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超高压变质杂岩成因模式的关键是折返机制的解释 ,笔者将天文事件作为一种地球动力学模式来解释超高压变质杂岩的成因 ,较好地阐明了这个关键问题。该“天文模式”认为超高压变质杂岩分形成、折返和剥露三个阶段形成。天体撞击陆壳所产生的高温高压形成超高压变质杂岩 ;撞击后新的动力平衡使陆壳重熔的片麻岩里携超高压变质杂岩沿撞击形成的压力薄弱部位向地表折返运移 ;后期表层的剥蚀使超高压变质杂岩剥露。
The key of the genetic model of UHP metamorphic rocks is the explanation of the reentry mechanism. The author has explained the cause of the UHP metamorphic complexes by using the astronomical events as a kind of geodynamic model, which illustrates the key issue well. The “astronomical model” that the UHP metamorphic complex sub-formation, reentry and peel the formation of three stages. The high-temperature and high-pressure metamorphic rocks produced by the collision of the celestial bodies with the continental crust formed the UHP metamorphic complex; the new dynamic balance after the crust enabled the re-melting of gneiss in the continental crust to carry the ultra-high pressure metamorphic complex to the surface under the pressure, The denudation of the surface layer exposed the UHP metamorphic complex.