glaucophane-schist facies
glaucophane-schist facies A set of metamorphic mineral assemblages produced by metamorphism of a wide range of starting rock types under the same high-pressure/low-temperature metamorphic conditions and typically characterized by the development of the mineral assemblage glaucophane—lawsonite—quartz in rocks of basic igneous composition. Other rocks of contrasting composition, for instance shales or limestones, would each develop their own specific mineral assemblage, even though they are all being metamorphosed under the same conditions. The variation of mineral assemblage with starting rock composition reflects a particular range of pressure, temperature and P(H2O) conditions. Experimental studies of mineral P—T stability fields indicate that the facies represents high-pressure/low-temperature conditions which can be met during subduction of oceanic crust under continental crust. Because rocks of basic igneous composition within this facies are characterized by the blue-coloured mineral glaucophane, the facies is sometimes referred to as the ‘blueschist facies’.
More From encyclopedia.com
Metamorphism , Metamorphism is the process by which the structure and mineral content of rocks transform in response to changes in temperature , pressure , fluid co… Metamorphic Rocks , Metamorphic rock is rock that has changed from one type of rock into another. The word metamorphic (from Greek) means “of changing form.” Metamorphic… Magma , Magma is molten rock within Earth that consists of liquids, gases, and particles of rocks and crystals. Magma has been observed in the form of hot la… Iron Ores , Rocks
Rocks are composed of minerals, which are natural inorganic (nonliving) substances with specific chemical compositions and structures. A rock m… Diagenesis , diagenesis All the changes that take place in a sediment at low temperature and pressure after deposition. With increasing temperature and pressure,… Partial Melting , A process known as partial melting generates the molten rock , known as magma , that cools to form crystalline rocks in the earth's outer composition…
You Might Also Like
NEARBY TERMS
glaucophane-schist facies