandian Rio Grande Rise Walvis Ridge Paleogene hyperthermals |
description |
The early Paleogene sedimentary record of the Sao Paulo Plateau holds the key to understanding the timing and mechanisms of the onset of Atlantic oceanic circulation, with implications for ocean – climate feedback systems. The timing and evolution of South Atlantic Ocean connectivity remain poorly understood, hindering a full understanding of modern circulation mechanisms. In this work, we develop an improved magnetostratigraphic age model for the late- Cretaceous to Eocene sedimentary record of Deep-Sea Drilling Project (DSDP) Site 356, located on the São Paulo Plateau at the edge of the Rio Grande Rise. The model constrains the timing of the beginning of Atlantic Ocean circulation, as the last obstacle to a connected Atlantic was removed. We use the age model to quantify sedimentary rates, and correlate with rock magnetic and published geochemical data to explore links between ocean current rearrangement and climatic anomalies. We find that periods characterized by variations in the magnetic properties of sediments and sedimentation anomalies in the Sao Paulo Plateau are reflected in carbon isotope events, supporting a possible link between ocean circulation and hyperthermal events. |
format |
Still Image |
author |
Dan V. Palcu Joy R. Muraszko Plinio F. Jaqueto Luigi Jovane |
author_facet |
Dan V. Palcu Joy R. Muraszko Plinio F. Jaqueto Luigi Jovane |
author_sort |
Dan V. Palcu |
title |
Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg |
title_short |
Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg |
title_full |
Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg |
title_fullStr |
Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg |
title_full_unstemmed |
Image_1_The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective.jpg |
title_sort |
image_1_the birth of a connected south atlantic ocean: a magnetostratigraphic perspective.jpg |
publishDate |
2020 |
url |
https://doi.org/10.3389/feart.2020.00375.s001 https://figshare.com/articles/figure/Image_1_The_Birth_of_a_Connected_South_Atlantic_Ocean_A_Magnetostratigraphic_Perspective_jpg/12974744 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
doi:10.3389/feart.2020.00375.s001 https://figshare.com/articles/figure/Image_1_The_Birth_of_a_Connected_South_Atlantic_Ocean_A_Magnetostratigraphic_Perspective_jpg/12974744 |
op_doi |
https://doi.org/10.3389/feart.2020.00375.s001 |
_version_ |
1766199946182131712 |