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Insizwa, Umzimvubu Local Municipality, Alfred Nzo District Municipality, Eastern Cape, South Africai
Regional Level Types
InsizwaLobe
Umzimvubu Local MunicipalityMunicipality
Alfred Nzo District MunicipalityMunicipality
Eastern CapeProvince
South AfricaCountry

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Latitude & Longitude (WGS84):
30° 43' 0'' South , 29° 17' 58'' East
Latitude & Longitude (decimal):
-30.71667,29.29972
GeoHash:
G#: kdsc68pqm
GRN:
S21E18
Type:
Lobe
KΓΆppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Kokstad25,373 (2012)22.3km
Mindat Locality ID:
3075
Long-form identifier:
mindat:1:2:3075:8
GUID (UUID V4):
28d47271-c2c0-45e7-bee8-6bfec2c840fe
Other/historical names associated with this locality:
Insizwa Complex; Insizwa Range; MAC
Name(s) in local language(s):
Ntsizwa


Layered mafic sill 25 km in diameter and 1000 m thick.

A number of doleritic and gabbroic intrusive sheets occur in the northern Eastern Cape Province. One of the more extensive of these is the Insizwa-Ingeli-Tonti-Tabankulu intrusion, which occurs 175 kilometres southwest of Durban. Picrite and troctolite dominate the basal zone, hypersthene gabbro the central zone, and quartz diorite and quartz monzonite the upper zone. Chalcopyrite, pentlandite and pyrrhotite grains occur in the picrite as well as in cross-cutting veins and sheets of massive sulphide in association with the acid phases. The sulphide mineralisation is confined to the lower contact of the intrusive gabbroic sill and it is generally accepted that the two are genetically related. Nickel sulphides were originally found at Waterfall Gorge as early as 1865 by Rudlin. Insizwa is known for its assemblage of platinum group minerals, of which insizwaite (PtBi2), niggliite (PtSn) and parkerite (Ni3(Bi,Pb)2S2) were first described from here and several remain unnamed. Sperrylite is relatively common in the massive ore, where it occurs as well-formed crystals up to 0.2mm in length in contact with pyrrhotite, cubanite and parkerite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

32 valid minerals. 3 (TL) - type locality of valid minerals.

Detailed Mineral List:

β“˜ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
β“˜ Auricupride ?
Formula: Cu3Au
β“˜ Bismuth
Formula: Bi
β“˜ Bismuthinite
Formula: Bi2S3
β“˜ Bornite
Formula: Cu5FeS4
β“˜ Braggite
Formula: PdPt3S4
β“˜ Chalcocite
Formula: Cu2S
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ Chromite
Formula: Fe2+Cr3+2O4
β“˜ Cooperite
Formula: PtS
β“˜ Covellite
Formula: CuS
β“˜ Cubanite
Formula: CuFe2S3
β“˜ Enstatite
Formula: Mg2Si2O6
β“˜ Enstatite var. Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
β“˜ 'Fayalite-Forsterite Series'
β“˜ Forsterite
Formula: Mg2SiO4
β“˜ Froodite
Formula: α-PdBi2
β“˜ Galena
Formula: PbS
β“˜ Ilmenite
Formula: Fe2+TiO3
β“˜ Insizwaite (TL)
Formula: Pt(Bi,Sb)2
Type Locality:
β“˜ Irarsite
Formula: (Ir,Ru,Rh,Pt)AsS
β“˜ Laurite
Formula: RuS2
β“˜ 'Lead-parkerite'
Formula: Ni3Pb2S2
β“˜ Mackinawite
Formula: FeS
β“˜ Millerite
Formula: NiS
β“˜ Nickeline
Formula: NiAs
β“˜ Niggliite (TL)
Formula: PtSn
Type Locality:
β“˜ Parkerite (TL)
Formula: Ni3(Bi,Pb)2S2
Type Locality:
β“˜ Pentlandite
Formula: (NixFey)Ξ£9S8
β“˜ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
β“˜ Pyrite
Formula: FeS2
β“˜ Pyrite var. Bravoite
Formula: (Fe,Ni)S2
β“˜ Pyrrhotite
Formula: Fe1-xS
β“˜ Sperrylite
Formula: PtAs2
β“˜ Sphalerite
Formula: ZnS
β“˜ Valleriite
Formula: (Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
β“˜ Wollastonite
Formula: Ca3(Si3O9)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Auricupride ?1.AA.10aCu3Au
β“˜Niggliite (TL)1.AG.60PtSn
β“˜Bismuth1.CA.05Bi
Group 2 - Sulphides and Sulfosalts
β“˜Froodite2.AC.45aΞ±-PdBi2
β“˜Chalcocite2.BA.05Cu2S
β“˜Bornite2.BA.15Cu5FeS4
β“˜Pentlandite2.BB.15(NixFey)Ξ£9S8
β“˜Parkerite (TL)2.BE.20Ni3(Bi,Pb)2S2
β“˜Covellite2.CA.05aCuS
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Cubanite2.CB.55aCuFe2S3
β“˜Nickeline2.CC.05NiAs
β“˜Pyrrhotite2.CC.10Fe1-xS
β“˜Millerite2.CC.20NiS
β“˜Mackinawite2.CC.25FeS
β“˜Braggite2.CC.35aPdPt3S4
β“˜Cooperite2.CC.35bPtS
β“˜Galena2.CD.10PbS
β“˜Bismuthinite2.DB.05Bi2S3
β“˜Pyrite
var. Bravoite		2.EB.05a(Fe,Ni)S2
β“˜Laurite2.EB.05aRuS2
β“˜Pyrite2.EB.05aFeS2
β“˜Sperrylite2.EB.05aPtAs2
β“˜Insizwaite (TL)2.EB.05aPt(Bi,Sb)2
β“˜Irarsite2.EB.25(Ir,Ru,Rh,Pt)AsS
β“˜Valleriite2.FD.30(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
Group 4 - Oxides and Hydroxides
β“˜Chromite4.BB.05Fe2+Cr3+2O4
β“˜Ilmenite4.CB.05Fe2+TiO3
Group 9 - Silicates
β“˜Forsterite9.AC.05Mg2SiO4
β“˜Enstatite
var. Bronzite		9.DA.05(Mg,Fe2+)2[SiO3]2
β“˜9.DA.05Mg2Si2O6
β“˜Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
β“˜Wollastonite9.DG.05Ca3(Si3O9)
Unclassified
β“˜'Lead-parkerite'-Ni3Pb2S2
β“˜'Fayalite-Forsterite Series'-
β“˜'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

HHydrogen
Hβ“˜ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
OOxygen
Oβ“˜ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oβ“˜ ChromiteFe2+Cr23+O4
Oβ“˜ EnstatiteMg2Si2O6
Oβ“˜ ForsteriteMg2SiO4
Oβ“˜ IlmeniteFe2+TiO3
Oβ“˜ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
Oβ“˜ WollastoniteCa3(Si3O9)
Oβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Oβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
NaSodium
Naβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgβ“˜ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgβ“˜ EnstatiteMg2Si2O6
Mgβ“˜ ForsteriteMg2SiO4
Mgβ“˜ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
Mgβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
AlAluminium
Alβ“˜ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
Alβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siβ“˜ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siβ“˜ EnstatiteMg2Si2O6
Siβ“˜ ForsteriteMg2SiO4
Siβ“˜ WollastoniteCa3(Si3O9)
Siβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Siβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SSulfur
Sβ“˜ BismuthiniteBi2S3
Sβ“˜ BorniteCu5FeS4
Sβ“˜ BraggitePdPt3S4
Sβ“˜ Pyrite var. Bravoite(Fe,Ni)S2
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ ChalcociteCu2S
Sβ“˜ CooperitePtS
Sβ“˜ CovelliteCuS
Sβ“˜ CubaniteCuFe2S3
Sβ“˜ GalenaPbS
Sβ“˜ Irarsite(Ir,Ru,Rh,Pt)AsS
Sβ“˜ LauriteRuS2
Sβ“˜ Lead-parkeriteNi3Pb2S2
Sβ“˜ MackinawiteFeS
Sβ“˜ MilleriteNiS
Sβ“˜ ParkeriteNi3(Bi,Pb)2S2
Sβ“˜ Pentlandite(NixFey)Ξ£9S8
Sβ“˜ PyriteFeS2
Sβ“˜ PyrrhotiteFe1-xS
Sβ“˜ SphaleriteZnS
Sβ“˜ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
CaCalcium
Caβ“˜ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caβ“˜ WollastoniteCa3(Si3O9)
Caβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiβ“˜ IlmeniteFe2+TiO3
CrChromium
Crβ“˜ ChromiteFe2+Cr23+O4
FeIron
Feβ“˜ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feβ“˜ BorniteCu5FeS4
Feβ“˜ Pyrite var. Bravoite(Fe,Ni)S2
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ ChromiteFe2+Cr23+O4
Feβ“˜ CubaniteCuFe2S3
Feβ“˜ IlmeniteFe2+TiO3
Feβ“˜ MackinawiteFeS
Feβ“˜ Pentlandite(NixFey)Ξ£9S8
Feβ“˜ PyriteFeS2
Feβ“˜ PyrrhotiteFe1-xS
Feβ“˜ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
Feβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
NiNickel
Niβ“˜ Pyrite var. Bravoite(Fe,Ni)S2
Niβ“˜ Lead-parkeriteNi3Pb2S2
Niβ“˜ MilleriteNiS
Niβ“˜ NickelineNiAs
Niβ“˜ ParkeriteNi3(Bi,Pb)2S2
Niβ“˜ Pentlandite(NixFey)Ξ£9S8
CuCopper
Cuβ“˜ AuricuprideCu3Au
Cuβ“˜ BorniteCu5FeS4
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ ChalcociteCu2S
Cuβ“˜ CovelliteCuS
Cuβ“˜ CubaniteCuFe2S3
Cuβ“˜ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
ZnZinc
Znβ“˜ SphaleriteZnS
AsArsenic
Asβ“˜ Irarsite(Ir,Ru,Rh,Pt)AsS
Asβ“˜ NickelineNiAs
Asβ“˜ SperrylitePtAs2
RuRuthenium
Ruβ“˜ Irarsite(Ir,Ru,Rh,Pt)AsS
Ruβ“˜ LauriteRuS2
RhRhodium
Rhβ“˜ Irarsite(Ir,Ru,Rh,Pt)AsS
PdPalladium
Pdβ“˜ BraggitePdPt3S4
Pdβ“˜ Frooditeα-PdBi2
SnTin
Snβ“˜ NiggliitePtSn
SbAntimony
Sbβ“˜ InsizwaitePt(Bi,Sb)2
IrIridium
Irβ“˜ Irarsite(Ir,Ru,Rh,Pt)AsS
PtPlatinum
Ptβ“˜ BraggitePdPt3S4
Ptβ“˜ CooperitePtS
Ptβ“˜ InsizwaitePt(Bi,Sb)2
Ptβ“˜ Irarsite(Ir,Ru,Rh,Pt)AsS
Ptβ“˜ NiggliitePtSn
Ptβ“˜ SperrylitePtAs2
AuGold
Auβ“˜ AuricuprideCu3Au
PbLead
Pbβ“˜ GalenaPbS
Pbβ“˜ Lead-parkeriteNi3Pb2S2
Pbβ“˜ ParkeriteNi3(Bi,Pb)2S2
BiBismuth
Biβ“˜ BismuthBi
Biβ“˜ BismuthiniteBi2S3
Biβ“˜ Frooditeα-PdBi2
Biβ“˜ InsizwaitePt(Bi,Sb)2
Biβ“˜ ParkeriteNi3(Bi,Pb)2S2

Localities in this Region

South Africa
  • Eastern Cape
    • Alfred Nzo District Municipality

Other Regions, Features and Areas containing this locality

African Plate
Somali PlateTectonic Plate

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.getamap.net (n.d.) http://www.getamap.net/maps/south_africa/eastern_cape/_insizwa/
www.getamap.net (n.d.) http://www.getamap.net/maps/south_africa/eastern_cape/_insizwamine/
Du Toit, A.L. (1910) Copper-nickel deposits of the Insizwa, Mount Ayliff, East Griqualand. Fifteenth Annual report of the Geological Commission, Cape of Good Hope, Cape Town, South Africa, 111-142.
Rose, J.G., (1911) The Insizwa copper nickel deposits. South African Journal of Science, 129-130.
Scholtz, D.L., (1936) The magmatic nickeliferous ore deposits of east Griqualand and Pondoland. Transactions of the Geological Society of South Africa, 39, 81-209.
Du Preez, J.W. (1944) Ann. Univ. Stellenbosch, 22, sect. A, p. 101.
Bruynzeel, D. (1956) A petrographic study of the Waterfall Gorge profile at Insizwa. Annals of the University of Stellenbosch, South Africa, 33A (10), 481-534.
Cabri, L.J. and Harris, D.C., (1972) The new mineral insizwaite (PtBi2) and new data on niggliite (PtSn). Mineralogical Magazine, 38, 794-800.
Tischler, S.E., Cawthorn, R.G., Kingston, G.A. and Maske, S., (1981) Magmatic Cu Ni PGE mineralization at Waterfall Gorge, Insizwa, Pondoland, Transkei. Canadian Mineralogist, 19, 607-618.
Lightfoot, P.C. and Naldrett, A.J., (1983) The geology of the Tabankulu section of the Insizwa Complex, Transkei, southern Africa, with reference to the nickel sulphide potential. Transactions of the Geological Society of South Africa, 86(3), 169-188.
Lightfoot, P.C., Naldrett, A.J. and Hawkesworth, C.J., (1984) The geology and geochemistry of the Waterfall Gorge section of the Insizwa complex with particular reference to the origin of the nickel sulfide deposits. Economic Geology, 79, 1857- 1879.
Maske, S. and Cawthorn, R.G., (1986) The nickel occurrence in the Insizwa Complex, Transkei. In: Anhaeusser, C.R. and Maske, S., (Eds.). Mineral Deposits of Southern Africa, Vols I & II, Geological Society of South Africa, Johannesburg, 2149-2158.
Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa, Linden .
FerrΓ©, E.C., Bordarier, C., Marsh, J.S. (2002) Magma flow inferred from AMS fabrics in a layered mafic sill, Insizwa, South Africa. Tectonophysics, 354(1), 1-23.
Maier, W. D., Marsh, J. S., Barnes, S. J., & Dodd, D. C. (2002). The distribution of platinum group elements in the Insizwa lobe, Mount Ayliff Complex, South Africa: implications for Ni-Cu-PGE sulfide exploration in the Karoo igneous province. Economic Geology, 97(6), 1293-1306.
Marsh J.S., Allen P., Fenner, N. (2003) The geochemical structure of the Insizwa lobe of the Mount Ayliff complex with implications for the emplacement and evolution of the complex and its Ni-sulphide potential. South African Journal of Geology, 106(4), 409-428.
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