Valterra Assays 34% Graphite Head Grade in Metallurgical Grab Sample at Bobcaygeon Property in Southern Ontario
October 17 2012 - 7:50AM
Marketwired Canada
Valterra Resource Corporation (TSX VENTURE:VQA)(FRANKFURT:3VA) ("Valterra" or
the "Company") reports that analytical and optical analyses of a +20kg
metallurgical sample from the Bobcaygeon Graphite Property, located in Southern
Ontario, returned very high head grades of primarily flake graphite with flakes
of up to 3mm in length.
The sample, which was processed by SGS Lakefield, was comprised of float pieces
from a shallow backhoe trench and returned a high-grade assay of 34% C(g). The
assay compares favourably with earlier reported analyses of 1kg grab and select
chip samples from the same trench which returned between 41.9% C(g) and 69.1%
C(g) (see NR-06-12).
Microscopic analyses of the sample provided by SGS Lakefield in a draft
mineralogy report identified the graphite as primarily flaky and platy particles
with size ranges from less than 0.05mm to 3mm (coarse flake graphite is defined
as greater than 80 mesh or 0.177mm) and visually much of the sample appears to
be coarse in nature. Photomicrographs provided as part of this report show
polycrystalline aggregates and lesser acicular (needle-like) grains making up
much of the visible graphite. The complete report with photomicrographs of the
sample is available on Valterra's website at www.valterraresource.com.
A 'Rougher Kinetics' flotation test will be conducted as the final stage of the
metallurgical work and should provide a quantitative estimate of the sample's
flake size distribution and percent recovery.
The metallurgical assay included:
----------------------------------------------------------------------------
Sample C(t) C(g) TOC leco CO2 S
ID % % % % %
----------------------------------------------------------------------------
Graphite 34 34.0 0.13 2.93 0.01
----------------------------------------------------------------------------
The graphite sample was stage crushed to -6 mesh and split into 2kg test charges
for flotation (in progress). Further, head samples for chemical analysis (tabled
above) and mineralogical characterization were extracted. Chemical head analysis
included chemical characterization for a carbon suite (Ct - total carbon, Cg -
total graphite, Corg - total organic carbon, CO2 - carbon dioxide, and S -
sulphur).
Cautionary Note: The grab sample was selective by nature and is unlikely to
represent average grades of the deposit.
President Fred Sveinson, P.Eng., stated: "Valterra is very pleased with these
initial results from the metallurgical testing of the Bobcaygeon Graphite
property, which represent a single occurrence within this +70 sq. km property.
The head grade of the sample and the preliminary flake size assessment provided
by SGS Lakefield suggest a high-grade graphite system not common in Ontario but
with some analogy to the vein or 'lump' graphite systems of the Bogala Mine in
Sri Lanka, which has been producing for over 160 years. Additionally, the low
sulphur content could result in simplified processing and reduced environmental
issues in any future production scenario. These are among the first graphite
samples collected on the property and future work will determine the project
potential through the application of airborne and ground geophysics, further
trenching, and ultimately diamond drilling."
SGS Lakefield has been instructed by Valterra to complete the final phase of the
metallurgy by conducting a 'Rougher Kinetics' laboratory flotation test on the
sample which is expected to provide a quantitative assessment of the flake size
distribution and percent recovery. The kinetics test will use a two-stage
grinding strategy with the products of each incremental flotation stage
evaluated qualitatively under an optical microscope to characterize the quality
of the flotation products. The incremental rougher concentrates will be combined
into two flotation concentrates and submitted for a size fraction analysis. The
two concentrates will be screened at various mesh sizes and the size fractions
and the rougher tails are to be submitted for LOI analysis and C(g) analysis,
respectively, to generate a mass balance. Further the rougher concentrates and
the rougher tails will be subjected to a whole rock analysis by ICP.
Valterra's exploration was conducted in the vicinity of Bass Lake near the City
of Peterborough which is approximately 1.5 hours' drive north of Toronto and is
close to transport, power, and numerous services. Based on the favourable
results returned to date, Valterra has also staked over 2,000 additional
hectares and now controls more than 70 square kilometres. The property package
is well located on the border of the Precambrian Grenville Province and the
Paleozoic Lowlands forming a prospective locale for potential graphitic
deposits. The graphite vein occurrence is within calcitic marbles sitting west
of a syenitic amphibolite unit and the contact is traceable for up to 10-12
kilometres.
Near-term Graphite Exploration Proposal
In 2012-13, Valterra proposes to conduct an airborne geophysical program on the
property in order to detect conductive zones and bodies which may be associated
with graphite. Cost quote estimates have been received from several geophysical
contract firms and upon completion of the kinetics testing the Company expects
to be in a position to implement the survey. Contingent on the airborne results,
surface geophysics, trenching, sampling, and diamond drilling are also proposed.
About Graphite
Graphite is a naturally occurring form of carbon with wide-ranging and unique
physical properties. Graphite is used in the development of graphene, which when
developed industrially, will be a replacement for several expensive electronic
components such as silicon semi-conductors. There are three primary graphite
occurrences naturally - vein, flake, and amorphous where the highest quality
product can sell for over $2,000 per tonne. In pricing graphite, the flake size
is a key factor with the large flake (greater than.177mm) ores commanding the
highest prices in markets dominated by multi-national eco-automobile
manufacturers, high-tech industries and nuclear energy companies. Recent pricing
and demand increases have spurred numerous exploration and investment
opportunities in the graphite market. The Province of Ontario is an excellent
locale to explore owing to superior geology, geoscience knowledge,
infrastructure, political stability and tax incentives. Several projects are
advancing in the graphite field including Northern Graphite Corporation,
Zenyatta Ventures Inc. and Ontario Graphite Ltd.
About Valterra Resource Corporation
Valterra is a Manex Resource Group Company. The group provides expertise in
exploration, administration, and corporate development services for Valterra's
mineral properties located in British Columbia and Ontario. Valterra is focussed
on early stage properties with the potential to host large deposits, in regions
with excellent infrastructure. Over the last several years, Valterra has
acquired and is exploring several key projects including "Star-Toughnut", "Swift
Katie" and "Bobcaygeon" which are located near roads, rail, power, and resource
communities in Canada.
Brian McGrath, P.Geo., is the Qualified Person responsible for reviewing the
technical information presented in this release.
On behalf of the Board of Directors,
Frederick Sveinson, President, Valterra Resource Corporation
For further information, please visit Valterra's website at
www.valterraresource.com.
This news release may contain forward-looking statements including but not
limited to comments regarding the timing and content of upcoming work programs,
geological interpretations, receipt of property titles, potential mineral
recovery processes, etc. Forward-looking statements address future events and
conditions and therefore involve inherent risks and uncertainties. Actual
results may differ materially from those currently anticipated in such
statements. These statements are based on a number of assumptions, including,
but not limited to, assumptions regarding general economic conditions, interest
rates, commodity markets, regulatory and governmental approvals for Valterra
Resource Corporation's projects, and the availability of financing for Valterra
Resource Corporation's development projects on reasonable terms. Factors that
could cause actual results to differ materially from those in forward looking
statements include market prices, exploitation and exploration successes, the
timing and receipt of government and regulatory approvals, and continued
availability of capital and financing and general economic, market or business
conditions. Valterra Resource Corporation does not assume any obligation to
update or revise its forward-looking statements, whether as a result of new
information, future events or otherwise, except to the extent required by
applicable law.
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