Dunav Resources Discovers the Yellow Creek Copper-Gold Porphyry: YCDD008 Intersects 380m @ 0.48g/t Au, 0.37% Cu (from 20m) an...
10 Aprile 2012 - 1:50PM
Marketwired Canada
Dunav Resources Ltd. (TSX VENTURE:DNV) (the "Company" or "Dunav") is pleased to
present an exploration update on its 100% held Tulare Porphyry Project located
in Southern Serbia, including drill results from the Yellow Creek and Kiseljak
copper-gold porphyry target areas.
"Late last year we drilled a hole (YCDD005) that we felt, showed the tremendous
potential of the Yellow Creek target area to host an additional copper-gold
porphyry center. This follow-up drill hole has clearly demonstrated that
belief," said James Crombie, President and CEO of Dunav. "We are currently in
the final stages of completing the nearby Kiseljak copper-gold porphyry resource
definition drilling program, following which all four diamond drill rigs will be
relocated to Yellow Creek to support the two diamond drill rigs which are
currently establishing the potential size and footprint of the newly discovered
Yellow Creek copper-gold porphyry-style mineralization. In addition, the first
deep drill hole completed into Kiseljak clearly indicates that the system
extends to, and remains open, at depth."
1. HIGHLIGHTS
-- Yellow Creek: YCDD008 returned the following strong to moderate
intercepts, calculated using a 0.19% CuEq cut-off grade:
----------------------------------------------------------------------------
From Interval Au AuEq CuEq
Hole ID (m) To (m) (m) (g/t) Cu (%) (g/t) (%)
----------------------------------------------------------------------------
----------------------------------------------------------------------------
YCDD008 20 400.0 380 0.48 0.37 1.22 0.61
YCDD008 406 416.0 10 0.21 0.24 0.70 0.35
YCDD008 426 667.0 241 0.36 0.37 1.10 0.55
YCDD008(i) 673 691.5(i) 18.5 0.29 0.24 0.77 0.38
----------------------------------------------------------------------------
-- 0.19% CuEq cut-off ($1,200/oz. Au, $3.50/lb. Cu), 5m minimum
composite length, 5m maximum internal dilution.
-- AuEq = ((Au g/t(i)38.58) + (Cu%(i)77.16))/38.58
-- CuEq = ((Cu%(i)77.16) + (Au g/t (i)38.58))/77.16
-- Diamond drill samples are PQ, HQ or NQ half core, using a nominal 1m
sampling basis and weigh approx. 3-6kg.
-- Assay method: Fire assay Au (50g); Cu by aqua regia digestion with
AAS finish.
-- Intercept widths do not necessarily represent true width.
-- No top cut applied.
-- ((i)) Drill hole terminates in mineralization i.e. mineralization
remains open at depth.
-- Kiseljak: KIDD040 was designed to test the depth potential of copper-
gold mineralization at Kiseljak approximately 350 meters below the
current level of drilling. The drill hole returned the following strong
to moderate intercepts and remains open at depth, calculated using a
0.19% CuEq cut-off grade:
----------------------------------------------------------------------------
From Interval Au AuEq CuEq
Hole ID (m) To (m) (m) (g/t) Cu (%) (g/t) (%)
----------------------------------------------------------------------------
----------------------------------------------------------------------------
KIDD040 11 312 301 0.73 0.56 1.85 0.93
KIDD040 318 620 302 0.38 0.39 1.17 0.58
KIDD040 626 657 31 0.26 0.32 0.91 0.45
KIDD040(i) 693 829(i) 136 0.22 0.31 0.85 0.42
----------------------------------------------------------------------------
-- 0.19% CuEq cut-off ($1,200/oz. Au, $3.50/lb. Cu), 5m minimum
composite length, 5m maximum internal dilution.
-- AuEq = ((Au g/t(i)38.58) + (Cu%(i)77.16))/38.58
-- CuEq = ((Cu%(i)77.16) + (Au g/t (i)38.58))/77.16
-- Diamond drill samples are PQ, HQ or NQ half core, using a nominal 1m
sampling basis and weigh approx. 3-6kg.
-- Assay method: Fire assay Au (50g); Cu by aqua regia digestion with
AAS finish.
-- Intercept widths do not necessarily represent true width.
-- No top cut applied.
-- (i) Drill hole terminates in mineralization i.e. mineralization
remains open at depth.
-- Resource definition diamond drilling (nominal 80 meter by 80 meter
surface grid spacing) on the Kiseljak copper-gold porphyry target area
commenced during May, 2011 and continues to confirm moderate to strong
porphyry-style mineralization within the currently identified 800 meter
by 300 meter diorite porphyry footprint outlined to date.
-- Dunav plans to be in a position to release an initial Canadian National
Instrument 43-101 Compliant Resource Estimate on the Kiseljak copper-
gold porphyry target area during August, 2012. Following receipt of the
Resource Estimate, Dunav will initiate a Preliminary Economic Assessment
on the Kiseljak copper-gold porphyry.
-- Dunav also plans to outline, with drilling, the economic potential of
the newly discovered Yellow Creek copper-gold porphyry.
-- Further, exploration will continue to follow-up an additional two target
areas on the property, which have shown good indications of porphyry-
style mineralization.
-- The Company has budgeted for 45,000 meters of drilling on the Tulare
Porphyry Project during 2012.
-- Dunav currently has six diamond drill rigs operating on the Tulare
Porphyry Project.
2. GEOLOGY AND MINERALIZATION STYLE
-- The Kiseljak and Yellow Creek porphyries represent typical calc-alkaline
copper-gold porphyry styles of deposit, with a subvertical pipe-like
geometry, intruded into amphibolite, biotite-schist and andesitic
volcanics/volcaniclastics.
-- The mineralized porphyry system is associated with a series of
hornblende-biotite-plagioclase-phyric porphyry dykes, which have been
divided into four suites based on texture and association with copper-
gold grade and alteration.
-- The porphyry-style mineralization occurs as stockwork and disseminated
zones. Mineralization within the potassic zone primarily comprises
quartz, chalcopyrite +/- magnetite veinlets (0.1 to 10 mm thick) with
subordinate bornite and disseminated chalcopyrite +/- bornite.
-- Variable and lesser amounts of digenite, chalcocite, covellite,
molybdenite and pyrite occur together with rare galena and sphalerite.
Magnetite occurs both as disseminations and in quartz veinlets.
-- Gold mineralization occurs as blebs within sulfides, particularly in
bornite and chalcopyrite. Gold grades correlate strongly with copper
grades.
-- The Kiseljak copper-gold porphyry measures some 800 meters by 300
meters, where it is exposed at surface, and has been traced to a
vertical depth of 800 meters to date. Both the porphyry and the
surrounding schist have been intruded by a series of generally barren,
intra-mineralization to late diorite porphyry phases.
-- Figure 1 shows a plan view of the Kiseljak and Yellow Creek copper-gold
porphyry target areas.
3. DRILLING AT YELLOW CREEK AND KISELJAK
Yellow Creek:
-- Exploration trenching on the Yellow Creek target during summer 2011
discovered a limited area of outcrop with porphyry-style, stockwork
quartz veining located approximately 800 meters southwest of the
Kiseljak target. Initial drilling (YCDD001) in this area returned 105.6m
@ 0.32g/t Au, 0.12% Cu (from 6.4m).
-- Exploration drilling to date has since been focused on attempting to
vector towards the potential center of the Yellow Creek porphyry system.
The Company believes that the recent strong, porphyry-style, mineralized
intersection at the end of YCDD005 (10.9m @ 0.70g/t Au, 0.41% Cu (from
397m)) indicated the potential for an additional copper-gold porphyry
center to exist within the Yellow Creek target area.
-- YCDD008: was collared approximately 90m vertically above drill hole
YCDD005 and was designed to follow-up the strong copper-gold porphyry-
style mineralization intersected at depth in YCDD005. The drill hole
intersected copper-gold mineralized diorite porphyry dykes within the
host volcanics (primarily crystal tuffs) before intersecting the 'top'
of the Yellow Creek porphyry at 53 meters down hole depth. The drill
hole continued to intersect moderate to strongly, mineralized and
potassic altered, diorite porphyry together with 'rafts' of metamorphic
basement (also mineralized) to the final hole depth of 691.5 meters. The
mineralization remains open at depth.
-- The Yellow Creek target area is associated with a stronger and larger
ground magnetic anomaly when compared to the magnetic anomaly associated
with Kiseljak (refer to Figure 1).
-- Refer to Table 2 for a summary of all Yellow Creek significant
intersections completed to date.
Kiseljak:
-- KIDD040 is an 'off-section' drill hole designed to pass through the
'higher grade' zone of mineralization which outcrops within the center
of the Kiseljak target. The upper portion of the drill hole intersected
301m @ 0.73g/t Au, 0.56% Cu (from 11m) and shows the excellent potential
for higher metal grades to be realized earlier in any potential
production scenarios.
-- KIDD040 was further designed to test the depth potential of the Kiseljak
copper-gold mineralization drilled to date. The drill hole has
effectively extended the previous depth of mineralization (approximately
450 meters below surface) by 45% to approximately 800 meters below
surface. The copper-gold mineralization remains open at depth.
-- Refer to Table 1 for a summary of all Kiseljak significant intersections
completed to date.
-- Refer to Figures 1 and 2 for the location of all diamond drilling to
date together with a representative cross-section through the Kiseljak
target area.
4. DISCUSSION
-- The Tulare Porphyry Project area lies within the Lece Volcanic Complex
of southern Serbia; the second largest magmatic complex in Serbia after
the Timok Magmatic Complex. The Tulare licence area has been previously
mapped by Government agencies and this work also included geochemical
and geophysical surveys.
-- The most significant prospect defined during this phase was the Kiseljak
copper-gold porphyry occurrence, which was originally drilled
predominantly during the 1980s, culminating in an historical resource
estimate that is not compliant with Canadian National Instrument 43-101
("NI 43-101"). In total, thirty-two vertical diamond drillholes, ranging
from 109 meters to 450 meters depth, were completed at the Kiseljak
North zone between 1969 and 1990.
-- The Tulare project is located in southeast Serbia, approximately 230km
from Belgrade and 70km from the regional centre of Nis. Access to the
project is excellent via sealed roads. A rail heading is available some
45km from the project area at the city of Leskovac, or 25km to the
northwest at the town of Kursumlija. Reticulated power passes close to
the project area.
-- Preliminary metallurgical test work from Kiseljak, carried out in 2008
at SGS Lakefield in Toronto, Canada, has indicated that very high copper
and gold recoveries are potentially achievable using typical grind
sizes. Excellent flotation recovery characteristics were exhibited for
both copper and gold, and a copper-gold concentrate with no deleterious
elements was produced. Preliminary grinding test work showed a medium to
soft mineralization type with a bond work index of approximately
11kwhr/t. Further metallurgical test work is planned.
-- Dunav continues to progress the Kiseljak resource definition diamond
drilling program to fully define the overall size and economic potential
of the Kiseljak copper-gold porphyry deposit.
-- Additionally, Dunav plans to thoroughly drill test the newly discovered
Yellow Creek copper-gold porphyry target area in order to determine the
economic potential of this area within the Tulare Porphyry Project.
-- Please see the following link to view all Kiseljak and Yellow Creek
drill holes located spatially in three dimensions:
http://www.corebox.net/properties/tulare-porphyry-project
5. SAMPLING AND ANALYSIS
The majority of soil samples have been assayed at the ALS Chemex laboratory,
Perth, Australia. More recent soil sampling programs have been assayed at the
SGS managed laboratory at Chelopech in Bulgaria using a combination of ICP-OES
and ICP-MS, whereas gold has been assayed by low level detection fire assay
method (50 gram sample charge) with an AAS finish. Trench samples were prepared
at the laboratory facility at SGS Bor and the samples have been assayed at the
SGS managed laboratory at Chelopech in Bulgaria or the SGS managed laboratory
facility at Bor. Diamond drill core has been prepared at the laboratory facility
at Bor and assayed at either the SGS managed laboratory at Chelopech in Bulgaria
or the SGS managed laboratory at Bor. Trench and diamond drill samples have been
assayed for gold by 50 gram fire assay with an AAS finish whilst copper, silver
and molybdenum have been analysed using an aqua regia digest with an AAS finish.
A one metre sampling interval has been used where possible for the Tulare
Porphyry Project diamond drilling program. Half core is routinely submitted to
the laboratory for analysis. Following Dunav standard quality assurance
procedures, a full suite of field and laboratory duplicates and replicates along
with internationally accredited standards and blanks, have been submitted with
each batch of samples.
Trench sampling was carried out as channels in the wall just above the trench
floor on 2 meter intervals. Except where extensive soil cover is encountered,
trenches were sampled in their entirety. The samples were routinely weighed
prior to final bagging to maintain an even sample size and to avoid sampling
bias in harder rock types. An average channel sample weight was maintained at 3
kilograms per meter, which produces a consistent sample weight approximating
half HQ core samples. Field duplicate samples were taken every 20 samples and
known standards were inserted into the sample stream after every 20th sample. A
geological and structural log was completed as for diamond drilling. All data
collected in the field was routinely entered into geology and structural geology
spread sheets using Field Marshal software for subsequent entry to an acQuire
database and validation.
Dr Julian F. H. Barnes, a qualified person under NI 43-101, the Company's
Special Consultant, has supervised the preparation of the technical data in this
press release.
Previously released data refers to data included in the "Tulare Project, Serbia
National Instrument 43-101 Technical Report" by Paul Mazzoni dated November 22,
2010 (the "Technical Report"), filed on SEDAR at www.sedar.com. Further
information in respect of results, investigations, interpretations, quality
assurance and quality control measures, along with geology, mineralogy,
sampling, and analytical procedures is included in the Technical Report.
About Dunav Resources Ltd.: Dunav Resources is a mineral exploration company
focussed on the acquisition, exploration and development of mineral properties
in Serbia. Additional information about the Company is available on SEDAR at
www.sedar.com and at www.dunavresources.com.
Dunav is well-capitalized, with approximately $7.5 million in its treasury at
March 31, 2012, which it plans to use for the exploration and development of its
mineral projects in Serbia. Dunav's issued and outstanding share capital totals
104,017,749 common shares, of which approximately 45.4% is held by Dundee
Precious Metals Inc.
Cautionary Statement
This press release contains forward-looking information. In particular, this
press release contains statements concerning exploration results and geological
interpretation, planned exploration programs, completion of a resource estimate
and preliminary economic assessment, and the geological and economic potential
of the Tulare Porphyry Project. Although the Company believes in light of the
experience of its officers and directors, current conditions and expected future
developments and other factors that have been considered appropriate that the
expectations reflected in this forward-looking information are reasonable, undue
reliance should not be placed on them because the Company can give no assurance
that they will prove to be correct. Forward-looking information is subject to
known and unknown risks and uncertainties, and depends on assumptions and other
factors, all of which may cause actual results or events to differ materially
from those anticipated in such forward-looking information. The forward-looking
statements contained in this press release are made as of the date hereof and
the Company undertakes no obligations to update publicly or revise any
forward-looking statements or information, whether as a result of new
information, future events or otherwise, unless so required by applicable
securities laws.
Maps and tables are available at the following address:
http://media3.marketwire.com/docs/Tulare_Exploration_Update.pdf
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