榴辉岩变质演化P-T轨迹研究新进展

榴辉岩研究是变质岩石学领域研究的热点与前沿,在解决高压和超高压变质作用、大洋和大陆地壳俯冲作用、碰撞造山作用等地质学问题和地球动力学研究中具有十分重要的意义。对榴辉岩研究的重要内容之一就是确定其变质P-T条件及其演化的P-T轨迹。本文对近年来在榴辉岩研究中确定榴辉岩变质P-T条件的方法-传统地质温压计方法和相平衡方法进行了简要的评述,着重分析了在大别山西段高压和超高压榴辉岩变质演化P-T轨迹研究方面所取得的最新进展。分析认为,榴辉岩变质演化P-T轨迹研究仍将是未来该领域的重要研究内容,而相平衡方法的运用则是其重要发展方向。

Latest progresses in the metamorphic P-T paths of eclogites

Research on eclogites is a hot and frontier issue in the metamorphic petrology field.It plays an important role in solving geological problems such as HP and UHP metamorphism,oceanic and continental crust subduction and collision orogeny and in geodynamic research.Determining the metamorphic P-T conditions and P-T paths is one important aspect of the eclogite studies.A brief comment on the methods determining metamorphic P-T conditions in recent eclogites research is given,including traditional geological geothermobarometers and phase equilibria method.The latest progresses of the metamorphic P-T paths of HP and UHP eclogites in western Dabieshan is analyzed emphatically.The analysis indicate that,in the future,the metamorphic P-T paths study about eclogites will still be an important research aspect in this field,and the development direction is to use the phase equilibria method.