<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Carnian metapelites from the southeastern segment of the Mürzalpen Nappe (Northern Calcareous Alps, Eastern Alps) were heated to 280-310 °C, estimated by Raman spectroscopy of carbonaceous material (RSCM). This temperature range is correlated to a Color Alteration Index of 5.0-6.5, determined on conodonts from adjacent Anisian to Norian carbonates. Average RSCM temperatures estimated on the conodonts are biased towards higher temperatures. The spectral characteristics of the conodont apatite suggest a composition altered during progressive recrystallization, influencing the band parameters of the included carbonaceous matter. Consequently, accurate conodont RSCM thermometry needs an assessment of apatite alteration.</p></abstract>

Carnian metapelites from the southeastern segment of the Mürzalpen Nappe (Northern Calcareous Alps, Eastern Alps) were heated to 280-310 °C, estimated by Raman spectroscopy of carbonaceous material (RSCM). This temperature range is correlated to a Color Alteration Index of 5.0-6.5, determined on conodonts from adjacent Anisian to Norian carbonates. Average RSCM temperatures estimated on the conodonts are biased towards higher temperatures. The spectral characteristics of the conodont apatite suggest a composition altered during progressive recrystallization, influencing the band parameters of the included carbonaceous matter. Consequently, accurate conodont RSCM thermometry needs an assessment of apatite alteration.

Conodont thermometry by Raman spectroscopy on carbonaceous material: a case study from the Northern Calcareous Alps (Mürzalpen Nappe, Eastern Alps)

Department für angewandte Geowissenschaften und Geophysik, Montanuniversität Leoben

Austrian Journal of Earth Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Carnian metapelites from the southeastern segment of the Mürzalpen Nappe (Northern Calcareous Alps, Eastern Alps) were heated to 280-310 °C, estimated by Raman...

Conodont thermometry by Raman spectroscopy on carbonaceous material: a case study from the Northern Calcareous Alps (Mürzalpen Nappe, Eastern Alps)

Published Online: Oct 31, 2020

Page range: 201 - 210

Received: Jul 20, 2020

Accepted: Sep 30, 2020

DOI: https://doi.org/10.17738/ajes.2020.0012

Keywords
Northern Calcareous Alps, Greywacke Zone, Aflenz, Raman Spectroscopy, Conodont Color Alteration Index, Thermometry

© 2020 Gerd Rantitsch et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Conodont thermometry by Raman spectroscopy on carbonaceous material: a case study from the Northern Calcareous Alps (Mürzalpen Nappe, Eastern Alps)

Published Online: Oct 31, 2020

Page range: 201 - 210

Received: Jul 20, 2020

Accepted: Sep 30, 2020

DOI: https://doi.org/10.17738/ajes.2020.0012

KeywordsNorthern Calcareous Alps, Greywacke Zone, Aflenz, Raman Spectroscopy, Conodont Color Alteration Index, Thermometry

© 2020 Gerd Rantitsch et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Northern Calcareous Alps, Greywacke Zone, Aflenz, Raman Spectroscopy, Conodont Color Alteration Index, Thermometry