Below is a metamorphic field gradient, what is the likely plate tectonic setting? Explain your answer. sample P-T limits (this study) zone P-T limits (Huang, 2003a) sample P-T path metamorphic field gradient 184.2 ± 1.5 Ma W120 (KY) 179.4 ± 1.6 Ma W110 (Sil) W126 (Ky-Sil)

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Below is a metamorphic field gradient, what is the likely plate tectonic setting? Explain your answer.
Pressure (kbar)
7
5
(a)
Bt-zone
(from
410 °C)
3
500
sample P-T limits (this study)
zone P-T limits (Huang, 2003a)
sample P-T path
metamorphic field gradient
100 °C/kb 27 °C/km
184.2 ± 1.5 Ma
W120 (KY)
550
W122 (St)
191.5±2.4 Ma
150 °C/kb = 40 °C/km
179.4 ± 1.6 Ma
W110 (Sil)
W126 (Ky-Sil)
600
Temperature (°C)
650
Melt zone
(to 725 °C)
700
Transcribed Image Text:Below is a metamorphic field gradient, what is the likely plate tectonic setting? Explain your answer. Pressure (kbar) 7 5 (a) Bt-zone (from 410 °C) 3 500 sample P-T limits (this study) zone P-T limits (Huang, 2003a) sample P-T path metamorphic field gradient 100 °C/kb 27 °C/km 184.2 ± 1.5 Ma W120 (KY) 550 W122 (St) 191.5±2.4 Ma 150 °C/kb = 40 °C/km 179.4 ± 1.6 Ma W110 (Sil) W126 (Ky-Sil) 600 Temperature (°C) 650 Melt zone (to 725 °C) 700
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