Concentration of Trace Metals in sediment collected from the Sabrina Coast Continental Slope - core C012-PC05

• Other Authors: AADC (originator), AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: geoscientificInformation; oceans; SEDIMENT COMPOSITION; EARTH SCIENCE; MARINE SEDIMENTS; TRACE ELEMENTS; OCEAN CHEMISTRY; ICP-MS > Inductively Coupled Plasma Mass Spectrometer; LABORATORY; AMD; AMD/AU; CEOS; GEOGRAPHIC REGION > POLAR; CONTINENT > ANTARCTICA; OCEAN > SOUTHERN OCEAN > SABRINA COAST CONTINENTAL SLOPE; Antarctic; Sabrina Coast; Southern Ocean; Antarc*; Antarctica
• Online Access: https://researchdata.edu.au/concentration-trace-metals-c012-pc05/1463606; https://data.aad.gov.au/metadata/records/AAS_4419_IN2017-V01-C012-PC05-TraceMetals; https://data.aad.gov.au/eds/5133/download; https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4419; https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4419_IN2017-V01-C012-PC05-TraceMetals

Data quality and control were monitored by repeat measurement of the Chile sediment RR9702-42MC8 (detrital-rich) and KN7812-12BC 0-6cm SO (opal-rich) sediment standards. The samples were processed in two batches, each containing one sediment standard and one procedural blank for 22 samples. The procedural blanks were negligible (less than 1.1% of standard values). A third sample batch (n=4) was measured to analyse samples 2.9-2.91, 5.6-5.61, and 9.7-9.71; and provide duplicate analysis of sample 11.6-11.61. Trace metal concentrations are reported in micrograms per gram of sediment in core C012-PC05 (64⁰ 40.517’ S, 119⁰ 18.072’ E, water depth 3104 m). Each sediment sample (100-200mg) was ground using a pestle and mortar and digested following an initial oxidation step (1:1 mixture of H2O2 and HNO3 acid) and open vessel acid on a 150 degree C hotplate using 2:5:1 mixture of concentrated distilled HCl, HNO3 and Baseline Seastar HF acid. After converting the digested sample to nitric acid, an additional oxidation step was performed with 1:1 mixture of concentrated distilled HNO3 and Baseline Seastar HClO4 acid. A 10% aliquot of the final digestion was sub-sampled for trace metal analyses. Trace metal concentrations were determined by external calibration using an ELEMENT 2 sector field ICP-MS from Thermo Fisher Scientific (Bremen, Germany) at Central Science Laboratory (University of Tasmania). The following elements were analysed in either low (LR) or medium resolution (MR): Sr88(LR), Y89(LR), Mo95(LR), Ag107(LR), Cd111(LR), Cs133(LR), Ba137(LR), Nd146(LR), Tm169(LR), Yb171(LR), Tl205(LR), Pb208(LR), Th232(LR), U238(LR), Na23(MR), Mg24(MR), Al27(MR), P31(MR), S32(MR), Ca42(MR), Sc45(MR), Ti47(MR), V51(MR), Cr52(MR), Mn55(MR), Fe56(MR), Co59(MR), Ni60(MR), Cu63(MR), Zn66(MR). The sediment geochemistry can be used to reconstruct changes in environmental conditions along the East Antarctic margin of the Southern Ocean.