Radiocarbon measurements on foraminifera from sediment cores in the North Atlantic (NERC Grant NE/M004619/1, NE/M003434/1)

Radiocarbon measurements on planktic and benthic foraminifera from sediment cores in the North Atlantic: Ocean Drilling Program (ODP) 983, SU90-44, MD04-2829, MD01-2461, and EW9302-2JPC Site 983 is located on the Bjorn Drift in approximately 1650 m water depth on the eastern flank of the Reykjanes Ridge. Hole 983A Position: 60°24.200'N, 23°38.437'W. Sediment core SU90-44 collected from the north-eastern Atlantic basin, near the top of a small abyssal hill, southeast of the Rockall plateau, 50°01'N, 17°06'W, 4279 m. Sediment core MD04-2829 collected from Rosemary Bank in the Northern Rockall Trough 58º 56.93’ N; 09º 34.30’ W; 1743 m water depth. Sediment core MD01-2461 was collected from the north-western flank of the Porcupine Seabight approximately 550 km to the southwest, 51°45’N, 12°55’W; 1153 m water depth, recovered in 2001. Core EW9302-2JPC recovered from the Rockall Plateau and East Flank of Reykjanes Ridge from the Flemish Cap in the south- eastern Labrador Sea, 48°47.70′N, 45°05.09′W, taken at water depth 1251m.

Date (Creation): 2023-03-01

Identifier: http://data.bgs.ac.uk/id/dataHolding/13608047

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University of St Andrews - Andrea Burke

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British Geological Survey - Enquiries

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Geology

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NGDC Deposited Data

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NGDC Deposited Data

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NERC_DDC

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Metadata language: EnglishEnglish

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Geoscientific information

Begin date: 2015-05-04

End date: 2020-09-30

Unique resource identifier: WGS 84 (EPSG::4326)

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Conformance result

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

Date (Publication): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: No

Statement: Pre-treatment of the foraminifera specimens followed the approach by Nadeau et al. (2001). Sample was transferred into a septum sealed vial. Then 200 microlitre of a 15% hydrogen peroxide (H2O2) solution was added and the tube placed in an ultra-sonic bath for ~3min to remove organic surface contaminants and to provide a mild leach of the foraminifera material. Subsequently, hydrogen peroxide was decanted using a fine syringe and rinsed repeatedly in Milli-Q water. While still damp the samples were evacuated and 1 ml of 85% phosphoric acid was added to hydrolyse the samples to CO2 at 70°C until complete dissolution. Samples were then converted into graphite on a Fe catalyst using the hydrogen reduction method (Vogel et al., 1987) for AMS analysis at the Queens University Belfast AMS facility.