Szczegóły publikacji
Opis bibliograficzny
A novel $VR_{o}$, $T_{max}$, and S indices conversion formulae on data from the fold-and-thrust belt of the Western Outer Carpathians (Poland) / Marta WALICZEK, Grzegorz MACHOWSKI, Paweł POPRAWA, Anna ŚWIERCZEWSKA, Dariusz WIĘCŁAW // International Journal of Coal Geology ; ISSN 0166-5162. — 2021 — vol. 234 art. no. 103672, s. 1–18. — Bibliogr. s. 15–18, Abstr. — Publikacja dostępna online od: 2020-12-23
Autorzy (5)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 132136 |
|---|---|
| Data dodania do BaDAP | 2021-01-16 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.coal.2020.103672 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | International Journal of Coal Geology |
Abstract
Results are presented on the relationships between the vitrinite reflectance VRo, the Tmax temperatures determined with Rock-Eval pyrolysis, and the smectite (S) indices representing the percentage of smectite in the mixed-layer illite-smectite (I/S) from claystones. Samples locations are recovered from the Polish part of the Outer Carpathian fold-and-thrust belt. Organic indices show thermal maturities of most outcrop samples in the range of 0.47 to 1.49% Ro and 421 to 485 °C Tmax. Inorganic S indices values range from 8 to 60%. Lateral variability of the maturity measured with both organic and inorganic indices reflects mainly differences of maximum tectonic burial in the accretionary prism and subsequent exhumation and denudation. For the Western Outer Carpathians the calculated formulae for Tmax to VRo and S to VRo conversion are VRo = 0.0152 * Tmax - 5.938 (r2 = 0.87) and VRo = 1.1432–0.01295 * S (r2 = 0.65), respectively. Maximum paleotemperatures were calculated for individual samples from S indices by applying the novel formula T = ln (1.1432–0.01295 * S) + 1.68/0.0124. The proposed new conversion formulae might be useful in other regions with a similar geological setting, i.e. for claystone formations dominated by kerogen type III in fold–and-thrust belts, characterized by rapid tectonic burial accompanied by a low geothermal gradient, as well as maturities of the sub-bituminous to the medium volatile bituminous rank (0.5 to 1.50% Ro).