亳县陨石矿物中包裹体的研究

A STUDY OF THE MINERAL INCLUSIONS IN BOXIAN METEORITE

通过对安徽亳县陨石矿物中包裹体的相态、成分和结构构造等研究可大致把它们分为晶质包裹体、熔融包裹体和气相包裹体三类。陨石的形成至少经历了星云凝聚—熔融—固态三个阶段。熔融阶段是陨石形成的一个重要阶段,其最低温度为1050℃～1200℃。各种类型包裹体成分的差异和分布不均匀性反映了原始熔浆成分的不均一性,也就是说“熔滴”在凝聚时化学成分和物理化学条件上的差异而导致陨石矿物中包裹体成分的差异,同时也反映了陨石矿物中包裹体在形成、演化过程中经历了多个阶段的特点。

The mineral inclusions in Boxian meteorite are divided into three groups: crystal, melt and gas inclusions, and the melt inclusions are subdivided into meltglass and melt-crystal inclusions. There are three steps, nebula condensation-meltsolid, during formation of Boxian meteorite and temperature in the melt-step is 1050℃～1200℃ at least. The different compositions and non-uniform distribution of inclusions show that the melt-material is not even and the mineral inclusions evolved through many steps.