Detecting Magma Mixing Processes Using Scanning Electron Microscopy Method(无全文)

作者:Nicola Mari 刊名:地球科学与工程:英文版 上传者:

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【摘要】This review work explains some of the most important techniques to detect the occurrence of magma mixing phenomena in the volcanic rocks by using SEM (scanning electron microscope). In particular, the most useful methods related to the different types of mixing are reviewed: complete mixing (blending) or incomplete mixing (mingling). For blending, backscattered electron images and EDS (energy dispersive spectroscopy) are the most accurate methods: an example taken from a sample of ash of the 2007 Stromboli volcano eruption was used. For mingling, the best method is given by X-ray elemental mapping (in particular of Ca and Si), as explained through the example taken from a sample of the 2003 explosive eruption of Soufriere Hills volcano. The aim of this work was to establish whereas would be useful to use backscattered eletron images, EDS, or X-ray elemental mapping techniques, according to the different types of mixing that occur very often in magmatic systems.

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