TIDMYAU 
 
Yamana Gold provides update on Gualcamayo and makes construction decision for 
QDD Lower West at Gualcamayo and Pilar 
 
 
 
- Increase in mineral reserves and mineral resources, increase in production at 
currently operating Gualcamayo mine and at new Pilar project - 
 
TORONTO, Aug. 4 /CNW/ - YAMANA GOLD INC. (TSX:YRI; NYSE:AUY; LSE:YAU) today 
announced that it has made a construction decision at QDD Lower West, the 
planned underground ore body at its Gualcamayo mine, which will supplement 
existing operations at Gualcamayo, and made a further construction decision for 
the development of its Pilar project in Brazil. The Company also reported 
updates on its other development and exploration projects. All amounts are 
expressed in United States Dollars unless otherwise indicated. 
 
"The supplemental production at Gualcamayo along with Pilar provides us with 
our next stage of growth into 2013, which will be beyond our initial production 
target of 1.5 million gold equivalent ounces," said Yamana's chairman and chief 
executive officer, Peter Marrone. "We have numerous other projects under 
evaluation in addition to expected continuing exploration successes, which we 
are confident will provide further production growth." 
 
Gualcamayo, Argentina 
 
    Advanced Mine Plan and Construction Decision at QDD Lower West 
 
    -------------------------------------------------------------- 
 
Yamana has updated its production plan for Gualcamayo to include the results of 
the recently completed feasibility study update for QDD Lower West, the planned 
underground ore body below the current QDD open pit operations and one of 
several identified areas of mineralization at Gualcamayo, and has made a 
construction decision for QDD Lower West. 
 
Capital required for QDD Lower West is estimated at approximately $85 million 
and is required primarily for mine development as ore is expected to be 
processed through existing heap leaching operations and facilities at 
Gualcamayo. This will be an underground mine, with ore being extracted through 
the sublevel stoping method. 
 
Gualcamayo production will result from a mix of various ores including from QDD 
and from QDD Lower West. Production from QDD Lower West is targeted to begin in 
early 2013, ahead of the originally planned 2015. Recovery at QDD Lower West is 
expected to be at approximately 65%, although recovery in the first couple of 
years would be higher. Cumulative recovery from all ores at Gualcamayo is 
expected to be in the order of approximately 65% to 75%. While recovery will be 
lower from QDD Lower West than the main open pit ore, gold will be recovered 
through the heap leaching processing facilities already in operation at 
Gualcamayo, thereby reducing the need for additional capital for production 
from QDD Lower West. In addition, ore from QDD Lower West increases the overall 
grade at Gualcamayo, thereby contributing to an increase in overall production. 
 
QDD Lower West's current mineral reserves and metallurgical testwork support 
heap leaching recovery at the planned recovery rate. Given the significant 
additional exploration opportunity at QDD Lower West, the Company will continue 
its exploration efforts as it progresses with mine development. The Company 
plans to monitor the option of adding a milling facility which would increase 
recoveries and production. The prospect of a mill is dependent on continuing 
exploration success and the delineation of additional mineral reserves and this 
initiative will be further evaluated in late 2011. 
 
The following is a summary of the updated and current mineral reserves and 
mineral resources at Gualcamayo: 
 
    ------------------------------------------------------------------------- 
 
                              Mineral Reserves(1) 
 
    ------------------------------------------------------------------------- 
 
         Proven  Mineral Reserve               Probable  Mineral Reserve 
 
    ------------------------------------------------------------------------- 
 
                     Au                                     Au 
 
         Tonnes    (g/t)       Oz (Au)          Tonnes    (g/t)       Oz (Au) 
 
    ------------------------------------------------------------------------- 
 
     17,091,074    0.95       522,934       58,575,156    1.04     1,957,370 
 
    ------------------------------------------------------------------------- 
 
 
 
    ---------------------------------- 
 
            Mineral Reserves(1) 
 
    ---------------------------------- 
 
         Total Proven & Probable 
 
    ---------------------------------- 
 
                     Au 
 
         Tonnes    (g/t)       Oz (Au) 
 
    ---------------------------------- 
 
     75,666,229    1.02     2,479,498 
 
    ---------------------------------- 
 
 
 
 
 
    ------------------------------------------------------------------------- 
 
            Mineral Resources(2)  (inclusive of mineral reserves) 
 
    ------------------------------------------------------------------------- 
 
        Measured Mineral Resource             Indicated Mineral Resource 
 
    ------------------------------------------------------------------------- 
 
                     Au                                     Au 
 
         Tonnes    (g/t)       Oz (Au)          Tonnes    (g/t)       Oz (Au) 
 
    ------------------------------------------------------------------------- 
 
     22,659,160    1.07       778,953       77,438,467    1.09     2,731,465 
 
    ------------------------------------------------------------------------- 
 
 
 
    ---------------------------------- 
 
          Mineral Resources(2) 
 
      (inclusive of mineral reserves) 
 
    ---------------------------------- 
 
        Total Measured & Indicated 
 
    ---------------------------------- 
 
                     Au 
 
         Tonnes    (g/t)       Oz (Au) 
 
    ---------------------------------- 
 
    100,097,627    1.09     3,510,418 
 
    ---------------------------------- 
 
 
 
 
 
    ---------------------------------- 
 
        Inferred Mineral Resources 
 
    ---------------------------------- 
 
                     Au 
 
         Tonnes    (g/t)       Oz (Au) 
 
    ---------------------------------- 
 
      5,428,130    1.06       184,110 
 
    ---------------------------------- 
 
 
 
    (1) Mineral reserves use a gold price of $900 per ounce 
 
    (2) Mineral resources are estimated at a cut-off grade of 1.0 g/t Au for 
 
        QDD Lower West, 0.15 g/t for QDD main open pit, and 0.5 g/t for AIM 
 
Total mineral reserve and mineral resource estimates at Gualcamayo have 
increased from those published as at the end of 2009. Proven and probable 
mineral reserves have increased by approximately six percent and with the 
upgrade of inferred resources, measured and indicated resources have increased 
by approximately 29 percent. 
 
The following is a summary of the key operating parameters at Gualcamayo 
beginning in 2011 accounting for a combination of the various ores. 
 
    Capital cost: approximately $85 million (QDD Lower West mine development) 
 
    Cash cost per ounce(1): $395-415 
 
    Mining cost per tonne of ore: $4.70-4.90 
 
    Plant cost per tonne or ore: $2.50-2.70 
 
    G&A and other cost per tonne:  $1.30-1.50 
 
    Average throughput: approximately 10,000,000 tonnes per year 
 
    Initial mine life: 9 years 
 
    Plant recovery rate: approximately 71% (cumulative) 
 
Planned sustainable production at Gualcamayo is targeted at more than 190,000 
ounces per year. The following is a summary of the updated expected annual 
production from Gualcamayo for the next five years. 
 
    ------------------------- 
 
    Year      Production (oz) 
 
    ------------------------- 
 
    2011         165-185,000 
 
    ------------------------- 
 
    2012         170-190,000 
 
    ------------------------- 
 
    2013         220-240,000 
 
    ------------------------- 
 
    2014         190-210,000 
 
    ------------------------- 
 
    2015         215-235,000 
 
    ------------------------- 
 
    Average      192-212,000 
 
    ------------------------- 
 
The Company views the increase in production at Gualcamayo from QDD Lower West 
as a base case scenario which may be improved upon with more ounces discovered 
and with the evaluation of the milling concept as noted above. 
 
Further exploration efforts continue at QDD Lower West. Yamana believes mineral 
reserves and mineral resources at Gualcamayo will continue to be increased 
significantly, particularly at QDD Lower West. During the first half of 2010, 
40 drill holes totaling 9,964 metres were completed from underground 
development at the west end of the QDD Lower West ore body. The drilling, 
designed to upgrade inferred mineral resources, resulted in an increase in the 
measured and indicated mineral resources category and confirmed that the QDD 
Lower West ore body remains open to the west. One kilometre further to the 
west, at the 3D target, the Rodado tunnel was completed to a length of 300 
metres and underground drilling commenced at the end of May 2010. The strike 
length of QDD Lower West has the potential to double to more than 2 kilometres. 
 
The Company will evaluate how additional mineral resources from this 
exploration plan will further contribute to gold production, particularly in 
later years with the objective of maintaining the sustainable production plan 
exceeding an average of 190,000 ounces per year through 2020. 
 
In the second quarter of 2010, production at Gualcamayo was 37,467 ounces 
representing an increase of over 8,000 ounces or 27 percent compared to the 
first quarter of 2010. Total gold production at Gualcamayo for the first half 
of 2010 was 66,928 ounces at cash cost of $434 per ounce. Production was 
entirely from the QDD open pit operations only. Yamana expects production at 
Gualcamayo to increase sequentially quarter-over-quarter similar to 2009 and 
that it will achieve planned levels of production for the remainder of the 
year. 
 
Pilar, Brazil 
 
    Construction Decision 
 
    --------------------- 
 
Yamana also announced today that it has made a construction decision on its 100 
percent owned Pilar project in Brazil. The decision was based on a recently 
completed positive feasibility study which delivered the first mineral reserve 
estimate for Pilar. 
 
The Pilar project is a gold project located in Goias, Brazil, approximately 300 
kilometres northwest of the city of Brasilia and approximately 70 kilometres 
south of Yamana's Chapada mine. Pilar is located east of the Crixas Greenstone 
Belt which hosts the Serra Grande gold mine and the Guarinos Greenstone Belt 
which is east of the Crixas Belt and similar in shape and size. The Crixas and 
Pilar gold mineralization have very similar structural control, hydrothermal 
alteration, stratigraphy and tectonic history, and are approximately 40 
kilometres apart. Yamana controls approximately 65,000 hectares of mineral 
claims and permits that cover the majority of the Guarinos and Pilar Greenstone 
belts. 
 
The Company has also provided an exploration update on its extension drilling 
program at Pilar and will continue its exploration efforts with the view of 
increasing overall mineral resources. During the permitting period, which is 
expected to continue into the first quarter of 2011, the Company will continue 
to advance exploration and development work to upgrade mineral resources to 
mineral reserves. The vein structure of the ore body varies in width. Hence, 
additional delineation work will allow for more reliability once production 
begins, which is targeted for mid-2013. Earth work is expected to begin in 
early to mid 2011 (after the rainy season and following the completion of 
permitting) and construction is expected to take 24-30 months. 
 
The following is a summary of the current mineral reserves and mineral 
resources for the Jordino deposit at Pilar based on drill results up until the 
end of April 2010: 
 
    ------------------------------------------------------------------------- 
 
                           Mineral Reserves(1, 2, 3) 
 
    ------------------------------------------------------------------------- 
 
          Proven  Mineral Reserve              Probable  Mineral Reserve 
 
    ------------------------------------------------------------------------- 
 
                     Au                                     Au 
 
         Tonnes    (g/t)       Oz (Au)          Tonnes    (g/t)       Oz (Au) 
 
    ------------------------------------------------------------------------- 
 
              -       -             -        8,871,089    4.01     1,144,894 
 
    ------------------------------------------------------------------------- 
 
 
 
    ---------------------------------- 
 
         Mineral Reserves(1, 2, 3) 
 
    ---------------------------------- 
 
          Total Proven & Probable 
 
    ---------------------------------- 
 
                     Au 
 
         Tonnes    (g/t)       Oz (Au) 
 
    ---------------------------------- 
 
      8,871,089    4.01     1,144,894 
 
    ---------------------------------- 
 
 
 
 
 
    ------------------------------------------------------------------------- 
 
              Mineral Resources(2) (inclusive of mineral reserves) 
 
    ------------------------------------------------------------------------- 
 
        Measured Mineral Resource              Indicated Mineral Resource 
 
    ------------------------------------------------------------------------- 
 
                     Au                                     Au 
 
         Tonnes    (g/t)       Oz (Au)          Tonnes    (g/t)       Oz (Au) 
 
    ------------------------------------------------------------------------- 
 
              -       -             -        7,658,576     4.94    1,215,846 
 
    ------------------------------------------------------------------------- 
 
 
 
    ---------------------------------- 
 
           Mineral Resources(2) 
 
      (inclusive of mineral reserves) 
 
    ---------------------------------- 
 
        Total Measured & Indicated 
 
    ---------------------------------- 
 
                     Au 
 
         Tonnes    (g/t)       Oz (Au) 
 
    ---------------------------------- 
 
      7,658,576    4.94     1,215,846 
 
    ---------------------------------- 
 
 
 
 
 
    ---------------------------------- 
 
        Inferred Mineral Resources 
 
    ---------------------------------- 
 
                     Au 
 
         Tonnes    (g/t)       Oz (Au) 
 
    ---------------------------------- 
 
        207,650    5.27        35,155 
 
    ---------------------------------- 
 
 
 
    (1) Mineral reserves use a gold price of $900 per ounce 
 
    (2) Mineral reserves and mineral resources are estimated at a 2.0 g/t Au 
 
        cut-off grade. 
 
    (3) Mineral reserves include dilution of 1.83 million tonnes of waste 
 
        grading 0.41 g/t Au. 
 
Total mineral resources (including reserves) for the Jordino deposit increased 
by 32 percent from the published estimate for mineral resources as at the end 
of 2009. The new mineral reserves at Pilar increase the Company's total proven 
and probable mineral reserves by seven percent to 18.7 million ounces of gold. 
Pilar, based on production, mineral reserves and resources, and anticipated 
further exploration success, now represents one of the more significant 
projects for Yamana. 
 
Key parameters of the Pilar feasibility study include: 
 
    Capital cost: approximately $180 million 
 
    Cash cost per ounce(1): $430-460 
 
    Mining cost per tonne of ore: $34-36 
 
    Plant cost per tonne of ore: $12-14 
 
    G&A and other cost per tonne of ore: $6-8 
 
    Average throughput: approximately 1,000,000 tonnes per year 
 
    Average annual production: approximately 120,000 ounces of gold 
 
    Initial mine life: 9 years 
 
    Plant recovery rate: 95% 
 
The after-tax internal rate of return (IRR) exceeds the planned corporate 
objective of at least 20 percent. 
 
Pilar is planned as an underground mine with ore being extracted through the 
room and pillar method with a conventional milling, gravity and carbon in pulp 
processing plant. 
 
    Further Exploration 
 
    ------------------- 
 
Drilling during the first half of 2010 has focused on extending the main 
Jordino mineralization down dip. 18,000 metres of diamond drilling has been 
completed to date this year (See Figure 1) and the Company continues to report 
positive results, mainly in the north portion of the Jordino trend, where a 700 
metre down dip extension of mineralization has been confirmed with significant 
gold grades along a strike length of 400 metres (See Figure 2). This down dip 
extension is currently double the dip length of the current mineral resource 
implying significant exploration upside and mineral resource growth. 
 
             --------------------------------------------------- 
 
              Hole No.   From (m)   To (m)    Length   Au (g/t) 
 
             --------------------------------------------------- 
 
               JD_311     350.33   351.43        1.1      2.02 
 
             --------------------------------------------------- 
 
               JD_313     330.00   331.00          1      18.1 
 
             --------------------------------------------------- 
 
               JD_313     403.93   404.43        0.5      3.16 
 
             --------------------------------------------------- 
 
               JD_314     313.40   314.07       0.67      2.27 
 
             --------------------------------------------------- 
 
               JD_314     315.08   316.00       0.92      1.55 
 
             --------------------------------------------------- 
 
               JD_314     333.00   334.00          1      4.28 
 
             --------------------------------------------------- 
 
               JD_314     365.93   366.00       0.57      1.67 
 
             --------------------------------------------------- 
 
               JD_315     253.00   253.50        0.5      4.69 
 
             --------------------------------------------------- 
 
               JD_315     418.51   420.31        1.8      1.33 
 
             --------------------------------------------------- 
 
               JD_317     396.00   397.00          1      2.54 
 
             --------------------------------------------------- 
 
               JD_317     460.99   461.48       0.49      17.8 
 
             --------------------------------------------------- 
 
               JD_317     465.00   466.00          1       4.3 
 
             --------------------------------------------------- 
 
               JD_318     264.00   265.09       1.09       2.5 
 
             --------------------------------------------------- 
 
               JD_318     284.40   284.90        0.5      55.4 
 
             --------------------------------------------------- 
 
               JD_318     289.48   289.97       0.49      6.05 
 
             --------------------------------------------------- 
 
               JD_319     211.00   211.51       0.51      14.2 
 
             --------------------------------------------------- 
 
               JD_320     219.13   219.65       0.52      3.64 
 
             --------------------------------------------------- 
 
               JD_320     352.54   353.04        0.5      3.08 
 
             --------------------------------------------------- 
 
               JD_321     391.50   392.00        0.5      8.96 
 
             --------------------------------------------------- 
 
               JD_321     414.50   415.50          1      3.33 
 
             --------------------------------------------------- 
 
               JD_321     420.50   421.00        0.5       6.1 
 
             --------------------------------------------------- 
 
               JD_322     382.00   384.00          2       2.7 
 
             --------------------------------------------------- 
 
               JD_322     464.50   466.19       1.69      1.94 
 
             --------------------------------------------------- 
 
               JD_323     408.00   409.00          1      2.29 
 
             --------------------------------------------------- 
 
               JD_323     382.00   383.00          1      1.67 
 
             --------------------------------------------------- 
 
               JD_328     280.07   281.06       0.99      4.54 
 
             --------------------------------------------------- 
 
               JD_330     243.29   245.00       1.71      2.74 
 
             --------------------------------------------------- 
 
               JD_325     427.00   427.50        0.5       5.1 
 
             --------------------------------------------------- 
 
               JD_325     430.00   430.50        0.5      4.54 
 
             --------------------------------------------------- 
 
               JD_326     540.00   540.50        0.5      4.88 
 
             --------------------------------------------------- 
 
               JD-328     280.07   281.06       0.99      4.54 
 
             --------------------------------------------------- 
 
               JD-329     203.00   203.86       0.86      9.06 
 
             --------------------------------------------------- 
 
               JD_332     303.00   304.00          1      11.5 
 
             --------------------------------------------------- 
 
               JD_334     366.50   367.10        0.6      44.3 
 
             --------------------------------------------------- 
 
               JD_334     375.68   376.18        0.5      5.14 
 
             --------------------------------------------------- 
 
               JD_334     395.70   397.00        1.3      13.5 
 
             --------------------------------------------------- 
 
An additional 15,000 metres of drilling will be completed on the Jordino 
deposit to extend the deposit down dip along its entire strike length of more 
than 1,200 metres. Based on drilling results, the mineral resource has the 
potential to significantly increase from its currently estimated size. An 
updated mineral resource estimate is expected be completed by the year end of 
2010. 
 
Further Development Update 
 
Mercedes, Mexico 
 
The Mercedes Project (See Figure 3) continues to advance with production 
expected to begin in 2012. During the development period, the Company has 
undertaken a significant exploration program given the strong upside growth 
potential, as highlighted by an over 50% year-over-year increase in cumulative 
total mineral resources from 2008 to 2009. The Company anticipates a similar 
increase in 2010. 
 
Mercedes is planned as an initial 120,000 GEO per year mine for a period of ten 
years. The Company will further evaluate the potential to increase annual 
production as it advances its exploration program. 
 
Drilling in 2010 to date has been very encouraging. Most notably, Yamana has: 
 
        1) Expanded the mineral resource and identified new epithermal veins 
 
           within a 1080-metre strike length of the Barrancas structural 
 
           corridor, including hole M10-490D, with a drill intercept of 27.46 
 
           metres (15.10 metres estimate TW) at 10.51 g/t Au and 94.3 g/t 
 
           Ag, and 
 
        2) Intersected a significant new mineralized zone, named Diluvio, 
 
           within the Lupita Vein structure, including the discovery hole 
 
           L10-073D with a drill intercept of 31.44 metres (16.03 metres 
 
           estimate TW) at 8.40 g/t Au and 11.9 g/t Ag. 
 
 
 
    Las Barrancas 
 
    ------------- 
 
Drilling in 2010 has been focused primarily in the Barrancas zone, centered 2.0 
km northwest of the Mercedes Mill site. High grade mineralization was first 
intersected in the Barrancas Vein Zone in June 2009. It is the first blind vein 
to be discovered in the Mercedes Project area, and provides other large 
prospective areas for exploration. Subsequent drilling since June 2009 has 
identified ore grade mineralization in several zones along 900 metres of strike 
length, with an initial inferred mineral resource estimate of 205,000 gold 
equivalent ounces at a grade of 6.05 g/t AuEq. 
 
2010 Drilling has focused on both 1) 60-metre step-out drilling to define 
limits of mineralization outside the 2009 mineral resource grade shells; and 2) 
30-metre infill drilling on a 300-metre strike length covering the Barrancas 
Hondo ore zone. A total of 10,098 metres in 37 holes have been completed, with 
three core rigs currently on-site. 
 
Results have been encouraging as both of the principal ore shoots (Hondo and 
Lagunas) were extended beyond limits defined in 2009. The Barrancas Zone has 
been extended to a strike length of 1080 metres and is open to the northwest, 
as shown by hole M10-501D (1.5 metres grading 15.92 g/t Au and 38.0 g/t Ag). 
In-fill drilling in the Hondo zone has also intersected the widest ore zones 
yet identified in Barrancas, locally to +15.0 metres in true width (including 
hole M10-490, with 15.10 metres true width at 10.51 g/t Au and 94.3 g. /t Ag). 
 
Highlights from the 2010 drilling include the following intercepts (at a 2.0 g/ 
t AuEq cutoff) (See Figure 4): 
 
    ------------------------------------------------------------------------ 
 
                                                   True 
 
     Hole   Section        From    To   Interval  Width   Au    Ag     AuEq 
 
                           (m)     (m)     (m)     (m)    g/t   g/t    g/t 
 
    ------------------------------------------------------------------------ 
 
    M10-487  11,020       289.56  298.70   9.14   7.19   6.71   48.7   7.03 
 
    ------------------------------------------------------------------------ 
 
    M10-488  10,900       183.90  187.34   3.44   1.15  19.93   93.1  20.55 
 
    ------------------------------------------------------------------------ 
 
    M10-490  11,080       171.45  184.88  13.43   8.20   8.68  100.5   9.35 
 
    M10-490  11,080  and  220.70  225.55   4.85   4.45  11.83  119.8  12.63 
 
    ------------------------------------------------------------------------ 
 
    M10-492  11,440       162.14  165.66   3.52   3.00   4.67   44.9   4.97 
 
    M10-492  11,440  and  179.83  182.27   2.44   2.08   3.78   63.2   4.20 
 
    ------------------------------------------------------------------------ 
 
    M10-493  11,140       208.00  235.46  27.46  15.10  10.51   94.3  11.14 
 
    ------------------------------------------------------------------------ 
 
    M10-496  11,680       237.74  244.45   6.71   5.17   3.47   25.1   3.64 
 
    ------------------------------------------------------------------------ 
 
    M10-497  11,320       145.00  148.33   3.33   1.50   4.63   73.9   5.12 
 
    M10-497  11,320  and  201.90  204.76   2.86   1.64   3.35   81.5   3.89 
 
    ------------------------------------------------------------------------ 
 
    M10-500  11,920       212.45  215.80   3.35   2.45   5.84  228.2   7.36 
 
    M10-500  11,920  and  238.00  241.71   3.71   2.60   2.70   39.1   2.96 
 
    M10-500  11,920  and  242.93  251.16   8.23   5.76   2.28   37.1   2.53 
 
    ------------------------------------------------------------------------ 
 
    M10-501  11,980       205.15  206.65   1.50   1.01  15.92   38.0  16.17 
 
    ------------------------------------------------------------------------ 
 
    M10-503  11,680       271.27  273.94   2.67   2.00   6.10   37.5   6.35 
 
    ------------------------------------------------------------------------ 
 
    M10-505  11,140       165.00  170.99   4.49   3.59   6.02   44.1   6.31 
 
    ------------------------------------------------------------------------ 
 
    M10-506  11,080       206.65  210.70   4.05   3.25   3.73   79.6   4.26 
 
    ------------------------------------------------------------------------ 
 
    M10-509  11,080       216.89  248.41  31.52  19.90   5.51   80.5   6.05 
 
    ------------------------------------------------------------------------ 
 
    M10-511  11,140       199.64  206.10   6.46   3.90  17.07  118.3  17.86 
 
    ------------------------------------------------------------------------ 
 
    M10-512  11,020       149.45  154.36   4.91   3.20   4.88   28.4   5.07 
 
    M10-512  11,020  and  203.61  205.13   1.52   1.00   5.44   40.2   5.71 
 
    M10-512  11,020  and  269.14  272.19   3.05   2.45  10.37   95.1  11.00 
 
    ------------------------------------------------------------------------ 
 
A 20,000 metre drill budget has been approved to accelerate 30-metre infill 
drilling at Barrancas for mineral reserve definition. Four core rigs will be 
on-site in August 2010 to continue with the program. 
 
    Lupita 
 
    ------ 
 
Drilling in 2010 at Lupita has focused on testing extensions of the 75,000 gold 
equivalent ounce mineral resource area outlined in 2009, as well as exploratory 
drilling further east in the vein zone. A total of 7,019 metres in 27 core 
holes have been drilled year-to-date. Lupita is located three kilometres 
northwest of the Mercedes vein. 
 
Drilling has closed off the 2009 mineral resource zone, with one small 
extension area noted on the east side (L10-50D, with 3.66 metres at 33.69 g/t 
Au and 50.2 g/t Ag.) More importantly, exploratory drilling has intersected a 
significant new zone of mineralization, named Diluvio, approximately 600 metres 
NE of the resource zone. A total of 13 wide-spaced holes (in a surface area of 
450 x 200 metres) have intersected a broad zone of multi-stage low sulfidation 
carbonate-quartz-adularia veins and stockworks ranging from 10.0 to 150.0 
metres in true width. The vein zone flairs dramatically in width at depths of 
200-300 metres; down dip from surface vein outcrops ranging from 1.0 to 4.0 
metres in width. The veining appears to be localized along a series of moderate 
to low angle structures both at the lower andesite contact and extending into 
the underlying quartz lithic tuff. The zones are also cut by local high angle 
epithermal veins. 
 
Broad intervals of mineralization averaging 1.5 to 2.0 g/t AuEq (at a 0.5 g/t 
AuEq cutoff) are present in the main block; including an interval of 91.0 
metres true width at 1.32 g/t Au and 21.4 g/t Ag in hole L10-69D. Higher grade 
intervals are restricted in width but are present in most holes. However, two 
outlying holes 120 metres to the north of the block intersected higher gold 
grades, suggesting that there may be significant high-grade potential within 
the system amenable to underground mining: 
 
    - L10-073D 
 
     (120 metres to North):     31.44 metres at 8.40 g/t Au and 11.9 g/t Ag 
 
 
 
    - L10-67D 
 
     (120 metres to NW):       0.55 metres at 22.60 g/t Au and 268.0 g/t Ag 
 
            And                  4.30 metres at 7.10 g/t Au and 35.7 g/t Ag 
 
Highlights from the 2010 drilling include the following intercepts (at a 0.5 g/ 
t and 2.0 g/t AuEq cutoff) (See Figure 5): 
 
    ------------------------------------------------------------------------- 
 
                       Cutoff                            True 
 
    Hole   Section      (g/t    From      To   Interval  Width   Au     Ag 
 
                        AuEq)    (m)      (m)    (m)      (m)   g/t    g/t 
 
    ------------------------------------------------------------------------- 
 
    L10-050  5240        2.0   214.27   217.93    3.66    3.21  33.69   50.2 
 
    ------------------------------------------------------------------------- 
 
    L10-061  5540        0.5   259.93   310.90   50.97   49.30   1.39   26.9 
 
    L10-061  5540  with  2.0   291.08   304.08   13.72   13.22   3.05   36.6 
 
    ------------------------------------------------------------------------- 
 
    L10-064  5600  and   0.5   240.84   270.66   29.82   24.45   0.80   90.5 
 
    L10-064  5600  and   2.0   266.09   268.36    2.28    1.87   4.85   32.5 
 
    ------------------------------------------------------------------------- 
 
    L10-066  5540        0.5   298.70   347.33   48.63   46.00   1.26   25.8 
 
    L10-066  5540  with  2.0   298.70   299.76    1.06    1.01   0.12  522.0 
 
    L10-066  5540  and   2.0   314.21   316.87    2.66    2.53   3.53   13.5 
 
    L10-066  5540  and   2.0   327.06   330.71    3.65    3.47   2.22    6.5 
 
    L10-066  5540  and   2.0   333.76   336.86    3.10    2.95   4.05    7.5 
 
    ------------------------------------------------------------------------- 
 
    L10-067  5540        2.0   258.52   259.08    0.56    0.53   5.02   41.1 
 
    L10-067  5540  and   2.0   286.19   286.78    0.59    0.55  22.60  268.0 
 
    L10-067  5540        0.5   298.20   321.56   23.36   21.96   1.83   19.7 
 
    L10-067  5540  with  2.0   307.85   312.42    4.57    4.30   7.10   35.7 
 
    ------------------------------------------------------------------------- 
 
    L10-068  5600        0.5   253.97   271.27   17.30   14.90   0.88   19.8 
 
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    L10-069  5600        0.5   228.60   329.18  100.58   91.00   1.32   21.4 
 
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    L10-069  5600  with  2.0   246.89   249.94    3.05    2.75   2.92    6.6 
 
    L10-069  5600  and   2.0   251.46   266.70   15.24   13.72   2.98    9.2 
 
    L10-069  5600  and   2.0   268.22   270.29    2.07    1.86   3.36   24.0 
 
    L10-069  5600  and   2.0   284.42   286.51    2.09    1.88   3.08   78.9 
 
    L10-069  5600  and   2.0   309.37   312.62    3.25    2.93   4.26   61.7 
 
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    L10-071  5660        0.5   233.18   261.17   27.99   25.00   2.16   29.1 
 
    L10-071  5660  with  2.0   243.84   246.89    3.05    2.71   8.24   25.7 
 
    L10-071  5660  and   2.0   249.94   251.26    1.32    1.17   3.22    7.7 
 
    L10-071  5660  and   2.0   253.72   260.02    6.48    5.77   2.58   40.2 
 
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    L10-072  5600        0.5   234.39   280.11   45.72   41.00   1.97   19.6 
 
    L10-072  5600  with  2.0   240.49   246.08    5.59    4.90   3.72   12.9 
 
    L10-072  5600  and   2.0   264.87   270.97    6.10    5.35   3.94   14.0 
 
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    L10-073  5720        0.5   202.08   259.99   57.91   29.53   5.47    9.8 
 
    L10-073  5720  with  2.0   202.08   233.52   31.44   16.03   8.40   11.9 
 
    L10-073  5720  and   2.0   241.25   243.23    1.98    1.01  14.65   21.7 
 
    L10-073  5720        2.0   320.95   324.00    3.05    1.56   7.96   12.8 
 
    L10-073  5720        0.5   339.24   350.72   11.48    5.85   1.43   12.4 
 
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    L10-074  5720        0.5   232.30   253.89   21.59   11.01   0.66   32.5 
 
    L10-074  5720  with  2.0   249.33   250.85    1.52    0.78   2.12   58.7 
 
    L10-074  5720        0.5   263.48   273.71   10.23    5.22   0.89   85.4 
 
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    L10-075  5840        0.5   368.51   381.95   13.44   11.10   2.07   17.7 
 
    L10-075  5840  with  2.0   371.70   377.85   6.15     5.07   3.47   20.3 
 
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Drilling to date has only tested approximately 55% of the exposed strike length 
of the 1500-metre long Lupita Vein Zone. The Diluvio zone is completely open to 
the north down-dip and to the east on strike. Additional wide-spaced 
exploratory drilling will be conducted after the end of the monsoon season, to 
define limits of mineralization and test for continuity of higher-grade zones. 
A minimum of 7,000 metres of core drilling is currently budgeted to continue 
exploration in this very prospective new target area. 
 
Further mine exploration and development update 
 
El Penon, Fazenda Brasileiro and Jacobina 
 
The Company continues with significant exploration efforts at all its mines 
with a particular focus on El Penon, Fazenda Brasileiro and Jacobina, and 
intends to provide a further exploration update for these mines by the end of 
2010. 
 
Chapada, Brazil 
 
Yamana is currently advancing a feasibility-level study for Suruca, the new 
gold mineralized area at Chapada, which the Company expects to complete by the 
end of 2010. A total of 15,500 metres of extension and infill diamond drilling 
was completed in 2010 and the results have extended Suruca from 500 metres 
along strike to 1,100 metres along strike and showed that the mineralization 
remains open to northeast. An 800 metre section of the northeast part of the 
deposit has been drilled on 100 metre spacing. The Company believes Suruca will 
provide substantial gold only production growth at this already robust and long 
life mine. The Company contemplates a shallow open pit operation with ore 
hauled to the Chapada plant for processing. 
 
Jeronimo, Chile 
 
Yamana holds a 57% controlling and operating interest in the Jeronimo project, 
which is located in Region II of northern Chile. Yamana continues to advance 
Jeronimo having made significant advancements in metallurgical testwork and 
intends to deliver a feasibility study in late 2011. 
 
Quality Assurance and Quality Control 
 
Yamana incorporates a rigorous Quality Assurance and Quality Control program 
for all of its mines and exploration projects which conforms to industry Best 
Practices as outlined by the CSE and National Instrument 43-101. This includes 
the use of independent third party laboratories and the use of professionally 
prepared standards and blanks and analysis of sample duplicates with a second 
independent laboratory. 
 
Qualified Person 
 
Evandro Cintra, P.Geo., Senior Vice President, Technical Services of Yamana 
Gold Inc. has reviewed and confirmed the scientific and technical information 
contained within this news release in relation to Gualcamayo and Pilar and 
serves as the Qualified Person as defined in National Instrument 43-101. 
 
Sergio Brandao Silva, P.Geo., Brazil Exploration Director of Yamana Gold Inc. 
has reviewed and confirmed the drilling and exploration information contained 
within this news release in relation to Pilar and serves as the Qualified 
Person as defined in National Instrument 43-101. 
 
Mark Hawksworth, P. Geo, Mercedes Project Exploration Manager for Yamana Gold 
Inc. has reviewed and confirmed the scientific and technical information 
contained within this news release in relation to Mercedes and serves as the 
Qualified Person as defined in National Instrument 43-101. 
 
About Yamana 
 
Yamana is a Canadian-based gold producer with significant gold production, gold 
development stage properties, exploration properties, and land positions in 
Brazil, Argentina, Chile, Mexico and Colombia. Yamana plans to continue to 
build on this base through existing operating mine expansions, throughput 
increases, development of new mines, the advancement of its exploration 
properties and by targeting other gold consolidation opportunities with a 
primary focus in the Americas. 
 
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS: This news release 
contains or incorporates by reference "forward-looking statements" within the 
meaning of the United States Private Securities Litigation Reform Act of 1995 
and applicable Canadian securities legislation. Except for statements of 
historical fact relating to the Company, information contained herein 
constitutes forward-looking statements, including any information as to the 
Company's strategy, plans or future financial or operating performance. 
Forward-looking statements are characterized by words such as "plan," "expect", 
"budget", "target", "project", "intend," "believe", "anticipate", "estimate" 
and other similar words, or statements that certain events or conditions "may" 
or "will" occur. Forward-looking statements are based on the opinions, 
assumptions and estimates of management considered reasonable at the date the 
statements are made, and are inherently subject to a variety of risks and 
uncertainties and other known and unknown factors that could cause actual 
events or results to differ materially from those projected in the 
forward-looking statements. These factors include the Company's expectations in 
connection with the projects and exploration programs discussed herein being 
met, the impact of general business and economic conditions, global liquidity 
and credit availability on the timing of cash flows and the values of assets 
and liabilities based on projected future conditions, fluctuating metal prices 
(such as gold, copper, silver and zinc), currency exchange rates (such as the 
Brazilian Real, the Chilean Peso and the Argentine Peso versus the United 
States Dollar), possible variations in ore grade or recovery rates, changes in 
the Company's hedging program, changes in accounting policies, changes in the 
Company's corporate resources, risk related to non-core mine dispositions, 
changes in project parameters as plans continue to be refined, changes in 
project development, construction, production and commissioning time frames, 
risk related to joint venture operations, the possibility of project cost 
overruns or unanticipated costs and expenses, higher prices for fuel, steel, 
power, labour and other consumables contributing to higher costs and general 
risks of the mining industry, failure of plant, equipment or processes to 
operate as anticipated, unexpected changes in mine life, final pricing for 
concentrate sales, unanticipated results of future studies, seasonality and 
unanticipated weather changes, costs and timing of the development of new 
deposits, success of exploration activities, permitting time lines, government 
regulation of mining operations, environmental risks, unanticipated reclamation 
expenses, title disputes or claims, limitations on insurance coverage and 
timing and possible outcome of pending litigation and labour disputes, as well 
as those risk factors discussed or referred to in the Company's annual 
Management's Discussion and Analysis and Annual Information Form for the year 
ended December 31, 2009 filed with the securities regulatory authorities in all 
provinces of Canada and available at www.sedar.com, and the Company's Annual 
Report on Form 40-F filed with the United States Securities and Exchange 
Commission. Although the Company has attempted to identify important factors 
that could cause actual actions, events or results to differ materially from 
those described in forward-looking statements, there may be other factors that 
cause actions, events or results not to be anticipated, estimated or intended. 
There can be no assurance that forward-looking statements will prove to be 
accurate, as actual results and future events could differ materially from 
those anticipated in such statements. The Company undertakes no obligation to 
update forward-looking statements if circumstances or management's estimates, 
assumptions or opinions should change, except as required by applicable law. 
The reader is cautioned not to place undue reliance on forward-looking 
statements. The forward-looking information contained herein is presented for 
the purpose of assisting investors in understanding the Company's expected 
exploration, development and operational plans and may not be appropriate for 
other purposes. 
 
NON-GAAP MEASURES 
 
The Company has included certain non-GAAP measures including "Co-product cash 
costs per gold equivalent ounce". The Company believes that these measures, 
together with measures determined in accordance with Canadian GAAP, provide 
investors with an improved ability to evaluate the underlying performance of 
the Company. Non-GAAP measures do not have any standardized meaning prescribed 
under Canadian GAAP, and therefore they may not be comparable to similar 
measures employed by other companies. The data is intended to provide 
additional information and should not be considered in isolation or as a 
substitute for measures of performance prepared in accordance with Canadian 
GAAP 
 
CO-PRODUCT CASH COSTS 
 
The Company has included cash costs per GEO information because it understands 
that certain investors use this information to determine the Company's ability 
to generate earnings and cash flows for use in investing and other activities. 
The Company believes that conventional measures of performance prepared in 
accordance with Canadian GAAP do not fully illustrate the ability of its 
operating mines to generate cash flows. The measures are not necessarily 
indicative of operating profit or cash flows from operations as determined 
under Canadian GAAP. Cash costs per GEO are determined in accordance with the 
Gold Institute's Production Cost Standard and are calculated on a co-product 
basis. Cash costs on a co-product basis are computed by allocating operating 
cash costs separately to metals (gold and copper) based on an estimated or 
assumed ratio. 
 
To see the maps attached to this press release, please go to: http:// 
files.newswire.ca/797/YRIMaps.pdf 
 
    ---------------------------------------------- 
 
    (1) Cash costs per GEO is a non-GAAP measure. A definition is provided at 
 
        the end of this press release. 
 
 
 
For further information: For further information: Letitia Wong, Director, 
Investor Relations, (416) 815-0220, Email: investor(at)yamana.com, 
www.yamana.com; MEDIA INQUIRIES: Mansfield Communications Inc., Hugh Mansfield, 
(416) 599-0024 
(YRI. AUY YAU) 
 
 
 
 
 
END 
 

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