1. Metamorphic fluids
Lecture 9

2. detail 1 (3.7 cm)

3. 4. Devolatilization Reactions
The temperature of a wollastonite isograd based on this reaction is obviously dependent upon pCO2
Figure T-XCO2 phase diagram for the reaction Cal + Qtz = Wo + CO2 at 0.5 GPa assuming ideal H2O-CO2 mixing, calculated using the program TWQ by Berman (1988, 1990, 1991). Winter (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall.
Figure A portion of the equilibrium boundary for the calcite-aragonite phase transformation in the CaCO3 system. After Johannes and Puhan (1971), Contrib. Mineral. Petrol., 31, Winter (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall.

4. Figure A portion of the Alta aureole in Little Cottonwood Canyon, SE of Salt Lake City, UT, where talc, tremolite, forsterite, and periclase isograds were mapped in metacarbonates by Moore and Kerrick (1976) Amer. J. Sci., 276, Winter (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall.

5. Metamorphism of Calcareous Rocks
Figure Metamorphic zones developed in regionally metamorphosed dolomitic rocks of the Lepontine Alps, along the Swiss-Italian border. After Trommsdorff (1966) Schweiz. Mineral. Petrogr. Mitt., 46, and (1972) Schweiz. Mineral. Petrogr. Mitt., 52, Winter (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall.

7. Chapter 30: Metamorphic Fluids & Metasomatism
1 cm b
1 cm
Figure a. Metasomatic zones separating quartz diorite (bottom) from marble (top). Zonation corresponds to third row from bottom in Table b. Symmetric metasomatic vein in dolomite. Zonation corresponds to last row in Table Adamello Alps. After Frisch and Helgeson (1984) Amer. J. Sci., 284, Photos courtesy of Hal Helgeson. Winter (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall.

8. Chapter 30: Metamorphic Fluids & Metasomatism
Figure Mineral zones and modes developed at the contact between quartz diorite and dolomitic marble in Figure 30-27a. Initial contact may be at either side of the contact zone. Index numbers at the top indicate the locations of bulk chemical analyses. After Frisch and Helgeson (1984) Amer. J. Sci., 284, Winter (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall.