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.

The buried basement encountered at a site located 5 km west-southwest of Coomandook is similar to that sampled by CSR Ltd in the same area. Four selected drill core samples were examined in hand specimen and in thin section. Metabasaltic lava and...

An integrated scientific research program addressing structural, sedimentological and metallogenic aspects of basin evolution has been conducted in the Kanmantoo Trough for the past three years. Joint collaboration in this program involved MESA, the...

Summarises the chemical classification and macroscopic visual attributes of basement igneous rocks seen in outcrop within the regional geological settings of northern Eyre Peninsula and the Gawler Ranges.

Interpreted sodic madupite and fitzroyite extrusive rock specimens sampled from east of Truro contain phlogopite phenocrysts of lamprophyric type in a felsic groundmass. The groundmass is composed of alkaline minerals, both saturated feldspars and...

Rocks consist of dolomitised dolerite and devitrified pitchstone, which may be volcanics or minor intrusives, and a microtonalite which may represent a thick dyke or small plug.

Rocks which in the field appear to be emplaced as dykes or lava flows have been found to be altered and weathered, and include metasediments and laterites or gossans. Rocks of probable igneous origin include basaltic and doleritic types. Only one...

This interpretation of magnetic and gravity data covering KINGOONYA was undertaken as part of an interpretation of the northern Gawler Craton, and was carried out without reference to any previous geophysical interpretation. Most of the work is based...

In January 1993, 15 water bores in the South-East were sampled for headspace gas. 7 of these bores provided sufficient gas for compositional analysis of hydrocarbons. Methane values ranged from 25% to 92% of the total gas for these bores, with...

The Cambro-Ordovician basement underlying Murray Basin sediments in the Cooke Plains and Coomandook areas was sampled by a reverse circulation drilling programme as part of the South Australian Exploration Initiative. Greenschist to low amphibolite...

The Adelaide Geosyncline contains an extremely thick folded Late Proterozoic to Middle Cambrian sequence deposited initially in rifted troughs and later in broad zones of regional subsidence. Age constraints on deposition are based on dating of rare...

Beda Volcanics and Backy Point Formation crop out in only a few localities on northeastern Eyre Peninsula, north of Whyalla, but drilling has shown them to extend for approximately 170 km to the north below younger cover. The Beda Volcanics comprise...

Of 2 rocks mapped as andesite in the Stavely Belt of western Victoria, 1 is more properly a meta-andesite since optical examination indicated considerable modification of mineral components. Movement of chemical constituents may be internal to the...

Mafic dykes and granitoid intrusions were emplaced around the southeastern margins of the Adelaide Foldbelt immediately prior to, during and following the Cambro-Ordovician (ca 500 Ma) Delamerian Orogeny, but are relatively uncommon elsewhere within...

Results of recent stratigraphic drilling, combined with previous investigations and interpretation of image-processed aeromagnetic data, indicate the presence of three major mafic/bimodal igneous suites within Early Palaeozoic basement lying beneath...

A drilling intersection of 6.5 metres near outcrop of the acid porphyry at Mount Monster is almost certainly part of the same suite. The rock contains phenocrysts of feldspar and quartz in a fine grained to microcrystalline groundmass of potash...

The Mesoproterozoic Gawler Range Volcanics - Hiltaba Granite Suite - related Olympic Dam style Cu-U-Au mineralisation, and Menninnie Dam replacement style Pb-Zn-Ag mineralisation, have served to raise the prospectivity of rocks in and underlying the...

In 2008, as part of work being performed for it to earn a 51% interest in the Mundi Mundi Plains joint venture exploration licences, Teck Cominco identified two geophysical targets within South Australia on Kalkaroo EL 3328 which it thought were...