【作者】 陶克捷； 杨主明； 张培善； 韩秀玲；

【Author】 TAO KeJie,YANG ZhuMing,ZHANG PeiShan and HAN XiuLing 1.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

【机构】 中国科学院地质与地球物理研究所；

【摘要】 东乌珠穆沁旗中铁陨石中有二种橄榄石。一种是陨石中基质橄榄石,另一种是镶嵌在陨石表面的角砾状橄榄石。电子探针成分分析结果表明,两种橄榄石中的FeO和MnO比值,包体矿物种类,包体铁纹石和镍纹石中Fe,Ni的含量等,均有较大区别。陨石中基质橄榄石矿物是本陨石中原物质,而角砾状橄榄石是宇宙中物质。他们是两块自由翱翔于宇宙中的物质碰撞混合而形成的东乌珠穆旗陨石中这种现象。更多还原

【Abstract】 Two types of olivine in the Dongujimqin mesosiderite were identified:the matrix olivine and the brecciform olivine.The electron microprobe analyses show that there are distinct differences between two types of olivine in the aspects of the FeO/MnO ratio,the species of inclusion minerals,the concentrations of Fe an Ni in kamacite and taenite inclusions.It indicates that the matrix olivine was from the host meteorite and the brecciform olivine was from the other cosmic substance. It is the collision and combination of two cosmic substances soaring separately in cosmos that formed the Dongujimqin mesosiderite.更多还原