Strzelecki6 ranges in thickness from 266 m to 4000 m. HGU 30 Represents the Palaeozoic Basement. – Internal GSV grids were used as the foundation for the Palaeozoic (30) HGU. The Palaeozoic surface was then modified in the following ways: BSE (GHD 2012; SKM 2009) was clipped to the extent of Palaeozoic outcrop and merged with Palaeozoic basement; Basement intersections from Constantine (2009) were used to constrain Palaeozoic basement depth; Strzelecki intersections from (Constantine 2009) were used to limit the upward extent; Interpretations based on isostatic gravity anomalies were used to mould the geometry of troughs; offshore basement surfaces from McLean & Blackman (2013) and Stuart-Smith et al. (2010) were merged together. The Palaeozoic HGU ranges in thickness from 2 m to 262 m. Model Name Inputs Geology - Comment References layer 1 Marine Bathymetry Marine water thickness Whiteway (2009) Water 2 QA VAF 101 Quaternary GHD (2012) SKM (2009) 3 UTQA VAF 102; -10m elevation Haunted Hill Formation GHD (2012) contour SKM (2009) 4 UTQD VAF 103 Nuntin clay GHD (2012) SKM (2009) 5 UTAF VAF 105 Boisdale Formation GHD (2012) SKM (2009) 6 UTD VAF 106 Jemmys Point Formation and upper Hazelwood Formation GHD (2012) SKM (2009) 7 Y COAL VAF 106 Yallourn coal seams; 1,1a, 1b and 2 GHD (2012) Yallourn Coal (isopach) SKM (2009) GHD (2011) 8 Y Interseam VAF 106 y_all floor & M1a_all top GHD (2012) Yallourn Coal Interseam SKM (2009) GHD (2011) 9 UMT A&D UMTA 107 Balook Formation Tambo River, Wuk Wuk Marl, Gippsland GHD (2012) Limestone, Morwell Coals UMTD 108 SKM (2009) 10 M1A COAL UMTA 107 Yarragon Formation, M10, M1a, M1b2, ML, M12; M1a_all GHD (2012)
Strzelecki6 ranges in thickness from 266 m to 4000 m. HGU 30 – Represents the Palaeozoic Basement. Internal GSV grids were used as the foundation for the Palaeozoic (30) HGU. The Palaeozoic surface was then modified in the following ways: BSE (GHD 2012; SKM 2009) was clipped to the extent of Palaeozoic outcrop and merged with Palaeozoic basement; Basement intersections from Constantine (2009) were used to constrain Palaeozoic basement depth; Strzelecki intersections from (Constantine 2009) were used to limit the upward extent; Interpretations based on isostatic gravity anomalies were used to mould the geometry of troughs; offshore basement surfaces from McLean & Blackman (2013) and Stuart-Smith et al. (2010) were merged together. The Palaeozoic HGU ranges in thickness from 2 m to 262 m. Model layer Name Inputs Geology - Comment References 1 Marine Water Bathymetry Marine water thickness Whiteway (2009) 2 QA VAF 101 Quaternary GHD (2012) SKM (2009) 3 UTQA VAF 102; -10m elevation contour Haunted Hill Formation GHD (2012) SKM (2009) 4 UTQD VAF 103 Nuntin clay GHD (2012) SKM (2009) 5 UTAF VAF 105 Boisdale Formation GHD (2012) SKM (2009) 6 UTD VAF 106 Jemmys Point Formation and upper Hazelwood Formation GHD (2012) SKM (2009) 7 Y COAL VAF 106 Yallourn Coal (isopach) Yallourn coal seams; 1,1a, 1b and 2 GHD (2012) SKM (2009) GHD (2011) 8 Y Interseam VAF 106 Yallourn Coal Interseam y_all floor & M1a_all top GHD (2012) SKM (2009) GHD (2011) 9 UMT A&D UMTA 107 UMTD 108 Balook Formation Tambo River, Wuk Wuk Marl, Gippsland Limestone, Morwell Coals GHD (2012) SKM (2009) 10 M1A COAL UMTA 107 Yarragon Formation, M10, M1a, M1b2, ML, M12; M1a_all GHD (2012)
G3-Gippsland-groundwater-model-report-June2015.docx