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顽火辉石球粒陨石是极端还原条件下的星云凝聚产物。它有两个亚群:高铁群(EH群)和低铁群(EL群)顽火辉石球粒陨石。EH群存在EH3、EH4和EH5三种类型,EL群仅有EL6型。非平衡顽火辉石球粒陨石近似代表太阳星云最内缘部分星云凝聚和吸积形成的原始天体物质,而平衡型顽火辉石球粒陨石则是原始凝聚和吸积物质的后期热变质产物。清镇陨石是热变质程度最浅的非平衡高铁群3型顽火辉石球粒陨石(EH3),虽然其总体化学组成与
Stony pyroxene chondrules are nebular condensation products under extreme reduction conditions. It has two subgroups: the high-speed rail group (EH group) and the low-iron group (EL group) enstatite chondrules. EH group exists EH3, EH4 and EH5 three types, EL group only EL6 type. Unbalanced enstatite chondrite approximates the original celestial material formed by condensation and accretion of the innermost part of the solar nebula, while the equilibrium enstatite chondrite is the late thermal deterioration of the original coalescence and accretion material product. Qingzhen meteorite is the third-type enstatite (EH3) of non-equilibrium high-speed rail group with the lowest degree of thermal metamorphism although its overall chemical composition and