|Project||Province||JV Partner / Manager||Target Type / Comments|
|Mt Eureka||North Eastern Goldfields, Yillgarn Craton WA||Cullen Resources||Structurally controlled|
The Mt Eureka Project (in the North Eastern Goldfields) is located ~90km E of the Yandal Gold Belt. It covers approximately 450 sq km of highly prospective granite-greenstone terrane that, unlike the Yandal Belt to the west and the Duketon Belt to the south -east, to date has not produced a major gold deposit.
Cullen discovered significant gold mineralization at the Southern Prospect (2m @ 10.0 g/t from 50m and 7m @ 9.0 g/t Au from 116m in hole MERC 74; and 9m @ 6.2 g/t Au from 98m in MERC 75) in shallow dipping quartz lodes hosted by mafic rock but lacking continuity.
Cullen has been progressively reviewing the extensive database, and has undertaken field assessments of the nickel and gold prospectivity of its project in the Eureka greenstone belt Regional data and models for new minerals discoveries by others, such as “Rosie” – nickel (Duketon Mining) and “Garden Well” – gold (Regis Resources) in the Duketon greenstone belt, and at Mt Fisher (Rox Resources), have been taken into consideration when identifying priority target areas for drilling at Eureka (see Figure) as follows:
- The northern and southern extensions of the Eureka North West mineralisation, where previous intersections of gold in conglomerate include: 8m @ 2.92 g/t Au. The conglomerate/greenstone contact is interpreted to continue for some 10km to the north and has not been tested by systematic drilling to date;
- The northern and southern extension of the Taipan shear zone – the Taipan target area has a best drill intercept of 22m @ 2.1 g/t Au, including 6m @ 5.0 g/t Au. It is a robust mineralised system of quartz veining, pyrite and carbonate alteration hosted by sheared mafic schists over a strike length of 700m and up to 100m wide (91m @ 0.3 g/t Au in “DDH1″ from 133m) and open to the north and south; and,
- The Southern – Southern Extended shear zone under cover to the north east including previous drill anomalies in air-core of 24m @ 1.0g/t Au and 32m @ 0.2 g/t Au for follow-up, and to the south to Galway and beyond.
The Galway Gold Prospect
This prospect was discovered by RAB/air core drilling across a gold-in-lag geochemical anomaly in 2001. A review of the tenor and position of this anomaly on Cullen’s aeromagnetic interpretation and regolith maps shows a major NW-SE alluvial channel lying south of Southern which overlies a number of interpreted intersecting structures. It is notable that a number of gold-in-lag gold anomalies sit at the margin of this channel and are controlled by structures, suggesting that other such geochemical anomalies may have been “stripped out”.
The position of Southern and other truncated geochemical anomalies suggests that numerous north and NW-SE trending shear zones and thrusts mapped beneath the alluvial channel are prime targets for gold. Although there have been some previous RAB and aircore traverses drilled in the channel, most holes are too shallow and too widely spaced to have effectively tested this area.
It is notable that the Garden Well gold deposit in the Duketon greenstone belt sits on the margin of a Tertiary palaeochannel, and that the Bronzewing gold deposit in the Yandal greenstone belt was discovered beneath thick, transported overburden.
Cullen has further prioritised the targets: the NW-SE structure which hosts the Galway prospect, only lightly explored, and the parallel structure directly beneath the alluvial channel are key targets for the next drilling programme (see Figure).