Vermillion meteorite

Vermillion
Type Achondrite, pallasite
Grouplet Pyroxene pallasite grouplet
Composition Meteoric iron (~86 %) silicates (~14 %)
Country USA
Region Kansas
Coordinates 39°44′11″N 96°21′41″W / 39.73639°N 96.36139°WCoordinates: 39°44′11″N 96°21′41″W / 39.73639°N 96.36139°W
Observed fall No
Found date 1991
TKW 34.36 kilograms (75.8 lb)

The Vermillion meteorite is a pallasite (stony-iron) meteorite and one of two members of the pyroxene pallasite grouplet.[1]

Discovery

The meteorite was found near and was named after Vermillion, Marshall County, Kansas. It was found by two farmers while planting on a grain field in 1991. It was recognized as a meteorite and first described in 1995.[2]

Mineralogy

Vermillion meteorite consists of around 86 volume-% meteoric iron and 14 % silicate minerals. The silicates include olivine (93% of silicates), orthopyroxene (5%), chromite (1.5%) and merrillite (0.5%).[3] Other accessory minerals include troilite, whitlockite,[1] and cohenite.[4]

Classification

The Vermillion meteorite is classified as a pyroxene pallasite because it contains pyroxene as an accessory mineral and shares a distinct oxygen isotope signature with Yamato 8451.[1] Some studies also object to this grouping, referring to the differences in siderophile trace elements and the occurrence of cohenite in the Vermillion meteorite.[4]

See also

References

  1. ↑ 1.0 1.1 1.2 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 17 October 2013. foreword by Richard P. Binze
  2. ↑ "Vermillion". Meteoritical Society.
  3. ↑ Boesenberg, J. S.; M. Prinz; M. K. Weisberg; A. M. Davis; R. N. Clyton; T. K. Mayeda (1995). "Pyroxene Pallasites: A New Pallasite Grouplet". Meteoritics 30: 488–489. Retrieved 29 December 2012.
  4. ↑ 4.0 4.1 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.