Links between metamorphism and deformation in feldspar at mid-crustal conditions

JD Gardner
Feldspar is the most common mineral in the Earth’s mid-to-lower crust, and therefore exerts fundamental controls on crustal strength. However, due to the relatively complex chemistry of the feldspar series, particularly its temperature dependence on composition, interactions between metamorphism and deformation, and thus overall deformation behaviour, remain poorly understood. Metagabbroic rocks from a crustal-scale shear zone were studied using electron backscatter diffraction and transmission electron microscopy, to investigate the deformation behaviour of plagioclase at greenschist...
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