摘要
This year marks the 25th anniversary of the discovery of coesite in metamorphic rocks of supracrustal origin. This initiated a revolution of the plate tectonics theory due to intensive studies of ultrahigh pres-sure metamorphism and continental deep subduction. The occurrence of coesite
This year marks the 25th anniversary of the discovery of coesite in metamorphic rocks of supracrustal origin. This initiated a revolution of the plate tectonics theory due to intensive studies of ultrahigh pressure metamorphism and continental deep subduction. The occurrence of coesite was first reported in 1984 by two French scientists, C. Chopin and D.C. Smith,
