地质学、岩石学和采矿

EBSD技术在地质科学所有领域和采矿业中,都广泛应用。尽管它主要用于研究岩石变形(为了研究地质构造学和构造学),但现在EBSD越来越多地用于变质岩和火成岩岩石学,以及含矿岩石的表征。同时,EBSD还可用于研究陨石。有大量的EBSD应用,来表征一系列不同陨石样品的复杂结构,以帮助研究人员能够确定这些陨石形成过程中的条件和状态。EBSD在此领域的典型应用包括

  • 确定构造岩中的变形机制
  • 通过识别关键变质矿物,来重构压力—温度路径
  • 通过详细的晶粒粒度分析,重构古构造应力
石英糜棱岩的晶粒相对取向偏差图(GROD),突出显示大晶粒和变形晶粒
石英糜棱岩的晶粒相对取向偏差图(GROD),突出显示大的、未再结晶晶粒内,强烈的晶内变形

Application Notes

Determining the metamorphic history of rocks using combined EBSD and EDS

Reconstructing the metamorphic evolution of rocks often depends on the identification of key minerals that are only stable at specific temperatures and pressures. Combined EBSD and EDS analyses enable more rigorous phase identification than conventional techniques, with the added benefit of providing insights into a rock’s deformation and chemical history.

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Characterising Complex Rock Samples

An eclogite sample containing 10 phases has been rapidly analysed using integrated EBSD and EDS. The performance of Symmetry enables high pattern resolution and good indexing, even at 250 pps.

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Fast Characterisation of Deformed Quartz Rocks

A relatively simple geological sample, a quartz mylonite, is here characterised in a matter of minutes using Symmetry, collecting data at almost 1000 pps.

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Webinars

High-speed characterisation of ore samples

This webinar will highlight examples of fast, integrated EBSD and EDS analysis from a range of ore-bearing samples including chromite-bearing pyroxenites from the Bushveld igneous complex in South Africa, the world's largest reserve of platinum group metals and gold placer deposits from Scotland. 

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