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CONSTANT CHANGE. “Metasomatism: is a metamorphic process by which the chemical composition of a rock or rock portion is altered in a pervasive manner and which involves the introduction and/or removal of chemical components as a result of the interaction of the rock with aqueous fluids (solutions). During metasomatism the rock remains in a solid state.” https://lnkd.in/ecuZyBBT View in LinkedIn

“INFORMATION, be it classical or quantum, is intimately related to geometry.” https://lnkd.in/e2z5kfjz View in LinkedIn

METASOMATISM. “I would like you to look at it from a far broader viewpoint—as a universal process based on the fact that the minerals of all rocks are soluble in the fluids of nature, particularly water, but also in the mixed emanations from magmas, and on the fact that these fluids change the minerals to others, of different composition, stable under the particular conditions of pressure and temperature prevailing. Remove metasomatism and there would be very little left of metamorphism.” https://lnkd.in/enQ7UEgW View in LinkedIn

THE NARROW VIEW. “Perhaps I am right in saying that there is a general impression abroad that metasomatism is a sort of replacement of one mineral by another, with addition of material and mainly of importance in ore deposits.” (1925). https://lnkd.in/enQ7UEgW View in LinkedIn

BULK AQUEOUS CHEMISTRY. “Metasomatism is the drastic change in the bulk chemical composition of a rock, due to the introduction of chemicals from other surrounding rocks.” https://lnkd.in/eSpeQsqS View in LinkedIn

FRAGMENT FROM NATURE features a 1925 article by the prolific Waldemar Lindgren on metasomatism in geology. He “began a 31-year career with the U.S. Geological Survey, and then he was appointed head of the Department of Geology at the Massachusetts Institute of Technology. Also featured is an excellent article by a rare woman geologist, Dorothy Carroll, on aqueous processes in geology, at the heart of metasomatic processes. https://lnkd.in/ei_gnmMD View in LinkedIn

CRYSTAL ENERGETICS. “Dynamic recrystallization and recovery are fundamental processes in the crystal plastic deformation of rocks and minerals, whereby the elastic strain energy associated with linear lattice defects (i.e., dislocations) is minimized by the reorganization of those defects into low-energy configurations.” https://lnkd.in/e36ZB3JP View in LinkedIn

METAMORPHIC PROCESSES. “Dynamic recrystallization is an important process during deformation of many rock forming minerals, occurring under a wide range of metamorphic conditions. It can strongly influence mechanical properties and the development of microstructure.” https://lnkd.in/eR_euCnr View in LinkedIn

FAR FROM EQUILIBRIUM. “In the real world, the concentrations of dissolved species are often not at equilibrium with the minerals of the host rock. This is particularly true in carbonate rocks, where the nonequilibrium is a useful interpretive tool.” https://lnkd.in/eTGK5eZN View in LinkedIn

CHEMICAL EQUILIBRIA. “For any of these minerals, there is a certain equilibrium concentration, defined thermodynamically by the concentration at which the free energies of the species on both sides of the dissolution reaction balance exactly or kinetically where the rate of dissolution is equal to the rate of precipitation.” https://lnkd.in/eTGK5eZN View in LinkedIn