Calibration of carbonaceous material Raman geothermometry and zircon (U-Th)/He thermochronometry for diagenetic to very low-grade metamorphic conditions
Final Report Abstract
During this study the most important biasing factors (spectral evaluation, sample heterogeneity, instrumental bias) in RSCM-geothermometry after Beyssac et al. (2002) were identified and partly quantified. The findings were then used to further investigate methodical aspects of Raman spectroscopy on dispersed vitrinites. Lünsdorf could show that the Raman spectra of vitrinites from deep diagenetic to subgreenschist facies conditions are unaffected by polishing and best analyzed with near UV lasers. Lünsdorf and Lünsdorf (2016) developed an automated curve-fitting software to eliminate the spectral evaluation bias. This software and results of the former studies were then combined to formulate a methodical protocol for the revised RSCM-geothermometer, which is based on a publicly available reference sample set.
Publications
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(2014) Towards a Higher Comparability of Geothermometric Data obtained by Raman Spectroscopy of Carbonaceous Material. Part I: Evaluation of Biasing Factors. Geostandards and Geoanalytical Research, 38, 73-94
Lünsdorf, Nils K.; Dunkl, Istvan; Schmidt, Burkhard C.; Rantitsch, Gerd & von Eynatten, Hilmar
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(2014) Assessing the quality of metallurgical coke by Raman spectroscopy. International Journal of Coal Geology, 130, 1-7
Rantitsch, Gerd; Bhattacharyya, Anrin; Schenk, Johannes & Lünsdorf, Nils Keno
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(2016) Evaluating Raman spectra of carbonaceous matter by automated, iterative curve-fitting. International Journal of Coal Geology, 160-161, 51-62
Lünsdorf, N.K. & Lünsdorf, J.O.
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(2016) Hydrocarbon generation and migration under a large overthrust: The carbonate platform under the Semail Ophiolite, Jebel Akhdar, Oman. International Journal of Coal Geology, 168 (1), p. 3-19
Grobe, A.; Urai, J.L.; Littke, R. & Lünsdorf, N.K.
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(2016) Post-Caledonian brittle deformation in the Bergen area, West Norway: results from K- Ar illite fault gouge dating. Norwegian Journal of Geology, 96 (3), 275-299
Ksienzyk, Anna K.; Wemmer, Klaus; Jacobs, Joachim; Fossen, Haakon; Schomberg, Anna C.; Süssenberger, Annette; Lünsdorf, N. Keno & Bastesen, Eivind
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(2016) Raman spectroscopy of dispersed vitrinite — Methodical aspects and correlation with reflectance. International Journal of Coal Geology, 153, 75-86
Lünsdorf, Nils Keno
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(2016) Testing the preservation of biomarkers during experimental maturation of an immature kerogen. International Journal of Astrobiology, 15 (3), 165-175
Mißbach, H.; Duda, J.-P.; Lünsdorf, N.K.; Schmidt, B.C. & Thiel, V.
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(2017) Towards a higher comparability of geothermometric data obtained by Raman spectroscopy of carbonaceous material, Part II: A revised geothermometer. Geostandards and Geoanalytical Research
Lünsdorf, N. Keno; Dunkl, István; Schmidt, Burkhard C.; Rantitsch, Gerd & von Eynatten, Hilmar
