【摘要】 <正> 在球粒陨石群中顽火辉石球粒陨石具高度还原和独特的矿物学特征。顽火辉石球粒陨石几乎由纯的顽火辉石、金属(含有固溶体的硅)、硫化物及少量的斜长石、橄榄石和单斜辉石组成。硫化物矿物的组成相当复杂,普通球粒陨石(H、L及LL球粒陨石)的强亲石元素Ca、Cr、Ti、Mg、Mn、K在顽火辉石球粒陨石中呈硫化物相产出。最近我们在原有工作的更多还原

【Abstract】 In terms of its mineralogy, chemistry and textural characteristics, the Qingzhen meteorite should be assigned to EH₃ or type-Ⅰ enstatite chondrites. Two chondrules in Qingzhen contain olivine grains that have corroded outlines, dusty Fe-rich cores and clear Fe-poor rims. These dusty olivines appear to be relict grains that were only incompletely melted during the chondrule formation process and are similar to the dusty olivines in chondrules of highly unequilibrated ordinary chondrites. The dusty inclusions are Fe-rich（Fe 98%）. If the dusty metal inclusions were produced by reduction of the fayalitic component of the olivine, the occurrence of these grains inside the chondrules of EH₃ chondrites seems to imply that the chondrule precursor was initially more oxidized and that the reduction process occurred at a later stage,possibly during chondrule formation.更多还原