估算上地幔温压条件与氧化状态的最新热力学方法

上地幔的温压条件与氧化状态,对于了解上地幔的热结构、物态与相关系、深部地质作用、特别是岩浆起源及超镁铁岩的成因具有重要的意义。本文概述了近年来新提出的估算尖晶石、石榴石二辉橄榄岩相矿物平衡的温度、压力和氧逸度的热力学方法,对于从事金伯利岩、蛇绿岩和上地幔橄榄岩包体的研究具有重要的实用价值。

NEW GEOTHERMOBAROMETERS APPLICABLE TO THE MANTLE ROCKS

During the recent years several series of phase equilibrium experiments on spinel, garnet therzolites have been done to calibrate the geothermobarometers, which are of critical importance for constructing T-p-fo2 regime of the upper mantle, and for understanding the mantle's magmatic processes. This paper gives a review to these thermodynamical methods, with particularly emphases on the T-p-composition limitations of the methods and the petro-genetical interpretations in practical applications.