Blueschist

Blueschist is another name for glaucophane schist, which specifically refers to metamorphic rocks with minerals of glaucophane characteristics formed during high-pressure regional metamorphism. It has complex metamorphic mineral combinations and is characterised by the presence of glaucophane, magnesio-riebeckite, crossite, jadeite, jadeite pyroxene, and pumpellyite, and it often contains quartz, plagioclase, muscovite, actinolite, chlorite, epidote, zoisite and garnet. Blueschist often forms in association with eclogite and greenschist to form a unique rock combination. Detailed research has shown that blueschist forms under the conditions of high-pressure metamorphism and is often produced in high-pressure geological zones. Plate tectonics theory holds that blueschist forms in the subduction zones of oceanic plates towards continental plates, and blueschists are widely distributed in the Pacific Rim. There are also several blueschist outcrops in the Dabie-Sulu metamorphic belt in...