Tectonic implications of transitional eclogite from haiyangsuo, rushan county, eastern shandong peninsula

摘要

Transitional eclogite were found recently at Haiyangsuo, Rushan County, and eastern Shandong Peninsula. It shown metamorphic transformation from granulite to plagioclase-bearing transitional eclogite. The Granulite-facies assemblage (Grt-I + Cpx-I + Opx + P1-I + Ilm) is equilibrated at temperature of 78-830 deg. C and pressure of 8-9 kbar. Its granular textures are well preserved in the less deformed rock. With the development of the shearing deformation accompanied by fluid infiltration during the transitional Eclogite facies, the granulitic assemblage transformed to a transitional eclogitic paragenesis (Cpx-II (Omp/Di) + Grt-II + P1-II (Ab)+ Rut + Qtz + Ky + Zo + Tlc) with various degree.