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Cu 11.2% Oxide Lonshi CD

Category: BASE METALS 
Product Code: AMIS 0050

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DOWNLOAD AMIS CERTIFICATE (PDF)
AMIS0050 Copper, oxide, Lonshi, 11.2%, DRC

Origin of Material: This standard was made using oxide ore sourced from the Lonshi Copper Mine which is owned and operated by Compagnie Miniere du Sakania sprl (Comisa), a wholly owned Congolese subsidiary of First Quantum Minerals Ltd (FQM). The mine is situated in the Congo Pedicle region of the Province of Katanga, Democratic Republic of the Congo.

 

Lonshi is a sediment hosted, structurally controlled deposit of Copperbelt type. In contrast to other Copperbelt deposits, Lonshi is interpreted to occur at or near the upper contact of the Upper Roan Group where a sheared and tectonised clastic unit, the Lonshi Conglomerate, is in thrust contact with overlying  carbonaceous, silty, dolomitic marbles. This folded and thrusted contact is the locus for mineralization which occurs in both the conglomerate and the intensely weathered dolomite.

 

Primary sulphide mineralization, mainly chalcopyrite, occurs as carbonate clast replacement in the conglomerate, and as disseminations and rare veinlets in both conglomerate and dolomite. Supergene enrichment and subsequent deep oxidation, has resulted in complete carbonate destruction in the dolomite, within the weathering zone, and formation of chalcocite now largely oxidized to malachite and black Cu oxide minerals.

Recommended Concentration and two “Between Laboratory” Standard Deviations

Certified Concentrations (economic elements)

 

Co

(M/ICP)

97.4

±

10

ppm

Cu

(acidsol)

11.22

±

0.79

%

Cu

(F)

11.23

±

0.67

%

Cu

(M/ICP)

11.28

±

0.83

%

Cu

(P)

11.26

±

0.86

%

U

(M/ICP)

12.6

±

0.9

ppm

 

Provisional Concentration (economic elements)

 

Ni

(M/ICP)

87

±

14

ppm

 

Indicated Means

 

Au

(PbColl)

0.016

 

g/t

Cu

(XRF)

11.71

 

%

Zn

(M/ICP)

31

 

ppm

 

 

Certified Concentrations (major elements)

 

 

Al2O3

11.88

±

0.70

%

CaO

0.30

±

0.02

%

Fe2O3

6.48

±

0.40

%

K2O

2.61

±

0.14

%

LOI

11.9

±

1.1

%

MgO

0.67

±

0.06

%

SiO2

50.91

±

3.42

%

TiO2

0.83

±

0.04

%

 
Provisional Concentrations (major elements)

 

MnO

0.065

±

0.010

%

Na2O

0.72

±

0.08

%

P2O5

0.25

±

0.046

%

S

0.12

±

0.024

%

 
Indicated Mean (major elements)

 

Cr2O3

0.031

%

 

 

 

Additional information is available on the certificate.

 

Origin of Material: This standard was made using oxide ore sourced from the Lonshi Copper Mine which is owned and operated by Compagnie Miniere du Sakania sprl (Comisa), a wholly owned Congolese subsidiary of First Quantum Minerals Ltd (FQM). The mine is situated in the Congo Pedicle region of the Province of Katanga, Democratic Republic of the Congo.

 

Lonshi is a sediment hosted, structurally controlled deposit of Copperbelt type. In contrast to other Copperbelt deposits, Lonshi is interpreted to occur at or near the upper contact of the Upper Roan Group where a sheared and tectonised clastic unit, the Lonshi Conglomerate, is in thrust contact with overlying  carbonaceous, silty, dolomitic marbles. This folded and thrusted contact is the locus for mineralization which occurs in both the conglomerate and the intensely weathered dolomite.

 

Primary sulphide mineralization, mainly chalcopyrite, occurs as carbonate clast replacement in the conglomerate, and as disseminations and rare veinlets in both conglomerate and dolomite. Supergene enrichment and subsequent deep oxidation, has resulted in complete carbonate destruction in the dolomite, within the weathering zone, and formation of chalcocite now largely oxidized to malachite and black Cu oxide minerals.

Recommended Concentration and two “Between Laboratory” Standard Deviations

Certified Concentrations (economic elements)

 

Co

(M/ICP)

97.4

±

10

ppm

Cu

(acidsol)

11.22

±

0.79

%

Cu

(F)

11.23

±

0.67

%

Cu

(M/ICP)

11.28

±

0.83

%

Cu

(P)

11.26

±

0.86

%

U

(M/ICP)

12.6

±

0.9

ppm

 

Provisional Concentration (economic elements)

 

Ni

(M/ICP)

87

±

14

ppm

 

Indicated Means

 

Au

(PbColl)

0.016

 

g/t

Cu

(XRF)

11.71

 

%

Zn

(M/ICP)

31

 

ppm

 

 

Certified Concentrations (major elements)

 

 

Al2O3

11.88

±

0.70

%

CaO

0.30

±

0.02

%

Fe2O3

6.48

±

0.40

%

K2O

2.61

±

0.14

%

LOI

11.9

±

1.1

%

MgO

0.67

±

0.06

%

SiO2

50.91

±

3.42

%

TiO2

0.83

±

0.04

%

 
Provisional Concentrations (major elements)

 

MnO

0.065

±

0.010

%

Na2O

0.72

±

0.08

%

P2O5

0.25

±

0.046

%

S

0.12

±

0.024

%

 
Indicated Mean (major elements)

 

Cr2O3

0.031

%

 

 

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