MAJOR AND TRACE ELEMENT CONCENTRATIONS FORCHONDRULES OF THE BOXIAN (LL4) CHONDRITEAND THEIR IMPLICATIONS
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摘要: 用仪器中子活化法分析了毫县(LL3-4)陨石中14个球粒的Al,Mg,Mn,Na,V,La,Sm,Au,Sc,Cr,Fe,Co,Ni,Eu,Ir等元素的含量。该陨石的球粒平均成分对Mg和Cl球粒陨石标准化值与其它不平衡普通球粒陨石一致。通过模糊聚类分析和因子分析讨论了元素间的相关关系。这些球粒的原始物质组分至少包括亲铁元素,难熔和中等难熔亲石元素以及中等挥发性元素等,这也与其它不平衡普通球粒陨石大体一致。因此,普通球粒陨石各化学群的差别主要是由基质造成的。Abstract: Al, Mg, Mn, Na, V, La, Sm, Eu, Sc, Cr, F , Ni, Co, Au and Ir concentrations for 14 ch-ondrules from the Boxian (LL4) chondrite are analyzel by INAA. The average hulk chon-drule compositions normalized to Mg and Cl chondrite for the Boxian chondrite are identical to the ones for other unequilibrated ordinary chondrites (UOC's). Relations among the element concentrations for chondrules from the Boxian chondrite are discussed using the clustering and factor analysis. Afew precusor chemical components are implied, that is siderophile elements, refractory and moderately refractory lithophile elements and moderately volatile elements etc. This conclusion is compatible to the results from the study of other UOC's.
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Key words:
- Boxian chondrite /
- Chemical composition /
- Precusor components /
- INAA
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