出典:Wiktionary
出典:『Wiktionary』 (2017/03/29 14:09 UTC 版)
thin section (複数形 thin sections)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/10 12:59 UTC 版)
In optical mineralogy and petrography, a thin section is a laboratory preparation of a rock, mineral, soil, pottery, bones, even metal sample for use with a polarizing petrographic microscope, electron microscope and electron microprobe. A thin sliver of rock is cut from the sample with a diamond saw and ground optically flat. It is then mounted on a glass slide and then ground smooth using progressively finer abrasive grit until the sample is only 30 μm thick. The method involved using the Michel-Lévy interference colour chart. Typically quartz is used as the gauge to determine thickness as it is one of the most abundant minerals.