Clinopyroxene tutorial Optical mineralogy скачать в хорошем качестве

Clinopyroxene tutorial Optical mineralogy

Several videos of clinopyroxenes in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation. Key characteristics: High relief, kind of crappy cleavage c. 90°-90°, faint green pleochroism, low to moderate interference colors, inclined extinction 00:00​ End section showing two cleavages 00:31​ Elongate prism, slight pleochroism, inclined extinction 01:01 Different orientations showing different interference colors 01:32​ Different orientations showing slight pleochroism 02:02​ Higher relief than adjacent hornblende (and quartz) 02:33 Higher relief than adjacent actinolite (and quartz) 03:03 Omphacite (high-pressure sodic pyroxene) in an eclogite 03:34 Omphacite with exsolution 04:04 High-temperature pyroxene with oxide exsolution