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Zacatecas (1792) meteorite, Vetagrande Municipality, Zacatecas, Mexicoi
Regional Level Types
Zacatecas (1792) meteoriteMeteorite Fall Location
Vetagrande MunicipalityMunicipality
ZacatecasState
MexicoCountry

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Key
Latitude & Longitude (WGS84):
22° 49' North , 102° 34' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Vetagrande1,093 (2018)2.2km
Cata de Juanes181 (2014)2.6km
Bracho (Lomas de Bracho)247 (2014)2.8km
El Llano de las Vírgenes331 (2014)3.1km
Guadalupito253 (2014)3.2km


Iron meteorite (Iron, ungrouped)
Find, 1792; 1 ton

The Zacatecas (1792) iron meteorite mass [an irregular 106x56x30 cm block] was apparently known to some of the conquistadores by the 16th century, but only in the early 19th century was its presence publicized with several samples being sent to Europe and elsewhere. Most of the currently held mass is held at the Old School of Engineering in Mexico City (~780 kg), but Buchwald (1975) has argued persuasively that the original mass would have been ~1 ton. The meteorite (Ni ~6%) consists primarily of polycrystalline kamacite with accessory troilite, schreibersite, and chromite. Some of the troilite has been shock-melted. The meteorite possesses indistinct Widmanstätten patterns. These unusual are indicative of an incomplete conversion of the original high-temperature taenite phase into the more uniform kamacite-dominated octahedral pattern found in most irons with this composition.

117 ungrouped iron meteorites (~10% of all irons) are currently listed with the Meteoritical Bulletin Database (August 2015). Zacatecas (1792) is the 5th most massive member of this group. Please note, 'ungrouped' is not a synonym for 'unclassified.' An 'ungrouped' iron has been classified — and it does not belong to any of the defined iron meteorite groups.

What's in a name? Zacatecas (1969) is a much less massive 6.69 kg IIIAB iron found much more recently in the same general area.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 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: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Iron
Formula: Fe
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Schreibersite
Formula: (Fe,Ni)3P
Description: Numerous rhabdites present.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Taenite
Formula: (Fe,Ni)
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Troilite
Formula: FeS
Description: Troilite has been shock-melted and may be bordered by shattered schreibersite.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 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

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 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Unclassified Minerals, Mixtures, etc.
Iron-Fe

List of minerals for each chemical element

OOxygen
O ChromiteFe2+Cr23+O4
PPhosphorus
P Schreibersite(Fe,Ni)3P
SSulfur
S TroiliteFeS
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe ChromiteFe2+Cr23+O4
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Schreibersite(Fe,Ni)3P
Fe Taenite(Fe,Ni)
Fe TroiliteFeS
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)
Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Choi, B.-G., Ouyang, X. & Wasson, J.T. (1995) Classification and origin of IAB and IIICD iron meteorites: Geochimica et Cosmochimica Acta 59 (3): 593-612. (Feb 1995).
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

External Links

http://www.lpi.usra.edu/meteor/metbull.php = Meteoritical Bulletin Database
http:www.lpi.usra.edu/meteor/metbull.php?code=30381 -Zacatecas(1792)@MetBullDatabase
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5632417 - photo
http://evols.library.manoa.hawaii.edu/bitstream/handle/10524/35898/vol3-Za-Ze(LO).pdf#page=1 -Buchwald

Other Regions, Features and Areas containing this locality

North America 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.
 
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