paragenesis

Paragenesis is a petrologic concept meaning an equilibrium assemblage of mineral phases. It is used in studies of igneous and metamorphic rock genesis and importantly in studies of the hydrothermal deposition of ore minerals and the rock alteration (vein metasomatism) associated with ore mineral deposits. The concept and application of paragenesis, from the Greek for born beside, was first applied by August Breithaupt in 1849 in his work Die Paragenesis der Mineralien.
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(n.)
The science which treats of minerals with special reference to their origin.
  

paragenesis
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Eng: paragenesis
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