Ordinary Chondrite, Low-Iron (L4)
Fell, 9 June 1954; 305.5 g

After falling very late on a long summer day a small meteorite (108.8 g) was immediately dug up with a somewhat larger fragment (196.7 g) found on the following day. These two meteorite fragments were purchased for 300 Swedish crowns each for Sweden's Museum of Natural History. The sounds of the arriving meteorite had been heard over a 100 km wide region and apparently delivered a number of smaller stones which were not collected. Olivine composition (Fa24), the presence of 'bronzite' pyroxene, and bulk iron (21 wt%) are all indicative of Hökmark's membership in the L (low bulk Fe) chondrite geochemical group. However, as a small 'ordinary chondrite' Hökmark has not been studied in great detail. The sounds of the incoming approach have, however, been reported in surprising detail for such an old fall [Cf. Liszka (2008)].

Hökmark is one of 9 witnessed Swedish falls listed at the Meteoritical Bulletin Database (as of October 2015). All 9 falls are ordinary chondrites, but only Hökmark and Ekeby have been classified as exactly 'L4' chondrites. Both specimens of Hökmark have been kept at the Museum of Natural History in Stockholm (Naturhistoriska riksmuseet).

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ 'Fayalite-Forsterite Series'

ⓘ Native Iron

ⓘ var. Kamacite

ⓘ 'Orthopyroxene Subgroup'

ⓘ 'Pyroxene Group'

1 valid mineral.

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

ⓘ L4 chondrite meteorite

Detailed Mineral List:

ⓘ 'Fayalite-Forsterite Series'

Description: Composition Fa24 and Fa23.9 according to Mason (1963) and Rubin (1990), respectively.

References:

Mason, Brian (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta, 27 (10) 1011-1023 doi:10.1016/0016-7037(63)90062-0

Keil, K. & Fredriksson, K. (1964) The Fe.Mg and Ca Distribution in Coexisting Olivines and Rhombic Pyroxenes of Chondrites. Journal of Geophysical Research Atmospheres 69 (16): 3487-3515. (August 1964)

Graham, A. L., Bevan, A. W. R., Hutchison, R. (1985) Catalogue of Meteorites - With Special Reference to those Represented in the Collection of the British Museum (Natural History) (4th ed.) British Museum (Natural History), London.

Rubin, Alan E. (1990) Kamacite and olivine in ordinary chondrites: Intergroup and intragroup relationships. Geochimica et Cosmochimica Acta, 54 (5) 1217-1232 doi:10.1016/0016-7037(90)90148-e

ⓘ Native Iron

Formula: Fe

References:

Rubin, Alan E. (1990) Kamacite and olivine in ordinary chondrites: Intergroup and intragroup relationships. Geochimica et Cosmochimica Acta, 54 (5) 1217-1232 doi:10.1016/0016-7037(90)90148-e

ⓘ Native Iron var. Kamacite

Formula: (Fe,Ni)

References:

Rubin, Alan E. (1990) Kamacite and olivine in ordinary chondrites: Intergroup and intragroup relationships. Geochimica et Cosmochimica Acta, 54 (5) 1217-1232 doi:10.1016/0016-7037(90)90148-e

ⓘ 'Orthopyroxene Subgroup'

References:

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

Description: Pyroxene appears to be mostly Ca-poor orthopyroxene, but Ca-poor and/or Ca-rich clinopyroxenes are possible (if not expected!).

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Iron	1.AE.05	Fe
ⓘ	var. Kamacite	1.AE.05	(Fe,Ni)
Unclassified
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Pyroxene Group'	-	ADSi₂O₆
ⓘ	'Orthopyroxene Subgroup'	-

List of minerals for each chemical element

O	Oxygen
O	ⓘ Fayalite-Forsterite Series
O	ⓘ Pyroxene Group	ADSi₂O₆
Mg	Magnesium
Mg	ⓘ Fayalite-Forsterite Series
Si	Silicon
Si	ⓘ Fayalite-Forsterite Series
Si	ⓘ Pyroxene Group	ADSi₂O₆
Fe	Iron
Fe	ⓘ Native Iron	Fe
Fe	ⓘ Native Iron var. Kamacite	(Fe,Ni)
Fe	ⓘ Fayalite-Forsterite Series
Ni	Nickel
Ni	ⓘ Native Iron var. Kamacite	(Fe,Ni)

Other Regions, Features and Areas containing this locality

Baltic Shield (Fennoscandian Shield)Shield

Eurasian PlateTectonic Plate

Baltic Shield
- Central Finland Arc ComplexVolcanic Arc

EuropeContinent

ScandinaviaRegion

Sweden

⭔Västerbotten ProvinceProvince

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

(n.d.) Meteoritical Bulletin Database. The International Society for Meteoritics and Planetary Science.

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/metbull.php?code=11893

Krinov, E.L. (1961) Meteoritical Bulletin, no.20. Moscow.

Mason, Brian (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta, 27 (10) 1011-1023 doi:10.1016/0016-7037(63)90062-0

Rubin, Alan E. (1990) Kamacite and olivine in ordinary chondrites: Intergroup and intragroup relationships. Geochimica et Cosmochimica Acta, 54 (5) 1217-1232 doi:10.1016/0016-7037(90)90148-e

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

Liszka, L. (2008) Listening to Meteors: Infrasonic Observations of Meteors in Northern sweden. IRF Scientific Report 295. (April 2008)

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