Geochemical and geochronological data from the Fossil Bluff Group, Antarctica ...

• Main Author: Riley, Teal
• Format: Dataset
• Language: English
• Published: NERC EDS UK Polar Data Centre 2023
• Subjects: "EARTH SCIENCE","SOLID EARTH","GEOCHEMISTRY"; geochemistry; geochronology; provenance; zircon; Alexander Island; Antarctic; Fossil Bluff; Riley; Antarc*; Antarctica; British Antarctic Survey
• Online Access: https://dx.doi.org/10.5285/f4f0c90e-7ed6-46f4-8973-dd4475c5dcde; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01744

The files include full analytical details and datasets from the laboratories used for the acquisition of U-Pb zircon geochronology and Lu-Hf isotope geochemistry. The data were collected in the interval September 2022 to January 2023 across a number of laboratories: Stockholm, University College London and Australian National University (U-Pb zircon geochronology); British Geological Survey (Lu-isotopes). The analyses were conducted by Teal Riley (Stockholm, British Geological Survey), Ian Millar (Australian National University) and Andrew Carter (University College London). The analyses were conducted to examine the provenance and depositional history of the Fossil Bluff Group fore arc basin sediments of Alexander Island. NERC N-ALI funding to Geology & Geophysics. ... : Analytical methods: Zircon U-Pb geochronology was conducted at five separate laboratories: NORDSIM analytical facility (Stockholm) Zircons were separated and concentrated from rock samples (sample_information.csv) at the British Antarctic Survey, Cambridge. From the zircon concentrate, hand-picked grains were mounted in epoxy resin along with the Geostandards zircon 91500 (207Pb/206Pb age of 1065.4 +/- 0.3 Ma), which has reported U and Pb concentrations of 80 ppm and 15 ppm respectively (Wiedenbeck et al., 1995). The mount was polished to expose the centres of the grains and imaged by SEM using a cathodoluminescence (CL) detector in order to reveal their internal structure and guide analysis location. U-Pb ion-microprobe zircon geochronology was carried out using a CAMECA 1280 ion microprobe at the NordSIM facility housed at the Swedish Museum of Natural History in Stockholm. The analytical method closely followed Whitehouse & Kamber (2005), but differs insomuch that the oxygen ion primary beam was ...