Abstract
Experiments in the quartz-saturated part of the system KFMASH under fO 2 conditions of the haematite-magnetite buffer and using bulk compositions with X Mg of 0.81, 0.72, 0.53 define the stability limits of several mineral assemblages within the P-T field 9-12 kbar, 850-1100°C. The stability limits of the mineral assemblages orthopyroxene + spinel + cordierite±sapphirine, orthopyroxene + garnet + sapphirine, sapphirine + cordierite + orthopyroxene and garnet + orthopyroxene + spinel have been delineated on the basis of P-T and T-X pseudosections. Sapphirine did not appear in the bulk composition of X Mg =0.53. A partial petrogenetic grid applicable to high Mg-Al granulites metamorphosed at high fO 2 , developed in our earlier work, was extended to higher pressures. The experimental results were successfully applied to several high-grade terranes to estimate P-T conditions and retrograde P-T trajectories.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
