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Roy (1933) meteorite, Harding Co., New Mexico, USA

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Latitude & Longitude (WGS84): 35° 57' 0'' North , 104° 11' 59'' West
Latitude & Longitude (decimal): 35.95000,-104.20000
Non-native locality type:Meteorite
Meteorite Class:L5 chondrite meteorite
Meteoritical Society Class: L5
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:BSk : Cold semi-arid (steppe) climate

Ordinary chondrite,veins (L5; S3-5)
Found, 1933; 47.2 kg

During the spring a weathered stone was found and, suspecting precious minerals, it was broken up by an impatient amateur geologist. Barred olivine and radiating pyroxene as well as porphyritic chondrules (up to 2 mm in size) are present within an olivine-rich matrix. The Roy (1933) meteorite is unusual because it contains some shock-induced melt veins [Shock grade, S3-5] with recrystallizations and some exceedingly rare minerals (Majorite, Ringwoodite) that experiments suggest would exist on earth only deep within the earth's mantle [P-max ~18 GPa]. The unaltered olivine (Fa26.1) is typical of the L chondrite group. The meteorite is also quite weathered.

Moderately large masses have been kept at the Natural History Museum in London (~7.2 kg, including a 7108 g specimen), The Center for Meteorite Studies at Arizona State University (6.3 kg), the United States National Museum in Washington (2.6 kg), and the Geological Survey of India (1.1 kg). Several smaller sub-kilogram masses are held elsewhere. The small Harvard specimen examined by Ramdohr (1973) and still held there today [2016] was not listed in the Catalogue of Meteorites (2000).

What's in a name? Another separate meteorite ['Roy (1934)' — a 5.6 kg L6 stone] — was for some time considered to a fragment of the same meteorite.

(cf. The Meteorite Catalogue Database 2004, Natural History Museum, London).

Mineral List

11 valid minerals.

Meteorite/Rock Types Recorded

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Heineman, R.E.S. (1935) Petrography of the Roy, Harding County, New Mexico, meteorite: American Mineralogists 20(6): 438-442. (June 1935).

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

Lange, D. E. & Keil, K. (1976) Meteorites of Northeastern New Mexico: New Mexico Geol. Soc. Guidebook, 27th Field Conf., Vermejo Park: pp. 273-299.

Lange, D. E. & Keil, K. (1976) Notes on the chondrites from northeastern New Mexico: Meteoritics 11: 315-316.

Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.

Lewis, J.A. & Jones, R.H. (2016) Phosphate and feldspar mineralogy of equilibrated L chondrites: The record of metasomatism during metamorphism in ordinary chondrite parent bodies: Meteoritics & Planetary Science 51(10): 1886. (Oct 2016).

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