Leonora 1:250 000 outcrop geology dataset - Second edition

Brief description

Mapping of outcrop geology on Leonora SH5101 1:250 000 map sheet in the Eastern Goldfields, Western Australia, undertaken 1987-92 by Duggan MB, Oversby BS, and Williams PR, and 1998-99 by Stewart AJ and Liu SF as part of the National Geoscience Agreement (NGA). Briefly, mapping consists of geological boundaries/units, faults, folds, veins, dykes, joints, linears, marker beds, trends, structural measurements, and mineral deposits.

Lineage

Maintenance and Update Frequency: irregular

Statement: Geological and geophysical themes were generated from field observations (1987-1999) and interpretation using aerial photographs (1:25 000 colour). Mineral deposit locations and information are sourced from the MINEDEX database (2001) maintained by GSWA. Topographic themes have been provided by AUSLIG and DOLA with agreement that public release of any topographic data by AGSO will be in non digital form only. Some amendments to the topographic data have been made by the authors. Lineage of topographic data, prior to receipt from AUSLIG and DOLA, is uncertain. Except in the Leonora 1:100 000 sheet area, maps were compiled from unrectified photo overlays onto topographic bases supplied by AUSLIG and DOLA (see notes on topographic data below). In the Leonora 1:100 000 sheet area, the map was compiled from unrectified photo-overlays on to enlarged orthophotomaps prepared by AGSO from Kevron 1997-98 data. Drainage and, where necessary, other topographic features (eg fence lines) were used for spatial control of the geological data.Compilations were digitally captured either by hand or automatically by scanning and vectorising procedures. Point data with database origins have been located largely by non-differential GPS. Some detail may have been generalised, repositioned, or omitted from the primary data for cartographic purposes.