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Chaves meteorite, Vilarelho da Raia, Vilarelho da Raia, Chaves, Vila Real, Portugali
Regional Level Types
Chaves meteoriteMeteorite Fall Location
Vilarelho da Raia- not defined -
Vilarelho da Raia- not defined -
Chaves- not defined -
Vila RealDistrict
PortugalCountry

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Name(s) in local language(s):Meteorito de Chaves, Vilarelho da Raia, Vilarelho da Raia, Chaves, Distrito de Vila Real, Portugal
Latitude & Longitude (WGS84): 41° 55' 59'' North , 7° 28' 0'' West
Latitude & Longitude (decimal): 41.93333,-7.46667
GeoHash:G#: ez6ww1dzq
Locality type:Meteorite Fall Location
Meteorite Class:Howardite meteorite
Meteoritical Society Class:Howardite
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Csb : Warm-summer Mediterranean climate


Howardite
Fell, 3 May 1925; 2.95 kg

About midday after 2 detonations and a thunderous roll, 3 fragments covered with shiny black crusts fell in the village of Vilarelho da Raia (now apparently part of Vila Real), 8 km from Chaves, Portugal. Chaves is composed predominantly of orthopyroxene, pigeonite, and anorthitic plagioclase fragments accompanied by dark brown glass and a variety of partially devitrified assemblages. The Chaves meteorite was the tenth of the only 16 witnessed Howardite falls between 1803 and 1994. Minor accessory silicates (tridymite, quartz, Ca-rich pyroxene, traces of olivine) and a few opaques (magnetite, ilmenite, troilite, Fe-rich metal)are present. Variable pyroxenes are sometimes enstatite-rich, sometimes mildly ferrosillic. Plagioclase is similarly variable with both anorthite and bytownite compositions present.

Howardites are members of the HED clan of meteorites (Howardites-Eucrites-Diogenites) with Howardites having been formed primarily from a brecciated brew of crustal Eucritic materials mixed with plutonic Diogenitic orthopyroxenites on one or more moderately large differentiated asteroids. The mixing was sometimes quite violent and as a general rule the Howardites tend to be more variable than the Eucrites and Diogenites which are, occasionally, surprisingly equilibrated and/or intact. It is believed that most or almost all — but definitely not all — HED meteorites are derived from the asteroid 4 Vesta, the nearest of the larger asteroids. Chaves mineralogy is apparently consistent with this hypothesis — but definitive determination of parent bodies for individual HED meteorites is still a work in progress (See latest references below).

Regions containing this locality

Iberian Peninsula

Peninsula - 1,601 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


6 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'
Description: Anorthitic plagioclase, usually twinned, has both anorthite and bytownite compositions — Plagioclase Ab9—24 reported by Mason et al.,(1979); Monteiro (1989) reports (Or0.6Ab6An94)—(Or0.6Ab12An 87)
Reference: Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45. ; Prinz, M., Delaney, J. S., Harlow, G. E., Bedell, R. L., & Nehru, C. E. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219: Lunar and Planetary Science Conference XI, vol 2: 1055-1071. ; Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution #712: p.165
'Clinopyroxene Subgroup'
Description: Ca content in pyroxenes reaches Wo24 (Wo24En38FS38) according to Monteiro (1989)
Reference: Prinz, M., Delaney, J. S., Harlow, G. E., Bedell, R. L., & Nehru, C. E. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219: Lunar and Planetary Science Conference XI, vol 2: 1055-1071.
'Fayalite-Forsterite Series'
Description: In trace amounts only. Prinz et al., (1980) are the only authors in the references to report olivine. Both Monteiro and Mason et al. specifically noted the apparent absence of olivine in their samples.
Reference: Prinz, M., Delaney, J. S., Harlow, G. E., Bedell, R. L., & Nehru, C. E. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219: Lunar and Planetary Science Conference XI, vol 2: 1055-1071.
'Howardite meteorite'
Reference: Meteoritical Society Database
'Hypersthene'
Formula: (Mg,Fe)SiO3
Reference: Mason, B. (1967) The Bununu meteorite, and a discussion of the pyroxene-plagioclase achondrites: Geochimica et Cosmochimica Acta 31(2): 107-115.
Ilmenite
Formula: Fe2+TiO3
Reference: Prinz, M., Delaney, J. S., Harlow, G. E., Bedell, R. L., & Nehru, C. E. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219: Lunar and Planetary Science Conference XI, vol 2: 1055-1071. ; Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution #712: p.165
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution #712: p.165
'Orthopyroxene Subgroup'
Reference: Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45. ; Prinz, M., Delaney, J. S., Harlow, G. E., Bedell, R. L., & Nehru, C. E. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219: Lunar and Planetary Science Conference XI, vol 2: 1055-1071.
Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.
'Pyroxene Group'
Description: Ca-poor Pyroxene (mostly orthopyroxene) ranges from Wo2 En78 Fs18 — Wo5 En37 Fs58 according to Monteiro (1989); Mason et. al. (1979) findings similar, but not as extensive.
Reference: Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution #712: p.165
Quartz
Formula: SiO2
Description: Only as a minor accessory. When found, quartz is invariably associated with magnetite, glass, and partially devitrified pyroxene.
Reference: Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45. ; Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution #712: p.165
Tridymite
Formula: SiO2
Description: Only in minor amounts
Reference: Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45. ; Prinz, M., Delaney, J. S., Harlow, G. E., Bedell, R. L., & Nehru, C. E. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219: Lunar and Planetary Science Conference XI, vol 2: 1055-1071. ; Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution #712: p.165
Troilite
Formula: FeS
Reference: Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution #712: p.165

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Troilite'2.CC.10FeS
Group 4 - Oxides and Hydroxides
'Ilmenite'4.CB.05Fe2+TiO3
'Magnetite'4.BB.05Fe2+Fe3+2O4
'Quartz'4.DA.05SiO2
'Tridymite'4.DA.10SiO2
Group 9 - Silicates
'Pigeonite'9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Clinopyroxene Subgroup'-
'Fayalite-Forsterite Series'-
'Howardite meteorite'-
'Hypersthene'-(Mg,Fe)SiO3
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Pigeonite65.1.1.4(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Tridymite75.1.2.1SiO2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Clinopyroxene Subgroup'-
'Fayalite-Forsterite Series'-
'Howardite meteorite'-
'Hypersthene'-(Mg,Fe)SiO3
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals for each chemical element

OOxygen
O Hypersthene(Mg,Fe)SiO3
O IlmeniteFe2+TiO3
O MagnetiteFe2+Fe23+O4
O Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
O QuartzSiO2
O TridymiteSiO2
MgMagnesium
Mg Hypersthene(Mg,Fe)SiO3
Mg Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
SiSilicon
Si Hypersthene(Mg,Fe)SiO3
Si Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si QuartzSiO2
Si TridymiteSiO2
SSulfur
S TroiliteFeS
CaCalcium
Ca Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
TiTitanium
Ti IlmeniteFe2+TiO3
FeIron
Fe Hypersthene(Mg,Fe)SiO3
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe TroiliteFeS

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

Quaternary - Neogene
0 - 23.03 Ma



ID: 3162115
Neogene conglomerate

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Major:{conglomerate}, Minor{sand,mud}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Pleistocene
0.0117 - 2.588 Ma



ID: 2510833

Age: Pleistocene (0.0117 - 2.588 Ma)

Description: Conglomerate, gravel, sand, sandstone, silt and clay. Fluvial and marine terraces

Lithology: Gravel, conglomerate, sand and silt

Reference: Mapa Geológico de la Península Ibérica, Baleares y Canarias a escala 1:1.000.000. Instituto Geológico y Minero de España. [77]

Ordovician
443.8 - 485.4 Ma



ID: 3185519
Paleozoic sedimentary rocks

Age: Ordovician (443.8 - 485.4 Ma)

Comments: Cantabrian Orogen

Lithology: Sedimentary 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. (1967) The Bununu meteorite, and a discussion of the pyroxene-plagioclase achondrites: Geochimica et Cosmochimica Acta 31(2): 107-115.
Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.
Prinz, M., Delaney, J. S., Harlow, G. E., Bedell, R. L., & Nehru, C. E. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219: Lunar and Planetary Science Conference XI, vol 2: 1055-1071.
Monteiro, J. F. (1989) Preliminary Study of Chaves Howardite: Abstracts and Program for the 52nd Annual Meeting of the Meteoritical Society. LPI Contribution 712: p.165
Grady, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
Scott, E.R.D., Greenwood, R.C., Franchi, I.A. & Sanders, I.S. (2009) Oxygen isotopic constraints on the origin and parent bodies of eucrites, diogenites, and howardites. Geochimica et Cosmochimica Acta 73 (19): 5835-5853. (Oct 2009)
McSween, H. Y. Jr. & 11 others (1913). Dawn, the Vesta-HED connection; and the Geological context for eucrites, diogenites, and howardites. Meteoritics & Planetary Science 48 (13): 2090-2104. (Nov 2013)

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