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Leonora-Neale transect 1:500 000 solid geologyNote: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2. Dataset citationANZLIC unique identifier: ANZCW0703004941 Title: Leonora-Neale transect 1:500 000 solid geology CustodianCustodian: Geoscience Australia Jurisdiction: Australia DescriptionAbstract: This data set was interpreted/compiled to provide geological context for the 2001 seismic reflection line acquired between Leonora and the northwest of the Neale 1:250 000 sheet. The data set includes reviewed solid geology for the Leonora (Blewett) and Laverton (Whitaker) 1:250 000 sheets but also includes 1:100 000 sheets for northeast Menzies and northern Edjudina 1:250 000 sheet areas, as well as aeromagnetic interpretation of the Rason and Neale 1:250 000 sheets. Archaean rocks of the Eastern Goldfields Province of the Yilgarn Craton form basement to the area traversed in the seismic survey. In the west, granite and abundant greenstone of the Norseman-Wiluna Belt are dislocated by major north-northwest to north oriented shear zones. East of the Norseman-Wiluna Belt, the crust is dominated by granitic lithologies with shear zones and greenstone in much lower abundance. Gneiss of the Proterozoic Albany-Fraser Province abuts the Yilgarn Craton about 50 km to the east of the eastern end of the seismic line. ANZLIC search words:
Spatial domain:
Geographic extent name: EDJUDINA - WA-2415 - 1:50 000 Map Series - Western Australia Geographic extent name: LAVERTON - WA-2195 - 1:50 000 Map Series - Western Australia Geographic extent name: RASON - WA-2255 - 1:50 000 Map Series - Western Australia Geographic extent name: LEONORA - WA-2243 - 1:50 000 Map Series - Western Australia Geographic extent name: MENZIES - WA-2365 - 1:50 000 Map Series - Western Australia Geographic extent polygon: 120 -28, 126 -28, 126 -30, 120 -30, 120 -28, Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register
Data currencyBeginning date: 2001-02-01 Ending date: 2002-06-01 Dataset statusProgress: Complete Maintenance and update frequency: Not Known Access
Access constraints: Digital data available from Geoscience Australia on CD or via the Internet (GEOCAT # 39714). Print on demand map, 1:500 000 scale, available from Geoscience Australia sales centre (GEOCAT # 39713). Free Data DownloadData qualityLineage: The lines and polygons of the solid geology (Leonora, Laverton, Menzies-part, Edjudina-part) were drawn on film overlayed on images of aeromagnetics (TMI), first vertical derivative of the aeromagnetics (TMI1vd), gravity, and aeromagnetics with outcrop geology at 1:100,000 scale. Lines and polygons of the edge-matched aeromagnetic interpretation (Rason and Neale) were drawn on film overlaying Images of TMI, TMI1vd, or contour plots of TMI at 1:250 000 scale. The film drawings were subsequently scanned, digitised on screen and attributed. Positional accuracy: The estimated positional accuracy of mapped rock type boundaries for the solid geology is in the order of 200 m where interpretation was based on outcrop, or the aeromagnetic data, and was undertaken at 1:100 000 scale. In many instances boundaries were required where there was no outcrop and little or no variation in the aeromagnetic data. In these instances boundary position is at best speculative. Where interpretation was based largely on aeromagnetic data and undertaken at 1:250 000 scale (Rason and Neale sheets), the estimated positional accuracy is in the order of 200-500 m. Attribute accuracy: The assigned attributes in the solid geology covers are qualitative as may be expected from interpretation of regional data sets in poorly exposed terranes. Logical Consistency: Data have been checked/edited visually on plots and for topological consistency using in-house routines and Arc/Info software. The specifications and detail of geological and aeromagnetic data for this part of Yilgarn Craton vary considerably and impact on the consistency of representation across the mapped area. In the east (Rason and Neale sheets), exposure of Archaean bedrock ranges from continuous cover to sparse outcrop and only 1:250 000 scale geology is available. Interpretation of aeromagnetic data for Neale (3000 m line spacing) and Rason (400-200 m line spacing) was undertaken at 1:250 000 scale and incorporated in the map to complement more detailed solid geology interpretation undertaken to the west. In the west, solid geology was complied at 1:100 000 scale and is based largely on 1:100 000 scale outcrop geology, 400 m line spaced aeromagnetic data (Leonora and Laverton), and some 200 m line spaced aeromagnetic data (provided by Fugro Airborne Surveys Pty. Ltd.; Menzies and Edjudina). Gravity data was also drawn on to provide the distribution of dense units and information on dipping contacts. Station spacings for gravity data vary from 11 km in the east to 2-4 km in the Leonora-Laverton area. Completeness: The map area may be split into two based on interpretation methodology and scale. Interpretation of the Rason and Neale sheets in the east draw mostly on aeromagnetic data presented at 1:250 000. In this area greenstone has not been subdivided and much detail of lithological trends, faults, and fractures has been summarily represented. To the west, a more complete interpretation of solid geology was compiled at 1:100 000 scale drawing extensively on recently mapped geology, gravity, and detailed regional aeromagnetic data. Contact information
Metadata informationMetadata date: 2013-03-08 Additional metadataMetadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703004941.html Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703004941.xml . Authors:Whitaker, A.J. Blewett, R.S. |
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