Diagenesis to very low-grade metamorphism in lower Palaeozoic sediments: A case study from deep borehole Tobolka 1, the Barrandian Basin, Czech Republic

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F15%3A00444043" target="_blank" >RIV/67985831:_____/15:00444043 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/15:00080492 RIV/67985891:_____/15:00444043 RIV/68378297:_____/15:00444043
Result on the web
<a href="http://dx.doi.org/10.1016/j.coal.2014.12.015" target="_blank" >http://dx.doi.org/10.1016/j.coal.2014.12.015</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.coal.2014.12.015" target="_blank" >10.1016/j.coal.2014.12.015</a>

Result language
angličtina
Original language name
Diagenesis to very low-grade metamorphism in lower Palaeozoic sediments: A case study from deep borehole Tobolka 1, the Barrandian Basin, Czech Republic
Original language description
The diagenetic grade of a 2.7 km thick sequence of lower Palaeozoic marine sediments in the Tobolka 1 deep exploration borehole was investigated by analysing organic and mineral components and fluid inclusions embedded in vein minerals. The reflectance of organic matter (R-r %) increases down-section from values of about 0.77% at the top of the Devonian Srbsko Formation to values around 3% at the base of the Ordovician Letna Formation. In the Devonian and Silurian sediments the reflectance values of vitrinite-like and graptolite fragments (0.77-1.13% R-r and 1.09-1.46% R-r respectively) and the composition of fluid inclusions entrapped in vein minerals (CH4 + CO2 + complex saline solutions +/- light gaseous hydrocarbons +/- liquid petroleum; T-h = 170-230 degrees C) collectively indicate organic maturation within the high-temperature part of the oil window to the wet gas stage. In the Ordovician sediments below 1000 m, chitinozoan reflectance values (1.38-3.03% R-r) and the CH4-dominat
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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