Lyndbrook (Running Brook and Galala) - Overview
Located in North Queensland, 150km south-west of Cairns, the area covered by the Lyndbrook group of tenements was originally highlighted by Auzex's prospectivity modelling studies. Key targets within this group include the Galala Range Mo prospect and Running Brook Cu-Au prospect.
Galala Range Mo-W-Au prospect
Key Points
- Assay results from a third phase nine hole (884m) drill program were very encouraging highlighting continuity of mineralisation over a 600m by 400m area and confirming the potential for a sizeable molybdenum resource at shallow depth.
- In July 2006, a 33 hole first phase RC drill program for 2,838m was completed at Galala over a 2km by 1.5km area. Twelve holes intersected significant widths of tungsten-gold or molybdenum mineralisation at shallow depths. However, the focus became the molybdenum core with better intersections including 14m @ 0.15% Mo from 15m.
- Two additional holes (388m total) were drilled in November 2006 focusing on the molybdenum core. Both holes intersected near surface Mo mineralisation with results up to 5m @ 0.2% Mo.
- A further nine holes (for 884m) were drilled in 2007, with results confirming continuity of mineralisation. All holes intersected significant molybdenum mineralisation including 17m at 0.13% Mo from 30m and 7m at 0.13% Mo from 38m.
- Drilling is planned to infill the area identified to date and to extend mineralisation to the east and south.
The Galala Range prospect occurs within a large alteration system forming a NE trending zone of sericite-silica alteration measuring 6km x 4km. Mineralisation consists of 0.5cm to 1.5m wide flat-dipping quartz veins within a sericite-silica altered biotite-muscovite granite. A review of the geology suggests the source of the metals is interpreted to be a shallow buried Late Carboniferous granite.
Running Brook Cu-Au prospect
Key Points
- Infill and extension soil sampling has been completed with highly encouraging gold and copper anomalies being defined.
- Best rock chip samples included a maximum 3.12g/t Au and 8.17% Cu.
- A series of trenches were then completed with a best result of 150m at 0.26g/t gold. A drill program targeting this trench anomaly returned wide zones of low grade uneconomic gold mineralisation.
- A ground magnetic survey was completed in late 2007 and the results used to possibly target a second phase drill program in late 2008.
The Running Brook prospect is located north of Mt Surprise with initial soil sampling identifying anomalous gold and copper. A 30ppb Au in soil anomaly was defined over a 1km x 300m area. Sampling also highlighted a 150ppm Cu in soil anomaly measuring 1km x 500m that partially overlaps the gold in soil anomaly to the north.
Results from follow-up sampling confirm the prospectivity of the region with coherent gold and copper anomalies defined over 900m x 200m and 1,700m x 800m areas respectively. The anomalies overlap but are offset from each other. A series of costeans are being excavated across both anomalies to help with geological mapping.
Other Lyndbrook prospects
A number of other multi-metal targets have been identified within the Lyndbrook group. These include the Whistler molybdenum prospect, gold-tungsten prospects at Burlington and Castle, and tin-tungsten prospects at Frenchy Creek, Stormer, Geaney's, Four Mile Camp and Kangaroo Rat.
