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Swiss Journal of Geosciences
Fig. 13 | Swiss Journal of Geosciences

Fig. 13

From: The Arosa zone in Eastern Switzerland: oceanic, sedimentary burial, accretional and orogenic very low- to low grade patterns in a tectono-metamorphic mélange

Fig. 13

The Haupterhorn WSW and Parsenn section (Totalp) modified after Lüdin (1987). The high Kübler-Index (∆°2θ) and vitrinite reflectance (Rmax%) gradient is related with a hydrothermal epidote-amphibole hornfels facies in the red clay, the ophicalcite and the greenstone. The younger Radiolarite is not included. Thus the hornfels can be related with an oceanic metamorphism. The gradient in the Haupterhorn WSW section is probably a remnant of the thermal history during rifting found in the sediments of the South Penninic ocean floor cover

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