Data Delivery

Geoscience Australia's Geochron Data Delivery system provides public access to Geoscience Australia’s geochronological data. Users can discover geochronological data, view on-screen summaries and download Microsoft Excel workbooks containing comprehensive data, including:

  • Selected samples and their parent sites
  • various subsample material targeted for analysis
  • each overarching interpretation and its subsidiary data-grouping and interpreted age information
  • each underlying analytical data-table, and associated information pertaining to analytical sessions, data-reduction parameters, and summary metadata for concurrently-analysed reference materials.

Geochronology data coverage

The initial (October 2011) release of the Geochron Delivery system delivers a small subset of Geoscience Australia's U-Pb SHRIMP data. This corresponds to approximately 20% of the U-Pb SHRIMP data held in the legacy OZCHRON system, with a strong bias towards data collected prior to 1997. Uploading data from 2007-present is an ongoing process, although some data from South Australia is already available. Migration of the remaining U-Pb SHRIMP data from OZCHRON will be completed by June 2012.

Geochronological and related data obtained via other methods such as K-Ar, Ar-Ar, Rb-Sr, U-Pb via conventional isotope-dilution TIMS, and Lu-Hf will be added at a later date.

Sample-related data

The initial release contains sample-related data of variable quality. Most spatial data, including Mapsheet and Geological Region, is complete and correct, but rock-related attributes such as Lithology Group, Province, and Stratigraphic Name are sparsely populated. Consequently, spatial searches will usually produce more reliable results than rock-related attributes.

Functionality

Using Firefox or another standards-compliant web browser is recommended. As a large amount of underlying data is assembled to match your search, please be patient while the search is running. If you receive a warning message stating that a script is causing the browser to run slowly, click 'No' to allow the script to continue.

The Geochron Delivery system contains a map interface and a search tab. You can use the map to search for spatial criteria and the search tab to search spatial, geological and geochronological criteria. Search results are displayed on both screens, with symbols on the map linked to the Result-list on the right-hand side. Click the '+' symbol in the Result list to display additional geological information about the sample, and a summary of the interpreted age information assigned by the geochronologist. Select one or more records in the Result list and click Download to download a Microsoft Excel workbook.

Topic contact: geochronology@ga.gov.au Last updated: October 4, 2013