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Leedey meteorite, Dewey Co., Oklahoma, USA

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Latitude & Longitude (WGS84): 35° 52' 59'' North , 99° 19' 59'' West
Latitude & Longitude (decimal): 35.88333,-99.33333
Non-native locality type:Meteorite
Meteorite Class:L6 chondrite meteorite
Meteoritical Society Class: L6
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Cfa : Humid subtropical climate


Ordinary chondrite, (L6; S3; W0)
Fell, 25 November 1943; 51.5 kg


During the early evening (~ 7PM) a bright fireball was seen traveling for ~ 400 km over a northwestwardly path from north central Texas to south central Oklahoma where it broke apart near Leedey, Oklahoma. The meteorite fell during a period of wartime restrictions, but a dedicated search led mostly by the two renown meteorite hunters, Oscar Monnig and Harvey H. Nininger, resulted in the recovery of 24 separate stones over the next year. All of the stones were recovered along a narrow 17 km long strewnfield with the smallest piece (57 g) and largest piece (20.4 kg) found at the SE and NW ends, respectively, of the strewn field. As the pieces were recovered at different times and because of imperfect storage conditions a number of pieces are partially stained by iron oxides. However, they are not in the main terribly weathered.

The meteorite itself is classified as an L6 ordinary chondrites. Several analyses indicate bulk iron contents (~24.2 wt% Fe) plus olivine (Fa~25) and low Ca-pyroxene (Fs~21) compositions characteristic of the L chondrites. Texturally, the usually indistinct chondrules are intergrown within a recrystallized matrix. Mineralogically, the meteorite is dominated by olivine and pyroxene with minor albitic plagioclase grains[>50 µm], troilite, and Fe-Ni metal. Accessory chromite, phosphates and other minor silicates are also reported. Several indicators of significant shock (level S3) are present. Planar fractures and mosaicism in olivine, small shock pockets adjacent to metal, and metal grains containing finely dispersed troilite are most notable. Odd inclusions include a 6x8 mm composite metal-sulfide grain with pyrophanite and other phases.

The L (relatively low in total iron) chondrites are the largest group of ordinary chondrites and represent ~40% of the classified witnessed falls with the L6 petrologic type representing the great majority (~70 %) of the total L group). Leedey is the 18th largest of the 271 meteorite falls classified exactly as an L chondrite (as of May 2016). The largest portions of the Leedey meteorite were obtained by Walter Monnig and became part of the Monnig Collection at Texas Christian University. A 10.7 kg portion is held by the Center for Meteorite Studies at Arizona State University.


Mineral List


11 valid minerals.

Meteorite/Rock Types Recorded

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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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mason, B. (1963) Olivine Composition in Chondrites: Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
van Schmus, W.R. & Koffman, D.M. (1967) Equilibration Temperatures of Iron and Magnesium in Chondritic Meteorites: Science, New Series 155 (3765): 1009-1011. (Feb 1967).
Van Schmus, W.R. & Ribbe, P.H. (1968) The composition and structural state of feldspar from chondritic meteorites: Geochimica et Cosmochimica Acta 32(12): 1327-1342. (Dec 1968).
Crozaz G., Pellas, P., Bourot-Denise, M., de Chazal, S.M., Fieni, C., Lundberg, L.L. & Zinner, E. (1989) Plutonium, uranium and rare earths in the phosphates of ordinary chondrites—the quest for a chronometer: Earth and Planetary Science Letters 93: 157-169.
Rubin, A. (1990) Olivine & Kamacite in Ordinary Chondrites: Intergroup and Intragroup relationships. Geochimica et Cosmochimica Acta 54: 1217-1230.
Rubin, A.E. (1994) Metallic copper in ordinary chondrites. Meteoritics 29 (1): 93-98. (Jan 1994).
McCoy, T.J., Ehlmann, A.J. & Moore, C. B. (1997) The Leedey, Oklahoma, Chondrite: Fall, petrology, chemistry and an unusual Fe,Ni-FeS inclusion: Meteoritics32: 19-24. (Jan 1997).
Brearley, A.J. & Jones, R.H. (1998) Chondritic Meteorites. In: Planetary Materials (Papike, JJ - Ed.), Chapter 3: 1-398: Mineralogical Society of America, Washington, DC, USA.
Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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