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

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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.

Original languageEnglish
Pages (from-to)201-210
Number of pages10
JournalAustrian journal of earth sciences
Issue number2
Publication statusE-pub ahead of print - 31 Oct 2020

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Publisher Copyright: © 2020 Gerd RANTITSCH, Gerhard BRYDA, Hans-Jürgen GAWLICK, published by Sciendo.

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