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The San Jose silver-gold mine is located in Argentina, in the Santa Cruz province, 1,750 kilometres south-southwest of Buenos Aires. The property covers a total area of 50,491 hectares and consists of 46 contiguous mining concessions totalling 40,499 hectares and an exploration permit covering almost 10,000 hectares. The San Jose property is located approximately 20 kilometres north of Goldcorp’s Cerro Negro project.
Title to the San Jose property is held by Minera Santa Cruz, S.A. ("MSC"), the holding and operating company set up under the terms of an option and Joint Venture Agreement between McEwen Mining Inc. (49%) and Hochschild Mining Argentina (51%), a wholly-owned subsidiary of Hochschild.
The mineralisation at the San Jose property represents a low sulphidation type with quartz sulphide veins with economic silver and gold values and has geological and mineralogical characteristics similar to those of the Company’s Peruvian operations. San Jose commenced operations in June 2007 and the deposit is mined using the cut and fill method. The plant at San Jose has a capacity of 1,500 tonnes per day.
In 2020 silver equivalent production at San Jose was 9,697 koz comprised of 6,846 koz of silver and 4,108 koz of gold production.
2012
2011
2010
2009
Ore production (tonnes)
509,851
462,825
461,134
460,971
417
444
397
398
Average gold grade (g/t)
5.79
5.86
6.14
6.19
Silver produced (koz)
5,953
5,870
5,324
4,998
Gold produced (koz)
85.77
80.95
84.30
77.08
11,099
10,727
10,382
9,623
Silver sold (koz)
5,897
6,087
5,284
5,072
Gold sold (koz)
84.3
82.4
85.0
77.22
Resources (attrib. Moz Ag Eq)
96.8
87.8
80.0
56.1
12.2
11.4
8.4
Capacity
1,650
1,500
At San Jose, 2,889m of potential drilling was executed before the stoppage in the first quarter in the Micaela Oeste, Emily, Karina and Carlos structures. When exploration restarted in the second quarter, further potential drilling was carried out throughout the remainder of the year towards the Ayelen, Erika, Mara, Sigmoide Julia, Sigmoide Luli, Emilia, Salvador, Micaela Oeste, Cindy and Saavedra targets. Resource drilling was also executed in the Betania and Isabel structures. A total of close to 45,000m of drilling was carried out in 2020 whilst, in the second quarter of the year, a Titan geophysics survey was completed.
Vein
Results (potential drilling)
Micaela Oeste
SJD-2070: 0.9m @ 9.6g/t Au & 207g/t Ag
Carlos
SJD-2084: 1.9m @ 3.5g/t Au & 1,024g/t Ag
Odin
SJD-2103: 2.8m @ 17.1g/t Au & 591g/t Ag
SJD-2109: 0.9m @ 6.9g/t Au & 126g/t Ag
SJM-505: 2.6m @ 11.0g/t Au & 968g/t Ag
Julia
SJD-2108: 1.0m @ 7.0g/t Au & 812g/t Ag
SJD-2110: 1.2m @ 5.8g/t Au & 197g/t Ag
Erika
SJD-2114: 0.8m @ 1.5g/t Au & 332g/t Ag
New vein 1
SJD-2110: 0.9m @ 8.0g/t Au & 398g/t Ag
Isabel
SJD-2145: 0.8m @ 1.7g/t Au & 449g/t Ag
SJD-2210: 1.6m @ 5.6g/t Au & 648g/t Ag
SJD-2211: 1.6m @ 3.7g/t Au & 376g/t Ag
Horiz.Savedra
SJD-2154: 2.4m @ 4.9g/t Au & 19g/t Ag
Emilia
SJM-511: 0.9m @ 1.8g/t Au & 248g/t Ag
Cindy
SJM-518: 1.2m @ 3.8g/t Au & 407g/t Ag
HVS
SJD-2140: 3.4m @ 10.0g/t Au & 523g/t Ag
Kospi
SJD-2129: 1.4m @ 6.2g/t Au & 1,309g/t Ag
Sig. Luli
SJM-507: 1.1m @ 14.9g/t Au & 295g/t Ag
SJM-508: 1.5m @ 2.4g/t Au & 248g/t Ag
Alina
SJD-2176: 1.2m @ 1.1g/t Au & 319g/t Ag
Ramal HVNX
SJD-2184: 1.2m @ 4.0g/t Au & 557g/t Ag
SJD-2188: 1.3m @ 13.8g/t Au & 3,149g/t Ag
Betania (Saavedra)
SJD-2207: 4.0m @ 1.4g/t Au & 760g/t Ag
Luisa
SJD-2210: 0.9m @ 2.2/t Au & 722g/t Ag
During the first quarter of 2021, 2,000m of resource drilling is planned at the Betania and Isabel veins with campaigns also continuing at the Saavedra area, the Telken zone close to Cerro Negro and at Aguas Vivas to the north west of San Jose.
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