Diogenite
Fell 30 Nov 1850, 4 kg

After detonations a very large stone was recovered, but only a small fraction was retained. Shalka was just the second witnessed fall of a diogenite. All 11 diogenite falls are pyroxenites (> 90 vol% orthopyroxenes) accompanied by small amounts of additional silicates and various opaques. Shalka's silicates include small amounts of exolved clinopyroxene, albitic plagioclase, and an unidentified silica phase. Opaques include chromite, ilmenite, troilite, and Ni-poor iron. Fluorapatite has also been observed.

Current research on diogenites is focused on the relationships between the pyroxenite-rich diogenites (the predominant diogenite subgroup), a few olivine-rich diogenites (all finds), and the surface of asteroid 4Vesta. Vesta is the apparent home of most HED (Howardite-Eucrite-Diogenite) meteorites, but how the material of these meteorites were formed on their original homebody and was eventually transported to the planet Earth contains an entire set of open and only partially answered questions.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

6 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

ⓘ Diogenite meteorite

Detailed Mineral List:

ⓘ Anorthite

Formula: Ca(Al₂Si₂O₈)

References:

Mason, B. (1963). The Hypersthene achondrites. American Museum Novitates, #2155, 13 pages.

ⓘ Anorthite var. Bytownite

Formula: (Ca,Na)[Al(Al,Si)Si₂O₈]

References:

Mason, B. (1963). The Hypersthene achondrites. American Museum Novitates, #2155, 13 pages.

ⓘ Chromite

Formula: Fe²⁺Cr³⁺₂O₄

References:

146-157 (Jan/Feb 1971)

Mason, B. (1963). The Hypersthene achondrites. American Museum Novitates, #2155, 13 pages.

Bunch, T. E., Keil, Klaus (1971) Chromite and ilmenite in non-chondritic meteorites. American Mineralogist, 56 (1-2) 146-157

Bowman, L. E., Spilde, M. N. & Papike, P. P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)

Bowman, L. E., Papike, J. J. & Spilde, M. N. (1999) Diogenites as asteroidal cumulates: Insights from spinel chemistry: American Mineralogist: 84 (7-8): 1020–1026. (July-August 1999)

ⓘ 'Clinopyroxene Subgroup'

References:

Bowman, L. E., Spilde, M. N. & Papike, P. P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

Domanik, K. J., Sideras, L. C. & Drake, M. J. (2005) Olivine and Ca-Phosphate in the Diogenites Manegaon and Roda: Lunar and Planetary Science Conference XXXVI, abstract no.2128. (March 2005)

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

146-157 (Jan/Feb 1971)

Bunch, T. E., Keil, Klaus (1971) Chromite and ilmenite in non-chondritic meteorites. American Mineralogist, 56 (1-2) 146-157

ⓘ Native Iron

Formula: Fe

Description: Ni-poor Iron (Ni <1.5 wt%)

References:

Gooley, R., Moore, C. B. (1976) Native metal in diogenite meteorites. American Mineralogist, 61 (5-6) 373-378

ⓘ 'Orthopyroxene Subgroup'

References:

Gooley, R., Moore, C. B. (1976) Native metal in diogenite meteorites. American Mineralogist, 61 (5-6) 373-378

Bowman, L. E., Spilde, M. N. & Papike, P. P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

Description: Plagioclase (Ab15An85)

References:

Mason, B. (1963). The Hypersthene achondrites. American Museum Novitates, #2155, 13 pages.

Bowman, L. E., Spilde, M. N. & Papike, P. P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

References:

Mason, B. (1963). The Hypersthene achondrites. American Museum Novitates, #2155, 13 pages.

ⓘ 'Silica'

References:

Bowman, L. E., Spilde, M. N. & Papike, P. P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)

ⓘ Troilite

Formula: FeS

References:

Bowman, L. E., Spilde, M. N. & Papike, P. P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Iron	1.AE.05	Fe
Group 2 - Sulphides and Sulfosalts
ⓘ	Troilite	2.CC.10	FeS
Group 4 - Oxides and Hydroxides
ⓘ	Chromite	4.BB.05	Fe²⁺Cr³⁺₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
ⓘ	var. Bytownite	9.FA.35	(Ca,Na)[Al(Al,Si)Si₂O₈]
Unclassified
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Pyroxene Group'	-	ADSi₂O₆
ⓘ	'Silica'	-
ⓘ	'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	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Pyroxene Group	ADSi₂O₆
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Na	Sodium
Na	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
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	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Pyroxene Group	ADSi₂O₆
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
S	Sulfur
S	ⓘ Troilite	FeS
Ca	Calcium
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
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	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Native Iron	Fe
Fe	ⓘ Troilite	FeS

Other Regions, Features and Areas containing this locality

AsiaContinent

Indian Plate (India Plate)Tectonic Plate

Bengal Delta Sub-basin - Bengal basinBasin
Central Indian Tectonic ZoneNarrow Rift

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.

References

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5640900

Haidinger, W.K. von (1860): Die Calcutta-Meteoriten, von Shalka, Futtehpore, Pegu, Assam und Segowlee im k. k. Hof-Mineralien-Cabinete. Sitzungsberichte der Akademie der Wissenschaften mathematisch-naturwissenschaftliche Klasse, 41, 745-758. [http://www.zobodat.at/pdf/SBAWW_41_0745-0758.pdf]

Mason, B. (1963). The Hypersthene achondrites. American Museum Novitates, #2155, 13 pages.

Bunch, T. E., Keil, Klaus (1971) Chromite and ilmenite in non-chondritic meteorites. American Mineralogist, 56 (1-2) 146-157

Gooley, R., Moore, C. B. (1976) Native metal in diogenite meteorites. American Mineralogist, 61 (5-6) 373-378

Bowman, L. E., Spilde, M. N. & Papike, P. P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)

Bowman, L. E., Papike, J. J. & Spilde, M. N. (1999) Diogenites as asteroidal cumulates: Insights from spinel chemistry: American Mineralogist: 84 (7-8): 1020–1026. (July-August 1999)

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

Domanik, K. J., Sideras, L. C. & Drake, M. J. (2005) Olivine and Ca-Phosphate in the Diogenites Manegaon and Roda: Lunar and Planetary Science Conference XXXVI, abstract no.2128. (March 2005)

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

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Shalka meteorite, Bankura District, West Bengal, IndiaiRegional Level TypesShalka meteoriteMeteorite Fall Location Bankura DistrictDistrict West BengalState IndiaCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

Meteorite/Rock Types Recorded

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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

Shalka meteorite, Bankura District, West Bengal, India i
Regional Level Types
Shalka meteorite Meteorite Fall Location
Bankura District District
West Bengal State
India Country