The Bisha Main deposit is a high grade VMS deposit. It is configured in three distinct layered zones - a 35 meter thick surface gold-silver oxide zone (mined out in mid-2013) immediately overlying a copper enriched supergene zone (mined out in 2016) which itself overlies a primary sulphide zone containing both zinc and copper.

Mineral Reserves (Bisha and Harena)

Effective December 31, 2016

  Total Reserves (Proven & Probable)
  Tonnes
('000's)
Copper
%
Zinc
%
Gold
g/t
Silver
g/t
Supergene 12 2.57 - 0.71 17
Primary 9,579 1.05 6.16 0.69 45
Total 9,591  

Notes:
Effective December 31, 2016
1.0MT proven and rest probable category
Qualified person for mineral reserves is Anoush Ebrahimi, Ph.D. at SRK Consulting.
See NR dated August 9, 2017 and the associated Technical Report on nevsun.com for details.

Mineral Reserves are defined within a mine plan, with open pit phase designs guided by Lerchs-Grossmann optimized pit shells, generated using long-term metal prices for copper, zinc, gold, and silver of $2.74/pound, $0.95/pound, $1,100/ounce, and $18.50/ounce respectively.

For more details on reserves, including assumptions, please click here.

Mineral Resources

Effective December 31, 2016*

Measured
  Tonnes Copper Zinc Silver Gold
Domain (`000s) (%) (%) (g/t) (g/t)
Oxide 10     40 8.4
Supergene 30 2.97   30 0.6
Boundary 10 5.57 1.24 54 0.6
Primary 1,250 1.02 6.62 42 0.8
Total Measured 1,300  
 
Indicated
  Tonnes Copper Zinc Silver Gold
Domain (`000s) (%) (%) (g/t) (g/t)
Supergene 1,130 1.45   10 0.3
Boundary 60 1.34 1.85 24 0.5
Primary 32,480 1 4.24 33 0.5
Total Indicated 33,660  
Total Measured and Indicated
(including stockpiles)
37,800  
 
Inferred
  Tonnes Copper Zinc Silver Gold
Domain (`000s) (%) (%) (g/t) (g/t)
Oxide 650     19 2.9
Supergene 880 1.19   4 0.4
Primary 28,900 0.99 5.21 31 0.8
Total Inferred 30,430  
Total Inferred
(including stockpiles)
30,940  

Notes:
Effective December 31, 2016 for all deposits except Hambok and Northwest which have effective date of December 31, 2014
Qualified person for mineral resource is Phil Jankowski of BMSC.
See NR dated March 23, 2017 and the Dec 31, 2016 Technical Report for details
Resources inclusive of reserves

For more details on mineral resources, including assumptions, please click here.

A full description of the Bisha mineral resource and metallurgy may be found in the Company's Technical Report.

 

Deposit Configuration