ALMOST THERE!. Help us with a final push needed to keep mindat.org running. Click here to help.
Catawiki are hosting a mindat.org benefit auction. All proceeds to mindat.org! BID NOW
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

St. Mark's meteorite, Chris Hani District, Eastern Cape, South Africai
Regional Level Types
St. Mark's meteoriteMeteorite Fall Location
Chris Hani DistrictDistrict
Eastern CapeProvince
South AfricaCountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Latitude & Longitude (WGS84): 32° 1' South , 27° 25' East
Latitude & Longitude (decimal): -32.01667,27.41667
GeoHash:G#: kd73zgs1q
Locality 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


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

Standard Detailed Strunz Dana Chemical Elements

Mineral List


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

Meteorite/Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Alabandite
Formula: MnS
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
'Albite-Anorthite Series'
Description: Albitic [An 14]
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Cohenite
Formula: Fe3C
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Cubanite
Formula: CuFe2S3
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Daubréelite
Formula: Fe2+Cr3+2S4
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Djerfisherite (TL)
Formula: K6(Fe,Cu,Ni)25S26Cl
Type Locality:
Reference: Minerals of South Africa; Daltry, V.D.C., (1997) Mineralogy of South Africa: Type-Mineral Species and Type-Mineral Names, Council For Geoscience, Geological Survey of South Africa, Handbook 15.
'EH5 chondrite meteorite'
Reference: Meteoritical Society Database
Enstatite
Formula: MgSiO3
Reference: Minerals of South Africa
Graphite
Formula: C
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Iron
Formula: Fe
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Niningerite
Formula: (Mg,Fe2+,Mn2+)S
Reference: Minerals of South Africa
Oldhamite
Formula: (Ca,Mg)S
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Perryite
Formula: (Ni,Fe)5(Si,P)2
Reference: Minerals of South Africa
Quartz
Formula: SiO2
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Schreibersite
Formula: (Fe,Ni)3P
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Sphalerite
Formula: ZnS
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966) ; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Troilite
Formula: FeS
Reference: Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Cohenite'1.BA.05Fe3C
'Graphite'1.CB.05aC
'Iron'1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Perryite1.BB.10(Ni,Fe)5(Si,P)2
Schreibersite1.BD.05(Fe,Ni)3P
Group 2 - Sulphides and Sulfosalts
'Alabandite'2.CD.10MnS
'Cubanite'2.CB.55aCuFe2S3
'Daubréelite'2.DA.05Fe2+Cr3+2S4
'Djerfisherite' (TL)2.FC.05K6(Fe,Cu,Ni)25S26Cl
Niningerite2.CD.10(Mg,Fe2+,Mn2+)S
Oldhamite2.CD.10(Ca,Mg)S
Sphalerite2.CB.05aZnS
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
'Enstatite'9.DA.05MgSiO3
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'EH5 chondrite meteorite'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Cohenite1.1.16.1Fe3C
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Perryite1.1.22.1(Ni,Fe)5(Si,P)2
Schreibersite1.1.21.2(Fe,Ni)3P
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Alabandite2.8.1.4MnS
Sphalerite2.8.2.1ZnS
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 1:1
Cubanite2.9.13.1CuFe2S3
AmBnXp, with (m+n):p = 3:4
Daubréelite2.10.1.11Fe2+Cr3+2S4
Chlor-sulfides
Djerfisherite (TL)2.15.2.1K6(Fe,Cu,Ni)25S26Cl
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Enstatite65.1.2.1MgSiO3
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'EH5 chondrite meteorite'-
Iron-Fe
Niningerite-(Mg,Fe2+,Mn2+)S
Oldhamite-(Ca,Mg)S

List of minerals for each chemical element

CCarbon
C CoheniteFe3C
C GraphiteC
OOxygen
O EnstatiteMgSiO3
O QuartzSiO2
MgMagnesium
Mg EnstatiteMgSiO3
Mg Niningerite(Mg,Fe2+,Mn2+)S
Mg Oldhamite(Ca,Mg)S
SiSilicon
Si EnstatiteMgSiO3
Si Perryite(Ni,Fe)5(Si,P)2
Si QuartzSiO2
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
CrChromium
Cr DaubréeliteFe2+Cr23+S4
MnManganese
Mn AlabanditeMnS
FeIron
Fe CoheniteFe3C
Fe CubaniteCuFe2S3
Fe DaubréeliteFe2+Cr23+S4
Fe DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
Fe IronFe
Fe Iron (var: Kamacite)(Fe,Ni)
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

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Triassic
201.3 - 251.902 Ma



ID: 3306672

Age: Triassic (201.3 - 251.902 Ma)

Lithology: Sedimentary

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Triassic
201.3 - 251.902 Ma



ID: 3186759
Mesozoic sedimentary rocks

Age: Triassic (201.3 - 251.902 Ma)

Stratigraphic Name: Karoo Supergroup

Comments: Karoo Basin

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Triassic
201.3 - 251.902 Ma



ID: 2228221
Tarkastad Subgroup of Beaufort Group of Karoo Supergroup

Age: Triassic (201.3 - 251.902 Ma)

Stratigraphic Name: Tarkastad Subgroup

Description: Red and greenish-grey mudstone, fine- to medium-grained sandstone

Reference: Council for Geoscience. Geologic map of South Africa, 1:1M. National Science Councils of South Africa. [41]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Keil, K.,& Snetsinger, K.G., (1966) Niningerite: a new meteoritic sulfide. Science 155, 451-453.
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
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, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
Shimizu, M., Yoshida, H., & Mandarino, J.A., (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite. Canadian Mineralogist 40, 1687-1992.

External Links



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.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 16, 2018 06:37:24 Page generated: November 29, 2018 08:49:57
Go to top of page