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本文对前人使用的火山喷发过程中岩浆脱气率和脱气量的估算方法进行了评述,并介绍了如何利用岩石学方法估算火山喷发不同阶段岩浆脱气率和脱气量的具体步骤,同时以镜泊湖地区全新世火山为例说明利用该方法估算的具体过程。估算结果表明不同气体在火山喷发过程中的脱气率是不同的,不能用包裹体中挥发分相对含量的高低来判断火山喷发所释放到大气圈中的气体类型和质量。该方法对火山学的研究具有重要意义。
In this paper, the estimation methods of magma degassing rate and degassing volume in volcanic eruption process used by predecessors are reviewed, and how to estimate the degassing rate and degassing volume of magma at different stages of volcanic eruption by using petrology is introduced. At the same time, Taking the Holocene volcano in Jingpohu area as an example, the specific process estimated by this method is illustrated. The estimation results show that the degassing rates of different gases during volcanic eruption are different. Therefore, the type and mass of gas released from the volcanic eruption into the atmosphere can not be judged by the relative content of volatiles in the inclusions. This method is of great significance to the study of volcanology.