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CLAY MINERALS OF A THICK SEDIMENTARY SEQUENCE IN SE PART OF THE PANNONIAN BASIN (HUNGARY)

In: Geologica Carpathica Clays, vol. 1, no. 1
Istvan Viczian
Detaily:
Rok, strany: 1992, 27 - 30
O článku:
Neogene pelitic rocks were investigated in a 4.2 km thick sequence of the borehole Doboz I representing a deep partial depression of the Pannonian Basin. This is the first continuously sampled sequence of the deep partial basins of the Hungarian Neogene. In the composition of the <2µm fraction mixed-layer illite/smectites and illite predominate while kaolinite and chlorite permanently appear in minor amounts. There is a systematic variation in the smectite proportion of mixed-layer illite/smectites due to diagenetic transformation of the primary day material. Rapid changes in the smectite proportion were observed in two narrow depth intervals at 1.0 and 3.0 km (≈ 90 to 50 to 25 %, respectively). Mixed-layers are of very undefined compostion as it is shown by diffuse basal reflections of ethylene glycol treated samples and by double maxima of the first order basal reflection of the untreated samples (≈ 14.5 Å and 11.5 ). In the clay fraction and pore spaces of Mesozoic rocks which subsided during the basin formation in the Neogene special clay minerals were formed which are indicators of a high degree of diagenetic transformation (tosudite, dickite).
Ako citovať:
ISO 690:
Viczian, I. 1992. CLAY MINERALS OF A THICK SEDIMENTARY SEQUENCE IN SE PART OF THE PANNONIAN BASIN (HUNGARY). In Geologica Carpathica Clays, vol. 1, no.1, pp. 27-30.

APA:
Viczian, I. (1992). CLAY MINERALS OF A THICK SEDIMENTARY SEQUENCE IN SE PART OF THE PANNONIAN BASIN (HUNGARY). Geologica Carpathica Clays, 1(1), 27-30.