A Study of the Ungrouped Iron Meteorite and Its Silicate Inclusion
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摘要: 本文对Guin陨石进行了化学、矿物学和岩石学方面的研究,表明Guin是一块含有45μg/gGa和186μg/g Ge的难于分类的铁陨石,它是具有异常高镍含量(92.5mg/g)的粗八面体陨铁。它还包含有6±3vol.％硅酸盐包体。包体的组成类似于球粒陨石冲击而成的融体玻璃。因此,我们认为Guin是球粒陨石母体冲击熔融而形成的集合体。Abstract: In this paper,the Guin was chemically,mineralogically and petrologically investigated and the results show that the Guin is an ungrouped iron containing 45μg/g Ga and 186μg/g Ge.It is a coarse octahedrite with unusually high Ni (92.5mg/g).The Guin contains 6±3 vol.% silicate inclusions.The Guin inclusion is similar in composition to some melt glasses in ordinary chondrites produced in situ by shock compression.As a result,we suggest that the Guin assemblage formed by impact-melting on a chondrite parent body.
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