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Leading Practice Mining Acts Review | Central Eyre Iron Project mining lease approved

South Australia's central position within the Australian continent gives the state the advantage of hosting rocks with a wide range of ages and lithologies which are all potential (and proven) targets for mineral exploration

Geologists classify the rocks of a region by correlating, or grouping them together, on the basis of similar age, interpreted origin, and lithology, and frequently apply stratigraphic names (e.g. Sleaford Complex) to these groupings as an aid to communication.  Our present understanding of SA’s geological history and mineral deposits is the result of the integration of over 150 years of careful observation of rocks and their relationships. As the inventory of geological understanding has grown, it has become evident that our preserved geological history occupies discrete spans of time, separated by periods of no record.  At a broad level, the rocks formed during these spans of time are grouped into geological provinces, including sedimentary basins, with different names given to distinct groups of rocks formed during the same time period in different parts of the State.

The major subdivisions of geological time into Eons, Eras and Periods, and their age spans in millions of years (Ma), are indicated in the time scale. Most of these ages are determined by measuring the amount of decay of contained radioactive elements such as uranium for Precambrian rocks, and by examination of contained fossils for younger rocks. Unfortunately the age and relationships of many rock units unsuited to these techniques remain uncertain. Below are the major geological provinces present in South Australia, listed under time slices based on Eons and Periods.  

More detail can be found by following the links.

3200Ma

Archaean to early Mesoproterozoic

Gawler Craton

Curnamona Province

1450Ma

Mount Lofty Ranges Inliers

1450Ma

Middle to late Mesoproterozoic

Cariewerloo Basin

Musgrave Province

1000Ma

Coompana region and Beadell Province

1000Ma

Neoproterozoic

Adelaide Geosyncline, Stuart Shelf and Torrens Hinge Zone

541Ma

Officer Basin (Neoproterozoic)

521Ma

Cambrian to late Carboniferous

Arrowie Basin

Delamerian intrusive rocks

Post-Delamerian intrusive rocks and hydrothermal activity

Kanmantoo Province, basement to Murray Basin

Officer Basin (Cambrian-Devonian)

Stansbury Basin

299Ma

Warburton Basin

299Ma

Late Carboniferous to Triassic

Arckaringa Basin, Mulgathing Trough

Cooper Basin

Pedirka Basin

201Ma

Simpson Basin

201Ma

Jurassic to Cretaceous

Bight Basin (includes Duntroon Sub-basin)

Eromanga Basin

66Ma

Otway Basin

66Ma

Cenozoic

Eucla Basin and palaeodrainage

Gambier Basin

Lake Eyre Basin

Murray Basin

Pirie Basin

0Ma

Walloway Basin

For more information, contact:

Wayne Cowley
Principal Geologist

+61 8 8463 3076
wayne.cowley@sa.gov.au