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Kalahari Goldridge Mine (Kalgold Mine), Ratlou Local Municipality, Ngaka Modiri Molema District Municipality, North West, South Africa i
Regional Level Types
Kalahari Goldridge Mine (Kalgold Mine) Mine
Ratlou Local Municipality Municipality
Ngaka Modiri Molema District Municipality District
North West Province
South Africa Country

Regional Level Types
Kalahari Goldridge Mine (Kalgold Mine)	Mine
Ratlou Local Municipality	Municipality
Ngaka Modiri Molema District Municipality	District
North West	Province
South Africa	Country

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Predictive Mineralogy

Latitude & Longitude (WGS84):

26° 9' 17'' South , 25° 14' 9'' East

Latitude & Longitude (decimal):

Type:

Köppen climate type:

BSh : Hot semi-arid (steppe) climate

Nearest Settlements:

Place	Population	Distance
Mahikeng	14,000 (2013)	51.9km
Mmabatho	76,754 (2018)	52.2km

Owned/operated by:

Harmony Gold (100%)

Mindat Locality ID:

54071

Long-form identifier:

mindat:1:2:54071:4

GUID (UUID V4):

Open pit gold mine, developed in the 1990s, and operated by Harmony Gold Mining Company.
Located 55 km SW of Mafikeng.

Stratabound ore body hosted by BIF (banded iron formation), and located within the Archaean Kraaipan Greenstone Belt.

The Kalgold, which is the only operational mine, has produced ∼ 34 t Au.
In 2023, the Kalgold mine reported 73.6 Mt of ore resource tonnages at 0.85 g/t Au (∼62.56 t) and gold reserves of 13.9 Mt at 0.88 g/t Au (∼12.2 t)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Gold

Mineral List

16 valid minerals.

Detailed Mineral List:

ⓘ Actinolite

Formula: ◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂

References:

Hammond, Napoleon Q., Moore, John M. (2006) Archaean lode gold mineralisation in banded iron formation at the Kalahari Goldridge deposit, Kraaipan Greenstone Belt, South Africa. Mineralium Deposita, 41 (5) 483-503 doi:10.1007/s00126-006-0074-6

ⓘ Ankerite

Formula: Ca(Fe²⁺,Mg)(CO₃)₂

References:

Morishita, Yuichi, Hammond, Napoleon Q., Momii, Kazunori, Konagaya, Rimi, Sano, Yuji, Takahata, Naoto, Ueno, Hirotomo (2019) Invisible Gold in Pyrite from Epithermal, Banded-Iron-Formation-Hosted, and Sedimentary Gold Deposits: Evidence of Hydrothermal Influence. Minerals, 9 (7) 447 doi:10.3390/min9070447

ⓘ Calcite

Formula: CaCO₃

References:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

ⓘ 'Chlorite Group'

References:

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

References:

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

ⓘ Minnesotaite

Formula: Fe²⁺₃Si₄O₁₀(OH)₂

References:

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

ⓘ Muscovite var. Sericite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

ⓘ Native Bismuth

Formula: Bi

References:

ⓘ Native Gold

Formula: Au

References:

www.harmony.co.za (n.d.) http://www.harmony.co.za/our-business/our-operations/kalgold-open-pit

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

ⓘ Pyrite

Formula: FeS₂

References:

ⓘ Pyrrhotite

Formula: Fe_1-xS

References:

ⓘ Quartz

Formula: SiO₂

References:

ⓘ Siderite

Formula: FeCO₃

References:

ⓘ Stilpnomelane

Formula: K₄Fe²⁺₄₈[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Gold	1.AA.05	Au
ⓘ	Native Bismuth	1.CA.05	Bi
Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Siderite	5.AB.05	FeCO₃
ⓘ	Ankerite	5.AB.10	Ca(Fe²⁺,Mg)(CO₃)₂
Group 9 - Silicates
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Actinolite	9.DE.10	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
ⓘ	Minnesotaite	9.EC.05	Fe²⁺₃Si₄O₁₀(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Sericite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Stilpnomelane	9.EG.40	K₄Fe²⁺₄₈[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O
Unclassified
ⓘ	'Chlorite Group'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Minnesotaite	Fe₃²⁺Si₄O₁₀(OH)₂
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Stilpnomelane	K₄Fe₄₈²⁺[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O
H	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
C	Carbon
C	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
C	ⓘ Calcite	CaCO₃
C	ⓘ Siderite	FeCO₃
O	Oxygen
O	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
O	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Minnesotaite	Fe₃²⁺Si₄O₁₀(OH)₂
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Siderite	FeCO₃
O	ⓘ Stilpnomelane	K₄Fe₄₈²⁺[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O
O	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Na	Sodium
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Mg	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Al	Aluminium
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Stilpnomelane	K₄Fe₄₈²⁺[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O
Al	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Minnesotaite	Fe₃²⁺Si₄O₁₀(OH)₂
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Stilpnomelane	K₄Fe₄₈²⁺[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O
Si	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Pyrite	FeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
K	Potassium
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Stilpnomelane	K₄Fe₄₈²⁺[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O
K	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Ca	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	Iron
Fe	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Fe	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Minnesotaite	Fe₃²⁺Si₄O₁₀(OH)₂
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Fe	ⓘ Siderite	FeCO₃
Fe	ⓘ Stilpnomelane	K₄Fe₄₈²⁺[Si₆₄Al₈]O₁₆₄(OH)₅₂ · nH₂O
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Au	Gold
Au	ⓘ Native Gold	Au
Bi	Bismuth
Bi	ⓘ Native Bismuth	Bi

Other Regions, Features and Areas containing this locality

AfricaContinent

African PlateTectonic Plate

Kalahari Craton
- Kaapvaal CratonCraton

South Africa

North West
- Ngaka Modiri Molema District Municipality
  - Kraaipan greenstone beltGreenstone Belt

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

www.harmony.co.za (n.d.) http://www.harmony.co.za/our-business/our-operations/kalgold-open-pit

[1]Mutele, Litshedzani, Carranza, Emmanuel John M. (2025) Assessment of gold endowment and exploration maturity in selected South African goldfields using Zipf’s law, deposit density regression, and the USGS three-part quantitative mineral resource assessment: Toward sustaining gold production. Ore Geology Reviews, 179. 106513 doi:10.1016/j.oregeorev.2025.106513

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