Presentation is loading. Please wait.

Presentation is loading. Please wait.

P-T-t Paths and Their Significance. Metamorphic Field Gradient –Trend of Thermal Maxima Across Metamorphic Facies.

Similar presentations


Presentation on theme: "P-T-t Paths and Their Significance. Metamorphic Field Gradient –Trend of Thermal Maxima Across Metamorphic Facies."— Presentation transcript:

1 P-T-t Paths and Their Significance

2 Metamorphic Field Gradient –Trend of Thermal Maxima Across Metamorphic Facies

3 Clockwise P-T-t Path

4 P-T-t Path Reflecting Crustal Thickening

5 A Crustal Thickening P-T-t Path Central Indian Tectonic Zone (Proterozoic)

6 Early Barrovian P-T-t Path showing effects of later arc-related magmatism and variable uplift/erosion P-T-t Path for Connemara Inlier

7 P-T-t Path of Burial Metamorphism Field gradient 25 o C/Km

8 Subduction and exhumation in 10 Ma. Prograde, retrograde stages of a single metamorphic cycle (1, 2) Gt-hbl thermometry Gt-amph-plag-qtz barometry (3) Jd-Ky isograd (eclogite facies) (4) Plag-Cor isograd (granulite facies) 5) Gt-Hbl thermometry, gt-amph-plag-qtz barometry SHRIMP U-Pb dating of zircon Alpine orogeny, Rhodope Region, Greece Liati and Gebauer, o C/Km 30 o C/Km

9 Clockwise P-T-t Path in a Back-Arc Basin ODP Site 976 between Spain and Morocco – Miocene extensional basin Exhumation in 6 4km/Ma

10 Alpine Uplift Rates from Geothermobarometry and 40 Ar- 39 Ar Dating mm/an 20 Ma 18 Ma 13.3 Ma 7.1 Ma Uplift Rate

11 Counter Clockwise P-T-t Paths

12 Counter-clockwise Path –Commonly Occurs Under Granulite Facies Conditions

13 Counter clockwise P-T-t Path – Archean Granulite Terrane

14 Proterozoic Metamorphism N. Australia HP LP

15 Counter-clockwise Paths in HP and LP Granulite Terranes

16 Clockwise P-T-t Path for Granulite Facies, Scotland

17 Variscan Clockwise and Counter-clockwise Paths in the Odenwald, Germany


Download ppt "P-T-t Paths and Their Significance. Metamorphic Field Gradient –Trend of Thermal Maxima Across Metamorphic Facies."

Similar presentations


Ads by Google