摘要
用中子活化分析测定了新陨岩庄陨石的主量和微量元素含量。陨石浅灰色相的微量元素化学特征与Ｈ６型相似。金属粒子中稀土元素相对富集，有非常明显的Ｅｕ正异常，与Ｈ６型比较以低的Ｂｒ，Ｚｎ含量和高的Ｆｅ、Ｎｉ、Ｉｒ、Ａｕ丰度为其特征。讨论了岩庄陨石在微重力影响下，微量元素宇宙化学特征与太空八面体Ｆｅ－Ｎｉ金属四同心环微晶体结构生长可能的内在联系。
The contents of the major and trace elements in the Yanzhuang meteorites have been determined by instrumental neutron activation analysis(INAA).The grey phase of the Yanzhuang meteorites and the H6-type meteorites have extremely similar trace element characteristics.In the Fe-Ni metallic phase, the rare-earth elements are enriched with significantly positive anomalies. As compared with the H6 type,the Yanzhuang meteorites are characterised by their lower content of Br & Zn and their higher abundance of Fe, Ni, Ir & Au. All these characteristics suggest that the four concentric-ring micro-crystallites growth patterns in the octahedron Fe-Ni metal phase might have some possible connection with the cosmochemical characteristics of the trace elements concerned during the nucleation and crystallisation processes under the micro gravity in space.
出处
《分析测试学报》
CAS
CSCD
1995年第2期7-11,共5页
Journal of Instrumental Analysis
基金
广东省自然科学基金
关键词
中子活化分析
岩庄陨石
四同心环
微晶体结构
Neutron activation analysis, Yanzhuang meteorites, Cosmochemical characteristics of elements,Micro gravity, Four concentric-ring micro-crystallite patterns.
