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Godolphin eyes potential for more high-grade copper under historic Goodrich mine
Special Report: Diamond core drilling has confirmed near surface, high-grade copper mineralisation at the Goodrich prospect at Godolphin Resources’ Yeoval…
- Assay results have confirmed high-grade, copper mineralisation at Godolphin’s Goodrich prospect
- The Goodrich mine produced copper and gold between 1868 and 1912 and was the largest mine in the area
- GRL believes the mine could host more high-grade mineralisation at depth
- Detailed data review now underway following first high grade-assays
Diamond core drilling has confirmed near surface, high-grade copper mineralisation at the Goodrich prospect at Godolphin Resources’ Yeoval project in NSW.
The historic Goodrich mine was the largest copper-gold producer in the district between 1868 and 1912, with an open pit and small underground operation producing an estimated 300 tonnes of copper, 159kg of gold, and 62kg of silver.
Mineralisation within the mining envelope was associated with an upper zone of ‘QMC’ lodes in a breccia pipe above a lower ‘crown’ zone – breccia pipes, or ‘chimneys’ being a common host rock for copper ore.
Historical rock chips of lode material of up to 2.33% copper and 3.26g/t gold have been reported.
The assays from this two-hole diamond core drill program returned high grade copper-gold veins including 91m at 0.18% copper and 0.15 g/t gold from 152m to 243m. The includes sections of 8m at 1.02% copper and 0.79 g/t gold from 152m to 160m; and 2.55m at 1.47% copper and 1.83 g/t gold from 216m to 218.55m amongst other hits.
“We are highly encouraged by the quality of these assay results, which confirm that our drill program intersected high-grade copper and gold just over 150m from surface,” Godolphin Resources’ (ASX:GRL) MD Jeneta Owens said.
Potential for more high grade at depth
More notable copper-gold assays include:
- 8m at 1.02% copper and 0.79 g/t gold from 152m to 160m; and
- 55m at 1.47% copper and 1.83 g/t gold from 216m to 218.55m.
The drilling also intersected high grade copper-gold-molybdenum veins and broader disseminated copper-gold in porphyritic granodiorite including 80m at 0.10% copper and 0.13 g/t gold from 57.80m – 138m, including:
- 6m at 0.32% copper and 0.36 g/t gold from 131m to 137m;
- 1m at 0.69% copper and 1.04 g/t gold from 84m to 85m; and
- 5m at 2850ppm molybdenum from 144.50m to 146m.
The known vertical extent of copper mineralisation has now been extended by ~30m and the strike length of the mineralisation has been extended by around 60m to the south-east of the historic Goodrich mine and associated drilling areas.
Plus, higher copper grades were encountered in veins of QMC material and imply extensions to the known breccia hosted mineralisation further down-dip as identified in drilling completed by Malachite Resources back in 1999.
Pic: Diamond drillhole GGDD001 at Goodrich prospect targeting extensions to mineralisation underneath the open cut and shaft. Source: GRL.
“The near-surface nature of these intercept point to the potential of the Goodrich prospect to host further zones of high-grade copper and gold mineralisation at depth,” Owens said.
“In addition, the drill program identified mineralisation just 100m from the previously identified deposit which remains open to the south and east.
“This proximity provides Godolphin with a sound framework to identify additional exploration targets for future follow-up drilling.”
Future follow-up drilling on the cards
A detailed review of all drillhole and assay information, in conjunction with geological modelling, will now be completed to better understand the nature and extent of both types of mineralisation underlying the mining envelope and historical drilling.
The aim of the review will be to identify the potential for economic mineralisation at Goodrich, which in turn could spur further drilling and potential downhole geophysics.
“Our team will now work on a detailed review of all data to determine what next steps need to be undertaken to determine the potential of the high-grade copper at this exciting prospect,” Owens said.
This article was developed in collaboration with Godolphin Resources, a Stockhead advertiser at the time of publishing.
This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.
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