completato lo studio per lo sfruttamento della miniera di las cristinas che pare estremamente promettente
TORONTO, Sept. 10 /CNW/ -- Crystallex International
Corporation (Amex: KRY; Toronto) today announced that the economic viability
of its Las Cristinas gold project located in Bolivar State in south-eastern
Venezuela has been confirmed by a full Feasibility Study completed by
SNC-Lavalin Engineers and Constructors, (SNCL). A copy of the Executive
Summary of the Feasibility Study will be available on the Company's website
at
www.crystallex.com by early next week.
"We are delighted with the results of the Feasibility Study which clearly
distinguish Las Cristinas as a premier gold deposit that can be economically
developed and operated by conventional mining and gold processing technology.
We look forward to quickly finalizing development plans with the CVG. The
reserves delineated by the Feasibility Study transform Crystallex into the
fifth largest North American-based gold company in terms of reserves,"
remarked Ken Thomas, Chief Operating Officer of Crystallex.
Feasibility Study Operating Highlights
Measured and Indicated Resources(A)
(0.5g/t cut-off) 439 million tonnes grading 1.09 g/t;
15.3 million ounces of contained gold
Mineable Reserves(A,B)
(Proven and Probable) 246 million tonnes grading 1.29 g/t;
10.2 million ounces of contained gold
Gold Price US$325/oz.
Metallurgical Recovery 89%
Daily Mill Throughput 20,000 tonnes
Annual Mill Throughput 7,300,000 tonnes
Overall Strip Ratio 1.34
Mine Life 34 years
Average Annual Gold Production -
First Five Years 311,000 ounces
Average Annual Gold Production -
Life of Mine 266,000 ounces
Development Capital US$243 million
VAT on Development Capital(C) US$39 million
Operating Costs Per Tonne of Ore US$6.70
Total Cash Costs Per Ounce(D) -
First Five Years US$144
Total Cash Costs Per Ounce(D) -
Life of Mine US$196
(A) Mineral reserve and mineral resource estimates in the Feasibility
Study have been estimated in accordance with the standards of the
Canadian Institute of Mining and Metallurgy as adopted by the
Canadian Securities Regulators in National Instrument 43-101.
(B) Mineral reserves, which were calculated using a gold price of
US$325/oz., are included in the mineral resources.
(C) VAT is charged on goods and services during the construction period;
however, is fully recoverable from gold sales revenues.
(D) Includes royalties.
Las Cristinas Economic Highlights
The Feasibility Study financial results, calculated at a gold price of
US$325 per ounce, demonstrate that Las Cristinas can be economically developed
as a large, open pit mining operation utilizing a conventional gravity and
carbon-in-leach (CIL) gold processing circuit. SNC-Lavalin Capital's
financial model was based upon the assumption of an all-equity financed
project.
Based upon current proven and probable reserves of 10.2 million ounces and
a gold price of US$325 per ounce, Las Cristinas will generate pre-tax
cumulative free cashflow of US$742 million. At US$375 per ounce, pre-tax
cumulative cashflow climbs to US$1.2 billion.
The tables below reflect the before and after tax financial returns
generated at a gold price of US$325 per ounce and also at gold prices more
reflective of current market conditions.
Before Tax Gold Price (US$/ounce)
Feasibility Sensitivities
US$ millions $325 $350 $375
Cumulative Free Cashflow(A) $742 $942 $1,156
NPV @ 5% (unleveraged) $239 $327 $421
IRR (unleveraged) 13.8% 16.6% 19.4%
Payback 4.7 years 4.1 years 3.7 years
(A) Cumulative Free Cashflow is defined as cashflow net of development
and sustaining capital, operating costs and royalties, including a 3%
exploitation tax. Royalties include the 3% Exploitation Tax on gold
sales payable to the Venezuelan Ministry of Mines and the royalty on
gold sales payable to the CVG (1% if gold is <= $280/oz; 1.5% if gold
is >$280/oz and < $350/oz; 2% if gold is >=$350/oz and <$400/oz and
3% if gold is >=$400/oz).
After Tax Gold Price (US$/ounce)
Feasibility Sensitivities
US$ millions $325 $350 $375
Cumulative Free Cashflow(A) $516 $648 $789
NPV @ 5% (unleveraged) $140 $198 $260
IRR (unleveraged) 10.5% 12.5% 14.6%
Payback 6.9 years 5.5 years 4.7 years
(A) Cumulative Free Cashflow is defined as cashflow net of development
and sustaining capital, operating costs and royalties, including a 3%
exploitation tax, and an estimated 34% Venezuelan income tax.
Overview
The overall Feasibility Study for Las Cristinas was prepared by SNCL. The
Qualified Person in charge of the overall execution of the feasibility study
is John B. Scott, P. Eng. The Study includes work performed by other
independent consultants under the coordination of SNCL. The geology, reserves
and mining sections of the Study were prepared by Mine Development Associates
of Reno Nevada. Metallurgical pilot plant testwork was conducted by SGS
Lakefield Research in Ontario. Metallurgical process work was undertaken by
J.R. Goode & Associates, Professor Andre Laplante of McGill University and
SNCL. A hydrology study was undertaken by SRK Consulting in Chile. SNCL and
Proconsult of Venezuela carried out environmental work. Financial analysis
was performed by SNC-Lavalin Capital Inc.
Las Cristinas is planned as a conventional truck and shovel open pit mine.
Processing consists of crushing, semi-autogenous primary grinding (SAG) and
secondary ball mill grinding. A gravity circuit is incorporated to recover
free gold. Gold extraction is achieved in a conventional carbon-in-leach
(CIL) circuit. Gold is removed from the loaded carbon by pressure stripping,
electrowinning and smelting to produce a gold dore. Mill throughput is
planned at 20,000 tonnes per day; however, the mill has been designed to
accommodate an expansion to 40,000 tonnes per day.
Resource/Reserve Methodology and Verification
Mine Development Associates (MDA) completed a resource model that was
based on an electronic database of drill, topographic, geologic and
engineering data that Crystallex acquired from the Corporacion Venezolana de
Guayana, (CVG) in September 2002. Data from 1,174 drill holes and 108
trenches were included in the Las Cristinas database. Over 160,000 meters of
drilling have been completed on the property (including trenches). In
addition, MDA and Crystallex undertook a drill and sample assay program to
verify the presence and tenor of the mineralization reported in the acquired
database. The verification program included drilling 2,188 meters in twelve
diamond drill holes and analyzing 275 quality assurance/quality control
samples. MDA found that the verification drill results and check samples
corroborate the tenor of gold mineralization previously reported. For
additional confirmation, Crystallex and MDA re-assayed 262 pre-existing pulps,
200 pre-existing coarse rejects and 342 pre-existing quarter core samples.
Mean grades are similar for both datasets.
Reserves
Mineral reserve estimates were developed by MDA from its resource model
using Medsystem-MineSight computer software. Two separate pits were designed:
the larger Conductora, which contains the bulk of the reserves, and the
Mesones. The Conductora pit was divided into five phases or pushbacks to
improve project economics and delay waste mining as much as possible. Pit
designs were based on a US$325 per ounce gold price and cut-off grades ranging
from 0.46 g/t to 0.69 g/t, depending upon the material type.
Tonnes Average Contained
Pit Reserve Category (000) Grade (g/t) Ounces (x 000)
Conductora Proven 36,620 1.38 1,625
Probable 187,117 1.27 7,669
Mesones Probable 21,922 1.24 871
Total Proven 36,620 1.38 1,625
Probable 209,039 1.27 8,540
Total Proven & Probable 245,659 1.29 10,165
The deposit is open ended at depth. Additional drilling may result in
upgrading some or all of the 208 million tonnes of Inferred Resources to
Measured or Indicated Resources, which could add to reserves.
Mining
The saprolite ore will likely be mined by a contractor using a fleet of
all-wheel drive trucks, while the bedrock ore will be mined by Crystallex
using a fleet of standard 136 tonne haul trucks and 21 cubic metre capacity
excavators. Different equipment is used in the saprolite and bedrock ores due
to the different material characteristics. Mining will consist of drilling
and blasting of the bedrock ore (the saprolite ore does not require blasting)
and hauling by truck to stockpiles or a crusher located at the processing
plant.
The mine production schedule is based upon providing the plant with 20,000
tonnes of ore per day, or 7.3 million ore tonnes per year. This results in a
mine life of 34 years. The average strip ratio over the life of the mine is
1.34:1.
Stockpiling and blending of the ore types will be utilized to optimize
plant throughput and gold recovery.
Metallurgy
The Las Cristinas deposit comprises a sequence of oxidized saprolite
(SAPO), sulphide saprolite (SAPS), carbonate leached bedrock (CLB) and
carbonate stable bedrock (CSB). Gold occurs in all ore types at similar
grades. Copper is absent from the SAPO, enriched in the SAPS and present at
low levels in the CLB and CSB.
A review of available metallurgical data by SNCL and J.R. Goode and
Associates and various trade-off studies indicated that direct leaching of the
ore and on-site production of bullion would provide optimum gold recovery
rates and project economics. To confirm the direct leach process and to
determine the gold recovery and reagent requirements and generate plant design
data, a comprehensive bench test and pilot plant operation were conducted at
SGS Lakefield Research during the months of April through August 2003. The
tests were conducted on several samples of all four ore types. Samples of
Conductora ore were also sent to McGill University for gravity recovery
testwork. Outokumpu also conducted pilot plant settling tests on several
samples. Gold recoveries have been estimated by SGS Lakefield Research to be
98.0 % for SAPO, 86.8% for SAPS, 87.6% for CLB and 87.6 % for CSB.
The pilot plant was operated for three weeks in which blended, batch
ground/gravity concentrated ore was subject to carbon-in-leach processing.
The gravity and pilot plant tests resulted in an overall average recovery
(gravity+leaching) of 89% for the planned SAPO/SAPS/CLB/CSB ore blend.
Processing
The processing plant consists of crushing, semi-autogenous primary
grinding, followed by secondary grinding in a ball mill.
A gravity recovery circuit is included in the grinding circuit for
recovery of free coarse gold prior to regrinding in the ball mill.
Gold extraction is achieved in a conventional carbon-in-leach circuit.
Gold is removed from the loaded carbon by pressure stripping, followed by
electrowinning of the gold metal from the pregnant solution and smelting of a
dore bar.
Infrastructure and Services
A long history of mining and industrial projects in Bolivar State makes
the region very suitable for the development of a large gold mining project.
The Las Cristinas site is serviced by paved highway from the Venezuelan port
of Puerto Ordaz, a major industrial city located on the Orinoco River, some
360 kilometres from Las Cristinas. Las Cristinas is located 6 kilometres west
of the village of Las Claritas, which is on the main highway from Puerto
Ordaz.
An existing 400 kV power line parallels the main highway from Puerto
Ordaz. A new substation was constructed six kilometres from Las Cristinas in
2001 to service the area. The substation has two 150 MVA power transformers
and provision has been made to supply Las Cristinas via a new six kilometre
230 kV overhead power line. The site power demand is estimated at 30 MW which
can be adequately supplied by the substation. Adequate power is available to
support a Project expansion to 40,000 tonnes per day.
Tailings Management Facilities (TMF)
The tailings dam is a conventional centre line structure with a centre
wall drain and buttressed by waste rock. The dam wall is rolled saprolite and
the dam floor is impervious saprolite (clay) up to 20 to 40 meters thick. The
area has an earthquake rating of zero (the lowest rating). The TMF was
designed to national and internationally accepted practise and risk ratings in
respect of earthquake and flood events.
Environmental Management
SNCL has conducted a preliminary environmental impact analysis and
assessment of potential environmental impacts associated with the construction
and operation of the Las Cristinas project. A Preliminary Environmental
Impact Assessment, (EIA) is scheduled for completion by SNCL shortly. A Final
EIA, Site Closure and Rehabilitation Plan together with an Environmental
Management Plan that meets Venezuelan and World Bank standards will be
completed as detailed engineering progresses.
As a result of the Project design parameters chosen and the nature of the
orebody, the Preliminary Environmental Impact Analysis has concluded that:
-- Risk of significant environmental contamination from effluent
discharges is low.
-- Risk of Tailings Management Facility failure or environmental
contamination is low.
-- Permitting is expected to be straightforward based on ongoing
discussions and informational review with the Venezuelan Ministry of
Environment and Natural Resources. All work will be completed to
Venezuelan and World Bank standards.
-- Risk of contamination following closure is low.
Further work undertaken as the Project advances to the next stage will aim
to confirm these conclusions.
Capital Cost Estimates
Capital cost estimates are based upon new equipment and are expressed in
US dollars.
Item Cost Estimate (US$,000)
Mine 27,258
Process Plant 80,196
Tailings Management Facility 24,490
Infrastructure 27,728
Sub-Total Direct Costs 160,672
Owner's Cost 10,000
Indirect Costs (including contingency) 72,095
Total Costs 242,767
VAT(A) 38,843
Total Initial Capital Requirement $281,610
(A) VAT of 16.5% has been applied to the total capital costs. This is
fully recovered over the first two and one half years from gold sales
revenues.
Operating Cost Estimates (at US$325 gold)
Total cash costs for the first five years of production are estimated at
US$130 per ounce before royalties and US$144 per ounce including royalties.
Over the life of mine, average total cash costs are estimated at US$182 per
ounce of gold ($6.70/tonne of ore) before royalties and US$196 per ounce
including royalties. Unit operating costs by area are tabled below:
Item Op. Cost/Tonne Ore Op. Cost/Ounce Gold (1)
Mining $2.94 $80
Processing $3.38 $92
G&A $0.38 $10
Total $6.70 $182
(A) Excludes royalties.
Financial Analysis
SNC-Lavalin Capital prepared a financial model for the Las Cristinas
Project. The model was run in US dollars with no allowance for inflation.
The model includes all capital costs, operating costs, royalties and a 34%
income tax. Depreciation was conservatively assumed for a 20 year life on a
straight line basis. An existing investment tax credit of 10% of the
development capital cost is utilized to offset income taxes during the first
two years of production. For simplicity, the model assumed that the Project
is financed entirely with equity; however, the application of project debt
will improve the already robust internal rate of return. The Base Case model
used a gold price of $325 per ounce. Key results are as follows:
Before Tax After Tax
Gold Price $325 per ounce $325 per ounce
Cumulative Free Cashflow $742 million $516 million
NPV @ 5% $239 million $140 million
IRR 13.8% 10.5%
Payback 4.7 years 6.9 years
A sensitivity analysis was performed which considered the impact to the
financial results from changes to the gold price, capital costs and operating
costs. The analysis indicated that the Las Cristinas financial results are
most sensitive to changes in the gold price. On an pre-tax basis, a 10%
increase in the gold price resulted in a 29% increase in the IRR to 17.8%,
while similar decreases to the capital or operating costs yielded IRR
increases of only 15% in both cases.
Sensitivity results, illustrated independently for changes to the gold
price, operating costs and capital costs, on a pre-tax basis are presented
below:
Gold Price IRR Operating Costs IRR Capital Costs IRR
US$/oz % % of Base % % of Base %
$260 4.0% 80% 17.9% 80% 18.5%
$293 9.5% 90% 15.9% 90% 15.9%
$325 13.8% 100% 13.8% 100% 13.8%
$355 17.8% 110% 11.5% 110% 12.1%
$390 21.5% 120% 8.9% 120% 10.7%
The Feasibility Study has been provided to the CVG in accordance with the
Mining Operation Contract signed in September 2002.
Next Steps -- Project Implementation
The next phase of advancing Las Cristinas, which is estimated to extend
through the first quarter of 2004, will focus on awarding an Engineering
Procurement and Construction Management mandate, initiating Detailed
Engineering work, completing the Preliminary and Final EIS reports, and
securing the Land Use Permit and the Permit to Impact the Environment. The
Company will also continue to advance the social programs committed to under
the terms of Crystallex's Mining Operation Contract. These include providing
new water treatment facilities, sewerage systems, houses and road improvements
for the local communities. In addition, the Company will continue to work
with its financial advisors to determine the optimum financing structure and
sources of debt financing for Las Cristinas.
About Crystallex: Crystallex International Corporation is a Canadian
based gold producer with operations and exploration properties in Venezuela
and Uruguay. Crystallex shares are traded on the TSX and AMEX Exchanges.
Crystallex is focused on strategic growth in South America. The Company's
principle asset is the Las Cristinas property in Venezuela. The Mining
Agreement gives Crystallex 100 percent control of the reserves and resources
of this project. Crystallex is currently working on the final feasibility
study to support its development plans for Las Cristinas.
Note: This news release may contain certain "forward-looking statements"
within the meaning of the United States Securities Exchange Act of 1934, as
amended. All statements, other than statements of historical fact, included
in this release, including, without limitation, statements regarding potential
mineralization and reserves, exploration results, and future plans and
objectives of Crystallex, are forward-looking statements that involve various
risks and uncertainties. There can be no assurance that such statements will
prove to be accurate, and actual results and future events could differ
materially from those anticipated in such statements. Important factors that
could cause actual results to differ materially from the Company's
expectations are disclosed under the heading "Risk Factors" and elsewhere in
documents filed from time to time with the Toronto Stock Exchange, the United
States Securities and Exchange Commission and other regulatory authorities.
Please Note: The estimates described in this study and herein qualifies as
reserves in accordance with Canadian National Instrument 43-101. However,
they do not necessarily qualify as reserves for United States reporting
purposes. Therefore, readers should not assume that the information provided
in the study and in this release is acceptable for United States reporting
purposes. Furthermore, readers should note that measured and indicated
resources presented herein would not be acceptable for United States reporting
purposes.
The Toronto Stock Exchange has not reviewed this release and does not
accept responsibility for the adequacy or accuracy of this new release.
/Company News On-Call:
http://www.prnewswire.com/comp/114620.html /
/Web site:
http://www.crystallex.com /
VIEW ADDITIONAL COMPANY-SPECIFIC INFORMATION:
http://www.newswire.ca/cgi-bin/inquiry.cgi?OKEY=53688
/For further information: Investor Relations, A. Richard Marshall, VP of
Crystallex International Corporation, +1-800-738-1577, or email,
mail(at)crystallex.com /
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