Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)

Tibor Németh, Zoltán Máthé, Péter Pekker, I. Dódony, Viktória Kovács-Kis, Péter Sipos, Ildikó Cora, Ivett Kovács

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Boda Claystone Formation (BCF) is the host rock of the planned site for high level nuclear waste repository inHungary. Samples representing the dominant rock types of BCF were studied: albitic claystone, claystone with high illite content, and analcime bearing claystone. Clay minerals in these three rock types were characterized by Xray powder diffraction (XRD), transmission electron microscopy (TEM) and thermal analysis (DTA-TG), and the results were discussed 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 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 andMg. 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.

Original languageEnglish
Pages (from-to)259-274
Number of pages16
JournalOpen Geosciences
Volume8
Issue number1
DOIs
Publication statusPublished - Apr 1 2016

Fingerprint

claystone
illite
mineralogy
clay
chlorite
clay mineral
radionuclide
sorption
crystal
analcime
mineral
repository
rock
smectite
radioactive waste
hematite
diffraction
host rock
transmission electron microscopy
silicate

Keywords

  • analcime
  • hematite
  • HRTEM
  • illite polytypes
  • nuclear waste repository

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

Németh, T., Máthé, Z., Pekker, P., Dódony, I., Kovács-Kis, V., Sipos, P., ... Kovács, I. (2016). Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary). Open Geosciences, 8(1), 259-274. https://doi.org/10.1515/geo-2016-0024

Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary). / Németh, Tibor; Máthé, Zoltán; Pekker, Péter; Dódony, I.; Kovács-Kis, Viktória; Sipos, Péter; Cora, Ildikó; Kovács, Ivett.

In: Open Geosciences, Vol. 8, No. 1, 01.04.2016, p. 259-274.

Research output: Contribution to journalArticle

Németh, T, Máthé, Z, Pekker, P, Dódony, I, Kovács-Kis, V, Sipos, P, Cora, I & Kovács, I 2016, 'Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)', Open Geosciences, vol. 8, no. 1, pp. 259-274. https://doi.org/10.1515/geo-2016-0024
Németh, Tibor ; Máthé, Zoltán ; Pekker, Péter ; Dódony, I. ; Kovács-Kis, Viktória ; Sipos, Péter ; Cora, Ildikó ; Kovács, Ivett. / Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary). In: Open Geosciences. 2016 ; Vol. 8, No. 1. pp. 259-274.
@article{539f74db0bb047be9db112db286e6322,
title = "Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)",
abstract = "Boda Claystone Formation (BCF) is the host rock of the planned site for high level nuclear waste repository inHungary. Samples representing the dominant rock types of BCF were studied: albitic claystone, claystone with high illite content, and analcime bearing claystone. Clay minerals in these three rock types were characterized by Xray powder diffraction (XRD), transmission electron microscopy (TEM) and thermal analysis (DTA-TG), and the results were discussed 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 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 andMg. 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.",
keywords = "analcime, hematite, HRTEM, illite polytypes, nuclear waste repository",
author = "Tibor N{\'e}meth and Zolt{\'a}n M{\'a}th{\'e} and P{\'e}ter Pekker and I. D{\'o}dony and Vikt{\'o}ria Kov{\'a}cs-Kis and P{\'e}ter Sipos and Ildik{\'o} Cora and Ivett Kov{\'a}cs",
year = "2016",
month = "4",
day = "1",
doi = "10.1515/geo-2016-0024",
language = "English",
volume = "8",
pages = "259--274",
journal = "Open Geosciences",
issn = "2391-5447",
publisher = "Walter de Gruyter GmbH & Co. KG",
number = "1",

}

TY - JOUR

T1 - Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)

AU - Németh, Tibor

AU - Máthé, Zoltán

AU - Pekker, Péter

AU - Dódony, I.

AU - Kovács-Kis, Viktória

AU - Sipos, Péter

AU - Cora, Ildikó

AU - Kovács, Ivett

PY - 2016/4/1

Y1 - 2016/4/1

N2 - Boda Claystone Formation (BCF) is the host rock of the planned site for high level nuclear waste repository inHungary. Samples representing the dominant rock types of BCF were studied: albitic claystone, claystone with high illite content, and analcime bearing claystone. Clay minerals in these three rock types were characterized by Xray powder diffraction (XRD), transmission electron microscopy (TEM) and thermal analysis (DTA-TG), and the results were discussed 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 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 andMg. 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.

AB - Boda Claystone Formation (BCF) is the host rock of the planned site for high level nuclear waste repository inHungary. Samples representing the dominant rock types of BCF were studied: albitic claystone, claystone with high illite content, and analcime bearing claystone. Clay minerals in these three rock types were characterized by Xray powder diffraction (XRD), transmission electron microscopy (TEM) and thermal analysis (DTA-TG), and the results were discussed 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 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 andMg. 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.

KW - analcime

KW - hematite

KW - HRTEM

KW - illite polytypes

KW - nuclear waste repository

UR - http://www.scopus.com/inward/record.url?scp=84968645209&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84968645209&partnerID=8YFLogxK

U2 - 10.1515/geo-2016-0024

DO - 10.1515/geo-2016-0024

M3 - Article

VL - 8

SP - 259

EP - 274

JO - Open Geosciences

JF - Open Geosciences

SN - 2391-5447

IS - 1

ER -