Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)
  • Metaadatok
Tartalom: http://real.mtak.hu/28597/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Submitted

Type = Article
Cím:
Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)
Létrehozó:
Németh, Tibor
Máthé, Zoltán
Pekker, Péter
Dódony, István
Kovács Kis, Viktória
Sipos, Péter
Cora, Ildikó
Kovács, Ivett
Dátum:
2015
Téma:
QD06 Mineralogy / ásványtan
Tartalmi leírás:
Boda Claystone Formation (BCF) is the host rock of the planned site for high level
nuclear waste repository in Hungary. Samples representing the dominant rock types of
BCF were studied: claystone with high illite content, albitic claystone and analcime
bearing claystone. Clay minerals in these three rock types were characterized by X-ray
powder diffraction (XRD), transmission electron microscopy (TEM) and thermal
analysis (DTA-TG), and the results were interpreted from the point of view of the
radionuclide sorption properties being studied in the future. Mineral compositions of
bulk BCF samples vary in wide ranges. In the albitic sample, besides the dominant
illite, few percent of chlorite represents the layer silicates in the clay fraction. Illite is the
dominating phase in the illitic sample, with a few percent of chlorite. HRTEM study
revealed that the thickness of illite particles rarely reaches 10 layers, usually are of 5-6
TOT layer thick. Illite crystals are generally thicker in the albitic sample than in the illitic
one. The significant difference between the clay mineral characterisitics of the
analcimous and the other two samples is that the former contains 10-20 % regularly
interstratified chlorite/smectite beside the dominant illite.
Based on the structural and chemical data two illite type minerals are present in the
BCF samples: 1M polytype containing octahedral Fe and Mg besides Al, 2M polytype
illite generally is free of Fe and Mg. Close association of very thin illite plates and
nanosized hematite crystals is typical textural feature for BCF.
The goal of this study is to provide solid mineralogical basis for further studies focusing
on radionuclide sorption properties.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Németh, Tibor and Máthé, Zoltán and Pekker, Péter and Dódony, István and Kovács Kis, Viktória and Sipos, Péter and Cora, Ildikó and Kovács, Ivett (2015) Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary). Open Geosciences. ISSN 2391-5447 (Submitted)
Kapcsolat: