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Lithologically-related rare earth element variations the Mio-Pliocene Poznań Formation (Poland)

Retka J.

Geological Quarterly

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2018

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Vol. 62, No. 1

146--154

EN

Concentrations of rare earth elements (REEs) were determined in 129 clay samples collected from the Mio-Pliocene Poznań Formation in Poland. The REEs occur in a relatively wide range from 58.2 to 1,709 mg/kg. Low North American Shale Composite (NASC)-normalized total REE contents with heavy rare earth element (HREE) depletion were noted in most of the samples analysed. Small variations were detected in the REE contents in the lithologies distinguished. Red clays are characterised by slightly lower REE concentrations relative to green and grey clays. All the Poznań Formation clays exhibit a negative Eu anomaly when normalized to the average of chondrites. Values increase according to the following sequence: grey clays < red clays < green clays. The NASC-normalized REE concentration curves show a positive Eu anomaly. The LaNASC/YbNASC ratio indicates HREE depletion. A small variation in this ratio was observed in the sequence green clays > grey clays > red clays. The variability of the REE contents of the Poznań Formation decreased from west to east.

2

Problemy z korygowaniem tła w technice absorpcyjnej spektrometrii atomowej

Górecka E., Karmasz D., Retka J.

LAB Laboratoria, Aparatura, Badania

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2014

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R. 19, nr 2

24--27

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Zróżnicowanie zawartości pierwiastków śladowych w iłach poznańskich

Bojakowska I., Brański P., Iwasińska-Budzyk I., Retka J.

Górnictwo i Geologia

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2010

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T. 5, z. 4

31-40

PL

W próbkach iłów poznańskich, pobranych z 18 eksploatowanych obecnie złóż tych surowców, oznaczono zawartość pierwiastków śladowych: As, Ba, Br, Ce, Co, Cr, Cu, Ga, Hf, La, Mo, Nb, Ni, Pb, Rb, Sr, Bi, Th, U, V, Y, Zn, Zr, Cd, Sn, a także pierwiastków głównych: Ca, Mg, Fe, Mn, P, Ti, metodą fluorescencyjnej spektrometrii rentgenowskiej (XRF), zawartość rtęci, metodą spektrometrycznej absorpcji atomowej (CV-AAS) z zatężaniem na amalgamatorze oraz węgla organicznego, metodą kulometryczną. Stwierdzono zróżnicowanie w zawartości badanych składników w iłach, w zależności od ich litostratygrafii i regionu występowania.

EN

In the samples of clays of Poznań series, taken from the 18 currently operating deposites of these raw materials the content of trace elements: As, Ba, Br, Ce, Co, Cr, Cu, Ga, Hf, La, Mo, Nb, Ni, Pb, Rb, Sr, Bi, Th, U, V, Y, Zn, Zr, Cd, Sn and major elements: Ca, Mg, Fe, Mn, P, Ti were determined using X-ray fluorescence spectrometry (XRF), the mercury content was determine using spectrometry atomic absorption method (CV-AAS), and the concentration of organic carbon was determine by coulometric titration. Variability in the contents of tested components was found based on their lithostratigraphy and the region of oceurrence.