Further Outstanding Drill Results at Bygoo Tin
Sydney, April 21, 2016 AEST (ABN Newswire) - Thomson Resources Ltd (
ASX:TMZ) is pleased to announce drilling results from its third round of drilling at the Bygoo tin project near the Ardlethan tin mine, NSW. Five drill holes, including one diamond hole, were drilled to test the newly discovered tin-bearing greisens at Bygoo North as defined in drilling during 2015. In addition, three holes tested the Bygoo South prospect located 400m south of Bygoo North.
Highlights:
- Exceptional intercepts up to 11m at 2.1% Sn at Bygoo North
- Main greisen zone confirmed: open to east, west, and down dip
- New discovery - strong intersection at Bygoo South - 8m at 1.3% Sn
High grade tin intersections of similar tenor to those previously recorded were obtained at Bygoo North. The standout intersections are as follows -
- 11m at 2.1% Sn from 78m depth (BNRC20)
- 8m at 1.7% Sn from 121m depth (BNRC19)
- 4m at 2.4% Sn from 97m depth (BNRC18)
- 9m at 0.7% Sn from 141m depth ((BNRC19)
- 3m at 0.5% Sn from 65m depth (BNRC20)
Drilling at the new Bygoo South Prospect recorded a high grade intersection down-dip from old workings -
- 8m at 1.3% Sn from 57m depth (BNRC21)
Bygoo North
Thomson targeted the latest round of drilling to firm the interpreted model of the high grade tin mineralisation and establish the true widths of the greisen zones.
The standout intercept from the 2015 drill program was 35m at 2.1% Sn in BNRC11, which was modeled to be largely "down-dip" or oblique to the trend of the mineralisation (TMZ ASX Release dated 21 Oct 2015). A new hole, BNRC20, drilled in the opposite direction to BNRC11 (Figure 1 in link below) and intersected the same steeply north-dipping quartz-topaz greisen, at the same grade of 2.1% tin over a downhole length of 11m. The true width of the mineralised zone is interpreted to be between 8 and 12m (BNRC20 also intersected a weaker zone higher up the hole which may be included in the overall greisen zone).
The zone is open at depth and extends east-west at least 100m in strike - but is open in both directions and down-dip (Figures 2 and 3 in link below).
As part of the work program, accurate ("differential") GPS topographic data was collected, including the location of some old Cominco drill collars (1974-1977).
Analysis indicated that the historic drill collars have previously been positioned incorrectly, 35m to the northeast of their true location, which, when re-plotted, has resulted in the generation of a much simpler and more consistent E-W oriented corridor of mineralisation located entirely within the Ardlethan Granite (Figure 2 in link below).
Several intercepts, however still plot outside the main zone, including a recent hole (the lower, northern intercept in BNRC13). There is a strong possibility that these intercepts represent greisens of as yet to be determined strike and dip, and more drilling is required.
A further drill program is planned to define and extend the central greisen and target those high grade intersections that lie outside the main zone.
Bygoo South
Three holes were drilled at a new prospect - Bygoo South, 400m south of the Bygoo North area. This prospect is at the site of a historic underground mine which operated between 1932 and 1946 for a reported production of just over 10,000 tonnes of ore at 0.8% Sn (Department of Mines Mineral Resources Report No. 20). The prospect had previously been drilled in 1974 with three holes that were located too far north and south of the mine to be effective.
Thomson's drilling program was based on a cross section of the workings published from 1939 (Mines Record no. 2594 - Figure 4). The drilling proved successful with an 8m intersection grading 1.3% Sn from 57m hole depth (BNRC021), down-dip from the workings. This intersection is highly encouraging as it defines a new area of high grade mineralisation close to Bygoo North and indicates that additional zones of tin mineralisation may be defined further to the south towards the Ardlethan tin mine with the fertile Ardlethan granite. This prospect clearly demands further drill testing.
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About Thomson Resources Ltd
Thomson Resources Ltd (ASX:TMZ) is an NSW active mineral explorer. Thomson has several tin projects (including an advanced project near Ardlethan), as well as gold, copper and zinc targets in a range of settings. Thomson has a good record of discovery, with multiple new Intrusion-Related Gold (gold with copper, lead, zinc, molybdenum, tungsten) systems discovered in the Thomson Fold Belt in the NW of the state.
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