Trace elements in garnets of felsic granulites as sediment provenance indicators

ČOPJAKOVÁ, Renata, Petr SULOVSKÝ a Bruce PATERSON. Trace elements in garnets of felsic granulites as sediment provenance indicators. Journal of the Czech Geological Society. Praha: Czech Geological Society, 2003, roč. 48, 1-2, s. 34-35. ISSN 1210-8197.

Základní údaje

Originální název

Trace elements in garnets of felsic granulites as sediment provenance indicators

Název česky

Trace elements in garnets of felsic granulites as sediment provenance indicators

Název anglicky

Trace elements in garnets of felsic granulites as sediment provenance indicators

Autoři

ČOPJAKOVÁ, Renata (203 Česká republika, garant), Petr SULOVSKÝ (203 Česká republika) a Bruce PATERSON (826 Velká Británie a Severní Irsko)

Vydání

Journal of the Czech Geological Society, Praha, Czech Geological Society, 2003, 1210-8197

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Další údaje

Jazyk

čeština

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14310/03:00058723

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

garnet chemistry; trace elements; granulites; foreland basin; provenance; Bohemian Massif; European Variscides

Štítky

Bohemian massif, European Variscides, foreland basin, garnet chemistry, granulites, provenance, trace elements

Příznaky

Mezinárodní význam, Recenzováno

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Anotace

V originále

The Lower Carboniferous Culm Basin is part of the larger European Variscan foreland basin. The youngest sediments of the Myslejovice Formation contain heavy mineral assemblages dominated by pyrope-almandine garnets. This paper compares the major element (electron microprobe) and trace element (LA-ICP-MS) compositions of detrital pyrope-almandine garnets from the Luleč Conglomerates with garnets from selected granulites of the Czech Massif for the purpose of studying the provenance of the Culm sediments. Detrital low grossular pyrope-almandine garnets can only be matched with some granulites and leptynites of the Bohemian Massif. At the present-day level of erosion of the Bohemian Massif, granulite garnets have higher calcium and/or lower magnesium concentrations. The compositions and zoning patterns of pyrope-almandine garnets from the Luleč quarry compare well with granulite garnets from the Miroslav Crystalline Unit and small Moldanubian granulite bodies west of Jihlava. Pyrope-almandine garnets from leptynites of the Polička Crystalline Unit and the Náměšť Granulite Massif show large differences in REE patterns. The results indicate that the sediment provenance may well have been changing during the deposition of the Luleč Conglomerates.

Anglicky

The Lower Carboniferous Culm Basin is part of the larger European Variscan foreland basin. The youngest sediments of the Myslejovice Formation contain heavy mineral assemblages dominated by pyrope-almandine garnets. This paper compares the major element (electron microprobe) and trace element (LA-ICP-MS) compositions of detrital pyrope-almandine garnets from the Luleč Conglomerates with garnets from selected granulites of the Czech Massif for the purpose of studying the provenance of the Culm sediments. Detrital low grossular pyrope-almandine garnets can only be matched with some granulites and leptynites of the Bohemian Massif. At the present-day level of erosion of the Bohemian Massif, granulite garnets have higher calcium and/or lower magnesium concentrations. The compositions and zoning patterns of pyrope-almandine garnets from the Luleč quarry compare well with granulite garnets from the Miroslav Crystalline Unit and small Moldanubian granulite bodies west of Jihlava. Pyrope-almandine garnets from leptynites of the Polička Crystalline Unit and the Náměšť Granulite Massif show large differences in REE patterns. The results indicate that the sediment provenance may well have been changing during the deposition of the Luleč Conglomerates.