BolaƱitos Mine, Mexico

BolaƱitos Highlights

Overview

Acquisition Endeavour's second mine, acquired in May 2007
Location 10 kilometres northwest of the city of Guanajuato in the state of Guanajuato
Access 40 minutes by municipal gravel road to the town of La Luz
Property Approximately 2,500 hectares in the second largest historic silver mining district in Mexico
Infrastructure State power grid; local labour, supplies, and services
Operations 3 mines feed a central, 1,600-tonne-per-day flotation plant to produce mineral concentrates
Geology Low-sulphidation epithermal veins typically thousands of metres long, 200 metres deep, and 1 to 10 metres thick

 

2016 Production

  • 1.0 million ounces of silver 
  • 30,720 ounces of gold
  • 3.4 million ounces of silver equivalent, at a 75:1 ratio

Reserves and Resources (at December 31, 2016)

  • 1.3 million ounces of proven and probable silver
  • 4.1 million ounces of measured and indicated silver
  • 5.7 million ounces of inferred silver 
  • 28,100 ounces of proven and probable gold 
  • 52,300 ounces of measured and indicated gold 
  • 84,800 ounces of inferred gold


Production Statistics

 
YEAR SILVER (oz) GOLD (oz) SILVER EQUIV. (oz) (1)
2016 1,052,617 30,720 3,356,617
2015 1,449,773 23,966 3,247,223
2014 2,396,179 37,108 5,179,279
2013 2,881,816 51,652 6,755,716
2012 1,668,128 25,920 3,612,128
2011 1,048,093 14,943 2,168,818
2010 837,000 11,675 1,712,625
2009 728,000 8,421 1,359,575
2008 485,000 4,231 802,325
2007
(8 months)
228,000 2,360 405,000

(1) Gold converted to silver at a 75:1 ratio

Bolañitos is Endeavour’s second and most profitable mine, acquired in 2007 and located 10 kilometres northwest of the city of Guanajuato in the state of Guanajuato. Access is by municipal road and infrastructure includes the state power grid and local labour, supplies and services in the city of Guanajuato. The property covers approximately 2,500 hectares in the second largest historic silver mining district in Mexico.

The Bolañitos sub-district is characterized by low-sulphidation epithermal veins typically thousands of metres long, up to 250 metres deep, and ranging from one to 15 metres thick. Since acquisition Endeavour has discovered seven high-grade silver-gold ore- bodies, opened one new mine and completed three plant expansions. Today Bolañitos comprises two underground mining operations feeding a central, 1,600 tonne-per-day plant to produce bulk silver-gold concentrates, employing 400 people and 200 contractors.

In 2016, Bolañitos produced 1.0 million ounces of silver and 30,720 ounces of gold, totaling 2.8 million ounces of silver equivalents. Silver and gold production exceeded guidance due to higher throughput, partially offset by lower silver grades and gold-silver recoveries.

 

 

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