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《Journal of Chinese Electron Microscopy Society》 2013-06
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The significance of a back-scattered electron image(of EPMA) in micro-area analyses of carbonate rocks

QIN Yu-juan;ZHANG Tian-fu;HU Yuan-yuan;ZHU Yin;PetroChina Hangzhou Research Institute of Geology;Key laboratory of Carbonates Reservoirs,CNPC;  
Though the compositions of carbonate rock are simple,its structure is rather complicated,so micro probe analysis is very important for the investigation. However,the conventional apparatus,such as the optical microscope,has no further capability to improve the studying precision of the micro-area analyses of carbonate rocks. But the advanced apparatus like EPMA has the ability to enhance greatly both the research precision and profundity. It can magnify the object by thousands of times,and even one-hundred- thousand times. The images acquired can distinctly show microscale to nanoscale microtextures. At the same time,the elements can be analyzed correspondingly. By connecting the microtextures with chemical compositions of a sample,EPMA performs in situ and credible micro-area analyses accurately. In this paper,the author emphasizes a sort of foremost image in EPMA,namely a Back-Scattered Electron Image( BSEI),which plays a leading role in the micro-area analyses of carbonate rocks. Besides the significance in studying microtextures and positioning precisely for element analyzing,the significance in identifying minerals is also crucial.
【CateGory Index】: P575
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