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

IF 1.7 4区地球科学 Q2 Earth and Planetary Sciences

Austrian Journal of Earth Sciences Pub Date : 2020-06-01 DOI:10.17738/ajes.2020.0012

G. Rantitsch, Gerhard Bryda, H. Gawlick

引用次数: 4

Abstract

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.

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碳质材料的拉曼光谱牙形刺测温法：以北钙质阿尔卑斯山（Mürzalpen Nappe，东阿尔卑斯山）为例

摘要通过碳质材料的拉曼光谱（RSCM）估计，来自Mürzalpen Nappe东南段（北钙质阿尔卑斯山、东阿尔卑斯山）的卡尼期变质精英被加热到280-310°C。该温度范围与5.0-6.5的变色指数相关，该指数是在相邻的阿尼斯阶至诺里阶碳酸盐岩的牙形石上测定的。牙形石上估计的RSCM平均温度偏向于更高的温度。牙形石磷灰石的光谱特征表明，成分在渐进再结晶过程中发生了变化，影响了所含碳质的能带参数。因此，准确的牙形石RSCM测温需要对磷灰石蚀变进行评估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Austrian Journal of Earth Sciences Earth and Planetary Sciences-Paleontology

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： AUSTRIAN JOURNAL OF EARTH SCIENCES is the official journal of the Austrian Geological, Mineralogical and Palaeontological Societies, hosted by a country that is famous for its spectacular mountains that are the birthplace for many geological and mineralogical concepts in modern Earth science. AUSTRIAN JOURNAL OF EARTH SCIENCE focuses on all aspects relevant to the geosciences of the Alps, Bohemian Massif and surrounding areas. Contributions on other regions are welcome if they embed their findings into a conceptual framework that relates the contribution to Alpine-type orogens and Alpine regions in general, and are thus relevant to an international audience. Contributions are subject to peer review and editorial control according to SCI guidelines to ensure that the required standard of scientific excellence is maintained.