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Title: Vitrinite equivalent reflectance of Silurian black shales from the Holy Cross Mountains, Poland
Authors: Smolarek, Justyna
Marynowski, Leszek
Spunda, Karol
Trela, Wiesław
Keywords: Holy Cross Mountains; Lower Silurian; maturation; graptolite reflectance; black shales
Issue Date: 2014
Citation: Mineralogia, Vol. 45, no. 3/4 (2014), s. 99-120
Abstract: A number of independent methods have been used to measure the thermal maturity of Silurian rocks from the Holy Cross Mountains in Poland. Black shales are characterized by diverse TOC values varying from 0.24-7.85%. Having calculated vitrinite equivalent reflectance using three different formulas, we propose that the most applicable values for the Silurian rocks are those based on Schmidt et al. (2015) equation. Based on this formula, the values range from % 0.71 VReqvVLR (the vitrinite equivalent reflectance of the vitrinite-like macerals) to % 1.96 VReqvVLR. Alternative, complementary methods including Rock Eval pyrolysis and parameters based on organic compounds (CPI, Pr/n-C17, Ph/n-C18, MPI1, and MDR) from extracts did not prove adequate as universal thermal maturity indicators. We have confirmed previous suggestions that Llandovery shales are the most likely Silurian source rocks for the generation of hydrocarbons in the HCM.
DOI: 10.1515/mipo-2015-0006
ISSN: 1899-8291
Appears in Collections:Artykuły (WNP)

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