Application of Cathodoluminescence Imaging to the Study of by Sam Boggs Jr, David Krinsley PDF

Application of Cathodoluminescence Imaging to the Study of by Sam Boggs Jr, David Krinsley PDF

By Sam Boggs Jr, David Krinsley

Minerals in sedimentary rocks emit attribute obvious luminescence known as cathodoluminescence (CL) whilst bombarded through excessive power electrons. CL emissions will be displayed as color photos in a cathodoluminescence microscope or as high-resolution monochromatic photos in a scanning electron microscope. this gives details now not to be had by way of different recommendations at the provenance of the mineral grains in sedimentary rocks, and insights into diagenetic alterations. The booklet, first released in 2006, starts with an simply understood presentation of the basic rules of CL imaging. this can be via an outline and dialogue of the tools utilized in CL imaging, and an in depth account of its purposes to the research of sedimentary rocks. the amount is a accomplished, simply understood description of the purposes of cathodoluminescence imaging to the research of sedimentary rocks. it will likely be a big source for tutorial researchers, execs and complex graduate scholars in sedimentary geology.

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12. Schematic diagram of the time-of-flight SIMS system used at the University of Mu¨nster, Germany. (From Arlinghaus, H. , 2002. Ion detection. In Bubert, H. and H. , Surface and Thin Film Analysis, Weinhein, Wiley-VCH, Fig. 4, p. 91. ) 40 Instrumentation and techniques mass numbers. The SIMS spectra provide evidence of all the elements present, as well as insight into molecular composition. Peak heights cannot be taken to be directly proportional to concentrations in the sample. It is necessary to use well-characterized standards to quantify trace elements.

For some purposes, rock chips, such as cuttings from well bores, and loose grains can be glued to a slide or plug and examined in the SEM without being ground to standard thin-section thickness. An alternative technique is to grind a flat surface on the mounted grains, glue this flat surface to another slide, then grind away the first glass slide to produce a ‘‘thin section’’ of the grain mount. See Trewin (1988) for details of these preparation methods. Many common minerals are nonconductive; therefore, it is necessary to coat specimens with a thin conductive coating (1–10 nm thick) to prevent charging under electron bombardment (excess beam current must flow from specimen to ground to avoid accumulation of charge).

1970) described the use of the SEM in cathodoluminescence observations on natural samples, and Krinsley and Hyde (1971) reported the use of SEM– CL to study fractures in quartz (sand) grains. Today, SEM–CL is widely used today for a variety of geological applications. 2 illustrates schematically the principal features of a modern SEM. The major components are the electron column and the control console (see photograph on page 5). , 2003, p. 21). A vacuum pump at the base of the column can create a vacuum of approximately one-billionth atmospheric pressure.

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