| 词条 | Santa Vitoria do Palmar meteorite |
| 释义 |
|Name = Santa Vitoria do Palmar meteorite |Alternative names = |Image = |Image_caption = |Type = Ordinary chondrite[1] |Class = L3 |Clan = |Group = |Grouplet = |Subgroup = |Structural_classification = |Parent body = |Composition = Olivine (Fa0.5–35.2), pyroxene (Fs0.5–31.6) |Shock = S4 |Weathering = W2 |Country = Brazil |Region = Santa Vitoria do Palmar |Lat_Long = {{coord|33|30|34|S|53|24|39|W|display=inline,title}} |Observed_fall = Yes |Fall_date = 1997-06-25 |Found_date = 2003-03 & 2004-02 |TKW = {{Convert|50.4|kg}} |Image2 = |Image2_caption = }} 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] HistoryOn 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|2012|12}}, pieces of the Santa Vitoria do Palmar meteorite were advertised online at around {{US$|8}}/g.[3]MineralogyThe 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 {{convert|0.2|-|1.0|mm}} with the largest being {{convert|4.5|mm}} 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] ClassificationThe 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
References1. ^1 2 {{cite web|title=Santa Vitoria do Palmar|url=http://www.lpi.usra.edu/meteor/metbull.php?code=35478|work=Meteoritical Bulletin Database|publisher=Meteoritical Society|accessdate=23 December 2012}} {{Meteorites}}{{Meteorites by name}}2. ^{{cite web|last=Buhl|first=Dr. Svend|title=Santa Vitoria do Palmar meteorite|url=http://www.niger-meteorite-recon.de/en/Santa-Vitoria-meteorite-1.htm|publisher=Meteorite Recon|accessdate=23 December 2012}} 3. ^{{cite web|title=Santa Vitoria do Palmar, L3|url=http://www.fallsandfinds.com/page21.php|accessdate=23 December 2012}} 4. ^1 {{cite journal|last=Zucolotto|first=Maria Elizabeth|author2=Loiva Lizia Antonello |title=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|journal=Arquivos do Museu Nacional|year=2008|volume=66|pages=611–629|url=http://www.museunacional.ufrj.br/CP/Arquivos/Arq662008/Arq6634/izucoloto.pdf|accessdate=26 December 2012}} 2 : Chondrite meteorites|Meteorites found in Brazil |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。