Lithic Completes Preliminary Economic Assessment of Crypto Zinc-Copper-Indium Project
05 August 2010 - 3:15PM
Marketwired
Lithic Resources Ltd. (TSX VENTURE: LTH) (the "Company") announces
that it has received the results of a Preliminary Economic
Assessment of its 100% owned Crypto project in western Utah from
its team of independent consulting engineers.
Summary
The study shows that approximately 55-60% of the tonnage at the
grade required to support the most likely development scenario of a
3,500 tonne per day underground mine has been outlined to date. The
deposit is open-ended and a US$3.6 million program of continued
drilling is recommended to locate additional higher grade
mineralization that could increase the overall grade of the
mineable resource and which might also be available for early mine
scheduling. Existing lower grade resources could be used to extend
mine life following payback of development capital.
Technical
Following a review of metallurgical testwork data, NSR (net
smelter return) values were assigned to each block in the resource
model first published in a November 19, 2009 release. Both
Indicated and Inferred resources were considered in the study. A
conceptual mine plan was developed for underground extraction of
the sulphide resource only, the oxide resource representing a
potential future open pit opportunity. Access to the underground
would be via a double ramp system. Longitudinal retreat stoping
with uncemented rock fill was chosen as the primary mining method.
Allowing for full mine dilution, extraction and recovery factors, a
total of 12.1 million tonnes with an average grade of 5.18% zinc,
0.38% copper and 35 g/t indium was scheduled over a period of 11
years for a mill throughput of 3,500 tonnes per day. A flotation
process plant built on site would produce separate zinc-indium and
copper-gold-silver concentrates.
Cost and production parameters for this development scenario are
summarized in the following table:
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Pre-production capital US$ millions 186.9
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Sustaining capital " 118.9
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Total capital " 305.8
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Mining/processing rate tonnes per day 3,500
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Mine life years 11
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Total operating cost US$/tonne 64.28
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Average annual production
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zinc lb 89,285,000
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copper lb 7,138,000
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indium kg 21,000
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gold oz 7,000
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silver oz 1,009,000
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In order to maximize economies of scale and achieve a maximum
possible mining/processing rate of 3,500 tonnes per day, the model
considered all sulphide resources and used a zinc price of $1.10
per pound to outline enough tonnage above a cutoff grade of 4% zinc
equivalent to support a minimum ten year mine life. Other metal
prices used in the study were copper at $2/lb, indium at $500/kg,
gold at $850/oz and silver at $12/oz. Assuming 100% equity funding,
the pre-tax internal rate of return (IRR) on the project is
2.5%.
Analysis of the cash flow model indicates that the economics are
most sensitive to zinc price and zinc grade. Increasing the cutoff
grade to a sufficient level resulted in a reduction of tonnage
available for mine scheduling to approximately 55-60% of the total
required. It was recommended that the next phase of work at Crypto
should focus on expansion of higher grade resources through
approximately 10,000 metres of core drilling with a budget of
US$3.6 million. A technical report will be filed on SEDAR within 45
days.
Outlook
The President and CEO of the Company, Chris Staargaard,
commented, "The engineering team has shown that the most likely
development scenario at Crypto would be a completely conventional
underground mine and mill complex producing clean and high value
concentrates. However, they have also shown that we still have some
work to do. While a significant proportion of the minimum grade and
tonnage required for an economic situation has already been
defined, we need to carry on drilling to identify additional,
relatively higher grade mineralization. Fortunately, the geological
model shows that there is good potential to expand existing
resources to the east, west and south, and very good potential for
the discovery of new zones in similar stratigraphy beyond these
extensions. With all necessary permits in place along with water
rights, we look forward to advancing the Crypto project as soon as
market conditions permit. We continue to have confidence in this
high-quality, advanced stage asset with infrastructure in a
politically stable, mining-friendly jurisdiction, a mineral deposit
that to the best of our knowledge represents the most significant
potential indium resource in the continental USA."
The technical information in this news release has been prepared
in accordance with Canadian regulatory requirements as set out in
NI 43-101 and was reviewed by Ken Major, P.Eng. (metallurgy and
process engineering), John Nilsson, P.Eng. (resource/economic
modelling) and Keith Durston, P.Eng. (mine design), independent
Qualified Persons as defined in NI 43-101.
A Preliminary Economic Assessment is a conceptual analysis of a
mine development scenario and is based on a number of economic and
technical assumptions. It includes Inferred Resources which are
considered too geologically speculative to be classified as Mineral
Reserves. Investors are cautioned that mineral resources that are
not mineral reserves do not have demonstrated economic viability.
US investors are further cautioned that existing SEC terminology
and rules regarding mineral resources do not conform with Canadian
and other internationally accepted standards.
LITHIC RESOURCES LTD.
C.F. Staargaard, President and CEO
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 release.
Contacts: Lithic Resources Ltd. Chris Staargaard President/CEO
(604) 687-7211 (604) 648-9578 (FAX) info@lithicresources.com
www.lithicresources.com
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