Publication Date:
2023-03-30
Description:
Stable carbon (δ13C) and oxygen isotope (δ18O) and Mg/Ca-measurements were performed on the planktonic subsurface-dwelling foraminiferal species Globorotalia truncatulinoides. The foraminiferal specimens were selected from piston core M78/1-235-1, which was recovered from Tobago Basin (11°36.53'N 60°57.86'W) from 852 m water depth during R/V Meteor Cruise 78/1. Sampling and analytical studies were carried out from 630 to 800 cm core depth at 1-2 cm spatial resolution. This dataset extends the existing subsurface proxy records (Reißig et al., 2019; doi:10.1594/PANGAEA.897083) further back in time, now focusing on the time period of the latest fully developed D/O events (~30-37 ka BP). The isotope analyses were performed in 2019 on a Thermo Scientific MAT 253 mass spectrometer with an automated Kiel IV Carbonate Preparation Device. Trace metal analyses were performed on a VARIAN 720-ES Axial ICP-OES, a simultaneous, axial-viewing Inductively Coupled Plasma - Optical Emission Spectrometer coupled to a VARIAN SPS3 sample preparation system. The proxy data provide information on the Tobago Basin subsurface hydrography in relation to Western Boundary Current and North Atlantic Subtropical Gyre interdynamics.
Keywords:
235-1; AGE; DEPTH, sediment/rock; Globorotalia truncatulinoides, Aluminium/Calcium ratio; Globorotalia truncatulinoides, Iron/Calcium ratio; Globorotalia truncatulinoides, Magnesium/Calcium ratio; Globorotalia truncatulinoides, Manganese/Calcium ratio; Globorotalia truncatulinoides, δ13C; Globorotalia truncatulinoides, δ18O; M78/1; M78/1_235-1; Mass spectrometer, Finnigan, MAT 253; coupled with Carbonate preparation device, Finnigan, KIEL IV; Meteor (1986); N. Tobago; PC; Piston corer; Reference of data; Sedimentation rate; Sub-surface temperature; δ18O, seawater, reconstructed
Type:
Dataset
Format:
text/tab-separated-values, 4588 data points
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