Abstract
Peat sediments represent important environmental and climatic archives, as well as recording information on the processes affecting the formation of these deposits; combined these data can be used for paleoreconstruction of peat-bogs. In this paper we characterize heavy mineral-rich sandy layers from two peat-bog sites in Mizerów and Strumień (Poland). In both cases, the most common identified mineral suite is: epidote, staurolite, tourmaline (dravite and schörl), garnet, spinel, Al2SiO5 polymorphs (sillimanite, kyanite, andalusite), amphibole (mainly hornblende), pyroxene (e.g., richterite, diopside), perovskite, topaz, cordierite, apatite, monazite, chromite, ilmenite, chlorite, iron oxides, rutile and siderite. This mineral suite is characteristic of a metamorphic aureole surrounding a magmatic body. Pyrite is likely authigenic in origin. Apatite and monazite were employed for U-Pb and CHIME dating, respectively. Based on the U-Pb age information composition and textural features of selected minerals, different provenance areas were indicated: the Tatra Massif, the Bohemian Massif, and the Silesian Basin area. Transport of the investigated mineral phases was linked to development of both the Odra (praOdra) and the Vistula valleys.
Highlights
Peat-bogs are the important components of temperate landscapes, which form under particular environmental conditions
Palynological analysis and radiocarbon dating suggest that the alluvial fan on the Vistula River and other Carpathian-derived rivers formed mainly in the Pleniglacial of the last glaciation, while the older proluvial remnants are preserved as residues [21]
This paper presents a detailed characterisation of heavy minerals from peats in the Carpathian
Summary
Peat-bogs are the important components of temperate landscapes, which form under particular environmental conditions. They are associated with specific vegetation types. Peat-bogs are regarded as archives of past vegetation changes associated with both the regional climate and the evolution of the local environment. This type of biogenic reservoir may be exposed to external factors, including periodic hydrological changes, fires, etc. When peat-bogs are frequently flooded, allochthonous sandy material may be delivered into the bog system. Another common process that can supply detritus is aeolian activity [1]
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