Valterra Returns High Purity Graphite Products; Including +99% C from Leach
Testing at the Bobcaygeon Project
VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 03/21/13 -- Valterra
Resource Corporation (TSX VENTURE:VQA)(FRANKFURT:3VA) reports that
preliminary metallurgical results from continued testing on the +20kg
Discovery Zone trench sample from the Bobcaygeon Graphite Project in
southern Ontario has produced medium, coarse and jumbo flake graphite
fractions assaying greater than 94% C(t) by LOI and a high-purity
fine flake graphite fraction, that with additional leaching, returned
99.14% C by double LOI in concentrate. These preliminary flotation
and leaching test results demonstrate the potential to produce
marketable, high-margin graphite products utilizing industry-standard
A combination of crushing, grinding, polishing, and flotation stages
were used to separate the products into various size fractions of
high purity. Two-stage leach testing was conducted on the fine size
fraction (-150 mesh) with the goal of upgrading this material to a
Highlights from the metallurgical testing conducted at SGS Lakefield
-- 55.9% of the concentrate separates into the fine flake category (-150
mesh) grading 91.05% C(t). Leach testing was conducted on this size
fraction upgrading the product to a 99.14% C (Double LOI) and 100% C(t)
-- 31.7% of the concentrate separates into the large and jumbo flake
categories (+80 mesh or greater than 0.178mm) grading 94.9% C by LOI.
This includes 14.6% of the concentrate at a +48 mesh (jumbo flake)
grading 94.7% C by LOI.
-- 12.4% of the concentrate separates into the medium flake category (-80
to +150 mesh) grading 96.3% C by LOI.
-- Total overall concentrate recoveries of 93.3% at a combined concentrate
grade of 93.1% C by LOI.
Processing of the sample continues to return a high percentage of
medium and coarser flake concentrates but more significantly
identified a fine flake concentrate with the potential to produce an
ultra-pure graphite suitable for the synthetic and graphene markets.
The initial head grade of the sample was 34.6% C(g) (see NR-11-12),
which is consistent with field sampling
of the graphite lens exposed
in the drill-ready Discovery Zone trench. Further processing of the
fine flake graphite size fraction will be done in order to determine
a more precise %C(g) value toward a detailed concentrate analyses
pending completion of the work by SGS.
Early results from the project are very encouraging and Valterra is
planning an aggressive exploration program including the evaluation
of near surface geophysical targets and drilling several shallow
"scout" core holes in the Discovery Zone trench area. This work is a
prelude to a more extensive drill program which will systematically
test an 800m x 400m open-ended, near surface IP chargeability anomaly
in the area of the initial discovery, and geophysical and geological
evaluation of other targets on this large +160 sq. km. property.
Recent metallurgical reports, ground-geophysical data, updated
corporate presentations and photographs are available on Valterra's
website at www.valterraresource.com.
Graphite is a naturally occurring form of carbon with wide-ranging
and unique physical properties. Graphene is derived from graphite and
is one of the strongest known substances with a tensile strength 200
times the strength of steel. The industrial development of graphene
is at an early stage but will eventually become a replacement for
several expensive electronic components such as silicon
semi-conductors. There are three natural primary graphite occurrences
- vein, flake, and amorphous where the highest quality product can
command prices in excess of $2,000 per tonne. In pricing graphite,
the flake size is a key factor with the large flake (greater than
0.178mm) 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
accelerated numerous exploration and investment opportunities in the
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.
The Bobcaygeon property is hosted in rocks of the Grenville
geological province which hosts most of the known significant
graphite deposits in Canada.
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
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
Neither 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.
Valterra Resource Corporation
1.888.456.1112 or 604.641.2773
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