Raman spectra of reduced carbonaceous matter as a tool for determining the provenance of marbles: examples of ‘graphitic’ marbles from Czech quarries
Aneta Šťastná, Jan Jehlička, Richard Přikryl, 2010. "Raman spectra of reduced carbonaceous matter as a tool for determining the provenance of marbles: examples of ‘graphitic’ marbles from Czech quarries", Natural Stone Resources for Historical Monuments, R Přikryl, Á Török
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This study reports the Raman data for reduced carbonaceous matter (CM) in crystalline marbles, related to a determination of their provenance. Raman microspectrometry was tested on ‘graphitic’ marbles formed under different metamorphic conditions (regional v. contact) with various geological ages, and with distinct types of CM from the Bohemian Massif (Czech Republic). First, various modes of occurrence of CM were examined by optical microscopy (OM). The Raman results exhibited spectral variations of CM with different metamorphic grades and types. Several marble groups could be distinguished: (1) well-ordered CM/graphite of higher grade regional metamorphosed marbles; less graphitized metamorphosed organic matter (‘disordered’ CM); (2) low-grade regional metamorphosed rocks, and (3) contact metamorphosed marbles.