Mundowdna, Wilpoorinna and Dalarinna Hill (part of the Marree Project). Combined final report at licences' joint surrender, for the period 21/6/2006 to 20/3/2009.
Created: 12 Nov 2024 Revised: 12 Nov 2024

Three areas located along the southern margin of the Eromanga Basin, east and south-east of Marree and adjacent to the Strzelecki Track, have been explored for possible economic sedimentary uranium accumulations in porous Mesozoic sandstones, as...

Three areas located along the southern margin of the Eromanga Basin, east and south-east of Marree and adjacent to the Strzelecki Track, have been explored for possible economic sedimentary uranium accumulations in porous Mesozoic sandstones, as it was believed that these strata occupy a good position to have received uranium-bearing groundwater from the Mount Painter Complex and Neoproterozoic rocks of the Flinders Ranges over an extensive period of time. Because the sandstones lie at relatively shallow depths of less than 100 m, and onlap older basement rocks of the Adelaide Geosyncline that consist of Palaeoproterozoic and Mesoproterozoic metasedimentary sequences and granite, Neoproterozoic sedimentary rocks, and Cambrian sedimentary rocks, they were considered by Eromanga Uranium to be ideal targets. Work undertaken during the first year of tenure included a combined EM (RepTem) and magnetic, helicopter-borne geophysical survey of the entire project area, reconnaissance geochemical sampling of bore water, and rock chip sampling to ground-truth uranium anomalies that are visible on airborne radiometric images. The aerial TEM data was acquired along 1 km spaced flight lines at a nominal sensor flight height of 30 m. The eight groundwater samples analysed were not anomalous with respect to uranium. Rock chip and soil samples collected from areas of maximum scintillometric gamma response within the confirmed radiometric anomalies returned assay values of up to 85 ppm U. During the second year of tenure, a rotary mud drilling programme was devised to test RepTEM conductive anomalies. In July and August 2008, 36 holes were drilled on ELs 3577 and 3578 for a total penetration of 4969 m, to depths ranging between 42 and 198 m. Except for holes MPRM031 to MPRM036, within which the drill rods were all run out (198 m) before basement was reached, the majority were drilled to bit refusal in Neoproterozic basement. 160 drill cuttings samples were analysed for uranium and thorium. Only two samples returned values above the lower detection limit of 5 ppm U. In hole MPRM014 the sample interval 16-18 m (weathered uppermost Bulldog Shale) returned a value of 9 ppm U. In hole MPRM027, the sample interval 12-14 m (basal Etadunna Formation sand) returned a value of 6 ppm U. Downhole wireline gamma ray logging of all the drillholes recorded no significant radioactivity. Because of the failure to detect significant uranium mineralisation on ELs 3574, 3577, and 3578, these tenements have been surrendered.

More +

About this record

Record No mesac23649
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor
Sponsor
Tenement
Tenement Holder Maximus Resources Ltd
Operator Eromanga Uranium Ltd
Geological Province Eromanga Basin
Mine Name
Stratigraphy
Commodity uranium
Notes
Geographic Locality: Mundowdna Waterhole;Wilpoorinna Homestead;Dalarinna Hill;2007 Marree Aerial EM Survey;2007 Marree Aerial Magnetic Survey
Doc No: Env 12013
Drillhole: MPRM001 - MPRM036
Drillhole Unit No: 6527 01809

Geographic Locality: Mundowdna Waterhole;Wilpoorinna Homestead;Dalarinna Hill;2007 Marree Aerial EM Survey;2007 Marree Aerial Magnetic Survey Doc No: Env 12013 Drillhole: MPRM001 - MPRM036 Drillhole Unit No: 6527 01809

Language English
Metadata Standard ISO 19115-3

Citations

Use constraints License
License Creative Commons Attribution 4.0
Persistent identifier https://pid.sarig.sa.gov.au/document/mesac23649
Citation Miller, D.T.;Abbott, S.;Parker, F.M. Mundowdna, Wilpoorinna and Dalarinna Hill (part of the Marree Project). Combined final report at licences' joint surrender, for the period 21/6/2006 to 20/3/2009. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac23649

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[138,-30.5],[139,-30.5],[139,-29],[138,-29],[138,-30.5]]]}
Purpose

                    
                    

                    
                  
Lineage