地幔流体及其成矿作用

高灵敏度、高精密度、低检出限、多元素同时检测并可提供同位素组成比值信息的等离子体质谱与高空间分辨率的紫外激光采样技术结合 ,可定量地测定单个流体包裹体中常、微量元素含量 ,为成矿流体的研究提供了一个新的研究手段。文中简要地介绍了激光剥蚀电感耦合等离子体质谱 (LA ICP MS)分析仪器的发展 ,结合实验室的研究工作 ,就激光剥蚀池的设计、单个流体包裹体的剥蚀方法、元素的分馏效率、定量校正技术及其在成矿成因物理化学机制研究中的应用等进行评述 ,并阐述单个流体包裹体元素组成的LA ICP MS分析技术存在的局限和发展趋势。

NEW TECHNIQUES OF MAJOR AND MINOR ELEMENTAL ANALYSIS IN INDIVIDUAL FLUID INCLUSION--LASER ABLATION INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY (LA-ICP-MS)

A combination of the laser ablation technique and inductively coupled plasma mass spectrometry (LA ICP MS) has been used for the quantitative analysis of major and minor element in individual fluid inclusion. It has become a powerful tool in studies of fluid inclusion owing to its high sensitivity, low detection limits and a large dynamic line range. Combining with the studies in the authors' laboratory, the microanalysis technique of fluid inclusion is described in detail including the configuration of LA ICP MS, the designs of ablation cell, ablation technique of fluid inclusion, the elemental fractionation, quantitative calibration procedures and the application to the physical and chemical mechanism of ore precipitation. The strengths, limitations and future developments of LA ICP MS microanalysis techniques in fluid inclusion are discussed.