Interpreted bedrock geology 1:100 000 (DMIRS-038)
The digital ‘1:100 000 State interpreted bedrock geology of Western Australia’ comprises three layers: the primary 1:100 000 State interpreted bedrock geology, the 1:100 000 State interpreted bedrock geology lines, and the 1:100 000 State interpreted bedrock linear structure layer. The product covers approximately 40% of Western Australia, with a focus on areas of exposed Archean and Proterozoic bedrock. The linear structure layer refers primarily to pre-Cenozoic bedrock structures. This compilation is based on Geological Survey of Western Australia’s (GSWA) published Geological Information Series (GIS), Geological Exploration Packages (GEP) and digital compilation layers for which digital 1:100 000 and 1:250 000 interpreted bedrock geology is available. Data included are a 1:100 000 scale IBG of a YULE, SATIRIST, HOOLEY map sheets based on a surface geology interpretation published in the NORTHWEST PILBARA 2020 GIS. Mapping from De Grey Mining LTD (2021 Annual Report) has been used to update some of the geology on YULE in the Mount Berghaus area. The margins of adjacent map sheets (WILLINGA, WODINA, WHITE SPRINGS, WITTENOOM, MOUNT BILLROTH, McRAE and MOUNT GEORGE) have been modified to accommodate the new maps into the state geology layers. 1:100 000 IBG of DALGARINGA and parts of SANDSTONE, ATLEY, EVERETTE CREEK and RAYS ROCK, in the YOUANMI Project Area are also included, and are now part of 2022 WEST YILGARN GIS USB package. These are also published in the 2020 YOUANMI GIS USB package. In the WEST YILGARN Project Area over 60 map sheets have been completed as pre-Mesozoic IGB during the 2020–2021 Accelerated Geoscience Program and published in the 2021 Southwest Yilgarn GEP. These are now also included in the 2022 WEST YILGARN GIS USB package. In the EAST ALBANY–FRASER Project Area, over 90 map sheets have been completed as Pre-Carboniferous IGB layers and published in the 2020 EAST ALBANY–FRASER USB package. Older data packages included are: Western Capricorn Orogen 2018, Nabberu 2019, Tanami–Arunta 2018, West Musgrave 2019, East Yilgarn 2018, Kimberley 2018 with Montague Sound 2019, Fortescue–Hamersley 2018 (1:250 000 interpreted bedrock geology), and Pilbara 2014 (1:250 000). Geological interpretation in these packages is based on extensive fieldwork, petrology, geochemistry, geochronology, interpretation of geophysical datasets (magnetics, radiometrics and gravity), remote sensing imagery (ASTER and LANDSAT), seismic and magnetotelluric profiles, drilling and previously published and unpublished geological mapping. With the exception of minor topological corrections, the spatial integrity of the source packages is maintained. For adjacent but separately compiled packages, seamless interpretation along the edges of project areas has not been executed in order to preserve the spatial integrity of the source information. The nomenclature and hierarchy for the lithostratigraphic units in the polygon and line layers are based on weekly updates from the Explanatory Notes System (ENS). In order to provide the most up-to-date geological information for the units in question, attribution from the original source is modified to remove superseded stratigraphic units, display correct stratigraphic relationships and include more recent geochronology. The source package of each feature is captured as an additional attribute field. Individual packages are available via the Department of Mines, Industry Regulation and Safety’s (DMIRS) eBookshop .
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Additional Information
| Field | Value |
|---|---|
| Data last updated | unknown |
| Created | unknown |
| Format | SHP GDB TAB |
| Licence | Creative Commons Attribution 4.0 |
| Section | Data Downloads |
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