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榴辉岩石榴石-单斜辉石(Gt-Cpx)地质温度计常用于研究超高压变质作用p-t条件。业已存在多种Gt-Cpx温度计算公式和绿辉石Fe2+校正方法,本文通过碧溪岭地区浅色及深色2种榴辉岩p-t条件计算,对几种常见温度计算公式和绿辉石Fe2+校正方法进行比较,认为Droop(1987)电价平衡法和Ravna(2000)温度计算公式最适合榴辉岩的温度计算。计算结果表明,碧溪岭地区浅色榴辉岩峰期变质p-t条件为3.0～3.4GPa和660～731℃。
The eclogite garnet-clinopyroxene (Gt-Cpx) geothermometer is often used to study p-t conditions for UHP metamorphism. There are a variety of Gt-Cpx temperature calculation formulas and omphacite Fe2 + calibration methods. Based on the pt conditions of two light eclogites and dark eclogites in Bixiling region, several common formulas for temperature calculation and omphacite Fe2 + Correction method, the Droop (1987) price balance method and the Ravna (2000) temperature calculation formula are most suitable for the eclogite temperature calculation. The calculated results show that the peak p-t metamorphism of light eclogite in Bixiling area is 3.0 ~ 3.4GPa and 660 ~ 731 ℃.