Compound-specific 14C isotope composition in marine and terrestrial sedimentary archives from sub-Antarctic South Georgia ...

• Main Authors: Berg, Sonja, Kusch, Stephanie, Jivcov, Sandra
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: compound-specific radiocarbon analysis; Fjord; lake; peat; sediments; South Georgia; Event label; Cruise/expedition; Area/locality; Site; LATITUDE; LONGITUDE; ELEVATION; Depth, bathymetric; DATE/TIME; Core; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Sample ID; Age, dated material; Fraction modern carbon; Fraction modern carbon, error; Age, dated; Age, dated standard deviation; Age, comment; Sample mass; Reference/source; Uniform resource locator/link to reference; Reference of data; Piston corer, UWITEC; Russian peat corer and gravity corer; Gravity corer; see comment; MICADAS Accelerator Mass Spectrometer; Age, 14C AMS; ANT-XXIX/4; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.967398; https://doi.pangaea.de/10.1594/PANGAEA.967398

The dataset comprises radiocarbon (14C) data that was obtained on sediment samples from sub-Antarctic South Georgia. The sediments were collected from a range of different sites, including lakes, peat deposits, a marine inlet and a fjord during RV Polarstern expedition PS81 in 2013. Prior to the geochemical analyses reported here, the sediments were freeze-dried and ground. More details on the study sites, sampling and data evaluation can be found in Berg et al. (submitted manuscript).Sediment and plant samples for Radiocarbon (14C) analysis were pre-treated and analyzed as described by Rethemeyer et al. (2019). For the analysis of 14C in bulk organic carbon (bulk OC) and plant fossils were washed with 1% HCl (1 hr, 60°C followed by ca. 10 hr at room temperature) to remove carbonates. The acid insoluble fraction was then graphitized and analyzed for 14C at the CologneAMS facility (Cologne, Germany).For compound-specific 14C analysis individual alkanoic acids, alkanes and alkanols were isolated by preparative ... : Dated material:bulk organic carbon (bulk OC): acid insoluble fraction of organic carbon (AIO)plant makrofossil (plant): acid insoluble fraction of organic carbon (AIO)alkanol with x carbon atoms (Cx:0 alkanol): Compound-specific 14C age of alkanol with x carbon atomsalkanoic acid with x carbon atoms (Cx:0 alkanoic acid): Compound-specific 14C age of alkanoic acid with x carbon atomsalkane with x carbon atoms (Cx:0 alkane): Compound-specific 14C age of alkane with x carbon atoms ...