Posts by Spectral Evolution:

Identifying mica alteration with an oreXpress NIR field spectrometer

The alteration path from montmorillonite to muscovite can provide an indication of the proximity of an ore zone. In addition, it can also be hard to track, even for an experienced geologist. Mica alteration minerals including montmorillonite, phengite, sericite and muscovite can be identified using an oreXpress field spectrometer with optional EZ-ID mineral identification software.