Hydrothermally altered epidote- and quartz-bearing rock
Epidosite (/ɪˈpɪdəsaɪt/) is a highly altered
epidote and
quartz bearing rock.[1] It is the result of slow
hydrothermal alteration or
metasomatism of the
basalticsheeted dike complex and associated
plagiogranites that occurs below the massive sulfide ore deposits which occur in
ophiolites.[2][3] Most epidosites represent the zone of intense metal leaching below and lateral to the sulfide deposits which is the result of convection of heated ocean water through the fractured basalts of the sheeted dikes.[2][3]
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abLori Bettison-Varga, Robert J. Varga and Peter Schiffman, Relation between ore-forming hydrothermal systems and extensional deformation in the Solea graben spreading center, Troodos ophiolite, Cyprus, Geology, 1992, v. 20 no. 11 p. 987-990