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Great Panther Silver Reports Third Quarter
Production and Appoints New Mine Manager at Guanajuato
GREAT PANTHER SILVER LIMITED (TSX: GPR; NYSE Amex: GPL; the
"Company") reports third quarter ("Q3") production at its
two wholly-owned Mexican silver mining operations, Topia
and Guanajuato and appoints Mr. Graham Parsons, MBA, as General Manager of
its Guanajuato Operations.
Ore processed in Q3 is up 16% year on year; however, a significant drop in
ore grades resulted in metal production being lower by 18%. Metal production,
from the two mines, at 484,550 silver equivalent ounces ("Ag eq oz"), included 343,768
ounces silver (Ag oz), 1,494 ounces gold (Au oz), 222 tonnes lead (Pb t), and 294 tonnes zinc (Zn
t). At Guanajuato ore grades are expected to improve in the fourth quarter
("Q4"). The deeper extensions of the Cata
Alto 1 and 2 zones have been explored and found to be significantly higher
grade and production improvements are now anticipated with the addition of
high grade ore from the Alto 1, 1a and 2 zones at the 510 metre
level.
Year to date, the combined metal production is 1.65 million Ag eq oz, as compared to 1.69
million Ag eq oz, for
2010. The estimated production for the fourth quarter is expected to improve
to 550,000 Ag eq oz for a
yearend total of approximately 2.2 million Ag eq
oz. Production targets for 2012 and beyond are currently under review and
management expects to provide further guidance in the fourth quarter.
A new General Manager, Mr. Graham Parsons, MBA, has been appointed for the
Guanajuato Operations. Mr. Parsons is fluent in Spanish, having worked in
underground operations and open pit projects in Spain, Argentina and
Venezuela. He brings a wealth of international mine engineering and
operations management experience to Great Panther. Most recently, he held the
position of COO for Empire Mining Corporation, a junior exploration and
mining company with interests in South-Eastern Europe. Several opportunities
exist to improve production output at Guanajuato and Mr. Parsons is expected
to add the mining expertise and management skills necessary to achieve the
improvements.
The following summarizes the results for the third quarter, 2011:
- Metal
production of 484,550 Ag eq oz is down 18% from Q3 2010
- Silver
production of 343,768 Ag oz is down 10% from
Q3 2010
- Gold
production of 1,494 Au oz is down 32% from Q3
2010
- Plant
throughput at Guanajuato is up 16% from Q3 2010
- Plant
throughput at Topia is up 17% from Q3 2010 and
is a quarterly record
- Exploration
drilling continues with encouraging results from surface at San Ignacio
and Topia, and from underground, at Rayas, Santa Margarita, Cata
and Guanajuatito
- Initial
Inferred Mineral Resource estimate for San Ignacio of 611,000 tonnes at 127g/t silver and 2.05g/t gold (4,494,000
Ag eq oz)
(For consistency, silver equivalents for 2011 have been established and
maintained using budget prices of US$1200/oz Au,
US$20/oz Ag, US$0.90/lb Pb and Zn.)
Guanajuato Mine
The Guanajuato operation processed 41,371 tonnes
(up 16% from Q3 2010), at ore grades of 175g/t Ag and 1.12g/t Au (down 34%
from Q3 2010), to produce 206,061 Ag oz and 1,347
Au oz, or 286,862 Ag eq oz (down 24% from Q3 2010).
Production from the largest mining area, Los Pozos,
accounted for more than half of the throughput, 20,950 tonnes,
and experienced a downturn in ore grades, to an average of 191g/t Ag and
0.88g/t Au, (from 16,700 tonnes at grades of 215g/t
Ag and 0.93g/t Au in the previous quarter). Grade improvement modifications
to the mining method are being implemented and, while they mean a temporary
shortfall in ore tonnes being mined during October,
the overall ore grade is expected to improve in the fourth quarter.
At Cata, which has typically been the highest grade
source of ore, the mined throughput was lower, at 11,250 tonnes,
with grades of 232g/t Ag and 0.91g/t Au (down from 14,000 tonnes,
at ore grades of 266g/t Ag and 1.11g/t Au, in the previous quarter). The
deeper extensions of the Alto 1 and 2 zones have been explored and found to
be significantly higher grade (see Company news release of August 30,
2011). While mining of these zones was expected in Q3, a
short term delay, to allow for the additional diamond drilling, means that
production improvements from Cata are now
anticipated in the fourth quarter with the addition of high grade ore from
the Alto 1, 1a and 2 zones at the 510 level.
Production stoping of the gold-rich Santa Margarita
vein also suffered a temporary shortfall in production, to 2,580 tonnes, with gold grades down to 4.0g/t from an average
of 6.0g/t. Production from this vein will be increased in the fourth quarter
with additional stoping areas being established.
Stoping of the Guanajuatito
North Zone continued from the 120 metre level with
ore production totaling 2,550 tonnes at grades of
159g/t Ag and 0.80g/t Au. Ramp access has been extended to the 160 metre level and initial stope
development is underway.
The Guanajuato plant achieved excellent silver and gold recoveries of 88.4%
and 90.1%, respectively. This represents the first full quarter operating
with the new Outotec flotation plant and
metallurgical performance is expected to improve further as ore quality
improves. Sales of concentrates returned to normal as the inventory backlog
is being reduced with new sales agreements in place.
Underground diamond drilling at Guanajuato totaled 7,084 metres,
with 48 holes completed during the quarter. Drilling tested the potential of the:
- Deep Rayas & Los Pozos
areas -- 16 holes completed for 3,626 metres,
- Guanajuatito Zona Norte area -- 14 holes completed for 2,600 metres,
- Santa
Margarita area -- one hole completed for 192 metres,
and
- Deep Cata area -- 14 holes completed for 578 metres.
Highlights of the Cata drilling include Alto 2 zone
intersections from UG11-135 that returned 6,447g/t silver and 29.44g/t gold
over a width of 3.20 metres, and UG11-137 that
returned 2,114g/t silver and 7.38g/t gold over a width of 5.40 metres. The Alto 1a zone in UG11-137 returned 485g/t
silver and 1.82g/t gold over a width of 4.80 metres,
while the Veta Madre zone in UG11-133 returned
1,347g/t silver and 6.02g/t gold over a width of 2.25 metres.
During the third quarter, the Deep Rayas drill rig
moved to the Los Pozos area and, in the fourth
quarter, will move to deep Valenciana exploration.
The Valenciana area is being rehabilitated and
drill stations established above the 390 metre
level in order to accommodate the deep drilling program. Surface drilling is
also underway to test for unexploited veins adjacent to the richest parts of
the old Valenciana Mine. Drilling to explore the Guanajuatito area will continue, an additional rig has
started ore definition drilling in the Santa Margarita Inferred Mineral
Resource area, and drilling of the deeper Mineral Resource extension area of Cata continues.
Topia Mine
The Topia operation reported metal production of
137,707 oz of silver (up 5% from Q3 2010), 147 oz of gold, 489,770 lbs of
lead, and 648,657 lbs of zinc, from milling 12,004 tonnes of ore (up by 17% from Q3 2010 and a quarterly
processing record). This equates to 197,688 Ag eq oz, which is 6% down from Q3 2010.
Ore grades averaged 420g/t Ag, 0.47g/t Au, 2.02% Pb
and 2.67% Zn. In terms of Ag eq oz
per tonne milled, the grades were 12% down against
the grades for Q3 2010.
The processing record was achieved in spite of the traditional rainy season
causing road haulage delays from the small mines to the plant. Metallurgical
performance suffered slightly as a result of handling wet, sticky ore. The
crushing plant screen plugged resulting in a coarser crushing and grinding
product. Gold recovery was 80.4%, silver recovery was 85.0%, lead recovery
was 91.4% and zinc recovery was 91.9%. Lead concentrate grades of 50.31% Pb and 9,205g/t Ag were achieved while the zinc
concentrate averaged 55.49% Zn and 640g/t Ag. In addition to processing the
Company's ore, 3,115 tonnes were custom milled for
a local miner, thereby increasing revenue and keeping unit costs down.
Mine development continued to extend known areas and provide access to new
mining areas. At the San Gregorio/El Rosario vein operations, exploratory
development to access the veins at the 1630 metre
elevation proved successful. At the Durangueno
mine, the San Gregorio vein is being mined at the 1,475 metre
elevation. As there are currently limited Mineral Resources defined and no
previous exploitation between the 1,475 and 1,660 metre
elevations, these developments will provide for additional production and add
new Mineral Resources.
Exploratory development at the La Prieta mine has
also been successful, exposing a high grade vein, and ore is now being hauled
to the plant. This is a past producing mine with modest Inferred Mineral
Resources and large exploration potential, which is expected to add silver
production in the fourth quarter.
At the Argentina mine, ramp development has been completed to the third
level, providing access for exploratory development in a new area of Inferred
Mineral Resources. This new development will provide for additional
production over the coming months.
A total of 587 metres of underground diamond
drilling was completed in 11 diamond drill holes. Drilling was carried out to
test for additional resources on many vein structures including Animas, Don
Benito, Veta Madre, San Jorge and Cantarranas.
A new surface program of 7,000 metres started with
the completion of four diamond drill holes for a total of 607 metres. All four holes targeted veins at the La Prieta mine.
San Ignacio Property
The San Ignacio mine property covers approximately four kilometres
of strike length on the La Luz vein system, which is parallel to, and five kilometres west of, the principal Veta
Madre structure that hosts Great Panther Silver's main Guanajuato mines.
Silver-gold mineralization was initially discovered a year ago. Diamond core
drilling has continued in Q3 with the completion of 18 diamond core holes for
a total of 4,881 metres.
Seven silver-gold mineralized zones have now been delineated by the 2010-2011
diamond drilling at San Ignacio, namely (from west to east) the Melladito, Intermediate, Intermediate 5, Intermediate 2, Nombre de Dios, Nombre de Dios
Footwall 1 ("FW1"), and Nombre de Dios
Footwall 2 ("FW2").
An initial, NI 43-101 compliant, Mineral Resource estimate has been published
(see Company news release of October 11,
2011). The estimate comprises Inferred Mineral Resources
of 611,000 tonnes at 127g/t silver and 2.05g/t gold
(4,494,000 Ag eq oz),
using a 118g/t Ag Eq cut-off grade. Drilling is
continuing, with a total of 40 holes now completed, and the Mineral Resource
will be updated on a periodic basis.
The Company has started the permit application process, including a Baseline
Environmental Study in preparation of an Environmental Impact Assessment.
During the course of development, any ore from the San Ignacio mine property
will be trucked to Great Panther's Guanajuato plant for processing, where the
capacity currently exists to double ore throughput.
Outlook
Great Panther Silver continues to work towards achieving the goals of its
three-year (2010-12) growth strategy for its two operations however
production targets for fiscal 2012 are currently under review. Key to the
success of the growth strategy is the delineation of new NI 43-101 compliant
Mineral Resources, and drilling has been accelerated during 2011 to achieve
these goals for 2012.
NI 43-101 compliant Mineral Resource estimates by RPA have been published for
both operations and an initial Mineral Resource estimate has been released
for the San Ignacio Property. Mineral Resources for Topia
support current and future mine expansions and the plant capacity has been
increased to 275 tonnes per day ("tpd"). Mineral Resource estimates for Guanajuato
support medium term production goals and plant capacity has already exceeded
what is required to achieve these. The published Mineral Resources do not
include estimates for the Guanajuatito area between
120 and 400 metre level which is being explored and
still open to depth and on strike. No Mineral Resources are included yet for
the Valenciana Mine where underground and surface
drilling is underway.
Mine production estimates for 2011 have been revised to 2.2 million Ag eq oz to reflect the production
to date and the revised expectations for the fourth quarter. While this
demonstrates no growth from the previous year, both operations show good
opportunities for realizing continued growth into 2012 and the plants at both
Guanajuato and Topia have been upgraded in
anticipation of this increased throughput. The San Ignacio project is
expected to realize its potential during 2012 with an intensive Exploration
and Mine Development program being planned and will no doubt add to the
growth potential for 2013.
Robert F. Brown, P.Eng. and
Vice President of Exploration for the Company is the Qualified Person for
both the Guanajuato Mine and the Topia Mine, under
the meaning of NI 43-101. Aspects of both mines relating to mining and
metallurgy are overseen by Charles Brown, Chief Operating Officer for Great
Panther and its Mexican subsidiary, Minera Mexicana
El Rosario, S.A. de C.V.
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