geologic controls on mineralization at khoemacau’s zone 5 ...€¦ · 3blue clay agencies,...
TRANSCRIPT
NE
Recent Drill Results – Zone 5 Cu Grade Long Section
Indicated
boundary
Inferred
boundary
1,000 mRL
800 mRL
600 mRL
400 mRL
200 mRL
00 mRL
Cu% * 5m Length
< / = 1.0%
1.0 – 1.5%
1.5 – 2.0%
2.0 – 2.5%
> / = 2.5%Completed HoleWaiting for assay results
SW
500 m
Geologic Controls on Mineralization at Khoemacau’s Zone 5 Cu-Ag
Deposit, Kalahari Copper Belt, Botswana
200 km
Khoemacau Project
Introduction
Location
Regional Setting and Stratigraphy
• The Kalahari Copper Belt (KCB) is host to a number of strata-
bound Cu-Ag deposits and mining operations in southern Africa
• The Khoemacau Project area is located within this belt and
hosts the Zone 5, high grade Cu-Ag deposit
• Recent drilling at Khoemacau’s Zone 5 deposit has outlined an
estimated 100.3 Mt @ 2.0 % Cu and 20 g/t Ag at a 1.0 % Cu
cut-off that remains open at depth and along strike
V V
V
V
V
Cu-Ag
LithologyAge
MamunoFormation (~1,500 m)
D’KarFormation
(~1,500 to 2,500 m)
Ngwako PanFormation
(0 to 3,500 m)
Kuke Formation
KgwebeFormation
(0 to ~2,500 m)
GH
AN
ZI G
RO
UP
Late
Mes
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rozo
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Unconformity
Unconformity
• The KCB forms the southern margin of the Pan-African Damaran
Orogeny
• Crustal shortening, regional folding, thrusting and shearing resulted in
northeast trending, doubly plunging anticlines
• The lower D’Kar formation hosts high grade Cu & Ag (>1.0% Cu) and is
part of the Ghanzi Group Sediments
• The Ghanzi Group sediments were deposited during the Neoproterozoic
into an intra-cratonic rift basin
Regional Mineralization
Disseminated Strata-bound Copper
Reduced Hanging Wall
D’Kar Formation
Oxidized Footwall
Ngwako Pan Formation
Hydrothermal Trap Site Environment
Ngwako Pan
Formation
D’Kar
Formation
Zone 5
faults
&
thrusts
folds
Stratigraphic
Zonation:
Pyrite (HW)
Sphalerite
Galena
Chalcopyrite
Bornite
Chalcocite (FW)
Section
N125150
100 m
56°
D’Kar
Formation
Ngwako Pan
Formation
Kalahari
Sand
Average 9 m @
2.0% Cu, 20 g/t Ag
Zone 5 Deposit
A
A’
56°
• High grade Cu-Ag mineralization intersected at depths > 1,200 m below surface
• Ore is situated between two competent, thick sandstone units (NPF & MSST)
• Vein shears are sub-parallel to bedding and cross cut host rock assemblages
• > 425 holes and > 190,000 m of drilling at Zone 5
• Khoemacau Copper Mining drilled > 325 core holes,
~170,000 m (27 rigs operating in 2015)
2.7 % Cu, 30 g/t Ag
11 m
2.3 % Cu, 19 g/t Ag
11 m
2.7 % Cu, 31 g/t Ag
12 m
2.1 % Cu, 24 g/t Ag
12 m
Continuity
Ore StylesHydrothermal Breccia Vein Hosted Copper
HA-947b-D (726.13m – 727.13m) Core Assay: 9.7 % Cu, 66 g/t Ag
Quartz – Calcite VeinBornite & ChalcociteHost: fine grained siltstone
4.7 cm
HA-920-D (610.18m to 628.45m = 18.3m)
Core Assay: 3.3 % Cu, 22 g/t Ag
Host: fine grained siltstone Bornite & Chalcopyrite
Disseminated & Cleavage Veinlet Hosted Copper
Cleavage & Fracture Fill
4.7 cmHA-920-D (610.18m – 611.03m) Core Assay: 3.7 % Cu, 24 g/t Ag
Hydrothermal Reactivated Vein Shear Hosted Copper
HA-951b-D (597.69m – 598.41m) Core Assay: 6.1 % Cu, 33 g/t Ag
Sheared Quartz – Calcite VeinBorniteHost: fine grained siltstone
4.7 cm
• Cu-Fe-S (bornite, chalcopyrite) dominate high grade vein
shears with accompanying Cu-S (chalcocite)
• >1% Cu mineralization hosted in hydrothermal quartz veins
with adjacent >0.1% Cu disseminations
• Repeated mineralization events and pervasive fluid flow
Mineral Resource Tabulation
• Recent drilling has confirmed an additional 24 Mt
grading 1.9% Cu and 20 g/t Ag
• In the last year, drilling increased the total
contained Cu by 39% at a higher grade of 2.0%
Cu from 1.9% Cu
• Historic resource conversion rate of 100%
Zone 5
100.3 Mt
2.0 % Cu,
20 g/t Ag
20 km
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OPEN
OPEN
OPEN
Catherine Knight [email protected] 1,2*
John Deane,2 David J. Catterall,3 and M. Stephen Enders1
1Cupric Canyon Capital LLC, Scottsdale, Arizona 852582Cupric Africa, Bedfordview, South Africa
3Blue Clay Agencies, Farscape Exploration, Maun, Botswana
Conclusions
• Sediment hosted strata-bound deposit
• Mineralization is hosted within siltstones and sandstones
within the D’Kar formation near the Ngwako Pan formation
contact
• Copper sulfide mineralization is predominately bornite, chalcopyrite and chalcocite
• Mineralization is typically zoned vertically and laterally
• Progressive structural deformation lead to multiple episodes of mineralization and an
extensive system of quartz and quartz carbonate shears and brecciation
3.1% Cu, 30 g/t Ag
17 m
3.4% Cu, 30 g/t Ag
23 m
Zone 5 – July 2015
1% Cu cut-off (sulfide only)
HA-1049-D
10.7% Cu, 122 g/t Ag
2 m
M tonnes Cu% Ag g/t
Measured 16.1 2.2 20
Indicated 24.3 2.0 19
Inferred 35.9 1.9 20
Total All 76.3 2.0 20
3.7% Cu, 39 g/t Ag
20 m
2.3% Cu, 27 g/t Ag
13 m
Interbedded alternating
silts and sands
Marker sandstone
Carbon rich siltstone
Limestone
Lower marl
Footwall sandstone
Not to scale
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