Williams, M'L', Cleveland, M', Condit C'D

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Building a dynamic image-based
database Integrating thin section images and
data using Dynamic Digital Maps .
Williams, M.L., Cleveland, M., Condit
C.D University of Massachusetts-Amherst
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CD-ROM Synthesis, 2002
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East Lake Athabasca - Anhydrous felsic granulite
Qtz
Grt
Kfs Pl
Sil
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East Lake Athabasca - Anhydrous felsic granulite
Qtz
Grt
Kfs Pl
Sil
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Legs Lake shear zone - Hydrated felsic
granulites
Qtz
Pl
Sil
Bt
Qtz
Grt
3 mm
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Hydrated felsic granulites
Retrograde assemblage Grt Bt Crd Sil Pl
Qtz 0.4-0.5 GPa, 550-600 C
Bt
Crd
Grt
0.5 mm
Sil
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Thermobarometry
from Williams et al., 1995
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P-T pseudosection for hydrated felsic granulite
1.0
0.8
GPa
0.6
0.4
0.2
500
600
800
1000C
700
900
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Felsic granulites - P-MH2O pseudosection
1.0
0.8
Pressure GPa
0.6
0.4
0.2
0.0
0.2
0.6
1.0 (1.5 wt H2O)
0.8
MH2O
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Mapping-based approach - Full thin section X-ray
maps
Monazite distribution in retrograde felsic
granulite
Mg Ka
Monazite
Bt
Grt
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Felsic granulites - Monazite dating results
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Felsic granulite evolution
Xnt
1800-1830 MA
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East Athabasca, Canada P-T-t-D paths
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Upper Granite Gorge, Grand Canyon
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Upper Granite Gorge, Grand Canyon
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Upper Granite Gorge, Grand Canyon
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Upper Granite Gorge, Grand Canyon