摘要
本文简略回顾了堇青石-石榴石-矽线石-石英地质温压计的研究历史,并介绍由Aranovich等人完成的最新实验研究。以内蒙古南部贺兰山群的麻粒岩相矽线石榴堇青片麻岩的温压计算为例,用Aranovich等人实验标定的温压计计算结果与石榴石-堇青石Fe-Mg交换反应温度计和石榴石-斜长石-矽线石-石英压力计的计算结果相当吻合;而应用含有假定的热力学参数的哈奇森的温压计与其它温压计计算结果有较大差别,温度明显偏低,与岩石形成于麻粒岩相变质条件这一地质事实不符。
This paper briefly reviews the study history of cordierite-garnet-silliman-ite-quartz geothermobarometer, and then introduces an experimentai calibration by Aranovich et al. As an example of application to the sillimanite-garnet-cordierite gneiss of granulite facies from the Helanshan Group of southern Inner Mongolia, the estimate of Aranovichs geothermobarometer is consistent with that obtained by means of garnet-cordierite Fe-Mg exchange reaction geothermometer and garnet-plagioclase-sillimaaite-quartz geobarometer. The estimate of the Hutchesons geothermometer, however, differs from others and thus is in contradiction to the metamorphic condition of granulite facies.
关键词
地质
温压计
实验标定
变质岩石学
geothermometer, garnet-cordierite geothermometer, metamorphic petrology, Helanshan Group
