| Summary: | This dataset contains element to calcium ratios (Mg/Ca, Sr/Ca, Mn/Ca, Fe/Ca, Ba/Ca and Al/Ca in mmol/mol) obtained from gravity core GeoB9512-5 (Mulitza et al., 2005). Data is presented for 144 samples Uvigerina mediterranea (87 samples), Uvigerina peregrina (1 sample), Melonis barleeanus (40 samples) and Globobulima turgida (16 samples). 8 duplicate samples (indicated in column "Duplicates"). Some other duplicate samples were picked to represent different test sizes (comment on size in column "Comments") and were picked and crushed separately. The microfossil material came from fresh mud, washed through a 63 µm sieve using deionized water, dried at 45°C for less than 24 hours, and dry sieved. The benthic foraminifera used, were retrieved from the fraction >150 µm. Between 1 and 9 tests of U. mediterranea, 3 and 12 specimens for M. barleeanus and between 4 and 12 individuals of Globobulimina were used for analyses. Before analysis, foraminifera samples were crushed and cleaned with water, methanol and hot buffered hydrogen peroxide with no reductive cleaning step (Johnstone et al., 2016). Samples were measured using an Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES)—Agilent Technologies 700 Series with Cetac ASX-520 autosampler at the following spectral lines: Ca (315.9 nm), Mg (279.6 nm), Sr (421.6), Fe (238.2 nm), and Mn (257.6 nm), Ba (455.4 nm) and Al (167.0 nm) calibrated using linear regressions. Calibration standards consisted of a blank and five multi-element standards of between 20 and 100 ppm Ca. Instrumental precision was monitored by using a commercial multi-element standard solution (SCP, France), and commercial powder sample ECRM752-1. Theoretical value (measured value, σ standard deviation, standard error) in mmol/mol for the SCP standard during these runs were: Mg/Ca, 2.955 (2.959, 0.030, 0.0029), Sr/Ca, 1.402 (1.402, 0. 016, 0.0015), Mn/Ca 0.3234 (0.3291, σ 0.0019, 0.00019), Fe/Ca, 0.3312 (0.3228, σ 0.0034, 0.00033), Ba/Ca, 0.00832 (0.00840, σ 0.00034, 0.000033) and ...
|
|---|