Application of fluorescent light microscopy to enhanced microfacies analysis of Jurassic carbonate rocks, SE Bohemian Massif

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F20%3A00000417" target="_blank" >RIV/00025798:_____/20:00000417 - isvavai.cz</a>

Result on the web

<a href="https://journals.muni.cz/gvms/article/viewFile/12399/11740" target="_blank" >https://journals.muni.cz/gvms/article/viewFile/12399/11740</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5817/GVMS2020-12399" target="_blank" >10.5817/GVMS2020-12399</a>

Result language

angličtina

Original language name

Application of fluorescent light microscopy to enhanced microfacies analysis of Jurassic carbonate rocks, SE Bohemian Massif

Original language description

Upper Jurassic limestones and dolomites of the Vranovice Formation occur on the southeasternslopes of the Bohemian Massif below the Western Carpathian thrust belt. Theyrepresent a special type of reservoir rocks in the potential geothermal systems and exhibithighly variable porosity, permeability, and flow mechanisms due to different type of diagenesisand pervasive dolomitization. Fluorescence and translucent light microscopy was usedfor more detailed petrographic analysis of Vranovice limestones and dolomites. Isopachous,syntaxial and dolomitic cements were distinguished along with fossils recrystallization. Twogenerations of dolomite were identified – replacement dolomite and zonal cementationdolomite, what suggests a number of changes in the formation water chemistry during thedolomitization process. Extent of the observed dolomitization is inversely related to theporosity of the Jurassic rocks. Postdiagenetic generation of fissures cutting the strata dueto tectonic deformation is documented by bright fluorescent color. In the studied samplesof Vranovice limestones and dolomites the fissures represent the most important migrationpathways, more than pore throats themselves. Further genetic information on petroleummigration is interpreted from intercrystalline porosity filled with precipitated solid bitumen.Present results provide basis for further investigations in pore-water-rock interactions andchanges in chemical conditions during diagenesis.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Geologické výzkumy na Moravě a ve Slezsku

ISSN

1212-6209

e-ISSN

—

Volume of the periodical

27

Issue of the periodical within the volume

1-2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

5

Pages from-to

106-110

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-85103329048