VANCOUVER, British Columbia,
December 10, 2018 /PRNewswire/ --
(All amounts in US$ unless otherwise
specified)
Capstone Mining Corp. ("Capstone") (TSX:CS) releases positive
results of an updated Technical Report for its Cozamin Mine in
Zacatecas, Mexico.
Highlights
- Proven and Probable Mineral Reserves increased by 89%, over the
Reserves as at December 31, 2017, to
6.2 million tonnes grading 1.60% copper.
- Results of the Materials Handing Study shows an approximate 30%
increase in expected throughput to 3,780 tonnes per day ("tpd") by
the end of 2020, with an estimated investment of less than
$5 million. The anticipated result is
an increase in annual production to between 40 to 45 million pounds
of copper.
- Inferred Mineral Resources have increased to 17 million tonnes
at a copper grade of 1.11%; including 9.5 million tonnes at a
copper grade of 1.61% in the Mala Noche Footwall Zone ("MNFWZ").
This area of the MNFWZ is a shallower and thicker zone of
mineralization than the current Indicated Mineral Resources, and
the target for a multi-year infill drill program with the goal of
converting more resources to reserves.
"The Cozamin mine continues to be a valuable asset for Capstone
and formed the foundation upon which we built our company," said
Darren Pylot, President and CEO of
Capstone. "Since commencing production at 1,000 tpd in 2006,
Cozamin has demonstrated a remarkable ability to continue to
discover and define new reserves. Today, more than 12 years
and approximately 12 million milled tonnes later, we announce the
next step in Cozamin's evolution. The combination of the new
Reserves as well as the significantly increased Inferred Resources
give us the confidence to make additional investment to increase
Cozamin's production profile. We look forward to continued
exploration success and the further delineation of reserves at
Cozamin as the mine continues to operate well into the future."
Mineral Reserve Estimate
Cozamin Mineral Reserve Estimate as at October 24, 2018 at a US$50 Net Smelter Return
Cut-off
Category Copper Silver Zinc Lead
Tonnes Cu Ag Zn Pb Metal Metal Metal Metal
(kt) (%) (g/t) (%) (%) (kt) Troy (koz) (kt) (kt)
Proven - - - - - - - - -
Probable 6,195 1.60 42.89 0.71 0.14 99 8,543 44 8
Proven + 6,195 1.60 42.89 0.71 0.14 99 8,543 44 8
Probable
1. Tucker Jensen, P.Eng., Senior Mining Engineer at Capstone Mining Corp., is the
Qualified Person for this Cozamin Mineral Reserve update. Disclosure of the Cozamin
Mine Mineral Reserves as of October 24, 2018 was completed using fully diluted mineable
stope shapes generated by the Maptek Vulcan Mine Stope Optimizer software and estimated
using the 2016 MNV resource block model created by J. Vincent, P.Geo., formerly of
Capstone Mining Corp and the 2018 MNFWZ resource block model created by Garth Kirkham,
P.Geo., FGC.
2. Mineral Reserves are reported at a US$50/t net smelter return ("NSR") cut-off using
the NSR275 formula: ($50.707*%Cu + 0.366*Ag ppm + 7.276*Zn%)*(1-NSRRoyalty%) based on
metal price assumptions (in US$) of Cu = $2.75/lb, Ag = $16.00/oz, Zn = $1.10/lb and
metal recoveries of 96.5% Cu, 81% Ag, 44% Zn. Note that zero value was attributed to
Pb due to low concentrations. Tonnage and grade estimates include dilution and
recovery allowances. The NSR royalty rate applied varies between 1% and 3% depending
on the mining concession. All metals are reported as contained. Figures may not sum
exactly due to rounding.
Processing Rates
Cozamin's mill throughput is currently constrained by the mine's
ability to deliver ore to surface. The Materials Handling Study
identified congestion on the main haulage ramp as the mine
production bottleneck and compared several alternative solutions to
sustainably raise production to match the nameplate mill capacity.
For a total investment of less than $5
million, Cozamin will be able to transform its haulage
network from a two-way single ramp to a one-way ramp loop by
connecting an existing main ramp to a planned ramp with a short (~1
km) drift. The future one-way haulage loop (including the
aforementioned planned ramp) is expected to be completed by the end
of 2020 and raise production by approximately 30%, when compared to
current mine production rates.
Mineral Resource Estimate
Cozamin Mineral Resource Estimate as at October 24, 2018 at a US$50 Net Smelter Return
Cut-off
Category Copper Silver Zinc Lead
Tonnes NSR Cu Ag Zn Pb Metal Metal Metal Metal
(kt) (US$) (%) (g/t) (%) (%) (kt) Troy (koz)(kt) (kt)
Measured (M) 407 120 1.24 53 1.23 0.40 5 694 5 2
Indicated (I) 16,881 133 1.50 45 1.25 0.28 254 24,162 210 46
Total M + I 17,288 132 1.50 45 1.25 0.28 259 24,855 215 48
Inferred 16,951 111 1.11 44 1.65 0.29 188 23,939 279 49
1. Garth Kirkham, P.Geo., FGC, is the independent Qualified Person responsible for the
disclosure of Cozamin Mineral Resources.
Mineral Resources are reported at a US$50/t NSR cut-off using the NSR350 formula:
Cu*65.024 + Ag*0.438 + Zn*10.755 + Pb*6.981 based on metal price assumptions (in US$)
of Cu = $3.50/lb, Ag= $18.00/oz, Zn = $1.20/lb, Pb = $1.00/lb and metal recoveries of
95% Cu, 78% Ag, 58% Zn, 40% Pb. Cozamin Mineral Resources include copper zones (MNFWZ
and San Roberto-Cu) and zinc zones(San Rafael-Zn and San Roberto-Zn). All contained
metals are reported at 100%. Totals may not sum exactly due to rounding.
2. The cut-off date for mining activities and drillhole sample results is October 24,
2018.
3. Mineral Resources are not Mineral Reserves and do not have demonstrated economic
viability.
4. Mineral Resources are reported inclusive of the Mineral Reserves.
Mineral Resource Estimate Methodology
The Mineral Resource estimate reported herein was prepared by
Garth Kirkham, P.Geo., FGC, of
Kirkham Geosystems Ltd. of Burnaby,
BC, Canada, an Independent
Qualified Person under Canadian Securities Administrators' National
Instrument 43-101 ("NI 43-101"). The Mineral Resources presented
herein have been estimated in conformity with generally accepted
CIM "Estimation of Mineral Resource and Mineral Reserves Best
Practices" guidelines and are reported in accordance with NI
43-101. The estimate was completed using MineSight™ software using
a three-dimensional block model (12 metre by 2 metre by 10 metre
block size with 4 metre by 0.5 metre by 2 metre sub-blocks). The
MNFWZ model is comprised of eight interpreted three-dimensional
wireframes which were the primary estimation domain and hard
boundaries were used to constrain the interpolation of grades into
the block model. Interpolation parameters have been derived based
on geostatistical analysis conducted on one metre composited drill
hole. Block grades have been estimated using Ordinary Kriging
("OK") methodology and the Mineral Resources have been classified
based on proximity to sample data and the continuity of
mineralization in accordance with CIM Definition Standards and
Estimation Best Practices. The MNFWZ resource has been estimated
using a total of 931 diamond drill holes with 3,221 sample
composites.
Mala Noche Vein ("MNV") Resources
were updated with the same NSR formula used for MNFWZ and depleted
for mining activities until October 24,
2018. No drilling was completed at MNV since 2017. Capstone
believes the parameters and methodology are sufficient to consider
the MNV Mineral Resources as current for reporting purposes.
About Capstone Mining Corp.
Capstone Mining Corp. is a Canadian base metals mining company,
focused on copper. We are committed to the responsible development
of our assets and the environments in which we operate. Our two
producing mines are the Pinto Valley copper mine located in
Arizona, US and the Cozamin
polymetallic mine in Zacatecas State, Mexico. In addition, Capstone has the large
scale 70% owned copper-iron Santo
Domingo development project in Region III, Chile, in partnership with Korea Resources
Corporation, the Minto copper mine
in Yukon, Canada currently on care
and maintenance, as well as a portfolio of exploration properties.
Capstone's strategy is to focus on the optimization of operations
and assets in politically stable, mining-friendly regions, centred
in the Americas. Our headquarters are in Vancouver, Canada and we are listed on the
Toronto Stock Exchange (TSX). Further information is available
at http://www.capstonemining.com.
Quality Assurance
The technical information in this news release has been prepared
in accordance with Canadian regulatory requirements set out in
National Instrument 43-101 Standards of Disclosure for Mineral
Projects of the Canadian Securities Administrators ("NI 43-101")
and supervised and reviewed by Brad
Mercer, P. Geol., Capstone's Senior Vice President,
Exploration and Operations, a "Qualified Person" as defined in
National Instrument 43-101 and the person who oversees the Cozamin
Mine property. In addition, Gregg
Bush, Capstone's Senior Vice President and Chief Operating
Officer, reviewed and approved this news release.
A National Instrument 43-101 ("NI 43-101") Technical Report will
be prepared by the Qualified Persons and will be filed on SEDAR
within 45 days of this news release. Readers are cautioned that the
conclusions, projections and estimates set out in this news release
are subject to important qualifications, assumptions and
exclusions, all of which will be detailed in Technical Report. To
fully understand the summary information set out above, the
Technical Report that will be filed on SEDAR at
http://www.sedar.com should be read in its entirety.
Analyses for copper, zinc, lead, and silver were completed by
ALS Minerals laboratory using the following method. The entire
sample is crushed to a minimum of 70% passing a 2mm screen. A 250g
subsample of the crushed material is then pulverized to 85% passing
75 micron. Copper, zinc, lead and silver are determined by ICP
analysis after 4 acid digestion of a 0.25g subsample of the
pulverized material. Cozamin Mine Laboratory analyzed 7.5% of the
samples since 2012. The entire sample was crushed to a minimum of
80% passing 9.5mm. A 200g subsample is then pulverized to 100%
passing 74 micron. Copper, zinc, lead and silver are determined by
ICP analysis after 3 acid digestion of a 0.2g subsample of
pulverized material. Blank, standard and duplicate samples are used
for quality assurance and quality control for samples submitted to
both laboratories.
Cautionary Note Regarding Forward-Looking
Information
This document may contain "forward-looking information" within
the meaning of Canadian securities legislation and "forward-looking
statements" within the meaning of the United States Private
Securities Litigation Reform Act of 1995 (collectively,
"forward-looking statements"). These forward-looking statements are
made as of the date of this document and Capstone Mining Corp. (the
"Company") does not intend, and does not assume any obligation, to
update these forward-looking statements, except as required under
applicable securities legislation.
Forward-looking statements relate to future events or future
performance and reflect our expectations or beliefs regarding
future events. Forward-looking statements include, but are not
limited to, statements with respect to the estimation of mineral
resources and mineral reserves, the realization of mineral reserve
estimates, the timing and amount of estimated future production,
costs of production and capital expenditures, the success of our
mining operations, environmental risks, unanticipated reclamation
expenses and title disputes. In certain cases, forward-looking
statements can be identified by the use of words such as "plans",
"expects", "budget", "scheduled", "estimates", "forecasts",
"intends", "anticipates", "believes" or variations of such words
and phrases, or statements that certain actions, events or results
"may", "could", "would", "might" or "will be taken", "occur" or "be
achieved" or the negative of these terms or comparable terminology.
In this document certain forward-looking statements are identified
by words including "anticipated", "expected" and "converting". By
their very nature, forward-looking statements involve known and
unknown risks, uncertainties and other factors that may cause our
actual results, performance or achievements to be materially
different from any future results, performance or achievements
expressed or implied by the forward-looking statements. Such
factors include, amongst others, risks related to actual results of
current exploration activities, inherent hazards associated with
mining operations, future prices of copper and other metals,
compliance with financial covenants, surety bonding, our ability to
raise capital, Capstone's ability to acquire properties for growth,
counterparty risks associated with sales of our metals, use of
financial derivative instruments and associated counterparty risks,
foreign currency exchange rate fluctuations, changes in general
economic conditions, accuracy of mineral resource and mineral
reserve estimates, operating in foreign jurisdictions with risk of
changes to governmental regulation, compliance with governmental
regulations, compliance with environmental laws and regulations,
reliance on approvals, licences and permits from governmental
authorities, impact of climatic conditions, aboriginal title claims
and rights to consultation and accommodation, land reclamation and
mine closure obligations, increased operating and capital costs,
challenges to title to our mineral properties, maintaining ongoing
social license to operate, dependence on key management personnel,
potential conflicts of interest involving our directors and
officers, corruption and bribery, limitations inherent in our
insurance coverage, labour relations, increasing energy prices,
competition in the mining industry, cybersecurity threats, legal
proceedings and other risks of the mining industry as well as those
factors detailed from time to time in the Company's interim and
annual financial statements and management's discussion and
analysis of those statements, all of which are filed and available
for review under the Company's profile on SEDAR
at http://www.sedar.com. Although the Company has attempted to
identify important factors that could cause our actual results,
performance or achievements to differ materially from those
described in our forward-looking statements, there may be other
factors that cause our results, performance or achievements not to
be as anticipated, estimated or intended. There can be no assurance
that our forward-looking statements will prove to be accurate, as
our actual results, performance or achievements could differ
materially from those anticipated in such statements. Accordingly,
readers should not place undue reliance on our forward-looking
statements.
Cautionary Note to United States Investors
This news release contains disclosure that has been prepared in
accordance with the requirements of Canadian securities laws, which
differ from the requirements of U.S. securities laws. Without
limiting the foregoing, this news release refers to a technical
report that uses the terms "indicated" and "inferred" resources.
U.S. investors are cautioned that, while such terms are recognized
and required by Canadian securities laws, the SEC does not
recognize them. Under U.S. standards, mineralization may not be
classified as a "reserve" unless the determination has been made
that the mineralization could be economically and legally produced
or extracted at the time the reserve determination is made. U.S.
investors are cautioned not to assume that all or any part of
indicated resources will ever be converted into reserves. U.S.
investors should also understand that "inferred resources" have a
great amount of uncertainty as to their existence and as to whether
they can be mined legally or economically. It cannot be assumed
that all or any part of "inferred resources" will ever be upgraded
to a higher category. Therefore, U.S. investors are also cautioned
not to assume that all or any part of inferred resources exist, or
that they can be mined legally or economically. Accordingly,
information concerning descriptions of mineralization and resources
contained in this news release may not be comparable to information
made public by U.S. companies subject to the reporting and
disclosure requirements of the SEC.
Paul Jones, VP, Business
Development and Investor Relations, 604-674-0891,
pjones@capstonemining.com
