1. Metamorphism of Calcareous/Ultramafic Rocks

2. Metamorphism of Calcareous/Ultramafic Rocks – the System CaO-MgO-SiO2-CO2-H2O

3. Metamorphic zones in siliceous dolomites of the Lepontine Alps

4. Mineral Assemblages in Siliceous Dolomites
All reactions isobarically univariant!

5. The Effect of H2O on Decarbonation Reactions – T-XCO2 Diagrams

6. XCO2 at TMax nCO2/(nCO2+nH2O)
Mixed-Volatile (H2O-CO2)Equilibria
XCO2 at TMax nCO2/(nCO2+nH2O) 3

7. T-XCO2 Phase Equilibria in the System CaO-MgO-SiO2-CO2-H2O

8. Chemical Potential and T-XCO2 Diagrams
mH2O
Yields correct orientation of topology
mCO2

9. Internal Buffering of Fluid Composition (XCO2)

10. Internal Versus External Buffering of XCO2
Internal buffering

11. The Assemblage Dol-Qtz and the Talc Field
Note that the assemblage dol-qtz will produce, talc, tremolite or diopside depending on XCO2

12. Intersecting Isograds – the Role of XCO2

13. Intersecting Isograds – the Role of XCO2

14. Effect of XCO2 on Isograd Distribution in Mixed Pelitic and Calcareous Assemblages

15. CO2 Infiltration and the Amphibolite – Granulite Transition

16. Isograds in Limestone around Mount Royal
Note the implications of internal buffering of XCO2

17. Metamorphism of Ultramafic Rocks

18. Progressive Metamorphism of Ultramafic Rocks

19. T-XCO2 Relationships for Metamorphosed Ultramafic Rocks

20. P-T relationships During Progressive Metamorphism of Ultramafic Rocks

21. Ultramafic Rocks, CO2 Sequestration and Global Cooling

22. A CO2 Sequestration Model
Create a hydrous slurry of ultramafic rock
Pump CO2 through the slurry at elevated temperature

23. Results of a CO2 sequestration Experiment
Temperature: 195 oC
Duration: 5 hrs 25 min
Serpentinite
Magnesite
30 mm

24. A Potential Thermoelectric Power Station of the Future