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绪论变质岩石学对研究古造山带热构造的限制条件提供一种重要工具。通过表征岩石层序的特定岩相系列而绘出的等变线,可以推导出在单个地质事件中所引起的变质作用,许多作者都曾经做了以下工作:(1)沿着垂直于等变线面的横切面估算了最高的变质温度;(2)沿着这些横切面估算了压力的变化;(3)最后结合这些
Introduction The metamorphic petrology provides an important tool for studying the constraints of thermal structures in ancient orogenic belts. By isolating lines drawn from a series of lithofacies that characterize the lithosphere sequence, metamorphism induced in a single geological event can be deduced. Many authors have done the following: (1) The maximum metamorphic temperature is estimated from the cross-section of the line surface; (2) The pressure change is estimated along these cross-sections; (3) Finally, the combination of these