Pre-Mesozoic rocks are best exposed in the Willouran Ranges SW of Marree, but inliers occur as far west as Stuart Creek. These approximate the junction of the Stuart Shelf (to the west) with the Torrens Hinge Zone, which extends east to the Norwest...

Cuttings from Kakoonie 1 on the SW margin of the Black Hill complex indicate alternating intersections of gabbroic lithologies with modified marginal facies and altered contact rocks. Local compositional changes in the gabbros are evident and a...

A few of the submitted rock specimens are of metasediments, but the majority are of members of the alkaline-lamproite suite under investigation in the area. All the lamproites carry phlogopite phenocrysts, amongst which it is possible to distinguish...

A lamprophyre province has been identified in the Truro area comprising numerous dykes and at least one diatreme. The regional extent of the province has not been determined. The lamprophyre dykes, of the calc-alkaline suite and classed as minette,...

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Two major belts of anomalous gravity and magnetic intensity are distinguished at the SW margin of the Murray Basin. The main belt is about 420 km long and is arcuate in broad outline. In detail it appears to be controlled by three major linear...

Drilling and sampling of basement rocks underlying the south-western Murray Basin, newly performed by CSR Ltd and SADME, have revealed that a hitherto unknown igneous domain exists there. The most abundant rocks are altered and soda-enriched basaltic...

Sedimentation in the Great Australian Bight (GAB) has occurred in a variety of settings from the initial intra-cratonic rift to the modern carbonate shelf. An extensive palaeodrainage system, remnants of which are still preserved, supplied clastic...

Diamonds were first found in South Australia at the Echunga Goldfield by gold panners in 1859. Reports of 50 saleable diamonds and possibly up to 200 diamonds are recorded through to 1900. Since then one diamond of reasonable size has been found...

As part of the South Australian Steel and Energy Project, MESA has targeted Palaeoproterozoic banded iron formation (BIF) rocks at Giffen Well prospect as a possible iron ore resource. Ground magnetic, gravity and drilling programmes have identified...

Following the acquisition and interpretation of 435 line km of ground magnetic surveys over selected aeromagnetic anomalies within regions of high magnetic relief on the northern Gawler Craton, 121 reverse circulation holes totalling 8609.25 m were...

As part of the South Australian Steel and Energy Project, MESA has explored several significant aeromagnetic anomalies to try to find a possible iron ore resource. The Sequoia, Wirrida and Gina magnetic anomalies were chosen as indicating...

Mines and Energy South Australia, as part of its contribution to the South Australian Steel and Energy Project, has defined an iron ore resource in the Coober Pedy region. Extensive ground magnetic, gravity and drilling programs identified four...

As part of the South Australian Steel and Energy Project, MESA has targeted significant aeromagnetic anomalies in the search for a possible iron ore resource. At Peculiar Knob prospect, previous company exploratory drilling in 1985 of such a magnetic...

The core includes metasediments which may be equivalent to Kanmantoo Group. Regional foliation from the Delamerian Orogeny has been overprinted by thermal recrystallisation associated with massive plutonic intrusion. Metasomatic activity is of...

SADME Nanyah 1 (hole synonym M154), a Murray Basin hydrogeological observation bore, was extended beneath the sedimentary cover to reach basement in order to investigate the source of a prominent aeromagnetic anomaly. A 3-metre bottomhole core of...

The Nundroo basement drilling project was proposed in February 1987 by SADME's Regional Geology Branch as the first phase of investigation of the little known rocks of the south-western Gawler Craton. Previous drilling in this area had been restricted...

The dating of the volcanic rocks encountered in EL 600 mineral exploration diamond drillhole DP1 as Archaean (and by definition, also Mulgathing Complex) substantially changes the view of Archaean rocks in South Australia. Elsewhere, Archaean to...

Specimens collected from a circular geomorphological feature near Truro are interpreted as products of the alkali metasomatism of syenite, gabbro and dolerite. It is suggested that they may be xenoliths in a lamproitic diatreme.

Volcano-plutonic rocks of the Nuyts Archipelago represent a discrete phase of felsic magmatism at about 1630 Ma. Associated with the Nuyts Volcanics are grey alkali granites, leucogranites and leucoporphyries - here defined as the Saint Francis...