Zacatecas (1792) meteorite, Vetagrande Municipality, Zacatecas, Mexicoi
Regional Level Types | |
---|---|
Zacatecas (1792) meteorite | Meteorite Fall Location |
Vetagrande Municipality | Municipality |
Zacatecas | State |
Mexico | Country |
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Key
Latitude & Longitude (WGS84):
22° 49' North , 102° 34' West
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Vetagrande | 1,093 (2018) | 2.2km |
Cata de Juanes | 181 (2014) | 2.6km |
Bracho (Lomas de Bracho) | 247 (2014) | 2.8km |
El Llano de las Vírgenes | 331 (2014) | 3.1km |
Guadalupito | 253 (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 ElementsMineral 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 DiagramDetailed 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 | |||
---|---|---|---|
ⓘ | Iron | 1.AE.05 | Fe |
ⓘ | var: Kamacite | 1.AE.05 | (Fe,Ni) |
ⓘ | Schreibersite | 1.BD.05 | (Fe,Ni)3P |
ⓘ | Taenite | 1.AE.10 | (Fe,Ni) |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Troilite | 2.CC.10 | FeS |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Chromite | 4.BB.05 | Fe2+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) |
ⓘ | Schreibersite | 1.1.21.2 | (Fe,Ni)3P |
ⓘ | Taenite | 1.1.11.2 | (Fe,Ni) |
Group 2 - SULFIDES | |||
AmXp, with m:p = 1:1 | |||
ⓘ | Troilite | 2.8.9.1 | FeS |
Group 7 - MULTIPLE OXIDES | |||
AB2X4 | |||
ⓘ | Chromite | 7.2.3.3 | Fe2+Cr3+2O4 |
Unclassified Minerals, Mixtures, etc. | |||
ⓘ | Iron | - | Fe |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Chromite | Fe2+Cr23+O4 |
P | Phosphorus | |
P | ⓘ Schreibersite | (Fe,Ni)3P |
S | Sulfur | |
S | ⓘ Troilite | FeS |
Cr | Chromium | |
Cr | ⓘ Chromite | Fe2+Cr23+O4 |
Fe | Iron | |
Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Fe | ⓘ Iron (var: Kamacite) | (Fe,Ni) |
Fe | ⓘ Schreibersite | (Fe,Ni)3P |
Fe | ⓘ Taenite | (Fe,Ni) |
Fe | ⓘ Troilite | FeS |
Fe | ⓘ Iron | Fe |
Ni | Nickel | |
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
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
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