论文部分内容阅读
在地球内部,氢主要以羟基和分子水的形式存在于矿物和熔体中,构成各种活动和不活动的富水组分.对于含水矿物来说,氢主要占据正常的结构位置,是矿物化学式中不可或缺的一部分.对于名义上无水矿物来说,尽管其化学式中不含氢,但是在矿物结构位置和晶格缺陷中可以含有微量的结构水和分子水.矿物晶格缺陷中的流体/熔体包裹体可含有可观量的水.尽管名义上无水矿物的水含量很有限,通常在ppm量级,但是这些微量水对矿物乃至岩石体系的诸多物理化学性质均会产生极其显著的影响.伴随现代分析技术手段的不断改进和提高,针对名义上无水矿物中结构水含量及其氢同位素组成的探测表现为朝着更高的空间分辨率、更低的检出限以及多种分析方法综合应用的方向发展.迄今为止,显微红外光谱仍然是名义上无水矿物中结构水观察的最主要手段,此外离子探针、连续流质谱法和弹性反冲探测分析技术等亦得到了更广泛的应用.本文简要回顾近年来这些分析方法的研究进展及其应用情况.
Within the earth, hydrogen is mainly in the form of hydroxyl and molecular water in minerals and melts, forming a variety of active and inactive water-rich components. For hydrous minerals, hydrogen occupies the normal structural position and is a mineral For nominally anhydrous minerals, trace amounts of structural and molecular water may be present in mineral structure sites and lattice defects despite the absence of hydrogen in their chemical formulas. In mineral lattice defects Of the fluid / melt inclusions may contain appreciable amounts of water.While the nominal water content of anhydrous minerals is very limited, typically on the order of ppm, these traces of water produce extreme physical and chemical properties of minerals and even rock systems Significant impact.With the continuous improvement and improvement of modern analytical techniques, the detection of structural water content and its hydrogen isotope composition in nominally anhydrous minerals is toward higher spatial resolution, lower detection limits and A variety of analytical methods for the integrated application of the direction of development so far, microscopic infrared spectroscopy is still the name of anhydrous mineral water observation in the most important means, in addition to ion probe Continuous flow mass spectrometry and elastic recoil detection technology has also been more widely used. This paper reviews the research progress and application of these analytical methods in recent years.