InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Optical properties studied in thin section of metamorphic rocks |
|
Answer» tion:In optical mineralogy and petrography, a thin section (or petrographic thin section) is a thin slice of a rock, mineral, soil, pottery, bones, or even METAL sample, prepared in a laboratory, 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 uses the Michel-Lévy interference colour chart to determine thickness, typically using quartz as the thickness gauge because it is one of the most abundant minerals. |
|