Projects
West Desert
Location and Access
Regional Geology
Property Geology and Mineralization
West Desert Zn-Cu-In Deposit
High Grade Silver
Molybdenum
Resource Estimate
Preliminary Economic Assessment





West Desert Zn-Cu-In Deposit


The property is underlain by a sequence of Paleozoic dolostones with lesser, generally thin-bedded limestones and minor interbedded quartzites and shales. These have been offset by the Juab fault, a west-northwesterly trending, northerly dipping normal fault that trends through the middle of the property. A late Eocene quartz monzonite intrusive complex underlies a large part of the property at depth but is not exposed at surface. In the vicinity of the West Desert deposit, it rises to the bedrock surface in a cupola which subcrops below shallow Pleistocene gravels.

The West Desert deposit consists of coarse-grained sphalerite with minor chalcopyrite occurring in skarn developed in thin-bedded, shaly carbonate rocks near the intrusive complex. Two main types of skarn have been distinguished, the most common consisting of humite ± magnetite ± phlogopite along with lesser spinel, periclase, actinolite, forsterite, and tremolite. Magnetite is very abundant and often massive. A second and less common type of skarn consists of bands of reddish brown grossularite garnet separated by bands of fine-grained diopside and potassium feldspar. Carbonate rocks peripheral to the skarn and intrusive complex have been converted to marble.

The West Desert deposit occurs in two principal zones separated by the Juab fault, the Main zone being situated in Ordovician carbonate rocks north of the fault and the Deep zone in similar rocks of Cambrian age to the south. Sphalerite in both zones is generally medium to coarse-grained. Chalcopyrite occurs in both zones and also in areas where it is the dominant mineral with lesser or no zinc.. The overall abundance of pyrite and other iron sulphides such as pyrrhotite in the West Desert system is very low. The Main zone has been oxidized to an average depth of about 250 metres and sphalerite and chalcopyrite have been converted to a mixture of smithsonite, hemimorphite, hydrozincite, and zincite with lesser wulfenite, covellite, frankinite, malachite and gageite in a matrix of various iron and manganese oxides.

InZinc Mining's work has shown that indium is present in significant quantities in the West Desert deposit. Initial petrography and energy dispersive X-ray (EDX) analysis has shown that it is present essentially only in sphalerite as a lattice substitution in amounts as high as an exceptional 8% by weight. As is generally the case for all minor elements in ore deposits, the recoverability of indium at West Desert will need to be determined by metallurgical testwork and how much may be payable will depend on smelter demand and terms. However, the levels seen at West Desert have the potential to substantially enhance the economics of the project and may even establish West Desert as a significant indium resource in its own right.

To date, mineralization in the Main zone has been traced with drilling over a length of about 525 metres, a width of about 150 metres and to a depth of 575 metres and remains open to the west and to depth. A number of separate mineralized horizons comprising the Deep zone have been traced with drilling over an area of about 330 metres by 225 metres at depths of between about 450 to 750 metres. They remain open to the west, south, and possibly the east. Some of the more significant intercepts encountered in InZinc Mining’s drilling are listed below:

Hole From To Metres % Zn % Cu Ppm In % MoS2 Zone
C07-01
52.49
70.10
17.61
10.56
0.13
22.9
0.002
Oxide
C07-01
123.75
136.25
12.50
27.08
0.59
8.7
0.002
Oxide
C07-01
149.35
155.75
6.40
8.51
0.05
25.0
0.006
Oxide
C07-01
364.54
381.00
16.46
5.01
0.05
17.3
0.001
Main
C07-01
404.16
420.32
16.16
10.50
0.11
30.6
0.010
Main
C07-01
458.72
510.50
51.78
3.73
0.15
139.7
0.001
Main
C07-01
623.30
640.10
16.80
2.93
0.14
205.8
0.001
Main
C07-02
367.90
385.27
17.37
27.30
0.46
28.9
0.001
Main
C07-02
416.97
427.94
10.97
15.59
0.45
30.6
0.011
Main
C07-02
594.82
606.40
11.58
0.11
1.19
47.4
0.102
Main
C07-03
145.08
152.55
7.47
16.08
0.41
20.9
0.000
Oxide
C07-03
304.65
334.67
30.02
17.93
0.53
50.1
0.001
Main
C07-03
456.74
461.92
5.18
1.45
1.56
221.5
0.022
Main
C07-05
182.58
190.96
8.38
10.00
0.11
96.5
0.001
Main
C07-05
226.77
244.45
17.68
7.78
0.06
33.6
0.000
Main
C07-05
281.64
295.35
13.71
6.17
0.02
53.1
0.000
Main
C07-05
347.17
375.82
28.65
4.00
0.38
111.7
0.005
Main
C08-06
477.94
513.84
35.90
9.37
0.21
91.1
0.001
Deep
C08-06
532.04
542.54
10.50
18.47
1.82
47.4
0.002
Deep
C08-06
558.74
577.96
19.22
12.75
0.43
100.7
0.009
Deep
C08-09
450.90
456.30
5.40
10.02
0.41
22.4
0.000
Deep
C08-10
57.17
66.87
9.70
9.14
0.18
9.9
0.005
Oxide
C08-12
509.32
517.55
8.23
5.71
0.23
102.9
0.008
Deep
C08-12
539.96
549.71
9.75
11.15
0.40
82.7
0.009
Deep
C08-13A
723.44
733.50
10.06
7.20
0.17
126.6
0.055
Deep
C08-14
563.73
573.48
9.75
5.42
0.23
45.1
0.027
Deep

Outside of the main deposit area, other skarn-related zinc occurrences include a Utah drill hole intersection of a 3.05 metre interval grading 7.65% Zn, 3.50% Cu and 0.100% Mo at a depth of 889 metres and a horizontal distance of about 650 metres to the east of the Main West Desert zone. This appears to be situated in the same favourable stratigraphy as the Main zone and may be part of the same overall mineralizing system. Finally, although drilling north of the main intrusive cupola is sparse and generally shallow, several historical drill holes intersected narrow intervals of skarn zinc mineralization in this area, suggesting potential to discover additional resources here as well.

The property is underlain by a sequence of Paleozoic dolostones with lesser, generally thin-bedded limestones and minor interbedded quartzites and shales. These have been offset by the Juab fault, a west-northwesterly trending, northerly dipping normal fault that trends through the middle of the property. A late Eocene quartz monzonite intrusive complex underlies a large part of the property at depth but is not exposed at surface. In the vicinity of the West Desert deposit, it rises to the bedrock surface in a cupola which subcrops below shallow Pleistocene gravels.

The West Desert deposit consists of coarse-grained sphalerite with minor chalcopyrite occurring in skarn developed in thin-bedded, shaly carbonate rocks near the intrusive complex. Two main types of skarn have been distinguished, the most common consisting of humite ± magnetite ± phlogopite along with lesser spinel, periclase, actinolite, forsterite, and tremolite. Magnetite is very abundant and often massive. A second and less common type of skarn consists of bands of reddish brown grossularite garnet separated by bands of fine-grained diopside and potassium feldspar. Carbonate rocks peripheral to the skarn and intrusive complex have been converted to marble.

The West Desert deposit occurs in two principal zones separated by the Juab fault, the Main zone being situated in Ordovician carbonate rocks north of the fault and the Deep zone in similar rocks of Cambrian age to the south. Sphalerite in both zones is generally medium to coarse-grained. Chalcopyrite occurs in both zones and also in areas where it is the dominant mineral with lesser or no zinc.. The overall abundance of pyrite and other iron sulphides such as pyrrhotite in the West Desert system is very low. The Main zone has been oxidized to an average depth of about 250 metres and sphalerite and chalcopyrite have been converted to a mixture of smithsonite, hemimorphite, hydrozincite, and zincite with lesser wulfenite, covellite, frankinite, malachite and gageite in a matrix of various iron and manganese oxides.

InZinc Mining's work has shown that indium is present in significant quantities in the West Desert deposit. Initial petrography and energy dispersive X-ray (EDX) analysis has shown that it is present essentially only in sphalerite as a lattice substitution in amounts as high as an exceptional 8% by weight. As is generally the case for all minor elements in ore deposits, the recoverability of indium at West Desert will need to be determined by metallurgical testwork and how much may be payable will depend on smelter demand and terms. However, the levels seen at West Desert have the potential to substantially enhance the economics of the project and may even establish West Desert as a significant indium resource in its own right.

To date, mineralization in the Main zone has been traced with drilling over a length of about 525 metres, a width of about 150 metres and to a depth of 575 metres and remains open to the west and to depth. A number of separate mineralized horizons comprising the Deep zone have been traced with drilling over an area of about 330 metres by 225 metres at depths of between about 450 to 750 metres. They remain open to the west, south, and possibly the east. Some of the more significant intercepts encountered in InZinc Mining’s drilling are listed below:

Hole From To Metres % Zn % Cu Ppm In % MoS2 Zone
C07-01
52.49
70.10
17.61
10.56
0.13
22.9
0.002
Oxide
C07-01
123.75
136.25
12.50
27.08
0.59
8.7
0.002
Oxide
C07-01
149.35
155.75
6.40
8.51
0.05
25.0
0.006
Oxide
C07-01
364.54
381.00
16.46
5.01
0.05
17.3
0.001
Main
C07-01
404.16
420.32
16.16
10.50
0.11
30.6
0.010
Main
C07-01
458.72
510.50
51.78
3.73
0.15
139.7
0.001
Main
C07-01
623.30
640.10
16.80
2.93
0.14
205.8
0.001
Main
C07-02
367.90
385.27
17.37
27.30
0.46
28.9
0.001
Main
C07-02
416.97
427.94
10.97
15.59
0.45
30.6
0.011
Main
C07-02
594.82
606.40
11.58
0.11
1.19
47.4
0.102
Main
C07-03
145.08
152.55
7.47
16.08
0.41
20.9
0.000
Oxide
C07-03
304.65
334.67
30.02
17.93
0.53
50.1
0.001
Main
C07-03
456.74
461.92
5.18
1.45
1.56
221.5
0.022
Main
C07-05
182.58
190.96
8.38
10.00
0.11
96.5
0.001
Main
C07-05
226.77
244.45
17.68
7.78
0.06
33.6
0.000
Main
C07-05
281.64
295.35
13.71
6.17
0.02
53.1
0.000
Main
C07-05
347.17
375.82
28.65
4.00
0.38
111.7
0.005
Main
C08-06
477.94
513.84
35.90
9.37
0.21
91.1
0.001
Deep
C08-06
532.04
542.54
10.50
18.47
1.82
47.4
0.002
Deep
C08-06
558.74
577.96
19.22
12.75
0.43
100.7
0.009
Deep
C08-09
450.90
456.30
5.40
10.02
0.41
22.4
0.000
Deep
C08-10
57.17
66.87
9.70
9.14
0.18
9.9
0.005
Oxide
C08-12
509.32
517.55
8.23
5.71
0.23
102.9
0.008
Deep
C08-12
539.96
549.71
9.75
11.15
0.40
82.7
0.009
Deep
C08-13A
723.44
733.50
10.06
7.20
0.17
126.6
0.055
Deep
C08-14
563.73
573.48
9.75
5.42
0.23
45.1
0.027
Deep

Outside of the main deposit area, other skarn-related zinc occurrences include a Utah drill hole intersection of a 3.05 metre interval grading 7.65% Zn, 3.50% Cu and 0.100% Mo at a depth of 889 metres and a horizontal distance of about 650 metres to the east of the Main West Desert zone. This appears to be situated in the same favourable stratigraphy as the Main zone and may be part of the same overall mineralizing system. Finally, although drilling north of the main intrusive cupola is sparse and generally shallow, several historical drill holes intersected narrow intervals of skarn zinc mineralization in this area, suggesting potential to discover additional resources here as well.