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St. Mark's meteorite, Intsika Yethu Local Municipality, Chris Hani District Municipality, Eastern Cape, South Africai
Regional Level Types
St. Mark's meteoriteMeteorite Fall Location
Intsika Yethu Local MunicipalityMunicipality
Chris Hani District MunicipalityMunicipality
Eastern CapeProvince
South AfricaCountry

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Latitude & Longitude (WGS84):
32° 1' South , 27° 25' East
Latitude & Longitude (decimal):
-32.01667,27.41667
GeoHash:
G#:kd73zgs1q
GRN:
S22E17
Type:
Meteorite Fall Location
Meteorite Class:
EH5 chondrite meteorite
Meteoritical Society Class:
EH5
Metbull:
View entry in Meteoritical Bulletin Database
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Ilinge10,899(2018)35.5km
Lady Frere25,041(2012)38.9km
Queensdale20,009(2018)44.4km
Mindat Locality ID:
57013
Long-form identifier:
mindat:1:2:57013:1
GUID (UUID V4):
319ac840-94ed-4e7c-92fb-dca6ca82aa50


Enstatite Chondrite, high-iron [EH5; S3]
Fall, 3 January 1903, 13.8 kg

At 11 P.M. a brite bolide was seen, four detonations were heard, and a 13.78 kg stone was seen to fall near St. Mark’s mission Station in the Transakei region. St. Mark's is now classified as an EH4 Enstatite Chondrite. Enstatite Chondrite are distinguished by their bulk chemistry, unusually earth-like oxygen isotope ratios, abundant Enstatite (an iron-free pyroxene) and several other unusual highly reduced mineral assemblages. The high-iron (EH) chemical group is further distinguished by small chondrules, metal (~10 vol%) and the invariable presence of niningerite (MgS) and perryite (a silicide). The petrologic type EH4 chondrites are characterized by abundant chondrules, homogenized olivine and recrystallized fine-grained matrix.
St. Mark’s has also experienced significant pre-terrestrial shock (Shock Stage S3)

Select Mineral List Type

StandardDetailedGalleryStrunzChemical Elements

Mineral List


15 valid minerals. 1(TL) - type locality of valid minerals.

Meteorite/Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical ListTree Diagram

Detailed Mineral List:

ⓘAlabandite
Formula:MnS
ⓘCohenite
Formula:Fe3C
ⓘCubanite
Formula:CuFe2S3
ⓘDaubréelite
Formula:Fe2+Cr3+2S4
ⓘDjerfisherite (TL)
Formula:K6(Fe,Cu,Ni)25S26Cl
Type Locality:
ⓘEnstatite
Formula:Mg2Si2O6
ⓘGraphite
Formula:C
ⓘIron
Formula:Fe
ⓘIron var. Kamacite
Formula:(Fe,Ni)
ⓘNiningerite
Formula:(Mg,Fe2+,Mn2+)S
ⓘOldhamite
Formula:(Ca,Mg)S
ⓘPerryite
Formula:(Ni,Fe)5(Si,P)2
ⓘ'Plagioclase'
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Description: Albitic [An 14]
ⓘQuartz
Formula:SiO2
ⓘSchreibersite
Formula:(Fe,Ni)3P
ⓘSphalerite
Formula:ZnS
ⓘTroilite
Formula:FeS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘIron1.AE.05Fe
ⓘvar. Kamacite1.AE.05(Fe,Ni)
ⓘCohenite1.BA.05Fe3C
ⓘPerryite1.BB.10(Ni,Fe)5(Si,P)2
ⓘSchreibersite1.BD.05(Fe,Ni)3P
ⓘGraphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘCubanite2.CB.55aCuFe2S3
ⓘTroilite2.CC.10FeS
ⓘAlabandite2.CD.10MnS
ⓘNiningerite2.CD.10(Mg,Fe2+,Mn2+)S
ⓘOldhamite2.CD.10(Ca,Mg)S
ⓘDaubréelite2.DA.05Fe2+Cr3+2S4
ⓘDjerfisherite (TL)2.FC.05K6(Fe,Cu,Ni)25S26Cl
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘEnstatite9.DA.05Mg2Si2O6
Unclassified
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

CCarbon
CⓘCoheniteFe3C
CⓘGraphiteC
OOxygen
OⓘEnstatiteMg2Si2O6
OⓘQuartzSiO2
OⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
NaSodium
NaⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
MgⓘEnstatiteMg2Si2O6
MgⓘNiningerite(Mg,Fe2+,Mn2+)S
MgⓘOldhamite(Ca,Mg)S
AlAluminium
AlⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
SiⓘEnstatiteMg2Si2O6
SiⓘPerryite(Ni,Fe)5(Si,P)2
SiⓘQuartzSiO2
SiⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
PⓘPerryite(Ni,Fe)5(Si,P)2
PⓘSchreibersite(Fe,Ni)3P
SSulfur
SⓘAlabanditeMnS
SⓘCubaniteCuFe2S3
SⓘDaubréeliteFe2+Cr23+S4
SⓘDjerfisheriteK6(Fe,Cu,Ni)25S26Cl
SⓘNiningerite(Mg,Fe2+,Mn2+)S
SⓘOldhamite(Ca,Mg)S
SⓘSphaleriteZnS
SⓘTroiliteFeS
ClChlorine
ClⓘDjerfisheriteK6(Fe,Cu,Ni)25S26Cl
KPotassium
KⓘDjerfisheriteK6(Fe,Cu,Ni)25S26Cl
CaCalcium
CaⓘOldhamite(Ca,Mg)S
CaⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
CrChromium
CrⓘDaubréeliteFe2+Cr23+S4
MnManganese
MnⓘAlabanditeMnS
MnⓘNiningerite(Mg,Fe2+,Mn2+)S
FeIron
FeⓘCoheniteFe3C
FeⓘCubaniteCuFe2S3
FeⓘDaubréeliteFe2+Cr23+S4
FeⓘDjerfisheriteK6(Fe,Cu,Ni)25S26Cl
FeⓘIronFe
FeⓘIron var.Kamacite(Fe,Ni)
FeⓘNiningerite(Mg,Fe2+,Mn2+)S
FeⓘPerryite(Ni,Fe)5(Si,P)2
FeⓘSchreibersite(Fe,Ni)3P
FeⓘTroiliteFeS
NiNickel
NiⓘDjerfisheriteK6(Fe,Cu,Ni)25S26Cl
NiⓘIron var.Kamacite(Fe,Ni)
NiⓘPerryite(Ni,Fe)5(Si,P)2
NiⓘSchreibersite(Fe,Ni)3P
CuCopper
CuⓘCubaniteCuFe2S3
CuⓘDjerfisheriteK6(Fe,Cu,Ni)25S26Cl
ZnZinc
ZnⓘSphaleriteZnS

Other Regions, Features and Areas containing this locality

African PlateTectonic Plate
African Plate
South Africa

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, pleaseregister so you can add to our database. This locality information is for reference purposes only. You should never attempt tovisit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holdersfor access and that you are aware of all safety precautions necessary.

References

Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30.
Fuchs, L. H. (1966) Djerfisherite, Alkali Copper-Iron Sulfide: A New Mineral from Enstatite Chondrites.Science, 153 (3732). 166-167doi:10.1126/science.153.3732.166
Keil, K., Snetsinger, K.G., (1966) Niningerite: a new meteoritic sulfide. Science: 155: 451-453.
Ramdohr, Paul (1972)The Opaque Minerals in Stony Meteorites. De Gruyter.doi:10.1515/9783112651025
LEITCH, C.A. & SMITH, J.V. (1982): Petrography, mineral chemistry and origin of Type I enstatite chondrites. Geochimica et Cosmochimica Acta 46, 2083-2097.
Brearley, A.J., Jones, R.H. (1998) Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA.
Grady, Monica (2000)Catalogue of Meteorites (5th ed.). Cambridge University Press.
Shimizu, M., Yoshida, H., Mandarino, J. A. (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite.The Canadian Mineralogist, 40 (6) 1687-1692doi:10.2113/gscanmin.40.6.1687
Busemann, H., Baur, H., Weiler, R. (2002) On Line Etching of Bulk EH5 St. Mark’S - Radiogenic and Subsolar Noble Gases.65th Annual Meteoritical Society Meeting.
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