Foraminiferal and bulk sediment geochemistry, faunal indexes, and quartz luminescence data from core CDH-89 (western equatorial Atlantic) for the penultimate deglaciation

We apply a multi-proxy approach to marine sediment core CDH-89 to assess paleoclimate changes in Northeastern Brazil (NEB) and in the western equatorial Atlantic (WEA) during the penultimate deglaciation. WEA bottom water ventilation was reconstructed through two independent proxies: bulk sediment m...

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Bibliographic Details
Main Authors: de Carvalho Campos, Marília, Chiessi, Cristiano Mazur, Nascimento, Rodrigo Azevedo, Kraft, Laura, Radionovskaya, Svetlana, Skinner, Luke C, Dias, Bruna Borba, Pinho, Tainã Marcos Lima, Kochhann, Marcus, Crivellari, Stefano, Mineli, Thays D, Mendes, Vinícius Ribau, Baker, Paul A, Cleverson, Silva G, Sawakuchi, André Oliveira
Format: Other/Unknown Material
Language:English
Published: PANGAEA
Subjects:
bottom ventilation
Bulk Sediment
CDH-89
Core
Foraminifera
northeastern Brazil
penultimate deglaciation
precipitation
Sea surface temperature
western equatorial Atlantic
Planktonic foraminifera
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.967528
Description
Summary:We apply a multi-proxy approach to marine sediment core CDH-89 to assess paleoclimate changes in Northeastern Brazil (NEB) and in the western equatorial Atlantic (WEA) during the penultimate deglaciation. WEA bottom water ventilation was reconstructed through two independent proxies: bulk sediment manganese (Mn) content and benthic foraminifera Cibicidoides wuellerstorfi stable carbon isotopic composition. We derived WEA sea surface temperature based on planktonic foraminifera Globigerinoides ruber (white) sensu stricto Mg/Ca. Finally, we reconstructed NEB hydroclimate using two further independent proxies: ln(Ti/Ca) in bulk sediment and quartz luminescence sensitivity calculated through the intensities of the first second of the optically stimulated luminescence (OSL) decay curve and of the 110°C thermoluminescence (TL) peak. Additionally, we applied surface primary productivity and fragmentation indexes in planktonic foraminifera assemblage.

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