Date noi privind compozitia mineralogica a siltului lutitic de la Dumbrava, judetul Cluj (New Mineralogical Data on the Clayey Silt from Dumbrava (Cluj County)

Authors

Lucreția Ghergari, Universitatea Babeş-Bolyai Cluj-NapocaFollow
Corina Ionescu, Universitatea Babeş-Bolyai Cluj-NapocaFollow
Cristina Mariș, Exploatarea minieră Căpuş (jud. Cluj).

Abstract

New Mineralogical Data on the Clayey Silt from Dumbrava (Cluj County). New mineralogical data on the lutitic silt occurrence from the Dumbrava (Cluj County, Romania), based on TEM and X-ray diffraction studies, are presented in the paper. Mainly kaolinite, and subordinately illite and illite/montmorillonite represent the mineralogical compounds of the clayey fraction of the rock. The lutitic silt represents a local facies, sedimented in subaquatic environments (a small lake or pool) after a short-distance transport from the sources. The source for the brown clays was probably a paleosoil formed nearby magmatic rocks. The source for the light coloured clays (creamy gray) was the alterated zone of metamorphic rocks.

Recommended Citation

Ghergari, Lucreția; Ionescu, Corina; and Mariș, Cristina (2000) Date noi privind compozitia mineralogica a siltului lutitic de la Dumbrava, judetul Cluj (New Mineralogical Data on the Clayey Silt from Dumbrava (Cluj County), Studia UBB Geologia 45 (1): 23-34
DOI: http://dx.doi.org/10.5038/1937-8602.45.1.2
Available at: https://digitalcommons.usf.edu/geologia/vol45/iss1/art2