Abstract
This map portrays the Cambrian to Upper Devonian basement geology of the map area draped over a first vertical derivative of total magnetic intensity image together with metallic and selected industrial mineral deposits with a known commodity endowment (past production and global resources) of greater than $10 000 value. Deposits are categorised by mineral system type, value and dominant commodity as detailed in the mineralisation reference at far left. Metallic mineral deposits with a value greater than $100 000 000 are listed in the 'Table of deposits' by name and commodity, and are numbered on the map
Deposits and districts have been classified using the terms in the Mineral Systems of New South Wales schema of Downes et al. (2011). Individual deposits are assigned to a specific deposit type based on a range of criteria including, but not limited to: age constraints; ore and gangue mineralogy; alteration; host lithostratigraphy; isotopic characteristics; deposit and vein morphology; and, geological setting. Hard rock metallic deposits shown on the map generally relate to Ordovician to early Silurian porphyry Cu–Au systems, middle Silurian to Lower Devonian fractionated felsic intrusions and Middle Devonian (Tabberabberan) deformation events.
REFERENCE
Gilmore P.J., Eastlake M.A., Trigg S.J., Campbell L.M., Bull K.F., Deyssing L., Williams B.J., Musgrave R.J. & Downes P.M. 2020. East Riverina 1:500 000 basement geology and metallogenic map. Geological Survey of New South Wales, Maitland.