Vista Gold Corp. Reports Drilling and Initial Metallurgical Test Results for the Historic Heap Leach Pad at Mt. Todd in Austral
16 Mai 2012 - 12:40PM
PR Newswire (Canada)
DENVER, May 16, 2012 /CNW/ - Vista Gold Corp. ("Vista" or the
"Company") is pleased to announce the initial results of a sampling
and metallurgical testing program on the existing heap leach pad at
its Mt. Todd gold project in Northern Territory, Australia. To
date, the existing heap leach pad has been considered an
environmental liability; however, as part of the ongoing
feasibility study, Vista completed a review of the historic blast
hole and production data associated with the heap leach pad and
concluded that there may be potential to recover additional gold
from the existing heap leach pad. (Photo:
http://photos.prnewswire.com/prnh/20120516/LA08127-INFO) In order
to evaluate this potential, Vista initiated an evaluation of the
existing heap leach pad in December 2011 by completing 12 drill
holes and collecting 165 one-meter samples (two were damaged in
transit). The one-meter assays were submitted to Northern Australia
Laboratories ("NAL") in Pine Creek, Australia, for analysis. In
April 2012, Vista completed an additional 12 drill holes and
collected 160 one-meter samples which were also submitted to NAL
for analysis. The results are presented in the following tables.
__________________________________________________________________
|December 2011 Heap Leach Pad Drill Hole Results |
|__________________________________________________________________|
| | | |
|_________|__________________|_____________________________________|
| |Grid Co-ordinates |Drill Hole Composite Assay | |
|__________________|_____________________________________| |Hole #
|GDA94 |GDA94 |From|To |Interval|Grade |Grade | | |Grid |Grid |(m)
|(m) |(m) | |(ppm Cu)| | |Easting |Northing | | | |(g/t Au)| |
|_________|________|_________|____|_____|________|________|________|
|DLC-001 |188686.0|8434989.0|0.0 |10.0 |10.0 |0.51 |346 |
|_________|________|_________|____|_____|________|________|________|
|DLC-002 |188716.0|8434918.0|0.0 |10.0 |10.0 |0.58 |263 |
|_________|________|_________|____|_____|________|________|________|
|DLC-003 |188768.0|8434833.0|0.0 |10.0 |10.0 |0.50 |212 |
|_________|________|_________|____|_____|________|________|________|
|DLC-004 |188904.0|8434895.0|0.0 |15.0 |15.0 |0.62 |371 |
|_________|________|_________|____|_____|________|________|________|
|DLC-005 |188839.0|8435040.0|0.0 |15.0 |15.0 |0.95 |370 |
|_________|________|_________|____|_____|________|________|________|
|DLC-006 |188795.0|8435130.0|0.0 |15.0 |15.0 |0.47 |379 |
|_________|________|_________|____|_____|________|________|________|
|DLC-007 |189014.0|8434934.0|0.0 |15.0 |15.0 |0.71 |297 |
|_________|________|_________|____|_____|________|________|________|
|DLC-008 |188937.0|8435088.0|0.0 |15.0 |15.0 |0.72 |285 |
|_________|________|_________|____|_____|________|________|________|
|DLC-009 |188892.0|8435178.0|0.0 |15.0 |15.0 |0.41 |271 |
|_________|________|_________|____|_____|________|________|________|
|DLC-010 |189095.0|8434967.0|0.0 |15.0 |15.0 |0.65 |300 |
|_________|________|_________|____|_____|________|________|________|
|DLC-011 |189015.0|8435133.0|0.0 |15.0 |15.0 |0.44 |454 |
|_________|________|_________|____|_____|________|________|________|
|DLC-012 |188975.0|8435216.0|0.0 |15.0 |15.0 |0.38 |300 |
|_________|________|_________|____|_____|________|________|________|
|All Holes| | |0.0 |165.0|165.0 |0.58 |325 |
|_________|________|_________|____|_____|________|________|________|
Based on the assay results of the initial 12 drill holes, Vista
selected 38 samples for bottle roll testing at ALS/Ammtec in Perth,
Australia. The bottle roll tests (a test used to determine the
amount of cyanide soluble gold in samples) were run on 1 kg samples
for 240 hours with 0.05% cyanide. The results of the bottle roll
tests are shown in the included graph and the 38 bottle roll tests
resulted in an average recovery of 32.9% of the gold present in the
samples. These test results led Vista to initiate column leach
testing at ALS/Ammtec. Currently, 7 (50 kg) column tests are in
progress, the results of which are not expected to be available
until late August 2012.
__________________________________________________________________
|April 2012 Heap Leach Pad Drill Hole Results |
|__________________________________________________________________|
| | | |
|_________|__________________|_____________________________________|
| |Grid Co-ordinates |Drill Hole Composite Assay | |
|__________________|_____________________________________| |Hole #
|GDA94 |GDA94 |From|To |Interval|Grade |Grade | | |Grid |Grid |(m)
|(m) |(m) | |(ppm Cu)| | |Easting |Northing | | | |(g/t Au)| |
|_________|________|_________|____|_____|________|________|________|
|DLC-013 |188608.0|8435067.0|0.0 |10.0 |10.0 |0.65 |194 |
|_________|________|_________|____|_____|________|________|________|
|DLC-014 |188675.0|8435046.0|0.0 |10.0 |10.0 |0.36 |243 |
|_________|________|_________|____|_____|________|________|________|
|DCL-015 |188675.0|8435045.0|0.0 |10.0 |10.0 |0.58 |546 |
|_________|________|_________|____|_____|________|________|________|
|DCL-016 |188701.0|8434856.0|0.0 |10.0 |10.0 |0.64 |241 |
|_________|________|_________|____|_____|________|________|________|
|DCL-017 |188880.0|8434952.0|0.0 |15.0 |15.0 |0.55 |490 |
|_________|________|_________|____|_____|________|________|________|
|DCL-018 |188831.0|8435172.0|0.0 |15.0 |15.0 |0.51 |300 |
|_________|________|_________|____|_____|________|________|________|
|DLC-019 |188945.0|8435197.0|0.0 |15.0 |15.0 |0.51 |244 |
|_________|________|_________|____|_____|________|________|________|
|DLC-020 |189028.0|8435058.0|0.0 |15.0 |15.0 |0.41 |258 |
|_________|________|_________|____|_____|________|________|________|
|DLC-021 |189099.0|8435009.0|0.0 |15.0 |15.0 |0.57 |278 |
|_________|________|_________|____|_____|________|________|________|
|DLC-022 |189140.0|8435047.0|0.0 |15.0 |15.0 |0.57 |295 |
|_________|________|_________|____|_____|________|________|________|
|DLC-023 |189094.0|8435146.0|0.0 |15.0 |15.0 |0.43 |352 |
|_________|________|_________|____|_____|________|________|________|
|DLC-024 |189024.0|8435209.0|0.0 |15.0 |15.0 |0.58 |460 |
|_________|________|_________|____|_____|________|________|________|
|All Holes| | |0.0 |160.0|160.0 |0.53 |328 |
|_________|________|_________|____|_____|________|________|________|
Historic records indicate that the existing heap leach pad has
between 13.2 and 18 million tonnes of crushed, agglomerated
material on it. A figure showing the locations of the 24 drill
holes on the existing heap leach pad can be found on the Internet
at http://vistagold.com/mt_todd.php?subpage=heap_leach_pad. Fred
Earnest, Vista's President & CEO, stated "The drilling and
subsequent bottle roll test results from the existing Mt. Todd heap
leach pad are causing us to consider some new aspects of the Mt.
Todd gold project. The potential to convert what we had previously
considered to be a brownfield site liability to a potential revenue
generating component of the project could represent a potentially
significant source of additional value. We are in the process of
evaluating the potentially favorable implications and timing of
gold production from the existing heap leach pad and believe that
the heap leach pad should be incorporated into the definitive Mt.
Todd feasibility study. We are currently evaluating the impact this
may have on our current feasibility study." The samples were
obtained using a rotary aircore drill and were collected by
employees or contractors of the Company or its subsidiaries under
the direction of Vista's Vice President of Exploration, Mr. Frank
Fenne P.G., who is a "qualified person" within the meaning of
Canadian National Instrument 43-101?Standards of Disclosure for
Mineral Projects. The reported assays are from an initial split
that were prepared and assayed by NAL. These assays were used to
select composites that were subsequently assayed by ALS/Ammtec. Mr.
Frank Fenne has approved the scientific and technical information
disclosed in this press release. About Vista Gold Corp. Vista is
focused on the development of the Mt. Todd gold project in Northern
Territory, Australia, to achieve its goal of becoming a gold
producer. Vista is advancing exploration on its Guadalupe de los
Reyes gold/silver project in Mexico and has granted Invecture
Group, S.A. de C.V. a right to earn a 62.5% interest in the
Concordia gold project in Mexico. Vista's other holdings include
the Awak Mas gold project in Indonesia and the Long Valley gold
project in California. For more information about our projects,
including technical studies and resource estimates, please visit
our website at www.vistagold.com. This press release contains
forward-looking statements within the meaning of the U.S.
Securities Act of 1933, as amended, and U.S. Securities Exchange
Act of 1934, as amended, and forward-looking information within the
meaning of Canadian securities laws. All statements, other than
statements of historical facts, included in this press release that
address activities, events or developments that Vista expects or
anticipates will or may occur in the future, including such things
as, expected exploration results, expected timing for results of
the column leach testing, potential to convert brownfield site
liability to a revenue generating component of the Mt. Todd gold
project resulting in a potentially significant source of additional
value, potential for favorable implications and timing of gold
production from the existing heap leach pad at the Mt. Todd gold
project, the inclusion of the heap leach pad into the definitive
Mt. Todd feasibility study, the completion of a feasibility study
for the Mt. Todd gold project, and other such matters are
forward-looking statements and forward-looking information. The
material factors and assumptions used to develop the
forward-looking information and the forward-looking information
contained in this press release include the following: results of
feasibility studies, mineral resource and reserve estimates,
exploration and assay results, terms and conditions of our
agreements with contractors and our approved business plan. When
used in this press release, the words "optimistic," "potential,"
"indicate," "expect," "intend," "hopes," "believe," "may," "will,"
"if," "anticipate," and similar expressions are intended to
identify forward-looking statements and forward-looking
information. These statements involve known and unknown risks,
uncertainties and other factors which may cause the actual results,
performance or achievements of Vista to be materially different
from any future results, performance or achievements expressed or
implied by such statements. Such factors include, among others,
uncertainty of resource estimates, estimates of results based on
such resource estimates; risks relating to completing column leach
testing; risks relating to cost increases for capital and operating
costs; risks relating to delays in the completion of anticipated
drilling activities at the Mt. Todd gold project, risks related to
the timing and the ability to obtain the necessary permits, risks
of shortages and fluctuating costs of equipment or supplies; risks
relating to fluctuations in the price of gold; the inherently
hazardous nature of mining-related activities; potential effects on
Vista's operations of environmental regulations in the countries in
which it operates; risks due to legal proceedings; risks relating
to political and economic instability in certain countries in which
it operates; as well as those factors discussed under the headings
"Note Regarding Forward-Looking Statements" and "Risk Factors" in
Vista's Amendment # 1 to its Annual Report on Form 10-K as filed on
April 5, 2012 and other documents filed with the U.S. Securities
and Exchange Commission and Canadian securities regulatory
authorities. Although Vista has attempted to identify important
factors that could cause actual results to differ materially from
those described in forward-looking statements and forward-looking
information, there may be other factors that cause results not to
be as anticipated, estimated or intended. Except as required by
law, Vista assumes no obligation to publicly update any
forward-looking statements or forward-looking information; whether
as a result of new information, future events or otherwise. For
further information, please contact Connie Martinez at (720)
981-1185. SOURCE Vista Gold Corp. Vista Gold Corp. CONTACT:
http://www.vistagold.comhttp://photos.prnewswire.com/prnh/20120516/LA08127-INFOPRN
Photo Desk, photodesk@prnewswire.com
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