Thomson Resources Limited (ASX:TMZ) Drilling Indicates Discovery Of An Intrusion-Related Gold System
Sydney, Nov 7, 2011 AEST (ABN Newswire) - Thomson Resources Limited (
ASX:TMZ) has received assay results from two further holes on the Cuttaburra Trend. A significant gold result (2.5 g/t over 0.5 metres), the intersection of granite at Cut A, and the associated anomalous elements bismuth, tin and tungsten suggest an additional exploration model may be appropriate to this area.
The intrusion-related gold deposit is a relatively new classification of gold deposits and is associated with granitic rocks. This type of mineral system is now well documented in the scientific literature and includes a number of important deposits in the Tintina Gold Belt in Alaska (e.g. Fort Knox 158 million tonnes at 0.8 g/t Au and Pogo 10 million tonnes at 15 g/t Au). The deposits are best developed above and surrounding small, granitic intrusions.
The setting, mineralisation, vein style, pluton size and associated anomalous elements all indicate that an intrusion-related gold system is a valid exploration model for the Cuttaburra A prospect and can probably be applied more widely in the region. The mineralisation and associated anomalous elements are similar. Anomalous bismuth, tin, and tungsten are particularly indicative. The sheeted vein nature of the mineralisation at Cuttaburra is also typical of intrusion-related gold systems. The size and geometry are appropriate to the model - all of the magnetic anomalies so far tested are of approximately 1 square kilometre in size, although larger anomalies are also present. The host rocks however, are interpreted to be an extension of the sedimentary rocks hosting the major Cobar-type deposits further south.
Thomson Resources will continue to assess the potential for Cobar-type deposits but the recognition of this new model has substantially broadened the exploration opportunities available to the Company. Thomson has now concluded its first phase of drilling (2,929m) at the Cuttaburra Project. The latest hole (CutBD03) ended at 214.8m after intersecting pyritic and graphitic sediments that explain the targeted IP anomaly.
Sphalerite (Zn) bearing veins were intersected, but only over narrow widths. This indicates the new hole is further away from the centre of mineralisation than the previous drilling. Downhole geophysics will be carried out as well as whole rock geochemistry and petrology to further enhance exploration models and targets.
For the complete Thomson Resources announcement including tables and figures, please view the following link:
http://media.abnnewswire.net/media/en/docs/ASX-TMZ-655885.pdf
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.
| ||
|
