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Listing of the Geological Survey of South Australia's most recent releases

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Results and outcomes of the Minerals System Drilling Program

RB2016/00030 cover A comprehensive review of MSDP results and outcomes has now been compiled. The report not only provides geological insights from the 9 month drilling campaign along the southern Gawler Ranges, but summarises key results of trials of DET CRC technology.

Mineral Systems Drilling Program in the southern Gawler Ranges, South Australia. RB 2016/00030

Identifying lithospheric boundaries using magnetotellurics and Nd isotope geochemistry: An example from the Gawler Craton, Australia

Graphical Abstract Major lithospheric structures play a fundamental role in localising crustal deformation and metal enrichment in the crust. The eastern Gawler Craton contains a major lithospheric structure which appears to be spatially coincident with the western boundary of the c. 1590 Ma Olympic Cu-Au Province. This study contains an interpretation of the location of this lithospheric structure on northern Eyre Peninsula by integrating magnetotellurics and deep crustal reflection seismics with isotopic data from crustally-derived felsic igneous rocks.

Available as Open Access from Precambrian Research

Sedimentary basin formation associated with a silicic large igneous province: stratigraphy and provenance of the Mesoproterozoic Roopena Basin, Gawler Range Volcanics

Graphical Abstract The two largest currently mined IOCG deposits within the Olypmic Cu-Au Province of the Gawler Craton, Olympic Dam and Prominent Hill, are both spatially associated with sedimentary rocks deposited synchronous with volcanism, and it has been suggested that the presence of an active sedimentary basin may have been critical to the formation of mineralisation. This study presents litho-stratigraphic mapping and logging and detrital zircon geochronology of the Roopena Basin on northern Eyre Peninsula, and discusses the implications for the tectonic regime during emplacement of the Gawler Range Volcanics and formation of the IOCG systems.

Available as Open Access from the Australian Journal of Earth Sciences

Interpreted geology of the eastern Coompana Province

Interpreted geology of the eastern Coompana Province, 1:500 000 scale

West of the Gawler Craton, the Coompana Province is entirely unexposed, with cover ranging from a few hundred metres to greater than 1400 m beneath the Denman and Officer basins. Prior to the Coompana Drilling Project, minimal crystalline basement intersecting drillholes were available to constrain largely geophysical interpretations of the Coompana Province basement geology.  Wise et al. provided a preliminary interpretation of broad geophysical domains in the South Australian portion of the Coompana Province based on the 2015 Coompana airborne survey, which has been updated and refined with new insights from data acquisition campaigns.

This 1:500,000 scale map represents a constrained (where possible) interpretation of the geological units, features and structures within the eastern Coompana Province and incorporates the newly-defined stratigraphic units intersected in the Coompana Drilling Project.

Download the Interpreted geology of the eastern Coompana Province, 1:500 000 scale digital map

Six Mile Hill - MSDP Special Map Series

As part of the Mineral Systems Drilling Program (MSDP), a detailed geological mapping program was carried out at each of the three MSDP drilling areas (Six Mile Hill, Peltabinna and Mount Double) between July 2015 and April 2016. The Six Mile Hill maps and report are the first products to be released from this 1:75 000 MSDP Special Map Series.

Six Mile Hill maps and Report

The Surface geology of Six Mile Hill Map Sheet provides a detailed representation of the regolith and outcropping Proterozoic stratigraphy of Six Mile Hill, and includes a number of peripherals, including TMI, gravity, DEM imagery, a reliability diagram showing field observation sites, a solid geology inset and a customised legend. Simplified stratigraphic logs of the MSDP drillholes are also displayed on the map.

The Interpreted Proterozoic solid geology of Six Mile Hill Map Sheet provides an interpretation of the Neoproterozoic stratigraphy of the Stuart Shelf and underlying Meso- to Palaeoproterozoic stratigraphy of the Gawler Craton, obscured by extensive Cenozoic cover.

The Geology of the Six Mile Hill Map Sheet Report Book 2016/00014 is a report describing the physiography, regional geology, stratigraphy, structural geology and geological history of the Six Mile Hill area.

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Regolith map of the Southern Gawler Ranges Margin (YARDEA and PORT AUGUSTA 1:250 000 map sheets)

Regolith map of the Southern Gawler Ranges Margin map

The new regolith map of the Southern Gawler Ranges Margin provides a valuable regional overview of the main regolith types and their associated landforms, a general outline of the major areas of bedrock or regolith dominated terrain as well as the occurrence of in-situ versus transported regolith of this emerging mineral province.

It aims to provide a broad-scale framework for guiding geochemical prospecting for a wide range of minerals and materials, as a basis for guiding mineral exploration, and to provide a useful dataset for addressing other land use issues like groundwater.

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3D geological models

Punt Hill region 3D data package
Punt Hill region 3D data package

The Punt Hill region, located 105 km NNW of Port Augusta, includes some of the best examples of widespread skarn development in the eastern Gawler Craton. This model is a case study for developing a multi-disciplinary approach to characterise, map and predict alteration associated with skarn-dominated mineralisation and further advances the understanding of mineral systems developed in this region.

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3D Architecture model of the western Gawler Craton
3D Architecture model of the western Gawler Craton

A new crustal architecture model for the frontier western Gawler Craton is available following collaborative work undertaken on Australia’s longest deep crustal seismic line.

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South Australian Mineralogical Data Package

South Australian Mineralogical Data Package

The South Australian Mineralogical Data Package provides spectral data for over 850 drillholes from across South Australia.

Each package includes a specific spectral scalar point set with its state-wide 3D voxet interpolation.

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Depth to Crystalline Basement GIS dataset 2018

Depth to Crystalline Basement GIS DatasetThe Depth to Crystalline Basement Data Package is a collection of GIS datasets (in ArcGIS and Mapinfo formats) that portray actual or inferred depth to crystalline basement in South Australia, which have been assembled on a province-by-province basis. Also included are depths to the top of time-slices based on logged drillhole stratigraphic units.

Download the Depth To Crystalline Basement Data Package.

AusLAMP 3D resistivity models

AusLAMP 3D resistivity modelsThe Australian Lithospheric Architecture Magnetotelluric Project is nearing completion across South Australia. A 3D resistivity model across northeast South Australia encompassing the northeast Gawler Craton, the Simpson Desert and the Cooper Basin, is now available for download as a 3D data package and can be viewed as depth slices on SARIG. Depth slices from a 3D model across the Gawler Craton and surrounds (Coompana Province, Ikara Flinders Ranges, Curnamona Province) can also be viewed on SARIG.

Download the AusLAMP 3D resistivity model data packages
View the depth slices in SARIG

PACE Musgrave Province Airborne Electromagnetic Survey

PACE Musgrave Province AEM image17,395 line kilometres of new data in one of the last true exploration frontier areas in Australia is now available to download from SARIG.

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PACE Copper Coompana Gravity Survey

PACE Copper Coompana Gravity Survey image13,000 new gravity observations in the state’s largely underexplored far west are available to download from SARIG.

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