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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The Birth of a Connected South Atlantic Ocean: A Magnetostratigraphic Perspective

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Palcu, V, Dan ; Muraszko, Joy R. [1, 2] ; Jaqueto, Plinio F. [3] ; Jovane, Luigi [1]
Total Authors: 4
[1] Palcu, Dan, V, Univ Sao Paulo, Inst Oceenog, Sao Paulo - Brazil
[2] Peking Univ, Sch Earth & Space Sci, Lab Orogen Belts & Crustal Evolut, Beijing - Peoples R China
[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Frontiers in Earth Science; v. 8, SEP 18 2020.
Web of Science Citations: 0

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 Sao 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. (AU)

FAPESP's process: 18/17061-6 - Relationship between environment and magnetotactic bacteria
Grantee:Luigi Jovane
Support type: Research Program on Global Climate Change - Regular Grants
FAPESP's process: 16/24946-9 - Sea-level changes and Global Monsoon System: clues from marine cores in Brazil
Grantee:Luigi Jovane
Support type: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 18/20733-6 - A paleomagnetic component for a proxy of water stratification and anoxia in the sedimentary archives of oceans and epicontinental seas
Grantee:Dan Valentin Palcu
Support type: Scholarships in Brazil - Post-Doctorate