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Pan American Silver Corp.

Gold River Trend Property (Exploration)

Dec 27, 2013
The Gold River Property was acquired through the business combination agreement with West Timmins Mining Inc. in November 2009. The property is located about 3 kilometres south of Timmins West Mine and consists of 125 exploration covering approximately 4,864 hectares. On February 22, 2012 Lake Shore Gold announced an updated National Instrument 43-101 resource that nearly tripled total ounces and doubled the grade from the previous estimate to 117,400 ounces (690,000 tonnes @ 5.29 gpt) in the Indicated category and 1,027,800 ounces (5,273,000 tonnes @ 6.06 gpt) in the Inferred category.


 
The Gold River Trend covers an area of approximately 5 kilometres, including an east-west trending deformation and alteration zone traced for over 2.5 kilometres. The Gold River Trend varies from 50 to 200 metres in width and is dominated by strongly sheared and hydrothermally altered sedimentary and volcanic rocks which have been intruded by lenses of porphyry.


Resources(1)



Drilling to date at Gold River has been mainly focused within 400 metres from surface. Based on limited drilling below that level, a high-grade was discovered in the East Deposit containing 310,900 ounces at an average grade of 9.81 gpt. Drilling in early 2012 successfully extended the mineralization in the high-grade core to depth and to the west. Given the limited drilling on the property, particularly to depth, and the fact that the high-grade core in the East Deposit is open and has already been extended, the exploration potential of the Gold River Trend property is considered excellent.


(1) Key information related to resource calculation includes:
• CIM definitions were followed for classification of Mineral Resources.
• Mineral Resources are estimated at a cut-off grade of 2.0 g /t Au.
• Mineral Resources are estimated using an average long-term gold price of US$1,200 per ounce and a US$/C$ exchange rate of 0.93.
• A minimum mining width of two metres was used.
• Capped gold grades are used in estimating the Mineral Resource average grade.
• Sums may not add due to rounding.
• There are no Mineral Reserves estimated for the Gold River Trend.
• Metallurgical recoveries are assumed to average 85%.
• Mining costs are assumed to average $90.00/tonne.

(2) Grams per tonne.

 
Exploration Potential
 
The exploration potential of the Gold River Trend is considered excellent. The Gold River Trend is an east-west trending mineralized deformation and alteration zone, traced for over 3 kilometres, located on the south side of the Timmins West sedimentary basin. The Gold River Trend is interpreted as a branch fault from the Destor Porcupine Fault with broad similarities to the Dome Fault, a major ore control of the historic Dome Mine.
 
The Gold River Trend varies from 50 to 200 metres in width and is dominated by strongly sheared and hydrothermally altered sedimentary and volcanic rocks which have been intruded by lenses of porphyry. Work to date indicates that at least 15 different zones of gold mineralization exist with potential for being defined as narrow high grade or wide bulk resources. In most cases the mineralization is closely associated with pyrite-arsenopyrite-ankerite-quartz veins.
 
Past drilling on the Gold River Trend has largely been focused on shallow targets, with only limited drilling have been done below 300 metres, leaving open the possibility for outlining both near surface and underground resources extending to depth.

Technical report  

Source: http://www.lsgold.com/Mines-Projects-Properties/Review-of-Properties/Timmins-West-complex/Gold-River-Trend-Property-Exploration/default.aspx

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