Jalanash meteorite, Bayan-Ölgii Province, Mongolia i
Regional Level Types
Jalanash meteorite Meteorite Fall Location
Bayan-Ölgii Province Province
Mongolia Country

Classification: Ureilite, monomict.

A single 700 gram stone was found after falling on the Ölgiy Plain in Mongolia. The Jalanash fall was witnessed on August 15, 1990. Full mineralogical descriptions of Jalanash have not appeared in ready available publications, but microstructures in Jalanash pigeonite have been the object of some recent studies of Jalanash’s microstructures. Pigeonite is stable at ambient temperature only when cooled very rapidly.

Ureilites are known for their curious combination of cumulate silicates (mostly olivine and pyroxene) mixed with elemental carbon. The carbon itself is always an enigmatic graphite-diamond amalgam. The ureilites also usually contain a number of minor opaque minerals such as kamacite (meteoritic iron) and troilite. The ureilites are particularly intriguing because their microscopic textures may have been due to both vapor condensation and to shock impact. Both the relative importance and the timing of these nebular and collisional processes does not appear to be a settled matter at this time.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Diamond

ⓘ 'Fayalite-Forsterite Series'

ⓘ Graphite

ⓘ 'Orthopyroxene Subgroup'

ⓘ Pigeonite

ⓘ 'Pyroxene Group'

3 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

ⓘ Ureilite meteorite

Detailed Mineral List:

ⓘ Diamond

Formula: C

References:

I. Weber & Adolf Bischoff (1999). Microstructures in Pyroxenes from the Martian Meteorites Zagami and the Achondrites Bishopville (Aubrite), Hammadah Al Hamra 064, and Jalanash (Ureilites). Meteoritics & Planetary Science, vol. 34, Supplement, pp. A120-A121. (July1999).

ⓘ 'Fayalite-Forsterite Series'

References:

Jeffrey N. Grossman (1998). The Meteoritical Bulletin, No. 82,1998 July. Meteoritics & Planetary Science 33, Issue S4, pp. A221–A239.

ⓘ Graphite

Formula: C

References:

I. Weber, Adolf Bischoff & D. Weber (2003). TEM investigations on the monomict ureilites Jalanash and Hammadah Al Hamra 064. Meteoritics & Planetary Science, vol. 38, #1, 145-156. (Jan 2003).

ⓘ 'Orthopyroxene Subgroup'

References:

I. Weber, Adolf Bischoff & D. Weber (2003). TEM investigations on the monomict ureilites Jalanash and Hammadah Al Hamra 064. Meteoritics & Planetary Science, vol. 38, #1, 145-156. (Jan 2003).

ⓘ Pigeonite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

References:

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

References:

Jeffrey N. Grossman (1998). The Meteoritical Bulletin, No. 82,1998 July. Meteoritics & Planetary Science 33, Issue S4, pp. A221–A239.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Graphite	1.CB.05a	C
ⓘ	Diamond	1.CB.10a	C
Group 9 - Silicates
ⓘ	Pigeonite	9.DA.10	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Unclassified
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Pyroxene Group'	-	ADSi₂O₆
ⓘ	'Orthopyroxene Subgroup'	-

List of minerals for each chemical element

C	Carbon
C	ⓘ Diamond	C
C	ⓘ Graphite	C
O	Oxygen
O	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Fayalite-Forsterite Series
O	ⓘ Pyroxene Group	ADSi₂O₆
Mg	Magnesium
Mg	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Fayalite-Forsterite Series
Si	Silicon
Si	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Fayalite-Forsterite Series
Si	ⓘ Pyroxene Group	ADSi₂O₆
Ca	Calcium
Ca	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	Iron
Fe	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Fayalite-Forsterite Series

Other Regions, Features and Areas containing this locality

AsiaContinent

Altai MountainsMountain Range

Eurasian PlateTectonic Plate

Altai-Mongolia TerraneAccretionary Complex

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References

Grossman, Jeffrey N. (1998). The Meteoritical Bulletin, No. 82, 1998 July. Meteoritics & Planetary Science: 33: Issue S4: A221–A239.

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

Weber, Adolf Bischoff & D. Weber (2003). TEM investigations on the monomict ureilites Jalanash and Hammadah Al Hamra 064. Meteoritics & Planetary Science: 38(1): 145-156. (January 2003).

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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

Jalanash meteorite, Bayan-Ölgii Province, Mongolia i
Regional Level Types
Jalanash meteorite Meteorite Fall Location
Bayan-Ölgii Province Province
Mongolia Country