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Chinguetti meteorite, Chinguetti, Adrar Region, Mauritaniai
Regional Level Types
Chinguetti meteoriteMeteorite Fall Location
Chinguetti- not defined -
Adrar RegionRegion
MauritaniaCountry

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Key
Latitude & Longitude (WGS84):
20° 15' North , 12° 41' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Chingueṭṭi4,711 (2017)41.0km
Atar24,021 (2016)48.3km


Stony-iron, Mesosiderite
Find, 1920; 4.05 kg

Reports of an enormous mass circulated, but only a single mass was ever recovered. A few suggestive droplets of black fused silica were also reported to have been found at the base of a large sandstone hillock where the mass was found. The mass — a flat parallelepiped with a 16x9.5 cm face — consists primarily of Fe-Ni metal (~80 wt%) with a multitude of tiny stone inclusions. A few larger silicate fragments (≤4 cm) are also found. A 1982 modal analysis gave the following (volumetric) breakdown: Pyroxene (42%), Kamacite (39%), Troilite (14%), Plagioclase (3%), Merrillite (<2%) & Tridymite (~0.5%). Kamacite dominates the pervasive Widmanstätten network and envelops the silicates ['swathing' kamacite]. Interstitial troilite is concentrated along metal-silicate joins. Minor amounts of magnesian olivine (Fo75), often surrounded by Fe-enriched coronas, are also present. The silicates, both large and small, are irregularly distributed. A few minor and trace phases have been identified as well.

A cosmic ray age of 66±7 Ma and terrestrial exposure age of 18±1 ka suggest that Chinguetti (1) may have been part of a major mesosiderite collisional break-up 60-70 million years ago and (2) that the radius of the preterrestrial meteoroid was ≤ 80 cm just prior to its impact.

Chinguetti has been classified as a Mesosiderites-B1 (moderate plagioclase abundance; unmetamorphosed, fine-grained matrix). Chinguetti is one of 4 Mesosiderite in the mesosiderite B1 subgroup. [Only a relatively small number (~40) of mesosiderites have been fully classified.] The main mass (3.9 kg) is with the Muséum National d'Histoire Naturelle (Paris). A smaller mass (380 g) is at U.S. National Museum in Washington.

Those who can read French may be interested in the book by Monod & Zanda (1992).

Regions containing this locality

African PlateTectonic Plate
Sahara Desert, North AfricaDesert
West AfricaUN Subregion
Northwest Africa MeteoritesMeteorite Fall Location

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 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:

'Albite-Anorthite Series'
Reference: Floran, R. J. (1978) Silicate petrography, classification, and origin of the mesosiderites - Review and new observations. In: Lunar and Planetary Science Conference, Proceedings XI. Vol. 1, 1053-1081 :New York, Pergamon Press, Inc.; Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J. [Ed.]): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA.
Chromite
Formula: Fe2+Cr3+2O4
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.; Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J. [Ed.]): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA.
'Fayalite-Forsterite Series'
Reference: Floran, R. J. (1978) Silicate petrography, classification, and origin of the mesosiderites - Review and new observations. In: Lunar and Planetary Science Conference, Proceedings XI. Vol. 1, 1053-1081 :New York, Pergamon Press, Inc.; Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J. [Ed.]): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA.
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: Lapaz, L. & Lapaz, J. (1954)The Adrar (=Chinguetti), Mauritania, French West Africa, Meteorite (CN=0127,202): Meteoritics 1(2):187-196.; 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: Lapaz, L. & Lapaz, J. (1954)The Adrar (=Chinguetti), Mauritania, French West Africa, Meteorite (CN=0127,202): Meteoritics 1(2):187-196.; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Merrillite
Formula: Ca9NaMg(PO4)7
Reference: Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J. [Ed.]): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA.
'Meteoritic Iron'
Reference: Floran, R. J. (1978) Silicate petrography, classification, and origin of the mesosiderites - Review and new observations. In: Lunar and Planetary Science Conference, Proceedings XI. Vol. 1, 1053-1081 :New York, Pergamon Press, Inc.
'Orthopyroxene Subgroup'
Description: As yellow crystal fragments & elsewhere
Reference: Lapaz, L. & Lapaz, J. (1954)The Adrar (=Chinguetti), Mauritania, French West Africa, Meteorite (CN=0127,202): Meteoritics 1(2):187-196.; Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J. [Ed.]): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA.
'Pyroxene Group'
Reference: Floran, R. J. (1978) Silicate petrography, classification, and origin of the mesosiderites - Review and new observations. In: Lunar and Planetary Science Conference, Proceedings XI. Vol. 1, 1053-1081 :New York, Pergamon Press, Inc.
Rutile
Formula: TiO2
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Schreibersite
Formula: (Fe,Ni)3P
Reference: Lapaz, L. & Lapaz, J. (1954)The Adrar (=Chinguetti), Mauritania, French West Africa, Meteorite (CN=0127,202): Meteoritics 1(2):187-196.; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Taenite
Formula: (Fe,Ni)
Reference: Lapaz, L. & Lapaz, J. (1954)The Adrar (=Chinguetti), Mauritania, French West Africa, Meteorite (CN=0127,202): Meteoritics 1(2):187-196.; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Tridymite
Formula: SiO2
Reference: Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J. [Ed.]): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA.
Troilite
Formula: FeS
Reference: Lapaz, L. & Lapaz, J. (1954)The Adrar (=Chinguetti), Mauritania, French West Africa, Meteorite (CN=0127,202): Meteoritics 1(2):187-196.; 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
Iron1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Schreibersite1.BD.05(Fe,Ni)3P
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Ilmenite4.CB.05Fe2+TiO3
Rutile4.DB.05TiO2
Tridymite4.DA.10SiO2
Group 8 - Phosphates, Arsenates and Vanadates
Merrillite8.AC.45Ca9NaMg(PO4)7
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
'Meteoritic Iron'-
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Schreibersite1.1.21.2(Fe,Ni)3P
Taenite1.1.11.2(Fe,Ni)
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
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
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
(AB)3(XO4)2
Merrillite38.3.4.4Ca9NaMg(PO4)7
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Tridymite75.1.2.1SiO2
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
Iron-Fe
'Meteoritic Iron'-
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals for each chemical element

OOxygen
O ChromiteFe2+Cr23+O4
O IlmeniteFe2+TiO3
O RutileTiO2
O MerrilliteCa9NaMg(PO4)7
O TridymiteSiO2
NaSodium
Na MerrilliteCa9NaMg(PO4)7
MgMagnesium
Mg MerrilliteCa9NaMg(PO4)7
SiSilicon
Si TridymiteSiO2
PPhosphorus
P Schreibersite(Fe,Ni)3P
P MerrilliteCa9NaMg(PO4)7
SSulfur
S TroiliteFeS
CaCalcium
Ca MerrilliteCa9NaMg(PO4)7
TiTitanium
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Schreibersite(Fe,Ni)3P
Fe Taenite(Fe,Ni)
Fe TroiliteFeS
Fe ChromiteFe2+Cr23+O4
Fe IlmeniteFe2+TiO3
Fe IronFe
NiNickel
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Schreibersite(Fe,Ni)3P
Ni Taenite(Fe,Ni)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Lapaz, L., Lapaz, J. (1954) The Adrar (=Chinguetti), Mauritania, French West Africa, Meteorite (CN=0127,202): Meteoritics, 1(2), 187-196.
Monod, Th. (1955) The problem of the Chinguetti [French West Africa] Meteorite [CN=0127,202:] (Translation from French). Meteoritics, 1(3), 308-314.
Ramdohr, P. (1973) The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Floran, R. J. (1978) Silicate petrography, classification, and origin of the mesosiderites - Review and new observations. Lunar and Planetary Science Conference, Proceedings XI. Vol. 1, 1053-1081. New York, Pergamon Press, Inc.
Delaney, J.S., Nehru, C.E., Prinz, M. (1980) Olivine clasts from mesosiderites and howardites: Clues to the nature of achondritic parent bodies. Lunar and Planetary Science Conference XI, 1073-1087.
Delaney, J. S., Prinz, M., Harlow, G. E., Nehru, C. E. (1981) Metamorphism in mesosiderites. Proceedings Lunar and Planetary Science Conference, 12B, 1315-1342.
Monod, T., Zanda, B. (1992) Le fer de Dieu : histoire de la meteorite de Chinguetti. Le Mejean, Arles: Actes Sud. 135 pages; ill.; 22 cm.
Mittlefehldt, D.W., McCoy, T.J., Goodrich, C.A., Kracher, A. (1998) Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J.J. [Ed.]): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA. [Cf., esp. - Table 41]
Grady, M.M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
Welten, K.C. et al. (2001) Exposure age, terrestrial age and pre-atmospheric radius of the Chinguetti mesosiderite: Not part of a much larger mass. Meteoritics & Planetary Science, 36(6), 939-946 (July 2001).
Grady, M.M, Pratesi, G., Cecchi, V.M. (2015) Atlas of Meteorites (5/e). Cambridge University Press: Cambridge, UK. 373 pages.

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Chinguetti_meteorite
Wikidata ID:Q5101045

External Links



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