A review of analytical techniques for melt inclusion study
Melt inclusions contain small amounts of silicate melts being captured during the crystallization of host min-erals in magmatic rocks.Melt inclusions record unique information of the deep processes in the Earth.Therefore,it is very important to effectively to study the petrography of melt inclusions and unravel the encoded geological information.Based on previous studies of melt inclusions,this paper presents an overview of the analytical tech-nqiues for melt inclsuions study,and recommends five steps to carry out melt inclusion study,including①Using a polarizing microscope to conduct detailed petrographic observations for identifying the types of melt inclusions;②Preparing samples for heating experiments and component analysis;③Loading the samples on a high temper-ature heat table to conduct heating experiments on melt inclusions to homogenize their compositions and record the temperature corresponding to phase changes;④Analysing the major and trace elements,isotopes,and volatile compositions of melt inclusions using Electron Probe Microanalysis,Secondary Ion Mass spectrum,LA-ICP-MS,and Microscopical Raman spectrum techniques;⑤comparing the compositon of melt inclusions with the composi-tion of whole rocks and fluid inclusions to understand the magma evolution.Although studies on melt inclusions date back to nearly a century ago,acquisioon of accurate geological information encapsulted in the melt inclsuions re-mains to be a challenage due to a lack of effective analytical technqiues and the complexity of melt inclusions in na-ture.The development of Earth System Science initiates an inquiry into a better undersanding of deep process of the earth,and melt inclusions in magmatic rocks can provide an essential tool for probing into the deep earth process.
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