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本文根据甘肃敦煌地区广泛出露在太古宙TTG杂岩中的一套副变质岩系的岩石组合、典型矿物组合、变质相特征和岩石化学特征的分析，认为它们是一套中深变质的碎屑岩-泥质岩-泥灰岩-碳酸盐建造，其中夹有少量的变质基性火山岩。原岩形成于具有基性火山作用的活动大陆边缘滨海-浅海环境。经过太古宙的区域高角闪岩相变质作用，形成孔兹岩系。
Based on the analysis of rock assemblages, typical mineral assemblages, metamorphic facies characteristics and petrochemical characteristics of a group of accessory metamorphic rocks widely exposed in the Archean TTG complex in Dunhuang, Gansu, we consider them to be a set of metamorphic crust Debris - Argillaceous - Marlite - Carbonate with a small amount of metamorphic basement volcanic sandstones. The original rock formed in the active continental margin with the basic volcanic edge of the coastal - shallow sea environment. After the Archean regional amphibolite facies metamorphism, the formation of khondalite series.