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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This research points to heat from the molten rock affecting other sediment in a process called contact metamorphism, "likely liberating the massive greenhouse gas volumes needed to drive extinction.
2007) and the contact metamorphism of limestones affected by basic sills (Kemp et al.
The humite-group minerals have a limited paragenesis and occurs in marbles and skarns generated by contact metamorphism.
Contact metamorphism of the Halifax Formation on the southeastern margin of the Halifax Pluton, Halifax, Nova Scotia.
1983) as a partial resetting of fission-track ages by contact metamorphism during emplacement of the Hunza Batholith (106-95 Ma, U-Pb zircon age) and also by subsequent Eocene regional metamorphism at the time of the Indo-Eurasian collision.
Massive magnetite (magnetite-quartz rock) is spatially related to remobilisation by contact metamorphism close to granite / pegmatite intrusives;
Hewitt (1970) argues that the magnetite/silicate mineralization along the quartzite-limestone boundary resulted from a combination of contact metamorphism and simultaneous hydrothermal activity, and that in the most highly altered zones the original magnesium-rich limestone was wholly replaced by magnetite, staurolite, actinolite.
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.
Employing contact metamorphism to assess the conditions of pluton emplacement in southwestern Kellys Mountain, Cape Breton Island, Nova Scotia.
2003): Anomalous reverse zoning of saponite and corrensite caused by contact metamorphism and hydrothermal alteration of marly rocks associated with subvolcanic bodies.