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Hayes Center meteorite, Hayes Co., Nebraska, USA

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Latitude & Longitude (WGS84): 40° 31' 0'' North , 101° 1' 59'' West
Latitude & Longitude (decimal): 40.51667,-101.03333
Non-native locality type:Meteorite
Köppen climate type:Dfa : Hot-summer humid continental climate


Ordinary chondrite, black (L6)
Find, 1941; 4.5 kg

One of several meteorites reported to Nininger subsequent to a series of public lectures and informal discussions in SW Nebraska in the late 1930's. Inspections reveal indistinct chondrules and chondrule fragments within a shock-darkened, but largely equilibrated matrix. Compositionally, equilibrated olivine (Fa23) and low Ca-orthopyroxene ('hypersthene') are characteristic of the L-chondrite geochemical group. Mineralogically, the meteorite consists primarily of dominant olivine with pyroxene accompanied by minor troilite and Fe-Ni metal. Accessory chromite, ilmenite, and isocubanite have also been reported.

A U-He age of 383 Ma and a K-Ar age of 772 Ma indicate an important collision of an intermediate parent body (IMP) during the last eon — possibly as part of a major collision involving large numbers of today's L-group chondrites. A cosmic ray exposure (CRE) age of t ~ 30.0 Ma is likewise shared with a moderately large cohort of L6 chondrites which may be fragments of a much smaller earth-crossing meteoroid which has produced multiple meteorites during the past few tens of million years.

Like many meteorites collected by Harvey Nininger, a large portion of the original mass is at Arizona State University's Center for Meteorite Studies [0.968 kg in 2017].

Mineral List


6 valid minerals.

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References

Nininger, H.H. & Nininger, A.D. (1950) The Nininger Collection of Meteorites: A Catalogue and a History. Winslow, Arizona. 144 pages.

Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).

Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.

Graham, A. L., Bevan, A. W. R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.

Wasson, J. & Wang, S. (1991) The histories of ordinary chondrite parent bodies: U,Th-He age distributions. Meteoritics 26(2): 161-167. (June 1991).

Alexeev, V.A. (1998) Parent bodies of H and L chondrites: Times of catastrophic events. Meteoritics & Planetary Science 33(1). (Jan1998).

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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