CLAY MINERALS AS EVIDENCE OF VOLCANIC ACTIVITY DURING THE MIOCENE SEDIMENTATION IN THE NE PART OF THE CARPATHIAN FOREDEEP (POLAND)

Rok, strany: 1993, 81 - 92

This paper deals with detailed mineral composition of three lithological complexes distinguished in the Miocene deposits of the NE marginal parts of the Carpathian Foredeep: sandy-mudstone, coal-bearing (lignite beds) and carbonate (Lithothamnium beds). Particular attention was paid to clay minerals. The dominant clay mineral in all these complexes is dioctahedral smectite of montmorillonite type, showing a relatively high content of iron in octahedral layer. It was formed as a product of smectitization in situ of volcanic glass produced by post-orogenic volcanism within the Carpathian arc, deposited in lagoonal-deltaic and carbonate platform environments. Dynamics of depositional environment is responsible for different morphology of smectite aggregates. In rocks deposited in low-energy environment large, smectitized fragments of glass are preserved as "honeycomb" type aggregates of authigenic smectite. Immobile trace element ratios (Zr/TiO₂–Nb/Y) in smectite indicate that the parent volcanic rocks were trachyandesitic in composition.

ISO 690:

Ratajczak, T., Gorniak, K., Bahranowski, K., Szydlak, T. 1993. CLAY MINERALS AS EVIDENCE OF VOLCANIC ACTIVITY DURING THE MIOCENE SEDIMENTATION IN THE NE PART OF THE CARPATHIAN FOREDEEP (POLAND). In Geologica Carpathica Clays, vol. 2, no.2, pp. 81-92.

APA:

Ratajczak, T., Gorniak, K., Bahranowski, K., Szydlak, T. (1993). CLAY MINERALS AS EVIDENCE OF VOLCANIC ACTIVITY DURING THE MIOCENE SEDIMENTATION IN THE NE PART OF THE CARPATHIAN FOREDEEP (POLAND). Geologica Carpathica Clays, 2(2), 81-92.