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7/25/2019 Exotica Dold
1/10
7/25/2019 Exotica Dold
2/10
CHUQUICAMATA DEPOSITEEXOTICA DEPOSITE
LEACHED ZONE
OXIDATION ZONE
ENRICHED ZONE
MINERALIZED BEDROCK
MINERALIZED GRAVEL
BARREN GRAVEL
6 km 4.5 km
PRIMARY ZONE
LEACHED ZONE
jt + Fe(III)hydroxides
ENRICHED ZONE
cc, cv
PRIMARY ZONE
OXIDATION ZONE
jt + Fe(III)hydroxides
(schwertmannite)
NEUTRALIZATION ZONE
cv
PRIMARY ZONE
Supergene enriched
porphyry copper systemOxidizing porphyry copper tailings
!1 - 6% sulfides
System Analysis
Gossan
Fe(III)oxides goe + hm
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Dold & Fontbot (2001)
40 m
cp
40!m
cpcv
sl
EnriquecimientoEnriquecimientodedehastahasta0.6% Cu0.6% Cu
Dold & Lichtner (in prep.)
2 3 4 5 6 7 8 9pH
1000
900
800700
600
500
400
300
200
100
0
ep(cm)
0 200 400 600 800
Eh (mV)
0 400 800 120Cu (mg/l)
Depth(m)
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SOLUTION 1 APS2
temp 15
pH 2.31pe 12.2
Redox pe
Units mg/l
density 1
Ca 463
Na 6.67
K 11.5
Al 2080
Cu 910
Mg 1430
Mn 92.9
S(6) 23100
Cl 70.5Zn 32.6
Si 50.9
Fe 1380
CHUQUICAMATA DEPOSITEEXOTICA DEPOSITE
LEACHED ZONE
OXIDATION ZONE
ENRICHED ZONE
MINERALIZED BEDROCK
MINERALIZED GRAVEL
BARREN GRAVEL
6 km 4.5 km
PRIMARY ZONE
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CHUQUICAMATA DEPOSITEEXOTICA DEPOSITE
LEACHED ZONE
OXIDATION ZONE
ENRICHED ZONE
MINERALIZED BEDROCK
MINERALIZED GRAVEL
BARREN GRAVEL
6 km 4.5 km
PRIMARY ZONE
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0 2 4 6 8 10 12
-1.0
-0.5
0.0
0.5
1.0
pH
[C u 2+ ]T O T
= 1 4 . 3 0 m M
[C l !]T O T
= 5 6 . 3 4 m M
[ S i ( O H )4
]T O T
= 1 8 1 . 1 0 m M
0 2 4 6 8 10 12
-1.0
-0.5
0.0
0.5
1.0
EhSHE
/V
pH
[ Cu 2+ ]T O T
= 1 4 . 3 0 m M
[ Cl !]T O T
= 1 . 99 m M
[ S i ( O H )4 ] TO T = 1 . 81 m M
0 2 4 6 8 10 12
-1.0
-0.5
0.0
0.5
1.0
pH
[ C u 2 + ]T O T
= 1 4 . 3 0 m M
[ C l !]T O T
= 5 6 . 3 4 m M
[ S i ( O H ) 4 ] T O T = 7 0 . 0 0 m M
t = 2 5 Ct = 2 5C t = 2 5 C
Cu2Cl(OH)3Atacamite
Cu
CuCl(c)
Cu2O(c)
CuO(c)
Cu Cu2Cl(OH)3
Atacamite
CuSiO3nH2O
Chrysocolla CuO(c)
Cu2O(c)
CuCl(c)
CuCu2Cl(OH)3Atacamite
CuSiO3nH2O
ChrysocollaCuO(c)
Cu2O(c)
CuCl(c)
A) B) C)
-20
-15
-10
-5
0
5
10
2 3 4 5 6 7
pH
SaturationI
ndex
(SI)
si_atacamite
si_chrysocolla
si_atacamite
si_kaolinite
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CHUQUICAMATA DEPOSITEEXOTICA DEPOSITE
LEACHED ZONE
OXIDATION ZONE
ENRICHED ZONE
MINERALIZED BEDROCK
MINERALIZED GRAVEL
BARREN GRAVEL
6 km 4.5 km
PRIMARY ZONE
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