All scientific data collected by the Australian Antarctic program (AAp) are eventually described in the Catalogue of Australian Antarctic and Subantarctic Metadata (CAASM). CAASM can be used to search through AAp data descriptions, and it also provides links to access publicly available datasets, which can either be immediately downloaded or obtained from the Australian Antarctic Data Centre (AADC).
This dataset includes (U-Th)/He analyses on zircon and apatite grains from samples in the Knox Rift region. Samples were analysed at the John de Laeter Centre (Curtin University), using conventional single grain (U-Th)/He dating techniques.
This dataset includes (U-Th)/He analyses on zircon and apatite grains from samples in the Knox Rift region. Samples were analysed at the John de Laeter Centre (Curtin University), using conventional single grain (U-Th)/He dating techniques. The file format is Microsoft Excel. The first sheet provides machine-readable summary of the data while the second worksheet includes the processed analytical data for each sample. Sample locations (Latitude, Longitude, Elevation - WGS84), location names, sample lithologies and the source collections of the original sample are included. -9999.9 indicates missing data.
This dataset provides an indication of the timing in which analysed samples were cooling through the Helium partial retention zone of Apatite (~40-80 degrees C) and in Zircon (~150-220 degrees C). These data may represent the aftermath of heating during tectonic events (e.g., rifting), or may indicate exhumation of analyzed rocks from depth, either during active tectonic events and/or through erosion.
In general, data quality is excellent from analytical standpoint (i.e., single grain ages reproduce within analytical uncertainty), however, in some case quality of analytical results was compromised by insufficient quality of dated material. For example, in some cases quality of apatite crystals did not entirely meet the requirements as the crystals contained mineral or fluid inclusions which can potentially affect the accuracy of (U-Th)/He dating results.
These data are not yet publicly available.
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4460_Thermochronology when using these data.
2019-11-04 - record created by Alan Aitken.