This investigation was undertaken primarily to assess the importance of a discovery of gold in the tributaries of the Porgera River west of Mt. Hagen, Mandated Territory of New Guinea. Two patrols were carried out. The first patrol was from Wabag to Mongureba. The purpose of the patrol was to inspect the main gold find in the vicinity of Mongureba. The occurrence of alluvial gold was also reported from the River Timen area, and consequently a patrol from Wabag to Mt. Hagen Police Post by way of the River Timen was undertaken. This report gives an account of the geological reconnaissance and its findings. The physiography, geology, geomorphology, and economic geology of the area are described. Accompanying maps and photographs are included.

Australian Proterozoic Mineralising events on Australian Gold Resources base, 1:4 000 000 July 2007 Version

A ~400 km long deep crustal reflection seismic survey was carried out in Central Victoria, Australia, in 2006. It has provided information on crustal architecture across the western Lachlan Orogen and has greatly added to the understanding of the tectonic evolution. The east-dipping Moyston Fault is confirmed as the suture between the Delamerian and Western Lachlan orogens and is shown to extend down to Moho. The Avoca Fault, which is the boundary between the Stawell and Bendigo zones, is a west-dipping listric fault that intersects the Moyston Fault at a depth of about 22 km, forming a V-shaped geometry. Both the Stawell and Bendigo structural zones can be broadly divided into a lower crustal region of interlayered and imbricated metavolcanic and metasedimentary rocks and an upper crustal region of tightly-folded metasedimentary rocks. The Stawell Zone was probably part of a Cambrian accretionary system along the eastern Gondwana margin and mafic rocks may have been partly consumed by Cambrian subduction. Much of the Early Cambrian oceanic crust beneath the Bendigo Zone has not been subducted but is preserved as a crustal-scale imbricate thrust stack. The seismic data have shown that the 'thin-skinned' structural model appears to be valid for much of the Melbourne Zone whereas the Stawell and Bendigo zones have a 'thick-skinned' structural style. Internal faults in the Stawell and Bendigo zones are mostly west-dipping listric faults, which extend from the surface, with listric geometries, to near the base of the crust. The Heathcote Fault Zone, which forms the boundary between the Bendigo and Melbourne zones, extends to at least 20 km, and possibly to the Moho. A striking feature in the seismic data is the markedly different seismic character of the mid to lower crust of the younger Melbourne Zone. The deep seismic reflection data for the Melbourne have revealed a multilayered crustal structure that supports the Selwyn Block model.

No abstract available

Globally supracrustal sedimentary rocks are known to preferentially precipitate gold between 2400 Ma and 1800 Ma (Goldfarb et al. 2001). The Palaeoproterozoic Tanami and Pine Creek regions of Northern Australia host one world-class gold deposit and many other gold deposits in anomalously iron-rich marine mudstones (Figure 1). New fluid-rock modelling at temperatures between 275 - 350C suggest a strong correlation between gold grade and these Palaeoproterozoic iron-rich, fine-grained sedimentary rocks.

The purpose of the presentation was to show mineral explorers how recent results from the Gawler Mineral Promotion Project may be used in their quest for blind iron-oxide copper gold (IOCG) deposits in the Gawler Craton. The Gawler Project ran from late 2000 to early 2006. The project developed new methods of exploring prospective basement beneath deep cover.

A map showing the distribution of selected mines and mineral depsosits for a range of commodities. It also shows the distribution of petroleum resources in basic form. The map base is the georegions of Australia

The Cobar field was visited during the period 18th to 24th July, mainly in connection with the exploration programme which is taking place in that area. During this visit, however, some information was obtained concerning the operations of the mines controlled by New Occidental Gold Mines, N.L., which company is being assisted financially by the Commonwealth. Estimated operational costs, grade, and production figures are given. The development, exploration, and future of the field are discussed.

A magnetic survey of the Kunimo creek area near Kuta in the Central Highlands of New Guinea was carried out between July 17th and July 28th, 1950. It was hoped that the survey would trace the course of the auriferous wash originally laid down in the bed of a former creek but now concealed by overburden of soil and unconsolidated volcanic ash. This report gives an account of the magnetic survey and its results.

Australian Gold Resources Maps, 1:10 000 000, October 2005 Version