Quaterra Announces Significant Increase of Copper Resource and Grade at the Yerington Copper Project, Nevada
20 Novembro 2013 - 10:30AM
Marketwired Canada
Quaterra Resources Inc. (TSX VENTURE:QTA)(NYSE MKT:QMM) (the Company) today
announced that an updated independent resource estimate at the Company's
historic Yerington pit has increased the measured and indicated contained pounds
of copper by approximately 26%, reflecting an 11% increase in grade and a 14%
increase in tons. The study, completed by Quaterra's wholly owned subsidiary
Singatse Peak Services, LLC (SPS), increases the resource to 751M pounds of
measured and indicated copper and 718M pounds of inferred copper.
"This increase in the Yerington pit resource is a very positive development for
us and reinforces our commitment to focus on advancing our copper projects in
the Yerington District," says Quaterra President and CEO Steven Dischler. "The
updated Yerington Pit resource, along with our nearby MacArthur project,
provides opportunities to advance a significant oxide and sulfide copper mine in
the Yerington District."
Details of Yerington Pit Resource Estimate
Tetra Tech, Inc. of Golden, Colorado, has completed an updated Canadian National
Instrument NI 43-101 compliant independent resource estimate for mineralization
in and around the historic Yerington pit which supersedes its previous report
completed in the first quarter 2012. The current Tetra Tech resource estimate is
based upon 232 additional historic Anaconda drill holes unavailable when the
previous report was completed. The current resource estimate now includes data
from over 800 boreholes.
These additional holes were well distributed throughout the deposit and provided
infill and extensional information to the previously used data, allowing
upgrades in classification, improved grade estimation and a new resource
definition.
A summary of measured, indicated and inferred resources is shown in the table at
the end of this news release. At a copper cutoff grade of 0.12%, measured and
indicated oxide resources increased 28% in tons, 37% in pounds of contained
copper and 9% in grade. At a copper cutoff grade of 0.15%, sulfide measured and
indicated resources increased 12% in tons, 25% in pounds of contained copper and
12% in grade. Inferred oxide and sulfide resources combined reflect similar
increases (4% in tons, 10% in grade and 14% in pounds of contained copper) as
shown in the attached table.
Because mineralization extends beyond the limit of drilling, the data clearly
show the possibility exists to expand the resource, particularly below the pit
and on its western end. Not only do numerous historic holes drilled by Anaconda
bottom in mineralization, but drill hole intercepts along the western edge of
the pit are some of the best in the database.
SPS has commissioned Tetra Tech to prepare a NI 43-101-compliant Technical
Report for the Yerington copper project. The Tetra Tech resource estimate for
the project will be included with a description of the project history, geology,
mineralization, sampling procedures, and laboratory Quality Assurance/Quality
Control procedures. The NI 43-101 Technical Report will be filed within 45 days
of the date of this release, and will be available at www.sedar.com.
Based on benchmarking of the Yerington deposit to similar deposits, Tetra Tech
has determined that reasonable base case cutoff grades for the leachable
(oxide/chalcocite) SX/EW recoverable copper and for flotation recoverable
primary sulfide resources are 0.12% and 0.15% total copper (TCu) respectively.
----------------------------------------------------------------------------
YERINGTION COPPER PROJECT RESOURCES USING SELECTIVE CUTOFF FOR OXIDE AND
SULFIDE (1,2,3)
----------------------------------------------------------------------------
% CHANGE FROM 2012
MEASURED Cutoff 2013 ESTIMATE ESTIMATE(4)
----------------------------------------------------------------------------
%Cu Tonsx1000 Grade Lbsx1000 Tonsx1000 Grade Lbsx1000
Oxide and
Chalcocite
Material 0.12 6,500 0.25 33,000 8% 10% 17%
Sulfide
(Primary
Material) 0.15 31,000 0.33 205,000 -3% 10% 8%
Combined 0.12,0.15 37,500 0.32 238,000 -1% 10% 9%
----------------------------------------------------------------------------
% CHANGE FROM 2012
INDICATED Cutoff 2013 ESTIMATE ESTIMATE(4)
----------------------------------------------------------------------------
%Cu Tonsx1000 Grade Lbsx1000 Tonsx1000 Grade Lbsx1000
Oxide and
Chalcocite
Material 0.12 17,000 0.25 85,000 37% 9% 47%
Sulfide
(Primary
Material) 0.15 74,000 0.30 428,000 19% 15% 35%
Combined 0.12,0.15 90,000 0.29 513,000 22% 12% 37%
----------------------------------------------------------------------------
MEASURED + % CHANGE FROM 2012
INDICATED Cutoff 2013 ESTIMATE ESTIMATE(4)
----------------------------------------------------------------------------
%Cu Tonsx1000 Grade Lbsx1000 Tonsx1000 Grade Lbsx1000
Oxide and
Chalcocite
Material 0.12 23,500 0.25 118,000 28% 9% 37%
Sulfide
(Primary
Material) 0.15 105,000 0.30 633,000 12% 12% 25%
Combined 0.12,0.15 128,000 0.29 751,000 14% 11% 26%
----------------------------------------------------------------------------
----------------------------------------------------------------------------
% CHANGE FROM 2012
INFERRED Cutoff 2013 ESTIMATE ESTIMATE(4)
----------------------------------------------------------------------------
%Cu Tonsx1000 Grade Lbsx1000 Tonsx1000 Grade Lbsx1000
Oxide and
Chalcocite
Material 0.12 25,900 0.23 118,000 5% 14% 21%
Sulfide
(Primary
Material) 0.15 128,000 0.23 600,000 4% 11% 13%
Combined 0.12,0.15 154,000 0.23 718,000 4% 10% 14%
----------------------------------------------------------------------------
(1) Independent qualified person, Dr. Rex Bryan, prepared and supervised the
preparation of these mineral resources.
(2) All estimated resources are shown using a 0.12% and 0.15% copper cutoff
for oxide and sulfide respectively
(3) Minor rounding errors may occur
(4) NI 43-101 Technical Report, Feb. 17, 2012
This updated mineral resource estimate was completed on November 17, 2013 by
Tetra Tech MM, Inc. of Golden, Colorado, pursuant to Canadian National
Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101"),
and was completed by or under the supervision of Dr. Rex Bryan, SME Registered
Member, an independent Qualified Person (as defined in NI 43-101), utilizing
standard industry software and resource estimation methodology. Dr. Bryan has
reviewed and approved the technical and scientific information contained in this
press release. Previous technical reports contain extensive geologic and
technical information related to the deposit for which the estimate is prepared.
The last technical report was filed on SEDAR on February 17, 2012, and is
entitled "NI 43-101 Technical Report Mineral Resource Yerington Copper Project
Lyon County Nevada". This updated resource estimate incorporates the results of
historical Anaconda assay intervals from 232 drill holes totaling 63,147 feet
not previously available. These results are in addition to the results of
drilling and assaying completed by Anaconda, and Singatse Peak Services (SPS)
which were used in the previous Yerington Copper Project mineral resource
estimate. The press release and full technical reports are available on
Quaterra's website (www.quaterra.com) and on SEDAR. A technical report for the
updated mineral resource estimate will be filed on SEDAR within 45 days of this
press release.
Qualified Persons
The Yerington Pit resource information provided in this release has been
reviewed and approved by Dr. Rex Bryan of Tetra Tech. Dr. Bryan is an
Independent Qualified Person within the meaning of NI 43-101.
This release was also reviewed by Steven Dischler, P.E., and Dr. Thomas Patton,
both of whom are non-independent Qualified Persons within the meaning of NI
43-101.
About Quaterra Resources, Inc.
Quaterra Resources Inc. (TSX VENTURE:QTA)(NYSE MKT:QMM) is a junior exploration
and development company with a successful track record of making significant
mineral discoveries in North America. The Company's primary objective is the
advancement of its flagship projects in the Yerington copper district, Nevada.
The monetization of non-core assets is in progress to accelerate this effort.
On behalf of the Board of Directors,
Mr. Steven Dischler, President & CEO
Should you wish to receive news releases by fax please provide your contact
details to Quaterra at 604-681-9059 (direct), 1-855-681-9059 (toll free) or
email info@quaterra.com.
Disclosure notes:
The results of the Tetra Tech resource estimate have been reviewed by Quaterra
technical staff. The Company believes that the Tetra Tech resource estimate for
the MacArthur Copper Project was conducted in a professional and competent
manner. Inferred resources are resources that have not been defined in
sufficient detail to be characterized as Measured or Indicated resources.
Mineral resources have not had economic considerations applied to them and are
therefore not characterized as Reserves.
The mining terms "indicated resource" and "inferred resource" are used in this
news release in accordance with Canadian regulations but are not recognized by
the United States Securities and Exchange Commission. For clarification, the
Company has no properties that contain "reserves" as defined by the SEC and is
providing the forgoing, in part, in order to meet its requirements under
National Instrument 43-101 adopted by the BC Securities Commission and the
Canadian Securities Administrators.
Some statements contained in this news release are forward-looking statements
within the safe harbor of the Private Securities Litigation Reform Act of 1995.
These statements generally are identified by words such as the Company
"believes", "expects", and similar language, or convey estimates and statements
that describe the Company's future plans, objectives or goals. Since
forward-looking statements are based on assumptions and address future events
and conditions, by their very nature they involve inherent risks and
uncertainties. Further information regarding risks and uncertainties which may
cause results to differ materially from those projected in forward-looking
statements, are included in filings by the Company with securities regulatory
authorities. Readers are cautioned not to place undue reliance on
forward-looking statements, which speak only as of the date thereof. The Company
does not undertake to update any forward-looking statement that may be made from
time to time except in accordance with applicable securities laws. References
may be made in this press release to historic mineral resource estimates. None
of these are NI 43-101 compliant and a qualified person has not done sufficient
work to classify these historic estimates as a current mineral resource. They
should not be relied upon and Quaterra does not treat them as current mineral
resources.
The TSX Venture Exchange and the American Stock Exchange have not reviewed and
do not accept responsibility for the adequacy or accuracy of the contents of
this news release, which has been prepared by management.
FOR FURTHER INFORMATION PLEASE CONTACT:
Quaterra Resources Inc.
Mr. Steven Dischler
President & CEO
775-463-9600
info@quaterra.com
www.quaterra.com
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