The elemental composition of Almahata Sitta
作者： Jon M. FRIEDRICH , Stephen F. WOLF , Douglas RUMBLE , Julianne TROIANO , Christopher J. L. GAGNON
DOI: 10.1111/J.1945-5100.2010.01105.X
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摘要: Abstract–We quantified up to 60 elements in four individual fragments (#4, #7, #15, and#47) of the Almahata Sitta meteorite, which entered Earth’s atmosphere on October 7,2008. is indisputably product asteroid 2008 TC 3 surviving passage through atmosphere. Each analyzed has aureilitic composition based comparisons with literature data. The fragmentsrepresent each major lithologies Sitta. Highly refractory siderophileelements are similarly enriched all Sitta, while volatile elementsshow more compositional variability. abundances rare earth (REE) onlyreach CI values case a single fragment (#15). More typically, REEabundances between 0.01 and 0.3 · CI. None fragmentsdisplays classic V-shaped REE pattern that often found ureilites. Given thatAlmahata was collected shortly after its fall, these results indicatethat many ureilites may be result extendedterrestrial residence times.INTRODUCTIONThe discovery, observation
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