Deformation history reconstruction using single quartz grain Raman microspectroscopy data

摘要: One of the most common minerals in Earth's crust, quartz, is stable across a wide range temperature and pressure conditions. As its microstructure sensitive to diverse deformation mechanisms, quartz may provide valuable information regarding structural evolution many different rock types. Using Raman microspectroscopy, single grains monomineralic domains characterized by conditions can be identified separated. In this study, three microstructurally extreme grain types were discriminated from subsurface shear zone: with undulose extinction (T0), subgrains (T1), recrystallized (T2). Moreover, several transitional measured, which represent combinations aforementioned extremes. Statistical analysis revealed that microscopically possess significantly spectral attributes as such divided on basis certain variables their respective spectra. The formed mechanisms thus distinct T0-T1-T2 space therefore also considered virtual deformational space. Although each complex measured appears elsewhere process defined conditions, they together successive path. This combined pathway assumed characteristic for whole volume under study. Finally, computed spectroscopy-based enabled determination analyzed zone. Copyright © 2014 John Wiley & Sons, Ltd.