Santa Vitoria do Palmar meteorite

The Santa Vitoria do Palmar meteorite was found near the city of Santa Vitoria do Palmar in Brazil in 2003 (three stones) and 2004 (one stone).[1]

Santa Vitoria do Palmar meteorite
TypeOrdinary chondrite[1]
ClassL3
CompositionOlivine (Fa0.5–35.2), pyroxene (Fs0.5–31.6)
Shock stageS4
Weathering gradeW2
CountryBrazil
RegionSanta Vitoria do Palmar
Coordinates33°30′34″S 53°24′39″W
Observed fallYes
Fall date1997-06-25
Found date2003-03 & 2004-02
TKW50.4 kilograms (111 lb)

History

On 25 June 1997 at 07:00 local time a dramatic blue and green fireball and coal black smoke trail set against a clear blue sky was witnessed by many people in the area.[2]

The first three stones were found by Roberto Macielin while collecting Indian arrows in March 2003. The fourth by Lautaro Côrreira in February 2004.[1]

As of December 2012, pieces of the Santa Vitoria do Palmar meteorite were advertised online at around US$8/g.[3]

Mineralogy

The surface of the meteorite is covered in a fusion crust with several indentations (regmaglypts). The meteorite is almost entirely made from chondrules. They range in size from 0.2–1.0 millimetre (0.0079–0.0394 in) with the largest being 4.5 millimetres (0.18 in) in diameter. Both the matrix and chondrules contain olivine and pyroxene. Accessory minerals include meteoric iron (kamacite, taenite and plessite), magnetite, troilite, plagioclase, schreibersite, maskelynite and chromite.[4]

Classification

The meteorite is classified as an Ordinary chondrite of the L group. The petrologic type is 3. Shock stage is 3 or 4 and weathering is class 2.[4]

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See also

References
  1. "Santa Vitoria do Palmar". Meteoritical Bulletin Database. Meteoritical Society. Retrieved 23 December 2012.
  2. Buhl, Dr. Svend. "Santa Vitoria do Palmar meteorite". Meteorite Recon. Retrieved 23 December 2012.
  3. "Santa Vitoria do Palmar, L3". Retrieved 23 December 2012.
  4. Zucolotto, Maria Elizabeth; Loiva Lizia Antonello (2008). "Studies of Brazilian meteorites of the Museu Nacional I: Petrography and mineralogy of the Santa Vitória do Palmar, Rio Grande do Sul, L 3 chondrite meteorite" (PDF). Arquivos do Museu Nacional. 66: 611–629. Retrieved 26 December 2012.
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