Metamorphism of CalcareousUltramafic Rocks Metamorphism of CalcareousUltramafic Rocks

Metamorphism of Calcareous/Ultramafic Rocks

Metamorphism of Calcareous/Ultramafic Rocks – the System Ca. O-Mg. O-Si. O 2 -CO 2 -H 2 O Calcareous Rocks Ultramafic Rocks

Metamorphic zones in siliceous dolomites of the Lepontine Alps

Mineral Assemblages in Siliceous Dolomites All reactions isobarically univariant!

The Effect of H 2 O on Decarbonation Reactions – T-XCO 2 Diagrams

Mixed-Volatile (H 2 O-CO 2)Equilibria 3 XCO 2 at TMax n. CO 2/(n. CO 2+n. H 2 O)

T-XCO 2 Phase Equilibria in the System Ca. O-Mg. O-Si. O 2 -CO 2 -H 2 O

Chemical Potential and T-XCO 2 Diagrams m H 2 O Yields correct orientation of topology m. CO 2

Internal Buffering of Fluid Composition (XCO 2)

Internal Versus External Buffering of XCO 2 External Buffering Internal buffering

The Assemblage Dol-Qtz and the Talc Field Note that the assemblage dol-qtz will produce, talc, tremolite or diopside depending on XCO 2

Intersecting Isograds – the Role of XCO 2

Intersecting Isograds – the Role of XCO 2

Effect of XCO 2 on Isograd Distribution in Mixed Pelitic and Calcareous Assemblages

CO 2 Infiltration and the Amphibolite – Granulite Transition

Isograds in Limestone around Mount Royal Note the implications of internal buffering of XCO 2

Metamorphism of Ultramafic Rocks

Progressive Metamorphism of Ultramafic Rocks

T-XCO 2 Relationships for Metamorphosed Ultramafic Rocks

P-T relationships During Progressive Metamorphism of Ultramafic Rocks

Ultramafic Rocks, CO 2 Sequestration and Global Cooling

A CO 2 Sequestration Model • Create a hydrous slurry of ultramafic rock • Pump CO 2 through the slurry at elevated temperature

Results of a CO 2 sequestration Experiment Temperature: 195 o. C Duration: 5 hrs 25 min Serpentinite Magnesite 30 mm

A Potential Thermoelectric Power Station of the Future