研究表明，在大别超高压变质岩的折返过程中，超高压变质岩一方面要经受中下地壳所特有的角闪岩相退变质作用，另一方面要在合适环境下发生部分熔融作用．超高压变质岩在中下地壳的减压退变和部分熔融作用，是一个重要的物理化学过程，它可以降低岩石的强度，提高岩石的可变性，促进挤压（ 碰撞） 体制向伸展体制的转变．超高压变质岩折返过程减压退变和部分熔融作用的确定，进一步支持了“原地”观点．它不仅说明了超高压榴辉岩和围岩片麻岩（ 即所谓的超高压片麻岩） 及面理化含榴花岗岩（ 非高压围岩） 之间的演化关系，而且可为正确地建立大别超高压变质岩折返的动力学模型提供科学的依据．一般来说，供给地壳岩石重熔作用的热量不能仅依赖地壳本身，还必须有其他支撑，我们推断由陆陆碰撞所造成的岩石圈增厚及岩石圈的拆沉作用和岩浆底侵作用，是驱动地壳重熔的主要因素 The study shows that during the reenforcement of the Dabie UHP metamorphic rocks, UHP metamorphic rocks are subjected to the metamorphism of amphibolite, which is characteristic of the middle and lower crust, on the one hand, and partially melted under the right conditions on the other. Depression and partial melting of ultrahigh-pressure metamorphic rocks in the middle and lower crust are important physical and chemical processes that can reduce the strength of rocks, increase the variability of rocks and promote the compression (collision) regime to the extensional system change. Decompression degeneration and partial melting of the UHP metamorphic rocks during the folding back further confirmed the “in situ” view. It not only illustrates the evolutionary relationship between ultrahigh-pressure eclogites and surrounding gneiss, the so-called ultra-high-pressure gneiss, but also the intergranular granitic pluton (non-high-pressure wall rock) Do not provide a scientific basis for the kinetic model of the reentry of ultrahigh-pressure metamorphic rocks. In general, the heat supplied to the crustal rocks for remelting can not depend on the crust itself alone, and must be supported by others. We infer the lithospheric thickening caused by land-continent collisions and delamination of the lithosphere and the magmatic underplating, Is the main factor driving the crust remelting