contact metamorphism


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contact metamorphism

n.
Metamorphism in which the mineralogy and texture of a body of rock are changed by exposure to the pressure and extreme temperature associated with a body of intruding magma. Contact metamorphism often results in the formation of valuable minerals, such as garnet and emery, through the interaction of the hot magma with adjacent rock.
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1987), based on oxygen and hydrogen isotope evidence for widespread element exchange between rock and fluid, revealed that basalts from the Skye Main Lava Series were locally affected by contact metamorphism associated with the intrusion of tertiary Cuillin Complex gabbros and Red Hills granites and hydrothermal alteration due to the convection system induced by such intrusions.
Massive magnetite (magnetite-quartz rock) is spatially related to remobilisation by contact metamorphism close to granite / pegmatite intrusives;
The settings where magnesite-rich rocks are affected by contact metamorphism or metasomatism are, therefore, truly rare.
Contact metamorphism related to intrusion of the pluton has resulted in a distinct alteration halo which hosts known mineralization.
The focus of this paper is to study overprinting contact metamorphism related to a small calc-alkaline intrusion in low to medium grade regional metamorphic rocks and to model the thermal effects of pluton emplacement at depths of less than 12 km.
Employing contact metamorphism to assess the conditions of pluton emplacement in southwestern Kellys Mountain, Cape Breton Island, Nova Scotia.
Ty-pe 3 alteration occurs mainly in the contact zone between the Huntington Mountain pluton and East Bay Hills Group, suggesting its development during contact metamorphism.