astro.wikisort.org - 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
Type	Ordinary chondrite[1]
Class	L3
Composition	Olivine (Fa0.5–35.2), pyroxene (Fs0.5–31.6)
Shock stage	S4
Weathering grade	W2
Country	Brazil
Region	Santa Vitoria do Palmar
Coordinates	33°30′34″S 53°24′39″W
Observed fall	Yes
Fall date	1997-06-25
Found date	2003-03 & 2004-02
TKW	50.4 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^[update], 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]

See also

• Glossary of meteoritics

References

На других языках

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[de] Santa Vitoria do Palmar (Meteorit)

Santa Vitoria do Palmar ist der 53. Meteoritenfund aus Brasilien.

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- [en] Santa Vitoria do Palmar meteorite

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