Hochschild's flagship operation
Inmaculada is a 20,000 hectare gold and silver underground mine
Inmaculada consists of 40 mining concessions and is located in the Ayacucho Department in southern Peru.
Inmaculada is 112 kilometres from the Pallancata operation and was originally owned in a joint venture in which the Group held a 60% controlling stake, with the remaining 40% held by IMZ. After completion of the acquisition of IMZ in December 2013, the Inmaculada mine is 100% owned directly by Hochschild.
Proved and Probable Reserves
Measured & Indicated Resources
Inmaculada is Hochschild's key asset
Commissioned in 2015, the property consists of forty mining concessions and is characterised by both low and high sulphidation epithermal mineralised systems, hosted by veins, breccias and disseminations within tertiary volcanic. We have found an additional 3 million gold equivalent ounces since operations commenced and there remains strong geological upside.
The original 2012 feasibility study was based on resources of the main Angela vein, accessed through a ramp starting from a portal located at an elevation of approximately 4,400 metres ASL. A primary crusher plant is situated close to the portal with a conveyor belt 1.5km in length, transporting ore to the plant and a waste dump located one km to the south. The mining methods employed are sub-level stoping, utilising long-hole drilling and paste backfill as well as cut-and-fill utilising horizontal drilling.
Integrated map of Hochschild Operations and Projects in Peru
|Key mine statistics||2021||2020||2019||2018||2017||2016||2015|
|Ore production (tonnes)||1,349,892||948,937||1,338,569||1,323,525||1,295,701||1,306,606||659,637|
|Average silver grade (g/t)||174||154||163||150||145||133||115|
|Average gold grade (g/t)||4.05||4.33||4.71||4.36||4.15||4.21||4.36|
|Silver produced (koz)||6,236||4,034||5,747||5,690||5,506||4,908||2,055|
|Gold produced (koz)||165.73||129.17||189.18||174.2||165.07||162.71||84.64|
|Silver equivalent produced (koz)||20,488||15,143||21,070||18,581||17,721||16,948||8,318|
|Silver sold (koz)||6,216||4,020||5,732||5,676||5,498||5,004||1,638|
|Gold sold (koz)||165.86||129.7||188.59||172.4||162.32||164.75||67.51|
|Resources (attrib. Moz Ag Eq)||229.2||220.3||233.8||212.7||126.4||143.8||138.7|