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| Main Authors: | , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2026
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| Online Access: | https://doi.org/10.1594/PANGAEA.992896 |
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| _version_ | 1867171057687855104 |
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| author | Ceccopieri, Milena Lessa, Douglas Villela de Oliveira Albuquerque, Ana Luiza Chiessi, Cristiano Mazur Mollenhauer, Gesine |
| author_facet | Ceccopieri, Milena Lessa, Douglas Villela de Oliveira Albuquerque, Ana Luiza Chiessi, Cristiano Mazur Mollenhauer, Gesine |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This dataset presents radiocarbon and geochemical records from sediment core CF10-09A, collected in the Cabo Frio upwelling system on the southeastern Brazilian continental margin (23.20°S, 41.74°W; 117 m water depth). The data were generated to evaluate radiocarbon age offsets between organic carbon (OC) and carbonate fractions and to support Holocene paleoceanographic reconstructions in a dynamic coastal upwelling environment. Radiocarbon measurements of planktonic foraminifera (Globigerinoides ruber) were obtained using a MICADAS accelerator mass spectrometry system at the Alfred Wegener Institute. The dataset includes conventional radiocarbon ages for both the carbonate and OC fractions, based on the radiocarbon measurements described in Ceccopieri et al. (2016) and Lessa et al. (2016), respectively, as well as the calculated offset between carbonate and OC conventional ages. Conventional ages were extrapolated along the entire core using the tune function of the Astrochron package in R. The revised age model, based on the carbonate fraction, was developed using the Marine20 calibration curve (Heaton et al., 2020) and a regional marine reservoir correction of 67 ± 33 years (Macario et al., 2016). Additional downcore parameters include total organic carbon (TOC), stable carbon isotopic composition of bulk organic matter (δ¹³C), total alkenone, crenarchaeol, and branched GDGT contents, branched and isoprenoid tetraether (BIT) index values, and estimates of terrestrial and marine organic carbon contributions. The dataset spans approximately the last 5.8 thousand calibrated years. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_992896 |
| institution | PANGAEA |
| language | en |
| publishDate | 2026 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Radiocarbon and geochemical data of sediment core CF10-09A, Cabo Frio upwelling system, SE Brazilian margin Ceccopieri, Milena Lessa, Douglas Villela de Oliveira Albuquerque, Ana Luiza Chiessi, Cristiano Mazur Mollenhauer, Gesine Accumulation rate, deposit; Age, 14C calibrated, MARINE20 (Heaton et al., 2020); Age, difference; Age model; Alkenone, per unit mass total organic carbon; Alkenones; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether, per unit mass total organic carbon; Cabo Frio Upwelling, Southwest Atlantic; Calculated; Calculated according to Hopmans et al. (2004); Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; Carbon, organic, total; CF10-09A; Contribution; Crenarchaeol, per unit mass total organic carbon; DEPTH, sediment/rock; Foraminifera; GC; GDGTs; Geochronology; Gravity corer; interpolated; Organic carbon; δ13C, organic matter This dataset presents radiocarbon and geochemical records from sediment core CF10-09A, collected in the Cabo Frio upwelling system on the southeastern Brazilian continental margin (23.20°S, 41.74°W; 117 m water depth). The data were generated to evaluate radiocarbon age offsets between organic carbon (OC) and carbonate fractions and to support Holocene paleoceanographic reconstructions in a dynamic coastal upwelling environment. Radiocarbon measurements of planktonic foraminifera (Globigerinoides ruber) were obtained using a MICADAS accelerator mass spectrometry system at the Alfred Wegener Institute. The dataset includes conventional radiocarbon ages for both the carbonate and OC fractions, based on the radiocarbon measurements described in Ceccopieri et al. (2016) and Lessa et al. (2016), respectively, as well as the calculated offset between carbonate and OC conventional ages. Conventional ages were extrapolated along the entire core using the tune function of the Astrochron package in R. The revised age model, based on the carbonate fraction, was developed using the Marine20 calibration curve (Heaton et al., 2020) and a regional marine reservoir correction of 67 ± 33 years (Macario et al., 2016). Additional downcore parameters include total organic carbon (TOC), stable carbon isotopic composition of bulk organic matter (δ¹³C), total alkenone, crenarchaeol, and branched GDGT contents, branched and isoprenoid tetraether (BIT) index values, and estimates of terrestrial and marine organic carbon contributions. The dataset spans approximately the last 5.8 thousand calibrated years. |
| title | Radiocarbon and geochemical data of sediment core CF10-09A, Cabo Frio upwelling system, SE Brazilian margin |
| topic | Accumulation rate, deposit; Age, 14C calibrated, MARINE20 (Heaton et al., 2020); Age, difference; Age model; Alkenone, per unit mass total organic carbon; Alkenones; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether, per unit mass total organic carbon; Cabo Frio Upwelling, Southwest Atlantic; Calculated; Calculated according to Hopmans et al. (2004); Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; Carbon, organic, total; CF10-09A; Contribution; Crenarchaeol, per unit mass total organic carbon; DEPTH, sediment/rock; Foraminifera; GC; GDGTs; Geochronology; Gravity corer; interpolated; Organic carbon; δ13C, organic matter |
| url | https://doi.org/10.1594/PANGAEA.992896 |