Carbonaceous Chondrite [CO3.8]
Find, 1970. A 23 kg individual was found about 100 km SW of Isna, on the Nile River near Luxor.

Isna is the 5th largest of the CO [Ornans-like] meteorites. All Carbonaceous Chondrites are defined by their bulk Mg-Si and oxygen isotope ratios. Within this framework, the CO chemical group is distinguished by small chondrules and refractory inclusions. All 400+ recognized CO stones are classified as CO3 because they contain glass. However, Isna is one of only 3 CO’s of petrologic type CV3.8.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

13 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

ⓘ 'CO3.8 chondrite meteorite'

Detailed Mineral List:

ⓘ Anorthite

Formula: Ca(Al₂Si₂O₈)

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Clinoenstatite

Formula: MgSiO₃

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ 'Clinopyroxene Subgroup'

Reference: Methot, R. L., Noonan, Albert F., Jarosewich, E. & Degasparis, A. A. (1974). The Isna meteorite - a C3 find from Egypt. Meteoritics 9 (4): 381-382. (Dec 1974)

ⓘ Diopside

Formula: CaMgSi₂O₆

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Enstatite

Formula: Mg₂Si₂O₆

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ 'Fayalite-Forsterite Series'

Description: Fa 34-39 in inclusions, but reaches Fa55 in matrix

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Gehlenite

Formula: Ca₂Al[AlSiO₇]

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Hercynite

Formula: Fe²⁺Al₂O₄

Reference: Methot, R. L., Noonan, Albert F., Jarosewich, E. & Degasparis, A. A. (1974). The Isna meteorite - a C3 find from Egypt. Meteoritics 9 (4): 381-382. (Dec 1974)

ⓘ Hibonite

Formula: CaAl₁₂O₁₉

Description: In CAIs [Calcium,Aluminium-rich inclusions]

Reference: Russell, S. S., Greenwood, R. C., Fahey, A. J., Huss, G. R. & Wasserburg, G. J. (1994). An ion microprobe study of CAIs from CO3 meteorites. Meteoritics 29 (4): 525-526. (Jul 1994)

ⓘ Iron

Formula: Fe

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Iron var. Kamacite

Formula: (Fe,Ni)

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

Description: In inclusions [Also, Cf. Methot et al.,(1974)

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

ⓘ Spinel

Formula: MgAl₂O₄

Description: In inclusions; Fe-rich with little compositional variation

Reference: Brearley, A. J. & Jones, R. H. (1998): Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)

ⓘ Taenite

Formula: (Fe,Ni)

Description: Found with troilite

ⓘ Troilite

Formula: FeS

Reference: Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Iron	1.AE.05	Fe
ⓘ	var. Kamacite	1.AE.05	(Fe,Ni)
ⓘ	Taenite	1.AE.10	(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
ⓘ	Troilite	2.CC.10	FeS
Group 4 - Oxides and Hydroxides
ⓘ	Hercynite	4.BB.05	Fe²⁺Al₂O₄
ⓘ	Hibonite	4.CC.45	CaAl₁₂O₁₉
ⓘ	Spinel	4.BB.05	MgAl₂O₄
Group 9 - Silicates
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Clinoenstatite	9.DA.10	MgSiO₃
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Enstatite	9.DA.05	Mg₂Si₂O₆
ⓘ	Gehlenite	9.BB.10	Ca₂Al[AlSiO₇]
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
Unclassified Minerals, Rocks, etc.
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Pyroxene Group'	-	ADSi₂O₆

List of minerals for each chemical element

O	Oxygen
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Clinoenstatite	MgSiO₃
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Enstatite	Mg₂Si₂O₆
O	ⓘ Gehlenite	Ca₂Al[AlSiO₇]
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Pyroxene Group	ADSi₂O₆
O	ⓘ Hercynite	Fe²⁺Al₂O₄
O	ⓘ Hibonite	CaAl₁₂O₁₉
O	ⓘ Spinel	MgAl₂O₄
Na	Sodium
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Clinoenstatite	MgSiO₃
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Enstatite	Mg₂Si₂O₆
Mg	ⓘ Spinel	MgAl₂O₄
Al	Aluminium
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Al	ⓘ Gehlenite	Ca₂Al[AlSiO₇]
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Al	ⓘ Hercynite	Fe²⁺Al₂O₄
Al	ⓘ Hibonite	CaAl₁₂O₁₉
Al	ⓘ Spinel	MgAl₂O₄
Si	Silicon
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Clinoenstatite	MgSiO₃
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Enstatite	Mg₂Si₂O₆
Si	ⓘ Gehlenite	Ca₂Al[AlSiO₇]
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Pyroxene Group	ADSi₂O₆
S	Sulfur
S	ⓘ Troilite	FeS
K	Potassium
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Ca	Calcium
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Gehlenite	Ca₂Al[AlSiO₇]
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ca	ⓘ Hibonite	CaAl₁₂O₁₉
Fe	Iron
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Iron var. Kamacite	(Fe,Ni)
Fe	ⓘ Troilite	FeS
Fe	ⓘ Hercynite	Fe²⁺Al₂O₄
Fe	ⓘ Taenite	(Fe,Ni)
Fe	ⓘ Iron	Fe
Ni	Nickel
Ni	ⓘ Iron var. Kamacite	(Fe,Ni)
Ni	ⓘ Taenite	(Fe,Ni)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Methot, R.L., Noonan, Albert F., Jarosewich, E., and Degasparis, A.A. (1974) The Isna meteorite - a C3 find from Egypt. Meteoritics, 9(4), 381-382. (Dec 1974)

Methot, R.L. et al. (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics, 10(2), 121-131. (Jun 1975)

Russell, S.S., Greenwood, R.C., Fahey, A.J., Huss, G.R., and Wasserburg, G.J. (1994) An ion microprobe study of CAIs from CO3 meteorites. Meteoritics, 29(4), 525-526. (Jul 1994)

Brearley, A.J. and Jones, R.H. (1998) Chondritic Meteorites. In: Planetary Materials (Papike, J.J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)

External Links

http://www.lpi.usra.edu/meteor/metbull.php

Other Regions, Features and Areas containing this locality

African PlateTectonic Plate

Upper Egypt basinBasin

Egypt

Western DesertDesert

North Africa

Sahara DesertDesert

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Isna meteorite, New Valley Governorate, EgyptiRegional Level TypesIsna meteoriteMeteorite Fall Location New Valley GovernorateGovernorate EgyptCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

References

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Other Regions, Features and Areas containing this locality

Isna meteorite, New Valley Governorate, Egypt i
Regional Level Types
Isna meteorite Meteorite Fall Location
New Valley Governorate Governorate
Egypt Country