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Benoni meteorite, Benoni, Ekurhuleni District (East Rand), Gauteng, South Africai
Regional Level Types
Benoni meteoriteMeteorite Fall Location
Benoni- not defined -
Ekurhuleni District (East Rand)District
GautengProvince
South AfricaCountry

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Key
Lock Map
Latitude & Longitude (WGS84): 26° 10' South , 28° 25' East
Latitude & Longitude (decimal): -26.16667,28.41667
GeoHash:G#: kek5nss2h
Locality type:Meteorite Fall Location
Meteorite Class:H6 chondrite meteorite
Meteoritical Society Class:H6
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Cwb : Subtropical highland climate or temperate oceanic climate with dry winters


Ordinary chondrite, gas-rich (H6)
Fell, 25 July 1943, 17:35 hrs; 3.88 kg, single stone

A stone fell 55 paces from Mr. M. J. Groenewald in the Benoni area. The stone was partially covered with a fusion crust. Olivine (Fa~19) and low Ca-orthopyroxene (Fs~18) compositions are characteristic of the H-chondrite geochemical group. Mineralogically the meteorite consists primarily of dominant olivine and orthopyroxene along with minor amounts of Fe-Ni metal (kamacite and taenite) and troilite. Accessory chromite, copper, graphite, rutile, and minor sulfides are also reported.

A cosmic-ray exposure (CRE) age of ~9 Ma has been reported.

The H (relatively high in total iron) chondrites are the second largest group of ordinary chondrite falls and represent nearly 40% of well-classified and witnessed meteorite falls. As of late May 2017 was Benoni was one of the 94 meteorite falls classified exactly as 'H6' chondrites.

The main mass has been kept at the University of Witwatersand's Geological Museum.

Regions containing this locality

Transvaal, South Africa

Province (Former) - 838 mineral species & varietal names listed

Witwatersrand Gold Fields, South Africa

Mining Region - 278 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


11 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:

Chromite
Formula: Fe2+Cr3+2O4
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Copper
Formula: Cu
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
'Fayalite-Forsterite Series'
Description: Olivine (Fa18), preferred value in Catalogue of Meteorites (5/e), Olivine Composition typical of H chondrites [Normal Range: Fa17.3-20.2, following Rubin,1990]
Reference: Mason, B. (1962) The Classification of Chondritic Meteorites. American Museum Novitates, No. 2085. New York. 20 pp.; Mason, B. (1963) Olivine Composition in Chondrites: Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
Graphite
Formula: C
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
'H6 chondrite meteorite'
Reference: Meteoritical Society Database
Ilmenite
Formula: Fe2+TiO3
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
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.
Isocubanite
Formula: CuFe2S3
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Mackinawite
Formula: (Fe,Ni)9S8
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
'Orthopyroxene Subgroup'
Description: Composition of Orthopyroxene (Fs18) typical of H chondrites, Mason (1962).
Reference: Mason, B. (1962) The Classification of Chondritic Meteorites. American Museum Novitates, No. 2085. New York. 20 pp.
Rutile
Formula: TiO2
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Taenite
Formula: (Fe,Ni)
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Troilite
Formula: FeS
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Copper'1.AA.05Cu
'Graphite'1.CB.05aC
'Iron'1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
'Isocubanite'2.CB.55bCuFe2S3
Mackinawite2.CC.25(Fe,Ni)9S8
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
'Chromite'4.BB.05Fe2+Cr3+2O4
'Ilmenite'4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Rutile4.DB.05TiO2
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'H6 chondrite meteorite'-
Orthopyroxene Subgroup-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Taenite1.1.11.2(Fe,Ni)
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Mackinawite2.7.2.1(Fe,Ni)9S8
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 1:1
Isocubanite2.9.13.3CuFe2S3
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'H6 chondrite meteorite'-
Iron-Fe
'Orthopyroxene Subgroup'-

List of minerals for each chemical element

CCarbon
C GraphiteC
OOxygen
O ChromiteFe2+Cr23+O4
O IlmeniteFe2+TiO3
O MagnetiteFe2+Fe23+O4
O RutileTiO2
SSulfur
S IsocubaniteCuFe2S3
S Mackinawite(Fe,Ni)9S8
S TroiliteFeS
TiTitanium
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe ChromiteFe2+Cr23+O4
Fe IlmeniteFe2+TiO3
Fe IronFe
Fe IsocubaniteCuFe2S3
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Mackinawite(Fe,Ni)9S8
Fe MagnetiteFe2+Fe23+O4
Fe Taenite(Fe,Ni)
Fe TroiliteFeS
NiNickel
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Mackinawite(Fe,Ni)9S8
Ni Taenite(Fe,Ni)
CuCopper
Cu CopperCu
Cu IsocubaniteCuFe2S3

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

Jurassic - Permian
145 - 298.9 Ma



ID: 3309804

Age: Phanerozoic (145 - 298.9 Ma)

Lithology: Sedimentary (karoo)

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

Permian
251.902 - 298.9 Ma



ID: 2227918
Vryheid Formation of Ecca Group of Karoo Supergroup

Age: Phanerozoic (251.902 - 298.9 Ma)

Stratigraphic Name: Vryheid Formation

Description: Fine- to coarse-grained sandstone, shale, coal seams

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

Siderian
2300 - 2500 Ma



ID: 3185125
Paleoproterozoic sedimentary and volcanic rocks

Age: Siderian (2300 - 2500 Ma)

Lithology: Mafic-intermediate undivided volcanic 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]

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. (1962) The Classification of Chondritic Meteorites. American Museum Novitates, No. 2085. New York. 20 pp.
Mason, B. (1963) Olivine Composition in Chondrites: Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
Zähringer, J. (1968) Rare gases in stony meteorites: Geochimica et Cosmochimica Acta 32(2): 209-237.
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Graham, A.L., Bevan, A.W.R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Rubin, A.E. (1990) Olivine & Kamacite in Ordinary Chondrites: Intergroup and Intragroup relationships. Geochimica et Cosmochimica Acta 54: 1217-1230.
Graf, Th. & Marti K. (1995) Collisional history of H chondrites. J. Geophys. Res. (Planets) 100: 21247–21263. (Oct 1995).
Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.

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