Refinement of geothermobarometry for cordierite granulites

  • S Bhattacharya


Refined geothermobarometers are presented for cordierite granulites. The refinement was achieved by using internally consistent thermodynamic datasets.

Improved calibrations have been demonstrated for a number of granulite areas. Also, the usefulness of the improved geobarometer in identifying decompression paths has been discussed.


Cordierite-granulite internally consistent thermodynamic dataset hydration decompression 


  1. Ashworth J R and Chinner G A 1978 Coexisting garnet and cordierite in migmatites from the Scottish Caledonides;Contrib. Mineral. Petrol. 65 379–394CrossRefGoogle Scholar
  2. Berg J R 1977 Regional geobarometry in the contact aureoles of the anorthositie Nain complex, Labrador;J. Petrol. 18 399–430Google Scholar
  3. Berman R G 1988 Internally consistent thermodynamic data for minerals in the system Na2O-K2O-CaO-MgO-FeO-Fe2O3-Al2O3-SiO2-TiO2-H2O-CO2;J. Petrol. 29 443–522Google Scholar
  4. Bhattacharya A and Sen S K 1985 Energetics of hydration of cordierite and water barometry in cordieritegranulites;Contrib. Mineral. Petrol. 89 370–378CrossRefGoogle Scholar
  5. Bhattacharya A, Mazumder A C and Sen S K 1988 Fe-Mg mixing in cordierite: Constraints from natural data and implications for cordierite-garnet geothermometry in granulites;Am. Mineral. 73 338–344Google Scholar
  6. Clifford T N, Stumpfi E F, Burger A J, McCarthy T S and Rex D C 1981 Geochemical-chemical and isotopic studies of Namaqualand granulites, South African Grenvile analogue;Contrib. Mineral. Petrol. 77 225–250CrossRefGoogle Scholar
  7. Ganguly J and Saxena S K 1984 Mixing properties of aluminous silicate garnets: Constraints from natural and experimental data, and applications to geothermobarometry;Am. Mineral. 69 88–97Google Scholar
  8. Harris N B W and Jayram S 1982 Metamorphism of cordierite gneiss from the Bangalore region of South Indian Archaean;Lithos. 15 89–98CrossRefGoogle Scholar
  9. Harris N B W, Holt R W and Drury S A 1982 Geothermometry, geobarometry and late Archaean geotherms from the granulite facies terrain of South India;J. Geol. 90 509–527CrossRefGoogle Scholar
  10. Holdaway M J 1976 Mutual compatibility relations of the Fe-Mg-Al silicates at 800C and 3 Kbar;Am. J. Sci. 276 285–308Google Scholar
  11. Holdaway M J and Lee S M 1977 Fe-Mg cordierite stability in high grade pelitic rocks based on experimental, theoretical and natural observations;Contrib. Mineral. Petrol. 63 175–198CrossRefGoogle Scholar
  12. Holland T J B and Powell R 1990 Enlarged and updated thermodynamic data set;Metamor. Geol. 8 89–124CrossRefGoogle Scholar
  13. Johannes W and Schreyer W 1981 Experimental introduction of CO2 and H2O into Mg-cordierite;Am. J. Sci. 281 299–317Google Scholar
  14. Mirwald P W and Schreyer W 1977 Die stabile und metastabile Abbaureaktion von Mg-cordierit; In: Talk, Disthen und Quarz und ihre Abhangigkeit vom Gleichgewichts—Wassergehalt des cordierits;Fortsch. Mineral. 55 95–97Google Scholar
  15. Newton R C 1972 An experimental determination of high pressure stability limit of magnesian cordierite under wet and dry conditions;J. Geol. 80 398–420Google Scholar
  16. Newton R C 1983 Geobarometry of high grade metamorphic rocks;Am. J. Sci. A283 1–28Google Scholar
  17. Newton R C 1989 Thermodynamic analysis of phase equilibria in simple mineral systems; In: Reviews in Mineralogy;Min. Soc. Am. 17 1–33Google Scholar
  18. Speer J A 1982 Metamorphism of pelitic rocks of the Snyder group in the contact aureoles of the Kiglapait layered intrusion, Labrador: Effects of buffering partial pressures of water;Can. J. Earth. Sci. 19 1889–1909Google Scholar
  19. Thompson A B 1976 Mineral reactions in pelitic rocks II. Calculations of some P-T-X(Fe-Mg) phase relations;Am. J. Sci. 276 425–444Google Scholar

Copyright information

© Indian Academy of Sciences 1993

Authors and Affiliations

  • S Bhattacharya
    • 1
  1. 1.Indian Statistical InstituteCalcuttaIndia

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