Howardite
Fell 2 Aug 1882; 2 kg

The Pavlovka Meteorite is a single stone that fell, after detonations, near a village of Pavlovka. Its primary constituents are variable orthopyroxenes (Diogenitic) accompanied by pigeonite and anorthitic plagioclase (Eucritic). This is more or less expected as Howardites are brecciated achondrites predominantly composed of various mixtures of Eucritic and Diogenitic components. Pavlovka is, however, distinguished from other Howardites by a compositional diversity unusual even for a Howardite. It is also distinguished from some Howardites by ferroan silicates and a minor, but quite diverse suite of olivines. Chondritic material and minor opaques (e.g., chromite and ilmenite) are also reported. In sum, Pavlovka appears to be a melange of small and unusually diverse igneous clasts which were packed together very quickly — perhaps during the very moments when its constituents were being launched into space during a catastrophic impact.

The recent DAWN Spacecraft Mission to Vesta has made it very clear that most or even almost all of the HED meteorites (Howardites-Eucrites-Diogenites) such as Pavlovka are fragments of the brightest and nearest large asteroid, 4 Vesta. However, high resolution O-isotope and other studies have also made it clear that some small, but currently unknown number of HED meteorites are derived from other presently unidentified asteroids. Final determination of Original Parent Bodies for specific HED meteorites such as Pavlovka remains a work in progress.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

7 valid minerals.

Meteorite/Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

ⓘ Howardite meteorite

Detailed Mineral List:

ⓘ Anorthite

Formula: Ca(Al₂Si₂O₈)

Description: Anorthite An-97-90 reported by Duke & Silver (1967)

References:

Duke, Michael B., Silver, Leon T. (1967) Petrology of eucrites, howardites and mesosiderites. Geochimica et Cosmochimica Acta, 31 (10) 1637-1665 doi:10.1016/0016-7037(67)90112-3

Lewis, J.A., Jones, R.H. & Brearley, A.J. (2016) Alkali feldspar exsolution in ordinary chondrites: Alkali metasomatism, metamorphism, and cooling rates: 47th Lunar and Planetary Conference: 2559.pdf. [Online]

ⓘ Anorthite var. Bytownite

Formula: (Ca,Na)[Al(Al,Si)Si₂O₈]

References:

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

ⓘ Chromite

Formula: Fe²⁺Cr³⁺₂O₄

References:

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.

Olsen, E. J., Fredriksson, K., Rajan, S., & Noonan, A. (1990) Chondrule-like objects and brown glasses in howardites: Meteoritics 25 (3): 187-194. (Sept 1990)

ⓘ 'Clinopyroxene Subgroup'

References:

ⓘ 'Fayalite-Forsterite Series'

Description: Olivine Range Fa36-49 reported by Desnoyers & Jerome (1973); More Fayalitic Interstitial Olivine (Fa24-34) reported by Olsen, E. J. et. al., (1990)

References:

Desnoyers. C. & Jerome, D.Y. (1973) Olivine Compositions in Howardites and other achondritic meteorite (abstract): Meteoritics 8 (4): 344-345. (Dec 1973)

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

Olsen, E. J., Fredriksson, K., Rajan, S., & Noonan, A. (1990) Chondrule-like objects and brown glasses in howardites: Meteoritics 25 (3): 187-194. (Sept 1990)

Kessel, R., Beckett, J.R. & Stolper, E.M. (2007) The thermal history of equilibrated ordinary chondrites and the relationship between textural maturity and temperature: Geochimica et Cosmochimica Acta 71(7):18855-1881. (April 2007).

ⓘ Ferrosilite

Formula: Fe²⁺₂Si₂O₆

Description: Described as Ferrohypersthene by Bunch (1975)

References:

Bunch, T. E. (1975) Petrography and petrology of basaltic achondrite polymict breccias /Howardites: Lunar Science Conference VI, Proceedings. Vol. 1: 469-492. (March 1975)

ⓘ Hedenbergite

Formula: CaFe²⁺Si₂O₆

Description: aka - Ferrohedenbergite

References:

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

ⓘ 'K Feldspar'

Description: As exsolution lamellae in albite laths.

References:

ⓘ 'Orthopyroxene Subgroup'

References:

Mason, Brian (1967) The Bununu meteorite, and a discussion of the pyroxene-plagioclase achondrites. Geochimica et Cosmochimica Acta, 31 (2) 107-115 doi:10.1016/s0016-7037(67)80040-1

Duke, Michael B., Silver, Leon T. (1967) Petrology of eucrites, howardites and mesosiderites. Geochimica et Cosmochimica Acta, 31 (10) 1637-1665 doi:10.1016/0016-7037(67)90112-3

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

ⓘ Pigeonite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

References:

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

Description: Plagioclase Ab7-13 reported by Mason et. al., (1979) indicates that both Bytownite and Anorthite are present

References:

Bunch, T. E. (1975) Petrography and petrology of basaltic achondrite polymict breccias /Howardites: Lunar Science Conference VI, Proceedings. Vol. 1: 469-492. (March 1975)

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

Description: Pyroxenes vary from E80—En33

References:

Labotka, T. C. & Papike, J. J. (1980) Howardites - Samples of the regolith of the eucrite parent-body: Petrology of Frankfort, Pavlovka, Yurtuk, Malvern, and ALHA 77302. Lunar and Planetary Science Conference XI, Proceedings. Vol. 2: 1103-1130. (March 1980)

ⓘ Tridymite

Formula: SiO₂

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Chromite	4.BB.05	Fe²⁺Cr³⁺₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Tridymite	4.DA.10	SiO₂
Group 9 - Silicates
ⓘ	Ferrosilite	9.DA.05	Fe²⁺₂Si₂O₆
ⓘ	Pigeonite	9.DA.10	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Hedenbergite	9.DA.15	CaFe²⁺Si₂O₆
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
ⓘ	var. Bytownite	9.FA.35	(Ca,Na)[Al(Al,Si)Si₂O₈]
Unclassified
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'K Feldspar'	-
ⓘ	'Pyroxene Group'	-	ADSi₂O₆
ⓘ	'Orthopyroxene Subgroup'	-

List of minerals for each chemical element

O	Oxygen
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
O	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
O	ⓘ Ferrosilite	Fe₂²⁺Si₂O₆
O	ⓘ Hedenbergite	CaFe²⁺Si₂O₆
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Tridymite	SiO₂
O	ⓘ Fayalite-Forsterite Series
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Pyroxene Group	ADSi₂O₆
Na	Sodium
Na	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Fayalite-Forsterite Series
Al	Aluminium
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Al	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Si	ⓘ Ferrosilite	Fe₂²⁺Si₂O₆
Si	ⓘ Hedenbergite	CaFe²⁺Si₂O₆
Si	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Tridymite	SiO₂
Si	ⓘ Fayalite-Forsterite Series
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Pyroxene Group	ADSi₂O₆
Ca	Calcium
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Ca	ⓘ Hedenbergite	CaFe²⁺Si₂O₆
Ca	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Cr	Chromium
Cr	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	Iron
Fe	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	ⓘ Ferrosilite	Fe₂²⁺Si₂O₆
Fe	ⓘ Hedenbergite	CaFe²⁺Si₂O₆
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Fayalite-Forsterite Series

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

Baltic Shield
- Voronezh MassifShield

EuropeContinent

Soviet Union (1922-1991)Country

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References

en.wikipedia.org (n.d.) http://en.wikipedia.org/wiki/Pavlovka_%28meteorite%29

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5642262

www.hou.usra.edu (n.d.) http://www.hou.usra.edu/meetings/lpsc2016/pdf/2559.pdf

Mason, Brian (1967) The Bununu meteorite, and a discussion of the pyroxene-plagioclase achondrites. Geochimica et Cosmochimica Acta, 31 (2) 107-115 doi:10.1016/s0016-7037(67)80040-1

Duke, Michael B., Silver, Leon T. (1967) Petrology of eucrites, howardites and mesosiderites. Geochimica et Cosmochimica Acta, 31 (10) 1637-1665 doi:10.1016/0016-7037(67)90112-3

Desnoyers. C. & Jerome, D.Y. (1973) Olivine Compositions in Howardites and other achondritic meteorite (abstract): Meteoritics 8 (4): 344-345. (Dec 1973)

Bunch, T. E. (1975) Petrography and petrology of basaltic achondrite polymict breccias /Howardites: Lunar Science Conference VI, Proceedings. Vol. 1: 469-492. (March 1975)

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

Olsen, E. J., Fredriksson, K., Rajan, S., & Noonan, A. (1990) Chondrule-like objects and brown glasses in howardites: Meteoritics 25 (3): 187-194. (Sept 1990)

Grady, Monica (2000) Catalogue of Meteorites (5th ed.). Cambridge University Press.

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 Acta73 (19): 5835-5853. (Oct 2009)

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/metbull.php

McSween, Harry Y.; Binzel, Richard P.; De Sanctis, M. Cristina; Ammannito, Eleonora; Prettyman, Thomas H.; Beck, Andrew W.; Reddy, Vishnu; Le Corre, Lucille; Gaffey, Michael J.; McCord, Thomas B.; et al. (2013) Dawn; the Vesta–HED connection; and the geologic context for eucrites, diogenites, and howardites. Meteoritics & Planetary Science, 48 (11). 2090-2104 doi:10.1111/maps.12108

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Pavlovka meteorite, Pavlovka, Saratov Oblast, Russia i
Regional Level Types
Pavlovka meteorite Meteorite Fall Location
Pavlovka - not defined -
Saratov Oblast Oblast
Russia Country