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Mineralizacja markasytowo-hematytowo-ankerytowa w południowo-wschodniej części Gór Świętokrzyskich

Nieć M., Pawlikowski M.

Przegląd Geologiczny

2015

Vol. 63, nr 4

219–-227

The occurrences of previously unknown, iron sulphide (marcasite-pyrite)-hematite and ankerite mineralization have been recorded in the eastern part of the Holy Cross Mts. They are located in the fault zones within Middle Devonian dolomites. Irregular recrystalization of dolomite and its replacement by illite is an accompanying peculiar feature. Similar disseminated pyrite-hematite mineralization is known in the hanging wall of the Rudki iron sulphide ore deposit. The occurrence and mineral composition of this mineralization allow to suppose it was formed by low temperature hydrothermal processes, close to the end of the Variscan orogeny.

Clay minerals as palaeoenvironmental indicators in the Bathonian (Middle Jurassic) ore-bearing clays from Gnaszyn, Kraków-Silesia Homocline

Dudek T.

Acta Geologica Polonica

2012

Vol. 62, no. 3

297-305

This paper reports the results of X-ray diffraction quantitative mineralogical studies of the clay-rich Middle Jurassic sedimentary rocks from Gnaszyn, central Poland and their palaeoenvironmental interpretation. The palaeoenvironmental interpretation is aided by the fact that the sediments have not been significantly altered by diagenesis. The mineral composition is uniform throughout the succession: quartz, K-feldspar, plagioclase, calcite, gypsum, anhydrite, pyrite, illite, kaolinite, chlorite, and glauconite. The clay assemblage is dominated by illite, which alone accounts for about 20 wt% of the total mineral content. Kaolinite amounts usually <10 wt% and chlorite and glauconite occur in subordinate quantities. The clay mineral assemblage is largely of detrital origin and indicates rather cool and/or dry climatic conditions favouring mechanical erosion of the source rocks.

Wpływ illitu na parametry geotechniczne niektórych skał i gruntów spoistych

Jaremski J.

Zeszyty Naukowe. Budownictwo / Politechnika Śląska

2007

z. 111

177-183

Zwietrzeliny margli, zwietrzeliny fliszu, grunty spoiste teras rzecznych i grunty lessowe wykazują pewne progowe zawilgocenia, przy których tracą wytrzymałość. Wykonane badania doprowadziły do stwierdzenia, że przyczyną tej wspólnej cechy wspomnianych ośrodków gruntowych jest obecność minerałów ilastych. W pracy przedstawiono wpływ illitu na parametry geotechniczne zwietrzeliny margli opolskich i fliszu karpackiego. Nawiązano także do koncepcji budowy małych zbiorników retencyjnych na obszarze górzystym Podkarpacia.

Weathered marls, flysch weathering, cohesive soils of the river terraces and loess soils reveal the threshold moistures in condition of loss of their strength. The executed tests have resulted in statement that existence of clay minerals was a reason of this common characteristic for mentioned grounds. In the contribution influence of illite on geotechnical parameters of weathered Opole marls and the Carpathian flysch has been presented. This work refers also to the conception of building of small storage reservoirs in mountainous area of Podkarpacie.