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Huizopa meteorite, Huizopa, Chihuahua, Mexico

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Latitude & Longitude (WGS84): 28° 54' North , 108° 34' West
Latitude & Longitude (decimal): 28.90000,-108.56667
GeoHash:G#: 9t4u3t04t
Locality type:Meteorite Fall Location
Meteorite Class:IVA iron meteorite
Meteoritical Society Class:Iron, IVA
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Csa : Hot-summer Mediterranean climate


Iron meteorite, octahedrite (IVA, Of)
Find, 1907; 140 kg

One large mass (108.5 kg) of meteoritic iron [7.9% Ni] with several smaller masses were found in a ruin near Huizopa. In 1931 Nininger discovered that the main mass (~ dimensions 65 x 35 x 18 cm) was being treated as an ore body in a Chihuahua City museum. In appreciation for his work he was allowed to take half of that mass back with him to the United States. After examining several sections Buchwald (1965) was able to partially disentangle the most salient aspects of the preterrestrial shocks, terrestrial weathering, and human deformation [hammering, chiseling] which had effected the mass. Most surface of all fragments are covered with ~1-2 mm thick oxide crusts as all of the original fusion crust has long disappeared. Kamacite is prominent with tiny taenite grains decorating Neumann bands (perhaps produced by preterrestrial shock). Plessite (40 vol%) is prominent as well. Troilite nodules — distorted by hammering — are found in accessory amounts. Small amounts of daubréelite — protected inside kamacite and troilite — have also survived the weathering processes.

Huizopa's very fine taenite lamellae have been studied to determine estimates of its relatively quick cooling rate as compared to other irons. A cosmic ray exposure age of >400 Ma and a terrestrial exposure age of 36 Ma have been reported. Huizopa is the 8th most massive of 79 Iron IVA iron meteorites currently listed with the Meteoritical Bulletin Database (September 2015). Three IVA irons are known from Mexico including the 425 kg Yanhuitlan meteorite recovered in 1825.

As of 2000, approximately half of the original mass remained in Chihuahua City, Mexico. An additional 6.3 kg was in Mexico City while several masses of a kilogram or more were distributed elsewhere.

Regions containing this locality

Sonoran Desert, North America

Desert - 1,135 mineral species & varietal names listed

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Standard Detailed Strunz Dana Chemical Elements

Mineral List


4 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:

Daubréelite
Formula: Fe2+Cr3+2S4
Description: Found as lamellae in troilite and as isolated blebs in kamacite.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Iron
Formula: Fe
Reference: Prior, G. T. (1923) Catalogue of Meteorites: with special reference to those represented in the collection of the British Museum of Natural History. Richard Clay & Sons, Limited: Bungay, Suffolk.; Wasson, J. T. (1979) An Equation for the Determination of Iron-Meteorite Cooling Rates: Meteoritics 6(3): 139-147.; Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Prior, G. T. (1923) Catalogue of Meteorites: with special reference to those represented in the collection of the British Museum of Natural History. Richard Clay & Sons, Limited: Bungay, Suffolk.; Wasson, J. T. (1979) An Equation for the Determination of Iron-Meteorite Cooling Rates: Meteoritics 6(3): 139-147.; Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
'IVA iron meteorite'
Reference: Meteoritical Society Database
'Plessite'
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Taenite
Formula: (Fe,Ni)
Description: Neumann bands are decorated by 0.5 µ taenite precipitation grains
Reference: Prior, G. T. (1923) Catalogue of Meteorites: with special reference to those represented in the collection of the British Museum of Natural History. Richard Clay & Sons, Limited: Bungay, Suffolk.; Wasson, J. T. (1979) An Equation for the Determination of Iron-Meteorite Cooling Rates: Meteoritics 6(3): 139-147.; Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Troilite
Formula: FeS
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.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
'Daubréelite'2.DA.05Fe2+Cr3+2S4
Troilite2.CC.10FeS
Unclassified Minerals, Rocks, etc.
'IVA iron meteorite'-
Plessite-

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)
Taenite1.1.11.2(Fe,Ni)
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 3:4
Daubréelite2.10.1.11Fe2+Cr3+2S4
Unclassified Minerals, Rocks, etc.
'IVA iron meteorite'-
Iron-Fe
'Plessite'-

List of minerals for each chemical element

SSulfur
S DaubréeliteFe2+Cr23+S4
S TroiliteFeS
CrChromium
Cr DaubréeliteFe2+Cr23+S4
FeIron
Fe DaubréeliteFe2+Cr23+S4
Fe IronFe
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Taenite(Fe,Ni)
Fe TroiliteFeS
NiNickel
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Taenite(Fe,Ni)

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

Neogene
2.588 - 23.03 Ma



ID: 2430274

Age: Neogene (2.588 - 23.03 Ma)

Lithology: Acidic igneous extrusive

Reference: Instituto Nacional de Estadística, Geografía e Informática. Conjunto de Datos Vectoriales Geológicos. Continuo Nacional. Escala 1:1’000,000. [63]

Miocene - Oligocene
5.333 - 33.9 Ma



ID: 3184329
Cenozoic volcanic rocks

Age: Cenozoic (5.333 - 33.9 Ma)

Comments: Sierra Madre Occidental

Lithology: Ignimbrite(s); felsic 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)
Prior, G. T. (1923) Catalogue of Meteorites: with special reference to those represented in the collection of the British Museum of Natural History. Richard Clay & Sons, Limited: Bungay, Suffolk.
Wasson, J. T. (1979) An Equation for the Determination of Iron-Meteorite Cooling Rates: Meteoritics 6(3): 139-147.
Nininger, H.H. (1972). Find a Falling Star. Paul S. Eriksson, Inc.: New York. 254 pages.
Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
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.

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