Thomson Resources reports more strong greisens from Bygoo tin project
Better results were 69.5m at 0.5% tin from 60m, including 2.5m at 2.1% tin.
Drilling at the new Stewarts discovery within the Bygoo tin project in New South Wales’ Lachlan Fold Belt has intersected further strong mineralised greisens for owner Thomson Resources (ASX: TMZ).
Four holes situated 300 metres northwest of the Bygoo Main Zone were completed to follow up an earlier intersection of 111m grading 0.45% tin from 57m depth.
Observed greisens were reported to differ in strength and mineralogy and varied from quartz-tourmaline to quartz-topaz, with patches of unmineralised granite between stronger greisen development.
Holes drilled under the shallow workings in the granite outcrop area returned weak intercepts of poorly-developed thin greisens.
Best results were 69.5m at 0.5% tin from 60m, including 2.5m at 2.1% from 70.6m and 10m at 0.9% from 83m; 36m at 0.2% tin from 100m, including 3m at 0.6% from 100m; 31m at 0.4% tin from 120m, including 6m at 1.0% from 123m; and 36.2m at 0.45% tin from 69m, including 7m at 1.7% from 98.4m.
Some of the intersections were separated by barren intervals of less altered granite, suggesting that the mineralisation is “feathering” and weakening towards the north.
Assay batches
Thomson executive chairman David Williams said he was pleased with the results so far.
“The tin grades are fantastic and it is interesting to see some copper coming into it as well,” he said.
“The expansion of the Stewarts zone we are seeing is great and shows the continuing potential of this tin project.”
Mr Williams confirmed three batches of assays had been received from Stewarts to date, with a fourth batch from the final three holes expected next month.
Positive results so far have indicated the potential for extensions to the mineralisation during the summer drilling season.
First five holes
In June, Thomson announced drilling of the first five holes at Stewarts had intersected strong mineralised greisens.
Wide intercepts were reported including 17m at 0.9% tin from 129m; 23m at 1% tin from 62m; 39m at 0.4% tin from 89m; and 13m at 0.4% tin from 45m.
Mr Williams said the results validated the prospectivity of the “largely-untapped” Lachlan Fold Belt.