Gawler Craton Mineral Promotion: Maps and Online GISOverviewLocation within Gawler Craton of maps and online GIS produced by the Gawler Mineral Promotion project:
MapsThe below free PDF format maps are available for free download, alternatively a hard copy, paper map can be supplied for the cost of transfer from the Geoscience Australia Sales Centre. Northwest Mulgathing Complex Interpreted Pre-Cambrian Basement GeologyAn interpretation of the Mulgathing Complex, a late Archaean high grade metamorphic complex in the northwest of the Gawler Craton, host to the Challenger Au deposit. This interpretation is based on gravity, drillhole and airborne magnetic datasets, ground reconnaissance and published geological maps.
Geophysical Interpretation: Harris Greenstone Belt, Gawler Craton, South AustraliaThe Harris Greenstone Belt in the central Gawler Craton of South Australia has potential for Archaean Ni-Cu-PGE sulphide and Archaean-Proterozoic lode-Au mineralising systems. This map is a preliminary interpretation of the Precambrian basement geology based on aeromagnetics, gravity, and diamond drilling. It highlights the extensive distribution of poorly exposed Archaean komatiites and associated rocks (green) that have a strike extent of at least 300 km. The regional pattern of linear komatiitic sequences associated with ovoid granitic plutons and province-wide shear systems, is very similar to the economically important Eastern Goldfields Province in the Yilgarn Craton, Western Australia.
Geophysical Interpretation of the Central Olympic Cu-Au ProvinceAn interpretation of the pre-Neoproterozoic and Archaean rocks of the central Olympic Cu-Au province of the eastern Gawler Craton based on calibrated gravity and magnetic data.
Yorke Peninsula (Moonta Subdomain) Pre-Neoproterozoic Basement GeologyA snapshot of the latest interpretation of the basement geology based primarily on airborne geophysics and drillhole logging.
Iron oxide Cu-Au (-U) potential of the Gawler Craton, South AustraliaThe map of iron oxide copper-gold (IOCG) potential of the Gawler Craton, South Australia, shows the spatial distribution of key "essential ingredients" of IOCG ore-forming systems. These "ingredients" include: (a) rock units of the Gawler Ranges-Hiltaba Volcano-Plutonic Association, subdivided by supersuite; (b) faults/shear zones subdivided by interpreted age of youngest significant movement; (c) copper geochemistry (>200ppm), from drill holes intersecting crystalline basement (Mesoproterozoic and older); (d) hydrothermal alteration assemblages and zones, based on drill hole logging, potential-field interpretation, and inversion modelling of potential-field data; and (e) host sequence units considered important in localising IOCG alteration and mineralisation. Also shown are Nd isotopic data and the mineral isotopic ages of late Palaeoproterozoic to early Mesoproterozoic magmatism and hydrothermal minerals. Areas with the greatest number of "essential ingredients" are considered to have the maximum potential for IOCG mineralisation. IOCG potential of the Gawler Craton is shown as domains with ranks from 1 to 4, with 1 being the highest rank.
Online GIS (web mapping systems)The online GIS (web mapping systems) were produced using the open source Mapserver GIS system, versions 3.5 and 3.6 using the Rosa Java Applet. Yorke Peninsula (Moonta Subdomain)A snapshot of the latest interpretation of the basement geology based primarily on airborne geophysics and drillhole logging.
Olympic SubdomainA snapshot of some of the datasets in the Geophysical Interpretation of the Central Olympic Cu-Au Province.
Harris Greenstone BeltA snapshot of some of the datasets in the Geophysical Interpretation of the Harris Greenstone Belt.
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