Low Grade Regional Metamorphism: Mineral Equilibrium Relations

摘要: in experimental techniques that have extended the range of study to lower temperatures and pressures, theory permitting phase equilibria involving mixed volatile components be made under calibrated conditions. Thus a new review seems justified. In this paper, "low grade regional metamorphism" encompasses geologic conditions processes interpreted or known not too far removed from those prevailing at earth's surface; low metamorphism grades into diagenesis as approach surface, many mineralogic transformations usually considered diagenetic will discussed here. For pelitic rocks, upper cutoff our discussion biotite grade; for impure carbonate tremolite-bearin g marbles;