Mr. Patrick Anderson reports
DALRADIAN ANNOUNCES UPDATED MINERAL RESOURCE ESTIMATE AT CURRAGHINALT RESULTING IN A 114% INCREASE IN MEASURED AND INDICATED GOLD OUNCES
Dalradian Resources Inc. has released an updated mineral resource estimate for its 100-per-cent-owned Curraghinalt gold deposit, located in Northern Ireland.
Highlights include:
- 114-per-cent increase in measured and indicated (M&I) resource to one million
contained gold ounces at a five-gram-per-tonne-gold cut-off and an increase of 12 per cent in
inferred resource to 2.49 million contained gold ounces;
- The average horizontal width of this resource is 2.57 metres, while the
minimum horizontal stope width contemplated in the 2012 preliminary economic assessment mine plan
was 1.8 metres, which resulted in a head grade of 8.1 g/t gold.
Gold resources by category are summarized in the table.
CURRAGHINALT MINERAL RESOURCES
(As at Jan. 20, 2014)
Resource category Tonnes Grade Contained gold
(Cut-off grade of 5.0 g/t) (M) (g/t Au) (ounces)
Measured 0.02 20.15 15,100
Indicated 2.98 10.34 989,000
Measured plus indicated 3.00 10.41 1,004,100
Inferred 8.01 9.67 2,487,700
1. Resource estimate prepared by T. Maunula & Associates Consulting Inc.
with an effective date of Jan. 20, 2014.
2. Mineral resources which are not mineral reserves do not have
demonstrated economic viability. The estimate of mineral resources may
be materially affected by environmental, permitting, legal, marketing, or
other relevant issues. The mineral resources in this news release were
estimated using the Canadian Institute of Mining, Metallurgy and Petroleum
standards on mineral resources and reserves, definitions, and guidelines
prepared by the CIM standing committee on reserve definitions and adopted
by the CIM council.
3. Contained metal figures and totals may differ due to rounding of
figures.
4. The resource is reported at a cut-off grade of five g/t gold,
consistent with the 2012 PEA and the 2011 resource.
5. Block grades were interpolated using inverse distance weighting with a
power of three (IDW3) in Minesight software.
"Our infill drill program has more than doubled our M&I ounces at Curraghinalt," commented chief executive officer Patrick Anderson. "We used wider resource envelopes which will likely require less dilution in an eventual mine plan than was required for the previous narrower resource envelopes. This new modelling approach simply incorporates more dilution upfront. We have also developed a superior geological model that will allow us to better target additional ounces with a modest amount of drilling. Our deposit remains open in all directions."
The Curraghinalt gold deposit is a lode gold system consisting of a series of steeply dipping, structurally controlled, high-grade gold-bearing quartz-carbonate veins. The deposit remains open in all directions. The mineral resource estimate incorporates 80,976 metres from 406 drill holes, as well as underground channel samples from existing drifts along the T17, Sheep Dip and No. 1 vein zones. Incorporation of the approximately 29,000 metres of drilling completed since the 2011 mineral resource estimate has increased the geological confidence, with contained indicated gold resources increasing from 460,000 ounces to 989,000 ounces. In addition, the contained inferred gold resources increased from 2.2 million ounces to 2.5 million ounces. The mineral resource estimate does not include C veins, except where C veins were identified in close proximity to main veins. Future modelling efforts are planned to address the C veins.
This mineral resource model is based on a complete reinterpretation of the vein zones. In total 12 vein zones were modelled and assay data were composited to one m downhole length. Mineralization envelopes were defined for each vein zone using a minimum of two one m composites. Over all, 1.9 per cent of the composites were capped; capping methodology varied by vein zone, and was based on grade distribution and statistical analysis. Globally the average horizontal thickness of the interpreted mineralization envelopes is 2.57 m.
Block model gold grades were estimated in two passes and search ellipse orientation varied by vein zone. The first pass used a minimum of one composite and a maximum of eight composites with a maximum of two composites per drill hole. The search ellipse dimensions were 200 m by 100 m by 200 m. The second pass used a minimum of three composites and a maximum of eight composites, with a maximum of two composites per drill hole. The search ellipse dimensions were 100 m by 50 m by 100 m.
Appropriate validations were undertaken to ensure that the block model adequately represents the informing composite data. A bulk density of 2.85 tonnes/cubic m was used for all vein zones.
Resources were classified based on using a minimum of two drill holes and three composites for grade estimation. Categorization of mineral resources was done based on the following criteria:
- Measured mineral resources include blocks within six metres from
underground development, the nominal spacing (distance to nearest
composite) was 10 m.
- Indicated resources were based on a maximum distance to the nearest
composite of 30 m with a nominal spacing of 20 m.
- Inferred resources were based on a maximum distance of 125 m to the
nearest composite with a nominal spacing of 72 m.
The company intends to file a National Instrument 43-101-compliant technical report in respect of the updated mineral resource estimate on SEDAR and on the company's website within 45 days of this news release.
Tim Maunula, PGeo, president and principal geologist, T. Maunula & Associates Consulting, is the independent qualified person (QP) responsible for the mineral resource for the Curraghinalt gold deposit. During his over-30-year career in exploration, operations and consulting, he has completed numerous resource estimates and served as the chief geostatistician for an international consulting firm. He has experience in the geological evaluation of gold, base metals, diamonds, uranium, rare earth elements and iron ore in Canada and internationally in over 20 countries. Within the gold and silver industry, Mr. Maunula has completed projects for a wide range of clients, including Barrick Gold Corp., Goldcorp Inc., Kinross Gold Corp., Eldorado Gold Corp., Teck Resources Ltd., Hochschild Mining PLC, St Andrew Goldfields Ltd., Queenston Mining Inc. and Brigus Gold Corp. His role is typically to perform resource estimates or audit existing resources, as well as geological modelling and geostatistical consulting.
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