a particular feature of biotite grains from some of the canadian appalachian granitic rocks is the presence of lenses of ca-al silicates developed along cleavage planes. these from the more to less common are prehnite, pumpellyite and grandite garnet, an intermediate composition between andradite and grossular. rarely all three minerals can be observed together in one single biotite grain. micr...

A particular feature of biotite grains from some of the Canadian Appalachian granitic rocks is the presence of lenses of Ca-Al silicates developed along cleavage planes. These from the more to less common are prehnite, pumpellyite and grandite garnet, an intermediate composition between andradite and grossular. Rarely all three minerals can be observed together in one single biotite grain. Micr...

Exhumed faults in granitoids along the Lanterman Fault-Rennick Graben Fault system (northern Victoria Land, Antarctica) show superposed ductile to brittle deformation and pervasive hydrothermal fluid-rock interaction. These processes triggered multiple slip events producing crosscutting epidote prehnite-rich fault veins, ultracataclasites pseudotachylytes of crushing origin. Combined microstruc...

Apophyllite, analcite, chabazite, prehnite and stilbite are described from pectolite-, chlorite-, calciteand quartz-bearing veins and joint coatings in the late Carboniferous quartz dolerite of the Whin Sill of the northern Pennines. These veins represent the final hydrothermal stages in the sill's emplacement and are not related to the widespread lead-zinc-barium-fluorite mineralization of the...

The Kongsberg and Bamble lithotectonic domains of SE-Norway are known as classical Precambrian high-grade metamorphic terrains. area has undergone extensive metasomatism with formation albitites scapolite-rich rocks numbers previously economically important deposits including the Silver Modum Cobalt mines. We demonstrate here that central part domain (Kragerø area) locally developed low-grade m...

Low-grade metamorphic hydrous minerals and carbonates occur in various settings on Mars Martian meteorites. We present constraints the stability of prehnite, zeolites, serpentine, by modeling influence H2O-CO2 fluids during low-grade metamorphism crust using compositions a basalt an ultramafic cumulate. In basaltic with 5 wt% fluid, our models predict prehnite less oxidized, CO2-poor conditions...