Glauconitic Materials from Lower Miocene Macelj-Sandstones of the Hrvatsko Zagorje, North-Western Croatia
Item
Title (Dublin Core)
eng
Glauconitic Materials from Lower Miocene Macelj-Sandstones of the Hrvatsko Zagorje, North-Western Croatia
Description (Dublin Core)
eng
The Lower Miocene Macelj-sandstones, from the western part of Hrvatsko Zagorje, are green in colour with variable amounts of glauconitic grains. This paper presents the results of mineralogical and some petrological analysis of three characteristic samples of these sandstones.
The natural sandstone samples were analysed by polarising microscope and by X-ray powder diffraction (XRD). After separation, the pure or almost pure glauconitic materials were analysed by XRD, chemical analysis and thermal analysis (TG, DTA and DTG). The results show variation, not only in the glauconitic material of the sandstone samples, but also within individual samples. The amount of smectite layers varies from <5% to approximately 40% depending on the degree of order and the stage of glauconite evolution. This is indicated by the contents of K, Al, Fe, adsorbed water and cation exchange capacity as well as XRD powder patterns.
The natural sandstone samples were analysed by polarising microscope and by X-ray powder diffraction (XRD). After separation, the pure or almost pure glauconitic materials were analysed by XRD, chemical analysis and thermal analysis (TG, DTA and DTG). The results show variation, not only in the glauconitic material of the sandstone samples, but also within individual samples. The amount of smectite layers varies from <5% to approximately 40% depending on the degree of order and the stage of glauconite evolution. This is indicated by the contents of K, Al, Fe, adsorbed water and cation exchange capacity as well as XRD powder patterns.
Creator (Dublin Core)
Tadej, N.
Slovenec, D.
Tišljar, J.
Inkret, I.
Subject (Dublin Core)
eng
Macelj-sandstones; Glauconitic materials; Glauconite; XRD powder patterns; Chemical composition; Thermal analysis; Hrvatsko Zagorje; Croatia
Publisher (Dublin Core)
Croatian Geological Survey
Date (Dublin Core)
1997
Type (Dublin Core)
text
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://hrcak.srce.hr/16668
eng
https://hrcak.srce.hr/file/25429
Source (Dublin Core)
Geologia Croatica
ISSN 1330-030X (Print)
ISSN 1333-4875 (Online)
Volume 50
Issue 1
Language (Dublin Core)
eng
Rights (Dublin Core)
info:eu-repo/semantics/openAccess
Full text of articles are freely accessable. Subscription to print issue is 500,00 Kn (80 Eur) per volume.