Application of raman imaging in UHPM research

Abstract

Crustal-derived rocks can be subducted to mantle depth and metamorphosed at ultra-high pressure conditions (>2.6 GPa and 600 ∘ C), which are defined by the presence of coesite. Findings of diamond in metamorphic rocks further extended the upper pressure limit for crustal rocks (>4.0 GPa and 900–1000 ∘ C). Almost all ultra-high pressure mineral-indicators occur as small relics and Raman spectroscopy is a very powerful tool for the identification of these relics. Despite the significant progress in Raman imaging, this technique remains underestimated in ultra-high pressure research. In this chapter several examples of Raman imaging applied in ultra-high pressure petrology are summarised and discussed.