Lawsonite remains stable up to 1080 �C and 9.4 GPa . the breakdown of lawsonite releases massive amounts of H2O into the mantle that can trigger partial melting of the slab and of the overlying mantle.
13.
Lawsonite remains stable up to 1080 �C and 9.4 GPa . the breakdown of lawsonite releases massive amounts of H2O into the mantle that can trigger partial melting of the slab and of the overlying mantle.
14.
Other examples of sorosilicates include lawsonite, a metamorphic mineral forming in the blueschist facies ( subduction zone setting with low temperature and high pressure ), vesuvianite, which takes up a significant amount of calcium in its chemical structure.
15.
Hydrated minerals ( e . g ., phlogopite, lawsonite, amphibole ) within the oceanic lithosphere become unstable at certain depths due to increased temperature and pressure, causing the crystal structure of the hydrated minerals break down and release water.
16.
Lawsonite eclogite is known from the U . S . ( Franciscan Complex of California; xenoliths in Arizona ); Guatemala ( Motagua fault zone ), Corsica, Australia, the Dominican Republic, Canada ( British Columbia ), and Turkey.
17.
Eclogites containing lawsonite ( a hydrous calcium-aluminium silicate ) are rarely exposed at Earth's surface, although they are predicted from experiments and thermal models to form during normal subduction of oceanic crust at depths between ~ 45-300 kilometers.
18.
:: : There are outcrops of the Franciscan Complex in the area, which includes blueschists ( at least in some places ) that have visible glaucophane and lawsonite, minerals that give it the characteristic blue colour ( mainly the glaucophane ), but I can't tell if this is what is in the picture . talk ) 22 : 45, 3 February 2011 ( UTC)
