The Coolgardie Project

REGION: Coolgardie, Western Australia
OWNERSHIP: Kidman Resources Ltd
LOCATION: 6 kms south of Coolgardie.
PRODUCT: Gold
PROJECT STATUS: Production and Development
HOLDING: 3.03 km2

OVERVIEW

The Burbanks Gold Project is situated near Coolgardie, 35 kms south west of Kalgoorlie, Western Australia. The project is comprised of the operating Birthday Gift Underground Mine and the Christmas Open pit Mine

Kidman Resources has re-established the operations of the Birthday Gift underground mine and recently announced a maiden Indicated and Inferred JORC resource of 99,000 ounces at 5.7gpt. The Burbanks Mine poured its first gold in September 2015 under Kidman ownership and the recent extensive mine development has opened access to mineralised zones both in the Christmas open pit and Birthday Gift underground. Drilling has outlined further extensive gold mineralisation providing outstanding exploration potential for the project.

 

OPERATIONS

Burbanks Mine

The Burbanks Mining Centre has historical production of 366,340 ounces at an average grade of 13.9gpt from both open pit and underground sources. Historic drilling has defined several gold lodes which remain open in multiple directions with grades often exceeding 50 gram meters including an outstanding intersection of 4.69m @ 462.1 gpt including 10,300 gpt over 0.21m ( refer Figure 1 & 2 below)

The Burbanks project is located 8km south of Coolgardie, and is one of several historically mined deposits on the Burbanks shear zone.

This extensive north-east trending, steeply dipping structural zone extends over a distance of ~6km, is up to 100m in width and is hosted within a package of intercalated basalts, dolerite, gabbro and sediments. Three mineralised vein styles have been recognised at Burbanks: thin, subverticalto steeply east dipping highly boudinaged and attenuated quartz-carbonate veins surrounded by a distinct biotite-amphibole-chlorite-carbonate alteration assemblage, highly folded quartz veins hosted in fine to medium grained dolerite, and within veins of fine to medium grained garnetiferous diorite.

GEOLOGY

The Coolgardie district is located on the western side of the Archaean Norseman-Wiluna Greenstone Belt within the Coolgardie Domain. Gold deposits in the Coolgardie district occur in a number of different host lithologies, including dolerites, gabbros, basalts, ultramafics and diorites. In the Tindals Mining Centre the gold deposits are hosted within basalt, ultramafic and diorite rock units. In the Greater Coolgardie area the gold deposits are hosted in dolerite, gabbro, basalt, ultramafic and, to a lesser extent, felsic intrusive rock units. At The Mount gold mine, near the town of Widgiemooltha, the deposit is hosted in basalt.

 

HISTORY

Gold was discovered in Coolgardie the year before the first find in Kalgoorlie. The discovery, in 1892, was at Fly Flat, near what was to become the Bayleys Reward deposit, by Bayley and Ford. The majority of historic mines targeted quartz lode deposits, with the Bayleys, Bonnievale and Burbanks mines being the most productive. The early prospectors also recognised that felsic-intermediate porphyritic intrusions were also a common host rock in the Coolgardie area. These styles of deposits were exploited at Tindals and Brilliant, with only significant historical production coming from Tindals.

The first modern exploration and mining in the Coolgardie area commenced in the late 1970s-early 1980s. This was when companies started to consolidate groups of tenements in the Coolgardie area that had previously been held by individual prospectors. Since 1892, historic and modern mining has produce in excess of 2.8 million ounces from the Coolgardie area. Modern exploration has used a combination of magnetic and electromagnetic geophysical techniques, soil geochemistry, geological mapping and RC and diamond drilling to extend known deposits and discover new ones.