Statistical analysis of Raman spectra. The black and red solid circles correspond to DB1 and DB2, respectively, while the dashed lines indicate overall trends. (a) Scatter plot showing variations toward lower wavenumbers in Raman peak positions across different shock pressures. (b) Scatter plot illustrating changes in Raman full width at half maximum (FWHM) under different shock pressures, showing that the FWHM of DB1 gradually increases, while the FWHM of DB2 first decreases and then increases. (c) Scatter plot depicting the difference in Raman peak positions, along with the cumulative frequency distribution of FWHM across different shock pressures. The peak separation (ω) of the shocked olivine samples showed an overall increasing trend, while the cumulative ΣFWHM exhibited a trend of first decreasing and then increasing. (d) Scatter plot displaying a trend of first decreasing and then increasing variations in Raman peak areas as a function of shock pressures.