geologic controls on mineralization at khoemacau’s zone 5 ...€¦ · 3blue clay agencies,...

1
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 Hole Waiting for assay results SW 500 m Geologic Controls on Mineralization at Khoemaca u’s Zone 5 Cu-Ag Deposit, Kalahari Copper Belt, Botswana 200 km Khoemaca u 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 Khoemaca u Project area is located within this belt and hosts the Zone 5, high grade Cu-Ag deposit Recent drilling at Khoemaca u’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 Lithology Age Mamuno Formation (~1,500 m) D’Kar Formation (~1,500 to 2,500 m) Ngwako Pan Formation (0 to 3,500 m) Kuke Formation Kgwebe Formation (0 to ~2,500 m) GHANZI GROUP Late Mesoproterozoic N e o p r o t e r o z o I c 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 Khoemaca u 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 Styles Hydrothermal Breccia Vein Hosted Copper HA-947b-D (726.13m 727.13m) Core Assay: 9.7 % Cu, 66 g/t Ag Quartz Calcite Vein Bornite & Chalcocite Host: 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 cm HA-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 Vein Bornite Host: 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 N OPEN OPEN OPEN Catherine Knight [email protected] 1,2* John Deane, 2 David J. Catterall, 3 and M. Stephen Enders 1 1 Cupric Canyon Capital LLC, Scottsdale, Arizona 85258 2 Cupric Africa, Bedfordview, South Africa 3 Blue 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 2m 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 N

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Page 1: Geologic Controls on Mineralization at Khoemacau’s Zone 5 ...€¦ · 3Blue Clay Agencies, Farscape Exploration, Maun, Botswana Conclusions • Sediment hosted strata-bound deposit

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

op

rote

rozo

icN

e o

p r

o t

e r

o z

o I

c

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

N

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

N