GERŠLOVÁ, Eva, Vladimír OPLETAL, Ivana SÝKOROVÁ, Iva SEDLÁKOVÁ and Milan GERŠL. A Geochemical and Petrographical Characterization of Organic Matter in the Jurassic Mikulov Marls from the Czech Republic. International Journal of Coal Geology. 2015, vol. 141, MARCH, p. 42-50. ISSN 0166-5162. Available from: https://dx.doi.org/10.1016/j.coal.2015.03.002.
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Basic information
Original name A Geochemical and Petrographical Characterization of Organic Matter in the Jurassic Mikulov Marls from the Czech Republic
Authors GERŠLOVÁ, Eva (203 Czech Republic, guarantor, belonging to the institution), Vladimír OPLETAL (203 Czech Republic), Ivana SÝKOROVÁ (203 Czech Republic), Iva SEDLÁKOVÁ (203 Czech Republic, belonging to the institution) and Milan GERŠL (203 Czech Republic).
Edition International Journal of Coal Geology, 2015, 0166-5162.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10500 1.5. Earth and related environmental sciences
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 3.294
RIV identification code RIV/00216224:14310/15:00082897
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1016/j.coal.2015.03.002
UT WoS 000354341200005
Keywords in English Mikulov Marls; kerogen type; thermal maturity; vitrinite reflectance; Rock-Eval pyrolysis
Tags AKR
Tags International impact, Reviewed
Changed by Changed by: doc. Mgr. Eva Geršlová, Ph.D., učo 16745. Changed: 20/9/2018 19:37.
Abstract
In this study a Rock-Eval pyrolysis, a petrographic composition of organic matter, vitrinite reflectance and gas chromatography were undertaken on borehole cores from the Mikulov Marls in order to define the organic matter type and determine the thermal maturity. The analyzed samples covered a depth interval of between 2,300 m and 4,500 m. The studied sediments were dark-colored, moderately laminated shale’s throughout which appear uniform upon visual examination. The geochemical analyses revealed that the source rock potential of the Mikulov Marls is from fair to good. According to the Rock-Eval pyrolysis, the organic matter in the samples was classified as kerogen type II-III. This classification is not supported by the results from the other used methods. The evaluation of the organic macerals demonstrated the dominant role of liptinite with prevailing liptodetrinite accompanied by a variable content of alginite, bituminite, and sporadic sporinite and resinite. The alginite consists mainly of lamalginite, derived from colonial planktonic or benthonic algae. Based on these results, the Mikulov Marls represent the kerogen type II. These results are also supported with a strong n-alkane odd-carbon-number predominance at n-C15, n-C17 and n-C19 range on the gas chromatography.
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