Hyper-spectral Raman imaging with multivariate curve resolution is employed to determine the underlying chemical composition of three interesting samples. A high pressure polymorph of TiO2 is determined to be a geomarker of large pre-Cambrian asteroid impacts. These large asteroids stuck the Earth with greater than 10 GPa pressure causing the impacted rocks to vaporize and reform as high-pressure polymorphs. The geology of Mars is still not well known; Raman spectrometers will be deployed on the Mars2020 mission to better investigate the near-surface minerology. Martian meteorites provide a random sampling of the minerology and a test sample for the efficacy of Raman spectroscopy on future rovers. Raman imaging is applied to the analyses of two Martian meteorites, a chondrite meteorite, and a synthetic surface sample to differentiate between biotic carbonates and abiotic minerals.

Raman hyper-spectral imaging and multivariate curve resolution applied to speciation in meteorites and meteorite impacts

256th National Meeting (2018)

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