Tanzanian Royalty Exploration Corporation is pleased to announce
that extremely positive results have been received from laboratory
test work on surface gravels collected from its recently acquired
Lunguya Primary Mining Licenses (PMLs) in northern
Tanzania.
The laboratory test work was intended to establish the
mineralogical (physical) characteristics of gold contained within
an extensive auriferous (gold bearing) quartz rubble bed identified
at Lunguya, along with suitable gravity-based recovery methods to
extract gold from the gravels which are essentially broken and
fractured surface rock.
The newly acquired licenses are associated with the Company's
Lunguya Gold Project which is situated within the Kahama District
of the United Republic of Tanzania.
In July 2010, the Company acquired two active PMLs that now form
the core of its Lunguya Gold Prospect. Preliminary fieldwork on
these PMLs has thus far established the presence of a substantial
gold-mineralized surface quartz rubble bed along a strike length of
2,000 metres (1.2 miles) with an average width of 200 metres. These
type beds are often associated with major gold deposits in the Lake
Victoria Greenstone Belt of Tanzania.
The objectives for the laboratory test work were threefold:
Conduct a grade analysis based on the size of the gravel particles
in order to establish the average gold grade and distribution of
gold values relative to the particle sizes of the gravels; the
second was to understand the mineralogical associations of the gold
mineralization (i.e. physical attributes of the gold-bearing
minerals); while the third objective was to understand the nature
and mode of occurrence (including the size fractions in which most
of the gold occurs) of the gravity-recoverable gold in the sample
material. Results from this work will assist with the preliminary
establishment of cost effective methods to recover gold from this
potentially economic rubble deposit.
The Company’s immediate plans are to conduct further detailed
evaluation of this quartz rubble zone through close-spaced pitting
and trenching (bulk sampling) and Reverse Circulation (RC) drilling
for reef and resource definition purposes.
Highlights from the metallurgical test work on the bulk sample
include:
1. Chemical analysis of sample material returned values
of 3.58g/t, 5.75g/t, 2.33g/t and 3.31g/t, giving an
average “head grade” for
gold of 3.74g/t. (The “head grade” refers to
the average grade of the material submitted for processing and
analysis).
2. Gold grading analysis for sample material with a
head grade of 3.38g/t indicated the presence of
substantial gold in all size fractions (particle sizes).
Significantly 26% of the gold was confined to the 25
micron fraction (a micron is one-millionth of a metre or
approximately .00004 inch), 20% reported to the +25
to + 53 micron fraction, 12% reported to the +75
micron fraction, 28% reported to the +106
micron fraction and 14% to the + 212
micron fraction. This is considered significant because free
gold can lie in the finer size fractions and is amenable to
concentration using enhanced gravity separation techniques.
As a matter of explanation, the distribution of gold based on
particle size is of major importance in mineral processing. The
behavior of particles in crushing and grinding circuits,
concentration operations, and solid-liquid separations is strongly
dependent on size. Determining the distribution of gold particles
in their respective particle sizes facilitates the gold recovery
process.
3. Heavy Liquid Separation (HLS) analysis, a laboratory
technique for separating gold particles by allowing them to settle
through, or float above, a fluid of intermediate density, indicated
that the gold is significantly amenable to gravity upgrading
with 55% of the gold and only 3% of the sample mass
reporting to HLS sinks (i.e. settling through the intermediate
density fluid).
4. Gravity separation analysis indicated that a
significant proportion of the gold is extractable using a Falcon
Gravity Separator (an enhanced gravity separation device)
with 54% of the gold and only 1.4% of the sample mass
reporting to gravity concentrate.
5. Mineralogical composition of the gold ore is 76%
quartz, 13% kaolinite and minor amounts of feldspars, chlorite,
muscovite and zircon. Sulphide mineralization associated with the
gold includes trace amounts of pyrite, galena, bismuthinite,
chalcopyrite/bornite and chalcocite. No refractory issues with
respect to the ore grade mineralization have been identified.
6. Analytical work on the gravity
concentrate shows that up to 98% of the gold is native
with variable amounts of silver-sulphide, silver-copper-sulphide
and silver-telluride phases.
7. Testing indicated that 97% of the gold in the gravity
concentrate is well exposed and it is expected that intensive
cyanidation of the gravity concentrate will lead to gold recoveries
(from the concentrate) of up to 100%.
"The high grade nature of these loose rubble beds together with
the relatively high degree of liberation and availability of the
gold indicated by these results is highly encouraging to say the
least," said Joseph Kahama, Tanzanian Royalty’s President.
"While the results of this early work cannot be considered
definitive at this point, these tests have demonstrated that the
Lunguya surface rubble zone assessed to date is amenable to
producing economic gold recoveries using standard and basic
gravity-based ore dressing processes that can then be further
enhanced with other relevant chemical-based extractive technologies
on the gravity concentrate."
Analysis
The preliminary, diagnostic metallurgical test work (SGS
Mineralogical Report No: MIN0810/136) was completed on a composite
bulk sample of surface rubble approximately 45kg in weight. The
sample was stage-crushed to achieve 100% passing 1.7mm. 10kg of the
crushed material of each sample was subsequently milled to 50%
passing -75micron mesh. Grading analysis was conducted on a 500g
split (of 50% -75microns) of which six size fractions (+212micron,
-212/+106micron, -106/+75micron, -75/+53micron, -53/+25micron &
-25micron) were individually produced and assayed independently.
Concentrates and tailings from 2 x 4kg of each sample generated by
gravity separation using a Falcon Gravity Separator were assayed in
order to calculate the overall gold distribution.
Qualified Person(s)
The preliminary metallurgical test work program was conducted by
Mineralogist L. L. Coetzee of SGS Laboratory in South Africa under
the supervision of Senior Mineralogist Solly J. Theron. The
planning, execution and monitoring of quality control programs at
the Lunguya Gold project are under the supervision of Mr. Peter T.
Zizhou, P.Geo. and Riaan Van der Weisterhuizen, Tanzanian Royalty’s
Senior Vice President. Mr. Zizhou is a qualified person with
SACNASP (Reg. No.400028/08) as defined by National
Instrument 43-101. Tanzanian Royalty Exploration Corporation
utilizes an industry standard protocol with respect to
sampling procedures. Blanks and certified reference standards are
inserted into the sample stream to monitor laboratory performance
and duplicates of pulps and bulk rejects are also used to monitor
laboratory performance.
Additional information and public documents about Tanzanian
Royalty Exploration Corporation, including drill hole intercepts,
drill collar maps, and images of 2007-2009 exploration activities,
can be viewed at the Company's
website www.TanzanianRoyaltyExploration.com.
Respectfully Submitted,
Joseph Kahama
Joseph Kahama
President
For further information, please contact
Investor Relations at 1-800-811-3855
Visit our website:
www.TanzanianRoyaltyExploration.com
The Toronto Stock Exchange and NYSE Amex
Equities have not reviewed and do not accept responsibility for the
adequacy or accuracy of this release
Cautionary Note to U.S. Investors - The United States
Securities and Exchange Commission limits disclosure for U.S.
reporting purposes to mineral deposits that a company can
economically and legally extract or produce. We use certain terms
on this news release, such as “reserves”, “resources”, “geologic
resources”, “proven”, “probable”, "measured", "indicated", or
"inferred" which may not be consistent with the reserve definitions
established by the SEC. U.S. Investors are urged to consider
closely the disclosure in our Form 20-F, File No. 001-32500.
You can review and obtain copies of these filings from the SEC's
website at http://www.sec.gov/edgar.shtml.
Certain information presented in this release may constitute
“forward-looking statements” within the meaning of the Private
Securities Litigation Reform Act of 1995. Such
forward-looking statements are based on numerous assumptions, and
involve known and unknown risks, uncertainties and other factors,
including risks inherent in mineral exploration and development,
which may cause the actual results, performance, or achievements of
the Company to be materially different from any projected future
results, performance, or achievements expressed or implied by such
forward-looking statements. Investors are referred to our
description of the risk factors affecting the Company, as contained
in our Form 20-F, File No. 001-32500, for more information
concerning these risks, uncertainties, and other factors.
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