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  • lake sediments  (3)
  • Age model; Aluminium oxide; Baikal Drilling Project; Barium; BDP; BDP1996; BDP96-1; Calcium oxide; Cerium; Chlorite; Chlorite/standard ratio; Chromium; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Feldspar/standard ratio; Illite; Illite/standard ratio; Iron oxide, Fe2O3; Kaolinite; Kaolinite/standard ratio; Lake Baikal/Academician Ridge; Lead; Magnesium oxide; Manganese oxide; Molybdenum; Nickel; Niobium; Phosphorus pentoxide; Potassium oxide; Quartz/total intensity ratio; Rubidium; Sampling/drilling in lake; Silicon dioxide; Smectite; Smectite/standard ratio; Sodium oxide; Strontium; Thorium; Titanium dioxide; Uranium; Vanadium; X-ray diffraction TEXTUR, clay fraction; X-ray fluorescence (XRF); Yttrium; Zinc; Zirconium  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Sediments and sedimentary history of Lake Attersee (Salzkammergut, Austria) (1986)
    Springer
    Hydrobiologia 143 (1986), S. 233-246 
    Details
    ISSN: 1573-5117
    Keywords: lake sediments ; late- and postglacial history ; palynology ; biogenic carbonate production ; eutrophication ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Attersee represents a good example of a lake situated in the Northern forelands of the Northern Calcareous Alps and influenced by different sediment-supplying processes during the postglacial. Several compounds, of different origin, form the sediments of the basin. Clastics which are mainly composed of dolomites derive from the Northern Calcareous Alps. Clastic input of organic and inorganic particles is accomplished by rivers and landslides. They are responsible for the main input of siliciclasts like quartz, feldspar and mica. A high proportion of the sediment results from autochthonous biogenic carbonate precipitation. In the shallow sublittoral areas of the northern part of the lake benthic decalcification caused by encrusting macro- and micro-phytes is dominant, while in the southern and central parts of the lake epilimnetic decalcification caused by the blooming of phytoplancton is more important during summer. The total biogenic calcium carbonate production reaches about 11 000 to 12 000 metric tons a year. Nutrients and residues of cyanophytes (Oscillatoria rubescens) deriving from the eutrophic lake Mondsee were washed into lake Attersee by the Mondseeache. High amount of phosphorus in the sediments of the southern basin depicts local eutrophication in the mouth area of the Mondseeache. The average sedimentation rate in lake Attersee can be determined by different dating methods. Sedimentation rates increased during the last 110 years from 1 mm a year to 1.8–2 mm a year as a result of human activities. Five main phases in the postglacial sedimentary history can be recognized: Würm moraines and finely banded varves (before 13 000 B.P.), the early Attersee stage (from 13 000 B.P. up to 1200 B.P.), and the later Attersee stage after the Bavarian colonization (from 1200 B.P. on). Using heavy metal and isotope analyses the sedimentary history can be reconstructed in more detail for the last 100 years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026667
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  • 2
    Electronic Resource
    Electronic Resource
    Geology and sedimentary history of Lake Traunsee (Salzkammergut, Austria) (1986)
    Springer
    Hydrobiologia 143 (1986), S. 227-232 
    Details
    ISSN: 1573-5117
    Keywords: lake sediments ; clastic deposits ; sediment echography ; turbidities ; sedimentary history
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Traunsee was formed by glacial overdeepening of a pre-existing fault system. Present-day morphology is characterized by a deep (189 m) narrow trough with steep slopes (〉50°) in the southern part surrounded by the Northern Calcareous Alps. The northern part of the lake is bordered by flysch and glacial deposits with gentle slopes (〈30°) and exhibits several ridges, basins and troughs. During the late and postglacial period, more than 45 m of sediment has accumulated in the central basin. Sedimentation in the southern part of Traunsee is mainly controlled by the river Traun forming a prograding delta in the south and — within the past 50 years — by industrial tailings consisting mainly of calcite. Sediments are distributed by undercurrents and by turbidites. Cores from the central basin thus show an intercalation of Traun-derived dolomite-rich sediments with anthropogenic muds from the tailings deposited up to more than 6 km from its source. Within the northern basin, land slides from the flysch region played an important role leading to drastic changes in the morphology of slopes and adjacent basins. These slumps have persisted until historic times. Sedimentation in the shallow sublittoral regions is dominated by benthic biogenic decalcification. The frequency of turbidite sedimentation within the profundal basin decreased during the last 200 years probably due to man's activities in the drainage area such as regulation of rivers and torrents. Sedimentation rates during the past decades range from 2–3 cm/a in the southern basin to 0.4 cm/a in the northern part as shown by 137Cs-dating.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026666
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  • 3
    Electronic Resource
    Electronic Resource
    Industrial tailings in Lake Traunsee (Salzkammergut, Austria) (1986)
    Springer
    Hydrobiologia 143 (1986), S. 401-405 
    Details
    ISSN: 1573-5117
    Keywords: lake sediments ; turbidites ; tailings ; geochemistry ; environmental hazards
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tailings from salt work and a soda work have been pumped into the southern part of Traunsee (bay of Ebensee) for more than 50 years. Solid wastes have accumulated to form a pile 〉 40 m high with a total volume of 〉 3 × 106 m3. The sandy silty mud consists of calcite and other phases of CaCO3, brucite, CaO resp. Ca(OH)2 and gypsum. The chemical environment of the mud is characterized by extreme alkaline pore water (pH 〉 10 up to 12.5; total amount of pore water: 3 × 106 t) and highly negative Eh-values. These values result from the pumped tailings and from postdepositional chemical processes such as dissolution resp. reaction of CaO, brucite and gypsum and precipitation of CaCO3. The high water content of the mud and the steep slopes (〉 15°) are responsible for frequent debris flows near the waste inlet, and occasional turbidity currents flow down to the distal basin floor. One particular current may transport up to 4 × 105 m3 of alkaline mud as far as 6 km from the inlet into the profundal basin plain, intercalating with natural lake sediments. Sedimentation rates in the northern part of Traunsee within the last decades are isotopically measured as 0.4–0.5 cm/a. In the central basin the sedimentation rates within the last 50 years are in the range of 2–3 cm/a. Up to 75% of the profundal sediments consist of industrial tailings and turbidites. Thus, within a substantial portion of the profundal zone (about 15%) the benthic fauna and the chemical environment of the sediments are influenced by the alkaline tailings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026689
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  • 4
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    Geochemistry and age model of sediment core BDP96-1 (2000)
    PANGAEA
    In:  Supplement to: Müller, Jens; Oberhänsli, Hedi; Melles, Martin; Schwab, Markus J; Hubberten, Hans-Wolfgang (2000): Late Pliocene sedimentation in Lake Baikal: implications for climatic and tectonic change in SE Siberia. Palaeogeography, Palaeoclimatology, Palaeoecology, 174(4), 305-326, https://doi.org/10.1016/S0031-0182(01)00320-0
    Details
    Publication Date: 2024-01-03
    Description: Within the framework of the Baikal Drilling Project (BDP), a 192 m long sediment core (BDP-96-1) was recovered from the Academician Ridge, a submerged topographic high between the North and Central Basins of Lake Baikal. Sedimentological, clay mineralogical and geochemical investigations were carried out on the core interval between 90 and 124 m depth, corresponding to ca. 2.4-3.4 Ma. The aim was to reconstruct the climatic and tectonic history of the continental region during the intensification of Northern Hemisphere glaciation in Late Pliocene time. A major climate change occurred in the Lake Baikal area at about 2.65 Ma. Enhanced physical weathering in the catchment, mirrored in the illite to smectite ratio, and temporarily reduced bioproduction in the lake, reflected by the diatom abundance, evidence a change towards a colder and more arid climate, probably associated with an intensification of the Siberian High. In addition, the coincident onset of distinct fluctuations in these parameters and in the Zr/Al ratio suggests the beginning of the Late Cenozoic high amplitude climate cycles at about 2.65 Ma. Fluctuations in the Zr/Al ratio are traced back to changes in the aeolian input, with high values in warmer, more humid phases due to a weaker Siberian High. Assuming that the sand content in the sediment reflects tectonic pulses, the Lake Baikal area was tectonically active during the entire investigated period, but in particular around 2.65 Ma. Tectonic movements have likely led to a gradual catchment change since about 3.15 Ma from the western towards the eastern lake surroundings, as indicated in the geochemistry and clay mineralogy of the sediments. The strong coincidence between tectonic and climatic changes in the Baikal area hints at the Himalayan uplift being one of the triggers for the Northern Hemisphere Glaciation.
    Keywords: Age model; Aluminium oxide; Baikal Drilling Project; Barium; BDP; BDP1996; BDP96-1; Calcium oxide; Cerium; Chlorite; Chlorite/standard ratio; Chromium; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Feldspar/standard ratio; Illite; Illite/standard ratio; Iron oxide, Fe2O3; Kaolinite; Kaolinite/standard ratio; Lake Baikal/Academician Ridge; Lead; Magnesium oxide; Manganese oxide; Molybdenum; Nickel; Niobium; Phosphorus pentoxide; Potassium oxide; Quartz/total intensity ratio; Rubidium; Sampling/drilling in lake; Silicon dioxide; Smectite; Smectite/standard ratio; Sodium oxide; Strontium; Thorium; Titanium dioxide; Uranium; Vanadium; X-ray diffraction TEXTUR, clay fraction; X-ray fluorescence (XRF); Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 9282 data points
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