关键词: 地震波速, 岩石组成, 地壳, 上地幔, 云南

Abstract: Through the comprehensive studies of the metamorphic rocks outcropping on the surface, DSS data, and experimental data of rock seismic velocity under high temperature and high pressure, the rock constituents of the crust and upper mantle for Yunnan Province have been studied. This research indicates that the upper, middle and lower crust in Yunnan is composed of the metamorphic rocks of greenschist (sedimentary layer in the top part), amphibolite and granulite facies, respectively or granitoids, diorites and gabbros corresponding to them respectively, and that there exist the mafic eclogites in the bottom of the crust in some areas; and that the upper mantle is composed of peridotites and the crust-upper mantle transitional zone probably composed of the mafic eclogites and peridotites in some areas such as Lanping-Simao depression and Central Yunnan depression.

Key words: Seismic velocity, Rock constituent, Crust, Upper mantle, Yunnan