Colleen Atherton , Sean Sinclair, David Wilson, Jordan Zak, David Barsi, Rich Amos, Carol Ptacek ...

21 Pages·2017·5.01 MB·English

Diavik Waste Rock Project
Colleen Atherton , Sean Sinclair, David Wilson, Jordan Zak,
David Barsi, Rich Amos, Carol Ptacek, Jeff Langman, Dogan
Paktunc, David Blowes, Leslie Smith, Dave Sego
November 30, 2016

MEND
DIAVIK WASTE ROCK PROJECT

Introduction
Covered Pile
Diavik Waste Rock Project
(0.082 wt. % S)

Type I Pile
(0.035 wt. % S)
Type III Pile
(0.053 wt. % S)

1
DIAVIK WASTE ROCK PROJECT

Type I test pile
•  Type I rock:
•  Granite
•  Granite pegmatite
•  Biotite schist
•  Sulfide content: < 0.04 wt.% S
Diavik Waste Rock Project
•  Type I test pile (Smith et al., 2013)
•  Average S Content: 0.035 wt. % S (0.0028-0.26 wt.% S)
•  Average C Content: 0.033 wt. % C
•  Average NPR: 12.2
2
DIAVIK WASTE ROCK PROJECT

Deconstruction of the Type I test pile
•  Deconstructed in
2014
•  Samples collected
from over 600
discrete locations
•  DPiaovrike W wasatet eRor ck Project
extracted via
centrifugation
•  C and S analysis
•  Mineralogical
investigation
3
DIAVIK WASTE ROCK PROJECT

15 m cross section – S, CaCO and NPR
3
C wt. %
0.05
450
0.04
0.03
0.02
445
0.01
0
440
)
l
s 0 10 20 30 40 50 60 70
a
m S wt. %
0.05
( 450
0.04
n
0.03
o
iDiavik Waste Rock Project 0.02
t 445
a 0.01
v
0
e
l
E 440
0 10 20 30 40 50 60 70
NPR
10.0
450
7.5
5.0
445 2.5
0.0
440
0 10 20 30 40 50 60 70
Horizontal Distance (m)
4
DIAVIK WASTE ROCK PROJECT

15 m cross section – NPR and pH

pH
8.5
450
7.5
6.5
) 445 5.5
l 4.5
s
a
m
440
(
0 10 20 30 40 50 60 70
n
o NPR
Diavik Waste Rock Project
i 10
t 450
a
7.5
v
e 5
l
E 445 2.5
0
440
0 10 20 30 40 50 60 70
HorizontalDistance (m)
5
DIAVIK WASTE ROCK PROJECT

15 m cross section – pH, alkalinity, and SO 2-
4
pH
A
8.5
450
7.5
6.5
5.5
445
pH 4.5
440
0 10 20 30 40 50 60 70
Alkalinity
B
) 100
sl 450
a 75
m
Alkalinity ( 50
n
o 445
(mg L-1) i 25
Diavikt Waste Rock Project
a
v 0
e
l
E 440
0 10 20 30 40 50 60 70
Sulfate
C
3
450
2
SO 2- 1
4
445 0
(g L-1)
440
0 10 20 30 40 50 60 70
HorizontalDistance (m)
6
DIAVIK WASTE ROCK PROJECT

15 m cross section – Fe, Ni, Ni:Co

Fe
A
2
450
1.5
1
0.5
445
Fe 0
(mg L-1)
440
0 10 20 30 40 50 60 70
Ni
B
) 8
sl 450
a 6
m
4
Ni (
n 2
o 445
(mg LD-1)i avikti Waste Rock Project 0
a
v
e
l
E 440
0 10 20 30 40 50 60 70
Ni:Co
C
10
450
7.5
5
Ni:Co
2.5
445
0
440
0 10 20 30 40 50 60 70
HorizontalDistance (m)
7
DIAVIK WASTE ROCK PROJECT

Transverse cross section
Diavik Waste Rock Project
8
DIAVIK WASTE ROCK PROJECT

Transverse cross section – pH, alkalinity, SO 2-
4
A pH
450 8.5
7.5
6.5
445 5.5
pH
4.5
440
10 20 30 40 50 60
B AlkalinitypH
) A
sl 445500 100 8.5
a 75 7.5
m
Alkalinity
15 m ( 50 6.5
n 5.5
(mg LD-1)i aviok W444455aste Rock Project 25
Profile i 4.5
t
a 0
v
e
l 440
E 440
0 10 20 30 40 50 60 70
10 20 30 40 50 60
C Sulfate
450 3
SO 2-
2
4
(mg L-1) 1
445
0
440
10 20 30 40 50 60
Horizontal Distance (m) 9