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鈦輝無粒隕石

鈦輝無粒隕石(Angrite)
— 群 —
"NWA 2999"的一面。請注意和地球的玄武岩相似。
成分類型 石隕石
類型 無球粒隕石
母體 可能是小行星(289) Nenetta、小行星(3819) 羅賓遜水星
已知樣本數 12

鈦輝無粒隕石(Angrites)是一群罕見的無粒隕石,其組成的礦物多數是輝石與一些橄欖石鈣長石隕硫鐵。這個群的名稱來自安格拉杜斯雷斯隕石(Angra dos Reis meteorite)。

鈦輝無粒隕石是玄武岩類的岩石,通常有直徑可以達到2.5厘米(0.98英寸)的多孔狀結構的孔隙

它們是最古老的火成岩岩石,大約在45億5000萬年形成結晶

來源

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通過比較鈦輝無粒隕石與幾顆主帶小行星光譜反射能力,已經確認了兩個可能的母體:小行星(289) Nenetta(3819) 羅賓遜。其他的科學家聲稱鈦輝無粒隕石也可以來自水星噴發

值得注意的隕石

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目前只有12顆隕石歸類為鈦輝無粒隕石。此群的樣本,安格拉杜斯雷斯隕石,是在1869年被觀測到墜落,重量為1.5公斤(3.3英磅),是第四大的鈦輝無粒隕石。另外三顆大隕石是16.55公斤(36.5英磅)的D'Orbigny、2.71公斤(6.0英磅)的"Sahara 99555"、和2.14公斤(4.7英磅)的"NWA 4931"[1]

相關條目

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外部連結

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參考資料

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  1. ^ Meteoriticial Society Database. Meteoritical Society. [2 January 2013]. (原始内容存档于2013-06-29). 
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鈦輝無粒隕石
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