Bells meteorite, Grayson Co., Texas, USA
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|Latitude & Longitude (WGS84):||33° 36' North , 96° 28' West|
|Latitude & Longitude (decimal):||33.60000,-96.46667|
|Non-native locality type:||Meteorite|
|Meteorite Class:||Ungrouped C2 chondrite meteorite|
|Meteoritical Society Class:||C2-ung|
|Metbull:||View entry in Meteoritical Bulletin Database|
|Köppen climate type:||Cfa : Humid subtropical climate|
Classification: Carbonaceous Chondrite, Ungrouped (C2-ung; S1)
Fall, 9 Sept 1961; 283 g, 7 pieces
After a fireball and detonations over northeastern Texas, the next day a single fragment was recovered which had struck a roof. The other fragments were picked up over the next six months (and subsequent weathering). The meteorite was immediately recognized as a Carbonaceous Chondrite, was first labeled as a more-or-less normal Type II meteorite, and then as a CM (Mighei-like) Carbonaceous Chondrite as classification standards evolved. Indeed, like many CMs Bells has its expected complements of chondrules, clasts, fine-grained materials, and (small) refractory inclusions. But, as more studies were made it became clear that Bells’ bulk chemistry and isotopic ratios do not match any of the 8 presently defined Carbonaceous Chondrite groups.
Indeed, Bells is quite unusual in several respects. Its microscopic niches contain several varieties of titanium oxide (including well-ordered ‘Magneli phases’), some presolar aromatic globules [similar to those found in Comet Wild 2], and minute pockets of very anomalous Nitrogen [unusually high in N-15].
12 valid minerals.
Meteorite/Rock Types Recorded
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Monnig, O. E. (1963). The Bells, Texas, Meteorites. Meteoritics 2, #1, p. 67. (May 1963)
Davis, A. M. & Olsen, E. (1984). Carbonaceous Chondrite Related to c1 and c2 Chondrites (Abstract). Lunar and Planetary Science XV, 190-191. (March 1984)
Brearley, A. J. (1993). Occurrence and possible significance of rare Ti oxides (Magneli phases) in carbonaceous chondrite matrices. Meteoritics 28 (4): 590-595. (Sept 1993)
Kallemeyn, G. W. (1995) Bells and Essebi: To Be or Not To Be (CM). Meteoritics 30 (5): 525-526. (Sept 1995)
Brearley, A. J. & Jones, R. H. (1998). Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. 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.
Clemett, S. J., Messenger, S., Nakamura-Messenger, K. & Thomas-Keprta, K. L. (2014): Coordinated Chemical and Isotopic Imaging of Bells (CM2) Meteorite Matrix. 45th Lunar and Planetary Science Conference. LPI Contribution No. 1777, p. 2896. (March 2014).
Howard, K.T., Alexander, C.M.O'D, Schrader D.L. & Dyl K.A. (2015) Classification of hydrous meteorites (CR, CM, and C2 ungrouped) by phyllosilicate fraction: PSD-XRD modal mineralogy and planetismal environments. Geochimica et Cosmochimica Acta 149, 206-222.