Pyroxene pallasite grouplet

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Pyroxene pallasite grouplet
— Grouplet —
Type Stony-iron
Class Pallasite
Composition Meteoric iron, silicate minerals (Pyroxene)
Total known specimens 2

The pyroxene pallasite grouplet is a subdivision of the pallasite meteorites (stony-irons).[1]

The grouplet is named "pyroxene pallasites" because they or the only pallasites that contain pyroxene. The grouplet was proposed in 1995.[2] It currently has only 2 members: the Vermillion and Yamato 8451 meteorite. Both meteorites contain pyroxene and have a number of other similarities: for example their pyroxene composition, rare earth element concentrations, and oxygen isotope ratios. However, there are also indicators against the grouping of these two meteorites: for example the texture and occurrence of cohenite in the Vermillion meteorite and the differing siderophile trace element concentrations.[2]

See also[edit]

References[edit]

  1. ^ M. K. Weisberg; T. J. McCoy, A. N. Krot (2006). "Systematics and Evaluation of Meteorite Classification". In D. S. Lauretta, H. Y. McSween, Jr. Meteorites and the early solar system II. Tucson: University of Arizona Press. pp. 19–52. ISBN 978-0816525621. Retrieved 15 December 2012. 
  2. ^ a b Boesenberg, Joseph S.; Davis, Andrew M.; Prinz, Martin; Weisberg, Michael K.; Clayton, Robert N.; Mayeda, Toshiko K. (1 July 2000). "The pyroxene pallasites, Vermillion and Yamato 8451: Not quite a couple". Meteoritics & Planetary Science 35 (4): 757–769. doi:10.1111/j.1945-5100.2000.tb01460.x.