太阳星云凝聚过程的岩石学模型：（1）球粒陨石的凝聚成因

Petrological Model for Condensation Process of Solar Nebula:(1) Condensation Genesis of Chondrites

建立类地行星区太阳星云凝聚过程的岩石学模型，对于合理解释陨石、地球和类地行星的成因关系，探讨地球起源和估算地球的整体成分都有着重要意义。本文中根据天体化学和太阳系演化学说关于太阳星云物理化学条件的基本分析，以及实验凝聚岩石学的研究结果，推断在太阳星云盘的类地行星区中可能有星云的气－固和气－液－固两种凝聚作用发生。通过对球粒陨石中球粒和基质矿物成分及结构构造特征的对比，论证了绝大多数球粒的气－液－固凝聚成因和基质的气－固凝聚成因，并讨论了球粒陨石各化学群的凝聚成因模式。

in order to reasonably explain the origin relation between meteorites, Earth and terrestrial planets, to discuss the Earth's source and estimate earth's bulk composition, it is necessary to set up a Petrological model for condensation process of solar nebula in terrestrial planet region. In the paper (1), based on physical and chemical conditions of nebula from the cosmochemistry and evolution theory of solar system and experimental results of condensation Petrology, we infer that gas-solid condensation and gas-liquid-solid condensation of nebula could occur in terrestrial planet region of nebular disk. Through studies on mineral composition and structure of chondrules and matrix, the gas-liquid-solid condensation genesis of chondruls and gas-solid condensation genesis of matrix are proved and condensation genesis model for chemical groups of chondrites is discussed.