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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Chemie der Erde – Geochemistry

ISSN

0009-2819

e-ISSN

—

Volume of the periodical

77

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

159-167

UT code for WoS article

000401042700011

EID of the result in the Scopus database

—