Dunav Resources Confirms Strong, Near Surface, Porphyry-Style Copper-Gold Mineralization at Kiseljak, Tulare Project, Serbia
LONGUEUIL, QUEBEC -- (Marketwire) -- 09/07/11 -- Dunav Resources Ltd. (TSX VENTURE: DNV) (the 'Company' or 'Dunav') is pleased to present an update on drill and trench results from the Kiseljak copper-gold diorite porphyry, part of the Tulare Project located within the Tertiary magmatic arc of the Western Tethyan in Southern Serbia.
1. HIGHLIGHTS
-- Framework diamond drilling (nominal 80 meter by 80 meter grid spacing)
on the Kiseljak copper-gold porphyry target area commenced during Q2,
2011 and continues to confirm moderate to strong porphyry-style
mineralization within and adjacent to the area of historic (Serbian
State) exploration.
-- Drilling of the Kiseljak target area returned the following moderate to
strong, near-surface, copper-gold intercepts (intercepts calculated
using a $15 value per tonne cut-off grade):
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Interval AuEq CuEq
Hole ID Zone From (m) To (m) (m) Au (g/t) Cu (%) (g/t) (%)
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KIDD006 South 6.3 135.6 129.3 0.39 0.24 0.85 0.42
KIDD007 North 115.0 257.0 142 0.42 0.40 1.22 0.61
KIDD007 268.0 331.0 63 0.56 0.37 1.31 0.65
KIDD007 345.0 612.7 267.7 0.40 0.42 1.24 0.62
KIDD008 South 1.0 74.4 73.4 0.38 0.38 1.14 0.57
KIDD009 South 0.4 159.0 158.6 0.39 0.26 0.84 0.42
KIDD010 North 209.0 613.4 404.4 0.29 0.33 0.95 0.47
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-$15 cut-off ($1,200/oz. Au, $3.50/lb. Cu), 5m min. composite length, 5m
max. internal dilution.
o AuEq = ((Au g/t(i)38.58) (Cu%(i)77.16))/38.58
o 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 1m sampling
basis and weigh approx.3kg.
-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.
-- Exploration trenching on the Tulare Project (Yellow Creek Target Area),
located approximately 1,000 meters west of the Kiseljak main zone
returned the following gold-copper intercept from porphyry-style
stockwork mineralization within diorite porphyry, which may represent an
additional and separate porphyry intrusive center (intercept calculated
using a $15 value per tonne cut-off grade). It should be noted that
within oxidised surface material copper has generally been
leached/remobilized:
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Interval AuEq
Trench ID From (m) To (m) (m) Au (g/t) Cu (%) (g/t) CuEq (%)
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KICH078 4 18 14 0.39 0.09 0.56 0.28
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-$15 cut-off ($1,200/oz. Au, $3.50/lb. Cu), 5m min. composite length, 5m
max. internal dilution.
o AuEq = ((Au g/t(i)38.58) (Cu%(i)77.16))/38.58
o CuEq = ((Cu%(i)77.16) (Au g/t (i)38.58))/77.16
-Trench/channel samples are generally taken on a 2m basis and weigh
approx.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
-- The Kiseljak porphyry target area has been defined over an approximate
area of 800 meters by 300 meters and further framework diamond drilling
will continue over this area on a nominal 80 meter by 80 meter grid
spacing.
-- Dunav currently has three diamond drill rigs operating on the Kiseljak
copper-gold porphyry target area.
2. GEOLOGY AND MINERALIZATION STYLE
-- The Kiseljak copper-gold porphyry is a typical calc-alkaline copper-gold
porphyry deposit, forming a north plunging (approx.70 degrees ) pipe
intruded into amphibolite and biotite schist country rock and andesitic
volcanics/volcaniclastics.
-- The mineralized porphyry system is associated with a series of
hornblende-biotite-plagioclase-phyric porphyry dykes. These have been
divided into four suites based on texture and association with Cu-Au
grade and alteration.
-- Mineralization is stockwork-related and disseminated in nature and
typical of this style of porphyry. Mineralization within the potassic
zone primarily comprises chalcopyrite veinlets with subordinate bornite
(0.1 to 10 mm thick) and disseminated chalcopyrite and bornite.
-- Variable amounts of digenite, chalcocite, covellite, molybdenite (not in
economic quantities) and pyrite occur together with rare galena and
sphalerite. Magnetite occurs both as disseminations and in quartz
veinlets.
-- Gold mineralization occurs as native gold associated with gangue
minerals. It also occurs as blebs within sulfides, particularly in
bornite and chalcopyrite. Gold correlates strongly with copper.
-- The Kiseljak porphyry measures some 800 meters by 300 meters, where it
is exposed at surface, and has been traced to a vertical depth of 450
meters to date. Both the porphyry and the surrounding schist have been
intruded by a series of intra-mineral to late porphyry phases, which are
generally poorly mineralized.
-- Figure 1 shows the location of the Kiseljak copper-gold porphyry main
zone, which for operational purposes, has been further subdivided into
the Kiseljak North and Kiseljak South zones.
3. DRILLING & TRENCHING AT TULARE
-- Kiseljak: Dunav has to date drilled three diamond drill holes (KIDD006
(re-drill of KIDD005), KIDD008 and KIDD009) on the Kiseljak South target
area which was discovered by exploration trenching during 2010. All
holes have reported moderate to strong copper-gold mineralization from
surface to down hole depths of up to approximately 150 meters.
Geological interpretation suggests that these drill holes have
effectively drilled 'through' the north plunging (approx.70 degrees )
porphyry system into lower grade mineralization.
-- Additionally, Dunav has completed two diamond drill holes (KIDD007 and
KIDD010) on the Kiseljak North target area which represents the area
where the majority of the historic exploration was completed and which
have further confirmed the potential for moderate to strong copper-gold
mineralization over significant down hole widths.
-- See Table 1 for a summary of all Kiseljak intersections to date,
including the results of diamond drill holes KIDD005 to KIDD010 which
are the subject of this release.
-- See Figures 1, 2 & 3 for the location of all diamond drilling to date
together with representative cross-sections through the Kiseljak target
area.
-- Yellow Creek: Recent exploration trenching on the Yellow Creek target
area has discovered a limited area of outcrop with porphyry-style
sheeted veins. Dunav believes that the Yellow Creek target area, located
approximately 1,000 meters west from the Kiseljak target area may
potentially represent a separate porphyry copper-gold intrusive center.
-- The Yellow Creek target area is overlain by strongly altered
(predominantly kaolinite (after sericite) and pyrite) andesitic volcanic
and volcaniclastics rocks which may represent the 'pyrite halo' or
lithocap zone to the underlying porphyry intrusive.
-- See Table 2 for a summary of all trench intersections on the Tulare
project to date and Figure 4 for the location of the Yellow Creek target
area in relation to the Kiseljak main zone.
4. DISCUSSION
-- The Tulare project area lies within the Lece Volcanic Complex of
southern Serbia; the second largest magmatic complex in Serbia after the
Timok. The 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 drilled predominantly during
the 1980s, culminating in a historical resource estimate. In total, 32
vertical diamond drillholes, ranging from 109m to 450m depth, were
completed at Kiseljak 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, 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 and gravity recovery characteristics were exhibited
for both copper and gold, and a copper-gold concentrate with no
deleterious elements was produced. Preliminary grinding tests showed a
medium to soft mineralization type with a bond work index of
approximately 11kwhr/t.
-- Dunav has recently commenced a 13,000 meter diamond drilling program to
fully define the overall potential of the Kiseljak copper-gold porphyry
deposit and determine the geometry of the system. Results to date
indicate that the overall tenor of grade within the porphyry
mineralization is in line with or slightly above historic results.
-- Additionally, the Yellow Creek target area may represent a separate and
additional porphyry copper-gold intrusive center and supports Dunav's
belief that the Tulare project represents a potential porphyry cluster
of copper-gold mineralized centers; exploration drilling has been
planned for the Yellow Creek target area during 2011.
5. SAMPLING AND ANALYSIS
The majority of soil samples have been assayed at the ALS Chemex laboratory, Perth, Australia. More recent 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 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. A one metre sampling interval has been used where possible for the Tulare 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 2m 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 3kg/m, 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 National Instrument 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 $11.5 million in its treasury at August 31, 2011, which it plans to use for the exploration and development of its mineral projects in Serbia. Dunav's issued and outstanding share capital totals 99,557,029 common shares, of which approximately 47.5% 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, and the potential of the Tulare 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.
Figures 1,2,3 & 4 and Tables 1 and 2 are available at the following address: http://media3.marketwire.com/docs/dunav_figs.pdf
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this press release.
Contacts:
Dunav Resources Ltd.
James Crombie, President and Chief Executive Officer
1.450.640.0810
info@dunavresources.com
www.dunavresources.com