Quarterly Activities Report
- High-priority drill targets defined
- Drill targets based on strong VTEM anomalies in recent survey as well as previous mineralised intersections
- NSW Government Co-operative drilling grants awarded
A VTEM survey (Versatile Time-Domain Electromagnetic geophysical system) was flown by Geotech Ltd of Canada over several priority prospects. VTEM is widely considered the best helicopter TEM massive sulphide detection and imaging tool with notable successes including the discovery of the Mallee Bull deposit in the Cobar Basin and the recently announced discovery of the Artemis deposit in Queensland by our major shareholder Minotaur Exploration (ASX:MEP) (see announcement dated 31 July, 2014 on Minotaur's website at http://www.minotaurexploration.com.au ).
High Priority Target - VTEM - Wilga Downs
The Wilga Downs prospect on EL 8136, lies 35km west of Byrock in an area believed to have potential for Tritton-type copper deposits; Tritton is a volcanogenic massive sulphide (VMS) deposit and is in the same geological setting, some 90km to the southeast. Tritton was discovered by ground EM (SIROTEM) and was also marked by a magnetic anomaly.
The Wilga Downs area features several distinct magnetic anomalies, one of which has been drilled with two holes: one in 1971 by AMAX and one in 1978 by CRAE. Both holes returned anomalous copper and zinc. Of the several EM conductive anomalies identified in the area by the VTEM survey, the most prominent is coincident with this magnetic anomaly. The top of the conductor has been modelled as a shallowly south-dipping plate that lies between and below the zone tested by previous drilling (Figures 1, 2 in link below). The anomaly is strong and persists from mid to late-response times suggesting a highly conductive zone possibly associated with sulphides.
High Priority Target - VTEM - Achaye
The Havilah base and precious metal project on EL 7391 is located approximately 20 kilometres southeast of Mudgee, central NSW. It lies within Silurian volcanics and volcaniclastic sediments of the eastern Lachlan Fold Belt, known to host high grade copper-lead-zinc-silver-gold VMS deposits such as Woodlawn and Captains Flat.
The VTEM survey area covered zones of previously identified base metal sulphide mineralisation, including the Achaye prospect where historic drilling had tested a SIROTEM anomaly (at A1 on Figure 3 in link below). Gossanous outcrops, old workings and copperzinc anomalism all have been recorded at surface along the NNW-SSE trending zone.
This trend was targeted by the 1979 drilling which intersected strongly anomalous copper (up to 1% over 1m) and zinc (up to 2.2% over 1m) associated with sporadic massive sulphide (pyrrhotite) mineralisation.
As well as confirming the A1 EM anomaly, the VTEM survey defined a stronger, deeper anomaly (A2 on Figure 3) around 400 metres west of Achaye. This new conductor has not been previously tested and represents a priority VMS target. The area will be followed up with soil and rock chip geochemistry as well as a ground EM geophysics survey to confirm the geometry and dip of the conductor prior to drilling. Ground EM survey configurations can detect extensions of EM anomalies at depth, not seen in the airborne VTEM system.
High Priority Target - Mt Jacob Gold
At Mt Jacob, on EL 8256, 40km west of Kempsey NSW, previous work has identified a stratabound occurrence of gold confined to a circular area with high temperature mineral growth, ringed by a magnetic anomaly (Figure 4). This gold occurrence is hosted in gritty conglomerate and features intersections of up to 88 metres at 0.4 g/t Au from surface (all drilling details were released in Thomson's quarterly of December 2013). Of 16 holes drilled within the area of the geochemical anomaly, all were gold mineralised and 12 ended prematurely, still in mineralisation. The gold-bearing conglomerate horizon is interpreted to overly an Intrusion-Related Gold (IRG) system.
Drilling is planned to target immediately below the best intersection to date (88m at 0.4 g/t Au from surface to end of hole) in the central part of the high temperature, gold and magnetic anomalies (Figures 4 and 5 in link below). This program is being supported by the NSW Government New Frontiers Co-operative Drilling Scheme. Land access formalities are being finalised.
Co-operative Drilling Grants
The NSW Government announced Thomson Resources as one of the successful applicants of the "New Frontiers Co-operative Drilling program". Three grants were awarded after rigorous examination of the proposals by government geologists. The grants are for up to half the direct drilling costs. Thomson was awarded grants for several of its prospects including Cuttaburra A, Cuttaburra B and Mt Jacob - all possible intrusion-related gold (IRG) systems.
Kidman Joint Venture
Kidman Resources (ASX:KDR) has had early success at the Browns Reef prospect, extending the known mineralisation by 650m (see ASX releases). This augurs well for the prospectivity of Thomson's adjacent tenements, being managed under joint venture by Kidman.
Thomson continued its program of reducing land holdings to focus on priorities. One tenement was relinquished during the quarter - EL 6630, and one reduced. Thomson now manages exploration over 1,590 square km over 16 wholly owned tenements. Four additional tenements with Thomson interests are being managed by Kidman Resources (ASX:KDR).
Exploration expenditure incurred during the quarter totalled $164,000. Cash at the end of the quarter was $467,000. Thomson Resources has no debt and has 73,027,701 shares on issue.
To view the quarterly report, tables and figures, please visit:
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.
Thomson Resources Ltd
Minotaur Exploration Ltd
Kidman Resources Limited