Strongly Indication Of Proximity To Core Of Large Porphyry Intrusive System
Kincora Copper Ltd (TSXV and ASX:KCC) believes it is on target to uncover a significant porphyry system after obtaining further positive assay results from ongoing drilling at the brownfield Trundle Project, located in the Macquarie Arc of the Lachlan Fold Belt (LFB) in NSW, Australia.
John Holliday, Technical Committee chair, and Peter Leaman, VP of Exploration, said the wide interval of gold and alteration in TRDD022, and the extensive strike (over 500m) of near surface skarn mineralisation seen in earlier holes, are strong evidence of a large multiple intrusive porphyry gold-copper system at the Trundle Park prospect.
“Hole TRDD022 is highly encouraging in that we are potentially very close to our porphyry target. A follow up hole is drilling to the NNW of TRDD022 for the potential higher grade and interpreted core of the targeted system.”
Detailed geological logging of TRDD022 has taken place and noted that the better mineralized zones exhibit interpreted fingers of monzonite intruding a main monzodiorite, in areas brecciated, with strongly developed and variable interpreted outer potassic alteration.
This setting coupled with returned mineral tenor, particularly gold intervals, provides indicators of a proximal environment to the targeted core of an intrusive porphyry system. The multiple intrusive deposits at the neighbouring Northparkes mine and at Cadia- Ridgeway exhibit such a setting around a discrete mineralised footprints of only hundreds of metres width that are vertically extensive and occur in clusters or a series of deposits.
Two rigs remain operational, one currently drilling a scissor hole to TRDD022 at the Trundle Park prospect at Trundle, and the other has commenced a second hole at the Gateway prospect at the Fairholme project. Trundle and Fairholme are both advanced exploration stage projects with hallmarks of neighbouring deposits, Northparkes and Cowal respectively, host to a combined >20Moz gold and >5Mt copper.
Trundle Park prospect
Kincora’s drilling at Trundle Park has focused on simultaneously testing both the near surface skarn mineralisation and underlying causative porphyry source(s), advancing and confirming our working geological model beyond prior explorers’ shallow drilling (average historic depths of only 28m).
Improved geological understanding has provided the confidence and vectors to drill to comparable depths to where the core of similar intrusive systems occur elsewhere in the wider and immediate region, at Cadia and Northparkes respectively. Hole TRDD022 was completed to 940m, the deepest hole at the Trundle Park prospect.
TRDD022 followed up several previous holes that returned potassic alteration with anomalous gold mineralisation, and which now opens up a large previously untested zone to the west and north.
Assay results have been returned for TRDD022 with significant broad mineralized intervals including 162m @ 0.25 g/t gold, 0.04% copper and 9 ppm molybdenum (from 670m), comprising 46m @ 0.54 g/t gold and 0.08% copper (from 684m) and 18m @ 0.75 g/t gold and 0.09% copper (from 712m).
Detailed geological logging has taken place and noted that the better mineralized zones exhibit generally centimeter scale interpreted fingers of monzonite vein-dyke and associated mineralization intruding the main monzodiorite intrusion.
Magnetite stringer veins have also been noted to be associated with pyrite and epidote replacing mafic minerals in the monzonite vein-dykes. Chalcopyrite is present in stringer veinlets on its own and also occurs as blebs or stringer veinlets with pyrite or magnetite.
The immediate focus of drilling at Trundle Park is the recently commenced TRDD026, the initial diamond drill ‘scissor’ hole to follow up TRDD022, which is seeking to test the potential for higher grade copper-gold and the interpreted core of the system, approximately 100m NNW from the mineralization zone in TRDD022.
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