Fluid inclusions in granulite-facies metapelites of the Hercynian ancient lower crust of the Serre, Calabria, Southern Italy

摘要: Investigations of fluid inclusions in granulitefacies metapelites southern Calabria enable characterization the composition these lower crustal rocks, and constrain petrologically deduced retrograde P-T path characterized by isothermal uplift prior to isobaric cooling middle levels. Fluid cordierite, garnet sillimanite have a CO2-rich composition. Inclusions cordierite rarely contain minor amounts N2 H2O, garnets some CO2−CH4−N2 been analyzed Raman microprobe. Quartz reveals most complex melusion compositions (1) CO2-rich, (2) CO2−CH4−N2, (3) CH4−N2, (4) H2O−MgCl2−CaCl2−NaCl, (5) H2O−NaCl (6) H2O−CO2. The earliest after peak metamorphism are rich CO2 with H2O. An early CO2−(H2O−N2) has confirmed detection CO2, H2O channels structure. Most were modified during from level, resulting density decrease still dominant. subsequent led further modifications inclusions. High-density around implosion textures or scattered amongst lower-density ones must formed this episode. Aqueous quartz mostly late consistent trapping rehydration.