方案摘要
方案下载| 应用领域 | 地矿 |
| 检测样本 | 非金属矿产 |
| 检测项目 | 痕量元素 |
| 参考标准 | - |
The determination of different mineral phases through backscattered electron (BSE) detectors is a common task in mineralogy. This approach however has limitations. If minerals with different composition but similar average atomic number are viewed with a BSE detector there is very little if no material contrast to be observed. This shortfall can be overcome through use of X-ray elemental maps. The innovative XFlash® 4010 SDD allows extremely high input and output count rates, hence elemental maps can be performed in about one tenth of the time required by conventional Si(Li) detectors.
Results show that EDS maps have an advantage over BSE
images: latter fail to distinguish some mineral phases due
to their similar average atomic number contrast. The maps
permit to discriminate the minerals quartz [SiO2], dolomite
[(Ca,Mg)CO3] and sodium feldspar [NaAlSi3O8] as well as
calcite [CaCO3] and potassium feldspar [KAlSi3O8] – and so
display a wealth of data that electron images simply cannot
provide.
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