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地热系统惰性气体同位素地球化学是地热成因研究的重要手段。许多惰性气体同位素都可用于地热系统的研究中,主要目的为揭示热田的热源性质、深—浅层地热流体的内在联系和循环深度等。本文从惰性气体理化特点、样品采集、测试技术及数据等若干方面介绍了惰性气体研究方法;重点探讨了在自由气和溶解气两种形态下,热泉、喷气孔、热水井不同环境下的惰性气体采样方法;还介绍了成熟的惰性气体同位素的测试方法,即利用磁偏转静态真空质谱计分析测试方法;最后基于世界各地典型地热系统的惰性气体测试数据,讨论地热系统的气体来源判别,不同气源的混合比例计算等,进而确定地热流体循环深度。
Geothermal system inert gas isotope geochemistry is an important means of geothermal research. Many inert gas isotopes can be used in geothermal system research, the main purpose of revealing the thermal properties of the thermal field, deep - shallow geothermal fluid, the internal relations and depth of circulation. In this paper, inert gas research methods are introduced from aspects of physical and chemical characteristics of inert gas, sample collection, testing techniques and data. The study focuses on the different conditions of free gas and dissolved gas, hot springs, jet holes, hot wells Inert gas sampling method; also introduced a mature test method of inert gas isotopes, that is, the use of magnetic deflection static vacuum mass spectrometry analysis and testing methods; and finally based on inert gas test data typical geothermal systems around the world to discuss the geothermal system gas source discrimination , Different gas source mixture ratio calculation, etc., and then determine the geothermal fluid circulation depth.