Mineralogical characteristics of upper Jurassic Mikulov Marls, theCzech Republic, in relation to their thermal maturity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00096274" target="_blank" >RIV/00216224:14310/17:00096274 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.chemer.2016.11.003" target="_blank" >http://dx.doi.org/10.1016/j.chemer.2016.11.003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemer.2016.11.003" target="_blank" >10.1016/j.chemer.2016.11.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mineralogical characteristics of upper Jurassic Mikulov Marls, theCzech Republic, in relation to their thermal maturity

Popis výsledku v původním jazyce

The Upper Jurassic Marls of Mikulov present a formation that is considered to be the most promising strata to produce hydrocarbons in the Vienna basin. The marls are composed of dark pelagic marlstones that frequently contain layers of limestone with thickness reaching several hundreds of meters. Twenty-seven core samples from selected wells located in the south-eastern portion of the Czech Republic representing depths ranging from 2300 to 4500 m were analyzed by x-ray diffraction to assess bulk mineralogy and the progress of smectite illitization.Bulk mineralogy of the Mikulov Marls comprises carbonates (mean value = 54.4 mass%), clay minerals(26.6 mass%), quartz (15.0 mass%), and feldspar (1.6 mean%). In the decreasing order, the clay mineral fraction is composed of illite/mica, kaolinite, illite-smectite, and chlorite. The amount of smectite inillite-smectite decreases with depth from 70% to 28%. There is a change from random to ordered inter-stratification at the depth of 3300 m. The transition from short-range ordering (R1) to long-range ordering(R3) occurs at depths greater than 4,500 m. There was a good correspondence between thermal maturity parameters: the percentage of smectite in illite-smectite structures and vitrinite reflectance as a parameter of organic matter. The increase of the metamorphic grade was compared in respect to the geothermal gradient with adjacent basins.

Název v anglickém jazyce

Mineralogical characteristics of upper Jurassic Mikulov Marls, theCzech Republic, in relation to their thermal maturity

Popis výsledku anglicky

The Upper Jurassic Marls of Mikulov present a formation that is considered to be the most promising strata to produce hydrocarbons in the Vienna basin. The marls are composed of dark pelagic marlstones that frequently contain layers of limestone with thickness reaching several hundreds of meters. Twenty-seven core samples from selected wells located in the south-eastern portion of the Czech Republic representing depths ranging from 2300 to 4500 m were analyzed by x-ray diffraction to assess bulk mineralogy and the progress of smectite illitization.Bulk mineralogy of the Mikulov Marls comprises carbonates (mean value = 54.4 mass%), clay minerals(26.6 mass%), quartz (15.0 mass%), and feldspar (1.6 mean%). In the decreasing order, the clay mineral fraction is composed of illite/mica, kaolinite, illite-smectite, and chlorite. The amount of smectite inillite-smectite decreases with depth from 70% to 28%. There is a change from random to ordered inter-stratification at the depth of 3300 m. The transition from short-range ordering (R1) to long-range ordering(R3) occurs at depths greater than 4,500 m. There was a good correspondence between thermal maturity parameters: the percentage of smectite in illite-smectite structures and vitrinite reflectance as a parameter of organic matter. The increase of the metamorphic grade was compared in respect to the geothermal gradient with adjacent basins.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Chemie der Erde – Geochemistry

ISSN

0009-2819

e-ISSN

—

Svazek periodika

77

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

159-167

Kód UT WoS článku

000401042700011

EID výsledku v databázi Scopus

—