Stratigraphical studies on Lake Iidesjärvi sediments. Part II. Geological and mineralogical characteristics of the sedimentary sequence

Vuorinen, Antti; Uusinoka, R.; Alhonen, Pentti

doi:10.17741/bgsf/55.2.004

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…The second aliquot of raw sediment was leached overnight in 1 N ammonium acetate at room temperature on a shaker table. This treatment releases cations (exchangeable metals) that are weakly bound to ion exchange surfaces in the sediment (Vuorinen et al, 1983). After leaching the sample was filtered and the residue ashed and leached in 6 N HCI.…”

Section: Methodsmentioning

confidence: 99%

“…When ammonium acetate leach was applied directly to raw sediment, Ca was readily lost, suggesting that 0.1 N HCI removes some ammonium acetate leachable Ca. Vuorinen et al (1983) note that ammonium acetate mobilizes the CaCO 3 which would also be dissolved by 0.1 N HC1. When the same samples are analysed for Pb, the ammonium leachable fractions is unchanged from that obtained when ammonium leach follows 0.1 N HCI implying that the dilute acid leachable-fraction of Pb is different from the ammonium acetate-leachable one.…”

Section: Chemical Fractionation Of Lake Sedimentmentioning

confidence: 99%

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Sediment chemistry of lakes formed by surface-mining for coal in the midwestern U.S.A.

1988

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Sediment from lakes on abandoned coal mines in the Midwestern U.S.A. was examined to determine the factors controlling chemical composition and the role the sediment plays in lake neutralization. Sediment concentrations of many cations, (especially heavy metals) are strongly correlated with sediment sulfide concentration, but poorly correlated with the pH of the overlying water. Leaching the sediment of one lake with 1 N ammonium acetate, 0.1 N HCl, and 6 N HCI revealed that cations were mostly bound in weak acid-leachable and strong acid-leachable forms. The weak acid-leachable form is likely to be metal sulfides and calcium carbonate. The sulfide-poor sediments of extremely acid lakes contained few weak acid-leachable cations. Raw mine-spoil contained large amounts of easily leached cations. There is little relationship between changes in sediment chemistry over time determined from cores of lake sediment and past lake pH. Rates of sulfide deposition were examined in sediment cores because sulfate reduction and deposition has been suggested as a major source of alkalinity in lakes influenced by acid precipitation. Although the rate of sulfate deposition in surface mine lakes is high, it alone seems to be insufficient to cause neutralization.

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Section: Methodsmentioning

confidence: 99%

Section: Chemical Fractionation Of Lake Sedimentmentioning

confidence: 99%

Sediment chemistry of lakes formed by surface-mining for coal in the midwestern U.S.A.

1988

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“…The sedimentary cholorophyll was analysed spectrophotometrically from acetone extract following the method described by Vallentyne (1955). For the analytical methods of sodium, potassium, calcium, magnesium, aluminium, zinc and copper see Vuorinen et al (1983).…”

Section: Methodsmentioning

confidence: 99%

“…214). As enriched heavy metals, however, copper and zinc seem to indicate cultural eutrophication (Kemp et al 1976;Vuorinen et al 1983;Kansanen and Jaakkola 1985). In non-polluted lakes their contents are rather low, depending on the bedrock of the catchment.…”

Section: Zinc and Coppermentioning

confidence: 99%

Chemostratigraphy of the Holocene sediments of Lake Työtjärvi in southern Finland and its limnological significance

Alhonen¹

1987

Bull Geol Soc Finland

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ALHONEN, P., 1987: Chemostratigraphy of the Holocene sediments of Lake Työt-järvi in southern Finland and its limnological significance. Bull. Geol. Soc. Finland 59, Pari 2, 97-107.The significance of some chemical elements during the limnological history of Työtjärvi, a small oligohumic lake in southern Finland, is discussed. Sedimentary chlorophyll, organic matter, phosphorus, iron, manganese, magnesium, aluminium, zinc, copper, sodium, potassium and calcium were determined from the sediment core investigated, and their stratigraphical distribution was interpreted in terms of limnology. Sodium, potassium, aluminium, magnesium and, possibly also, calcium can be used as indicators of the intensity of erosion during the developmental history of Lake Työtjärvi, especially since the first signs of land use in the catchment of the lake. In contrast, the sedimentary chlorophyll, phosphorus and Fe/Mn ratio throw light on the typological development of Lake Työtjärvi, adding more details to earlier biostratigraphical results.By applying the trophic terminology it can be concluded that Lake Työtjärvi was eutrophic in its early stages during the Preboreal and Boreal periods, but that it rapidly became increasingly dys-oligotrophic at the beginning of the Atlantic period as a result of the ombrotrophic development in the adjacent bog, Varrassuo. The eutrophication associated with prehistoric land use in the catchment was the second conspicuous change in the limnological history of Lake Työtjärvi. It was not, however, continuous, and the lake remained dys-oligotrophic. The most recent change in the limnology of the lake has been the fall of the water colour, probably due to acid precipitation of anthropogenic origin.

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The character of the fine fractions of the bottom sediments of the Bohemian part of the Labe (Elbe) river

Borovec

1992

GeoJournal

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The amounts of fractions with size _--<63 oem in the bottom sediments of the Bohemian part of the Labe (Elbe) river is variable. The grain-size distribution is poorly to very poorly sorted with a mean particle size from 5.1 to 12.2 oem.The crystalline phase of recent sediments of the Labe river draining various types of parent rocks has a simple mineral composition, with predominant mica/illite, quartz, kaolinite and chlorite (!-vermiculite _smectite). There are. also very small amounts of interstratification of 10 A and 14 A sheet silicates (11-13.6 A). Small amounts of Na-rich plagioclase, K-feldspar and calcite have also been found; accessory amounts of amphibole, authigenic gypsum and pyrite are also present. Opal in diatomic tests is an omnipresent constituent. In the amorphic inorganic phase, hydrated oxides predominate, where Si >A1 >Fe >Mn in a ratio of 64: 28: 22: 1. The greatest amount of amorphous inorganic and organic phases were found in the <4 oem fraction.A considerable part of the detrital material originates from soils formed on various igneous, metamorphic and sedimentary rocks, transported to the Labe by other rivers or directly by erosion in the immediate vicinity of the Labe river.

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Stratigraphical studies on Lake Iidesjärvi sediments. Part II. Geological and mineralogical characteristics of the sedimentary sequence

Cited by 9 publications

References 24 publications

Sediment chemistry of lakes formed by surface-mining for coal in the midwestern U.S.A.

Sediment chemistry of lakes formed by surface-mining for coal in the midwestern U.S.A.

Chemostratigraphy of the Holocene sediments of Lake Työtjärvi in southern Finland and its limnological significance

The character of the fine fractions of the bottom sediments of the Bohemian part of the Labe (Elbe) river

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