Newly discovered higher-grade zones expand the large-scale gold-copper system at Trundle Park
Newly discovered higher-grade zones
expand the large-scale gold-copper
system at Trundle Park
• Ongoing drilling at Kincora's Trundle Park prospect has yielded
significant encouragement. Three zones of mineralised skarns
have been intersected in most recent hole TRDD029. The
cumulative mineralised interval amongst the three units
totals some 213m.
• Assay results are only available for the Upper skarn which has
returned 36m @ 1.17 g/t gold equivalent1. Remaining results
are due in approximately 5 weeks.
• Notable mineralised skarn intervals encountered in TRDD029
are:
o Upper skarn: 36m @ 0.68 g/t gold and 0.29% copper
from 732m, including 4m @ 1.19 g/t gold and 0.59%
copper (2.19 g/t AuEq1) from 732m
o Middle skarn: 139.3m intersected between 826.7-966m
interpreted to host multiple zones with abundant visual
chalcopyrite (assay results pending)
o Lower skarn: 37.7m intersected between 981.3-1019m
(assay results pending)
• Gold-copper mineralization now confirmed over a ~1.3 km strike
and open
• Follow up hole TRDD030 is ongoing, testing the up and down dip
extent of the Upper skarn zone in TRDD029 and for a causative
porphyry intrusion
• Assay results returned for TRDD028 have returned multiple
broad lower grade gold zones
MELBOURNE, Australia, Jan. 25, 2022 /CNW/ - Kincora Copper
Limited (the Company, Kincora) (TSXV: KCC) (ASX: KCC) is pleased
to provide an exploration update from ongoing drilling at Trundle Park
prospect situated 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, noted:
"Hole TRDD029 has returned very encouraging assay and
visual results in newly discovered magnetite skarn zones typical
of Macquarie Arc porphyry systems. We eagerly await assay
results for the remainder of the hole.
TRDD029 opens up a significant search space south, east and
west of previous drilling. This hole has further confirmed and
expanded a very large mineralised system at Trundle Park that
hosts the potential for a cluster of higher-grade skarn and
porphyry intrusion bodies.
Despite recent rain, good drilling metres are being achieved.
Ongoing hole TRDD030 will provide a better understanding of
the new large mineralised zones returned in TRDD029 and
coverage of the previously untested southern strike of the
currently defined ∼1.3 km mineralised system at Trundle Park."
An updated corporate presentation, including further details on the
Trundle project and recent drill results, is available at
www.kincoracopper.com
Figure 1: Examples of key mineralised zones in hole TRDD029 -
Trundle Park prospect2
(a) i. Upper skarn: @ 735m within 734-736m @ 1.94 g/t gold & 0.94% copper, comprising: prograde garnet (olive)-magnetite
(black)-pyrite (dark yellow)-chalcopyrite (yellow), cut by later retrograde carbonate (tan iron carbonate and white calcite)-
hematite (red)-chalcopyrite (yellow)
ii. Upper skarn: @ 757.4m within 756-758m @ 0.96 g/t gold & 0.48% copper, with a similar mineralogy description and
paragenesis as mentioned in Figure 1 (a) i.
(b) i. Middle skarn (assay results pending): @ 828.6m LHS (towards contact with the overlying limestone unit and Middle
Skarn unit with chalcopyrite clots of up to 5%) & @ 858m RHS (garnet-magnetite-pyrite-chalcopyrite)
ii. Middle skarn (assay results pending): @ 877.6m, predominantly with magnetite (black)-garnet (olive)-disseminated
pyrite (dark yellow) and disseminated chalcopyrite (yellow)
iii. Middle skarn (assay results pending): @ 892.4m LHS (garnet-magnetite-pyrite + disseminated chalcopyrite) & @ 905m
RHS (magnetite-garnet-pyrite-chalcopyrite, cut by iron carbonate-calcite with clots of chalcopyrite)
iv. Middle skarn: @ 940.3m (assay results pending): magnetite (black)-garnet (olive)-disseminated pyrite (dark yellow) and
disseminated chalcopyrite (yellow).
(c) i. Lower skarn: @ 984.6m (assay results pending): developed in crystalline limestone (light-grey) with disseminated
magnetite (black)-pyrite (dark yellow)-chalcopyrite (yellow) and hematite (red) along with later carbonate fill (white).
1 gold equivalent calculated @ US$1834/oz gold and US$4.52/lb copper with 100% recoveries
2 Photos of selected intervals which are not representative of the mineralization hosted on the whole property or Trundle Park
prospect but are of the alteration and lithology's intersected in the mineralised zones in these sections of drill hole TRDD0 29, and
current working geological interpretation presented in Figure 2.
There is insufficient drilling data to date to demonstrate continuity of mineralised domains and determine the relationship b etween
mineralization widths and intercept lengths. True widths are not known.
Figure 2: Significant new mineralised zones intersected in
TRDD029 with gold-copper mineralization now confirmed over
∼1.3 km strike and open at Trundle Park
(a) Plan view of Trundle Park prospect, multiple visually significant mineralised zones in TRDD029 and
ongoing hole TRDD030 - see Figure 2 (b) & (c) for sections
(b) Working Leapfrog alteration model and section of the Trundle Park prospect
(Section line looking southeast through Figure 2 (a). Length ~1450m and width ~600m)
(c) Key alteration and intrusions with significant mineralised intervals/holes
Illustration of strike/down dip target of TRDD030, noting collar distance to TRDD029 is ~685m
(Section line looking southeast through Figure 2 (a). Length ~1450m and width ~600m)
Drill hole TRDD029
Hole TRDD029 followed up the nearer surface intrusion potential
recognized in TRDD028 (latter announced December 6, 2021 release
"Porphyry system extended to surface and depth at Trundle Park"). It
was also designed to test the western and southern strike for both
skarn and porphyry type intrusion mineralisation at depth in a region of
very limited deeper drill coverage (one hole) situated across a
magnetic low, the eastern shoulder of a moderate magnetic zone and
along strike from the existing mineralised corridor at the Trundle Park
prospect.
While nearer surface intrusions are observed to occur from surface
and continuing westwards, they comprise: (a) micro-diorite (0-31.7m),
similar to those also identified in TRDD028, and (b) equi-granular
hornblende diorite (31.7-302m) which also includes some shorter
intervals with monzodiorite vein dykes (150-275m).
The most significant and positive development from TRDD029 was
intersecting multiple blind and new broad higher-grade skarn
zones. These zones exhibit good prograde skarn development,
characterised by garnet-magnetite-pyrite, within three notable
separate intervals: the Upper Skarn (732-772m); Middle Skarn (826.7-
966m); and, Lower Skarn (981.3-1019m) zones.
Importantly, each of these three zones had visible disseminate
chalcopyrite associated with the prograde skarn intervals, often with
magnetite and pyrite. Good examples of bladed magnetite were also
observed in the prograde skarn assemblages.
There is also a second stage of copper development noticed with
bleb-like chalcopyrite occurring in a retro-grade skarn stage with
carbonate (both iron-carbonate and calcite) along with orthoclase
(orange K-feldspar) and hematite (specular and bladed).
The retrograde skarn stages tend to fill in voids (i.e., as matrix fill
between breccias) and also along crosscutting veins throughout the
earlier prograde skarn stages. The Middle Skarn zone is interpreted to
host the more elevated levels of this second stage of copper
development relative to the Upper Skarn.
Furthermore, there are examples in hole TRDD029 where chalcopyrite
can be observed in both the prograde and retrograde skarn stages,
providing at least two identified pulses of fluids with copper bearing
sulphides within the skarn.
Above the skarns and below the aforementioned intrusions, porphyritic
andesite lava flows were noted with increasing silicification along with
epidote-chlorite-hematite alteration at depth, in-turn cut by later
carbonate quartz veins and/or as matrix fill along fractures with
chalcopyrite.
Significant assay results so far received for the Upper Skarn zone are
included in Table 1 with the core of the Middle, Lower Skarn zones
and balance of the hole delivered to ALS Orange, with results
expected in approximately 5 weeks (impacted by current congestion at
the laboratory).
The last reported quarters' production from Cadia (from Cadia East)
mined a head grade of 0.82 g/t gold and 0.35% copper (1.41 g/t
AuEq1) with an all in sustaining cost margin of $1,519/oz. This
illustrates the favorable economic potential of bulk mining operations
in the Macquarie Arc at not dissimilar depths to these mineralised
zones in TRDD029.
Macquarie Arc skarn deposits
Hole TRDD029 has returned very encouraging assay and visual
results in newly discovered magnetite skarn zones typical of
Macquarie Arc porphyry systems.
Skarn deposits may be formed peripheral to, and mineralising fluids
sourced from, porphyry systems and be represented by strongly
altered carbonate and/or volcanic hosts. Skarns deposits can support
significant mining operations in their own right but more often
associated also with a causative porphyry intrusion and
deposit(s). While no skarn deposits are currently being mined in the
Macquarie Arc, historically Big and Little Cadia, two deposits within
the Cadia mineral field, were mined very profitably for copper, gold
and magnetite, with other smaller similar occurrences having been
exploited in the region (including at Kincora's Trundle project).
The Northparkes mine is currently permitting the E44 gold-copper
skarn deposit to be trucked approximately 20km as a first potential
satellite operation to its existing porphyry deposits and mill. The E44
deposit is situated south and on the western margin of Northparkes
eastern section of the Northparkes Caldera, and potentially in close
proximity at the time of mineral deposition to Kincora's Trundle Park
prospect before the subsequent rifting of the Junee-Narromine belt
and Northparkes Caldera.
From further examples of and ratios between skarn and causative
porphyry deposits is included in an updated corporate presentation
available at www.kincoracopper.com
Drill hole TRDD030
Follow up hole TRDD030 has commenced as a scissor hole testing
the up and down dip extent of the Upper skarn zone in TRDD029 and
for a causative porphyry intrusion.
Despite recent rain, good drilling metres are being achieved and
TRDD030 will provide coverage of the previously untested southern
strike of the currently defined ∼1.3 km mineralised system at the
Trundle Park prospect.
Assay results for the remainder of TRDD029, with further bedding and
true width data from TRDD030 will assist the planning for further
follow up targeting along with TRDD029, opening up a new significant
search space along an identified magnetic and mineralised strike.
Drill hole TRDD028
Previously reported hole TRDD028 intersected nearer surface micro-
monzonite and micro-syenite intrusions (as confirmed by petrology)
within the first 400m of the hole, and also the presence of a deeper
level broad zone of monzodiorite cut by monzonite dykes occurring
below skarn. Assay results have returned multiple broad lower grade
gold zones – see Table 2.
Table 1: Trundle Park target hole 29 - Significant broad
mineralised intervals
(currently available)
Table 2: Trundle Park target hole 28 - Significant broad
mineralised intervals
Porphyry gold and copper intercepts are calculated using a lower cut of 0.10g/t and 0.05% respectively.
Internal dilution is below cut off; and, * Dilutions related with Core loss
Table 3: Trundle project - Collar Information
For further details, including QAQC procedures, please refer to the following press releases:
1. July 6, 2020 - Kincora announces high-grade gold-copper results from first hole at Trundle
2. July 23, 2020 - Kincora reports further strong encouragement at Trundle
3. September 3, 2020 - Kincora provides update on expanded drilling program at Trundle
4. November 30, 2020 - Kincora intersects broad mineralised zones at Trundle
5. January 20, 2021 - Kincora intersects further shallow mineralization at Trundle
6. March 2021 - Independent Technical Report for the ASX prospectus
7. April 22, 2021 - Exploration Update
8. July 8, 2021 - Exploration portfolio drilling update
9. August 17 2021 - Significant gold-bearing intervals at Trundle Park
10. December 7 2021 - Porphyry system extended to surface and depth at Trundle Park
11. January 2022 - Multiple broad higher-grade intervals at Trundle Park
Trundle Project background
The Trundle Project is located in the Junee-Narromine volcanic belt of
the Macquarie Arc, less than 30km from the mill at the Northparkes
mines in a brownfield setting within the westerly rift separated part of
the Northparkes Igneous Complex ("NIC"). The NIC hosts a mineral
endowment of approximately 24Moz AuEq (at 0.6% Cu and 0.2g/t Au)
and is Australia's second largest porphyry mine comprising of 22
discoveries, 9 of which with positive economics.
The Trundle Project includes one single license covering 167km2 and
was secured by Kincora in the March 2020 agreement with RareX
Limited ("REE" on the ASX). Kincora is the operator, holds a 65%
interest in the Trundle Project and is the sole funder until a positive
scoping study is delivered at which time a fund or dilute joint venture
will be formed.
For further information on the Trundle and Northparkes Projects
please refer to Kincora's website:
https://kincoracopper.com/the-trundle-project/
This announcement has been authorised for release by the Board
of Kincora Copper Limited (ARBN 645 457 763)
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Drilling, Assaying, Logging and QA/QC Procedures
Sampling and QA/QC procedures are carried out by Kincora Copper
Limited, and its contractors, using the Company's protocols as per
industry best practise.
All samples have been assayed at ALS Minerals Laboratories,
delivered to Orange, NSW, Australia. In addition to internal checks by
ALS, the Company incorporates a QA/QC sample protocol utilizing
prepared standards and blanks for 5% of all assayed samples.