New Higher Grade Gold and Copper Discoveries Expand Kincora’s Trundle Project
Kincora drilling has now nearly double strike gold-copper mineralization over 1.3km at the Trundle Park prospect, which remains open, and from near surface to 750m depth, the latest results reveal new higher grade zones.
Kincora Copper (ASX:KCC) has found new evidence that it is drilling in a large-scale Macquarie Arc porphyry system at its Trundle project in the highly fertile Lachlan Fold Belt in New South Wales, with new drilling results comparing favorably to those of Newcrest Mining (ASX:NCM) Operation Cadia and the neighboring Northparkes mine.
Drilling hit three new zones of mineralized skarn in the most recent hole (TRDD029), with the combined interval returning some 213m.
So far, Kincora has only received assays for the upper skarn (the first zone), but this has returned a higher grade of 36m at 0.68 grams per tonne (g/t) gold and 0.29% copper (1.17 g/t gold equivalent), including 4m at 1.19g/t gold and 0.59% copper (2.19g/t gold equivalent) from 732m.
While it is prudent to call grades from the other two mineralized intervals and the skarns before assay results return, expected in about five weeks, Kincora says the middle skarn zone is thicker at 139.3m of visual breadth, with “abundant visual chalcopyrite” and with very beautiful -Look at the base photos in the press release.
This bodes well for favorable copper and gold grades, and grades potentially higher than those already announced for TRDD029.
However, to put the assay results for the upper skarn zone into perspective, grades are already accumulating well relative to Cadia. Last reported quarter produced at a head grade of 0.82 g/t gold and 0.35% copper (1.41 g/t gold equivalent) with an all-in sustaining cost margin of $1,519 per ounce (that’s a profit!) of Cadia East porphyry.
Kincora said this illustrates the favorable economic potential of bulk mining operations in the Macquarie Arc at depths similar to the mineralized zones of TRDD029.
Technical committee chairman John Holliday, ex-Newcrest explorer and discoverer of Cadia, said hole TRDD029 has yielded very encouraging analytical and visual results in recently discovered magnetite skarn zones typical of porphyry systems. by Macquarie Arc.
“TRDD029 opens up significant exploration space to the south, east and west of previous drilling,” he noted.
“This hole has confirmed and expanded a very large mineralized system at Trundle Park that hosts the potential for a group of higher grade skarn and porphyry intrusion bodies.”
Skarn deposits generally form on the periphery of mineralizing fluids from porphyry systems. While skarns can support significant mining operations in their own right, they are more often developed concurrently with the causative intrusion and porphyry deposit(s), which are generally of a greater magnitude in tonnage than the skarn .
As shown in Kincora’s updated corporate presentation, the Cadia East porphyry to skarn ratio to the Little Cadia skarn is estimated at 28:1.
A well-mineralized interval over the cumulative total width of 213m of skarns returned in all three zones for hole TRDD029 would certainly suggest a potentially very significant causative porphyry intrusive source for these fluids.
Holliday said the next hole being drilled (TRDD030) at Trundle Park will provide a better understanding of new mineralized zones and coverage of the previously untested south trending approximately 1.3 km currently defined mineralized system.
Hole TRDD029 was drilled to follow the nearer surface intrusion potential recognized in the previous drill hole, as well as to test the westerly and southerly strike for skarn and porphyry-type intrusion mineralization at depth in a area of very limited deeper drilling.
The full scan results for TRDD029, combined with bedding and true width data from TRDD030, will help plan further follow-up targeting.
This article was developed in conjunction with Kincora Copper, a Stockhead advertiser at the time of publication.
This article does not constitute advice on financial products. You should consider obtaining independent advice before making any financial decisions.