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蒙皂石的伊利石化是发生在成岩、低级变质以及中低温热液环境中最常见的化学反应之一。目前已有的蒙皂石向伊利石转变的动力学模型都是基于水热实验和沉积盆地热演化研究资料。在作为探索粘土矿物成因的天然实验室——现代活动地热区一直缺乏粘土矿物的动力学研究,而主要局限于粘土矿物作为地质温度计的认识上。本文以新西兰Taupo活动地热带为例,获得了活动地热区蒙皂石向伊利石转变的动力学模型,并由此确定了地热活动年龄。
Erlite formation of smectite is one of the most common chemical reactions occurring in diagenesis, low-grade metamorphism and low-medium temperature hydrothermal environment. At present, the kinetic models for the conversion of smectite to illite are based on hydrothermal experiments and thermal evolution of sedimentary basins. As a natural laboratory for the exploration of the origin of clay minerals, geothermal areas of modern activity have been lacking in kinetic studies of clay minerals and are mainly confined to the understanding of clay minerals as geological thermometers. Taking the Taupo activity in the New Zealand as an example, this paper obtained the dynamic model of the active geothermal area from smectite to illite, and determined the geothermal activity age.