| The Compositions of Six Chinese Ordinary Chondrites and Element Distributions in Their Different Phases |
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| 作者姓名： | 陈永亨 ERNSTPERNICKA |
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| 作者单位： | [1]GuangzhouBranch,InstituteofGeochemistry,AcademiaSinica,Guangzhou51640 [2]Max－Planck－InstitutfuerKernphys,InstituteofGeochemistry,AcademiaSinica,Guangzhou51640 |
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| 摘 要： | Six Chinese ordinary chondrites (four of them have fallen in recent years and the trace element abundances have not yet been reported for the other two) were examined.The contents of 21 elements (Na,Cr,Mn,Sc,Se,Zn,Br,Ni,Fe,Co,Ir,Cu,Ga,As,Au,Sb,Os,W,Re,Pt,and Ru)in the magnetic fractions and 20 elements (Na,K,Ca,Sc,Cr,Mn,Fe,Co,Ni,Zn,Se,Br,La,Sm,Eu,Yb,Lu,Ir,Au,and As) in the non-magnetic fractions were de-termined by INAA. The results indicate that the 5 H-group chondrites show almost no difference in composition,but they are different from the Zhaodong L-group chondrite in elemental abundance.As a normalized element(relative to CI),the concentrations of Ga in the magnetic fractions can be used to classify ordinary chondrites(H-,L- and LL-group).The bulk composition and modal weight of each component calculated from element concentrations in different phases are in good agreement with the bulk rock analyses presented in the literature.
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| 关 键 词： | 球粒状陨石 元素分布 示踪元素 仪器中子活化分析 钠 铬 锰 |
The compositions of six Chinese ordinary chondrites and element distributions in their different phases |
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| Chen Yongheng,Wang Daode,Ernst Pernicka.The Compositions of Six Chinese Ordinary Chondrites and Element Distributions in Their Different Phases[J].Chinese Journal of Geochemistry,1992,11(3):214-223. |
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| Authors: | Chen Yongheng Wang Daode Ernst Pernicka |
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| Institution: | (1) Guangzhou Branch, Institute of Geochemistry, Academia Sinica, 510640 Guangzhou;(2) Max-Planck-Institut für Kernphysik, 6900 Heidelberg, Germany |
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| Abstract: | Six Chinese ordinary chondrites (four of them have fallen in recent years and the trace element abundances have not yet been
reported for the other two) were examined. The contents of 21 elements (Na, Cr, Mn, Sc, Se, Zn, Br, Ni, Fe, Co, Ir, Cu, Ga,
As, Au, Sb, Os, W, Re, Pt, and Ru) in the magnetic fractions and 20 elements (Na, K, Ca, Sc, Cr, Mn, Fe, Co, Ni, Zn, Se, Br,
La, Sm, Eu, Yb, Lu, Ir, Au, and As) in the non-magnetic fractions were determined by INAA.
The results indicate that the 5 H-group chondrites show almost no difference in composition, but they are different from the
Zhaodong L-group chondrite in elemental abundance. As a normalized element (relative to CI). the concentrations of Ga in the
magnetic fractions can be used to classify ordinary chondrites (H-, L- and LL-group). The bulk composition and modal weight
of each component calculated from element concentrations in different phases are in good agreement with the bulk rock analyses
presented in the literature. |
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