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Vitrinite equivalent reflectance of Silurian black shales from the Holy Cross Mountains, Poland Cover

Vitrinite equivalent reflectance of Silurian black shales from the Holy Cross Mountains, Poland

Open Access
|Oct 2015

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: https://doi.org/10.1515/mipo-2015-0006 | Journal eISSN: 1899-8526 | Journal ISSN: 1899-8291
Language: English
Page range: 79 - 96
Submitted on: Jun 10, 2015
Accepted on: Sep 14, 2015
Published on: Oct 29, 2015
Published by: Mineralogical Society of Poland
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2015 Justyna Smolarek, Leszek Marynowski, Karol Spunda, Wiesław Trela, published by Mineralogical Society of Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.