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Williams, M.L., Cleveland, M., Condit C.D University of Massachusetts-Amherst Building a dynamic image-based database: Integrating thin section images.

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Presentation on theme: "Williams, M.L., Cleveland, M., Condit C.D University of Massachusetts-Amherst Building a dynamic image-based database: Integrating thin section images."— Presentation transcript:

1 Williams, M.L., Cleveland, M., Condit C.D University of Massachusetts-Amherst Building a dynamic image-based database: Integrating thin section images and data using Dynamic Digital Maps.

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3 CD-ROM Synthesis, 2002

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5 East Lake Athabasca - Anhydrous felsic granulite Grt Kfs + Pl Qtz Sil

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7 East Lake Athabasca - Anhydrous felsic granulite Grt Kfs + Pl Qtz Sil

8 Grt Qtz Sil Bt Pl Qtz 3 mm Legs Lake shear zone - Hydrated felsic granulites

9 Grt Crd Bt 0.5 mm Sil Hydrated felsic granulites Retrograde assemblage: Grt +Bt + Crd + Sil + Pl + Qtz 0.4-0.5 GPa, 550-600 °C

10 Thermobarometry from Williams et al., 1995

11 1.0 0.8 0.6 0.4 0.2 GPa 5006008001000°C700900 P-T pseudosection for hydrated felsic granulite

12 1.0 0.8 0.6 0.4 0.2 Pressure [GPa] Felsic granulites - P-MH2O pseudosection 0.00.20.61.0 (1.5 wt% H 2 O) 0.8 M H2O

13 Monazite distribution in retrograde felsic granulite Mapping-based approach - Full thin section X-ray maps Grt Bt Monazite Mg K 

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16 Felsic granulites - Monazite dating results

17 Felsic granulite evolution Xnt: 1800-1830 MA

18 East Athabasca, Canada P-T-t-D paths 0.8 0.6 0.4 0.2 GPa 4006008001000°C 1.2 1.0

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20 Upper Granite Gorge, Grand Canyon

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