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  • Data  (73)
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  • 1
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    Geochemistry, grain size and radiocarbon ages of MIS 3 sediment record from Nesseltalgraben, Germany (2020)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Description: Continuous sediment profiles were taken from ravine slopes at the Nesseltalgraben site in the Northern Calcareous Alps (SE Germany, 47.6567°N 13.0467°E, 560-582 m a.s.l.) in October 2016. The profile consists of fine-grained lacustrine-palustrine sediments overlain by several metres of glacifluvial gravels and lodgement tills of the Last Glacial Maximum and underlain by a diamicton. High-resolution (2 mm steps) element counts (Ca, S, Si, K, Ti, Mn, Fe, Zn, Rb, Sr, Zr) were obtained with an XRF core scanner (Itrax, Cox Analytical Systems, Sweden). Organic geochemistry (total organic and inorganic carbon, total nitrogen, total sulphur) was analysed with an elemental analyser (Euro EA, Eurovector, Germany), grain size with a laser diffractometer (Beckman-Coulter LS 200). The sediment profiles were compiled to a composite record of 21 m length. The age model bases on 29 radiocarbon analyses of macroscopic terrestrial plant remains (byrophytes, plant debris, monocots, wood, and twigs) and a previously discovered paleomagnetic anomaly assigned to the Laschamp event. The age model covers the period 59 to 29.6 ka cal BP and assigns the record to Marine Isotope Stage (MIS) 3. The sediment record shows rapid changes in lithology, sedimentology, and geochemistry related to Dansgaard-Oeschger climatic events.
    Keywords: ALPWÜRM; Central Europe; Dansgaard-Oeschger cycles; Environmental and climatic variability during the Middle Würmian in the northern Alps; Glaciation; Grain-size analyses; Greenland interstadials; Lacustrine-palustrine sediment; Middle Würmian; paleoclimatology; Pleistocene; radiocarbon dating
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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  • 2
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    XRF, Carbon and CaCO3 data from the profiles Bok N, Bok O, Bok P on the Island of Susak (2017)
    PANGAEA
    In:  Supplement to: Profe, Jörn; Wacha, Lara; Frechen, Manfred; Ohlendorf, Christian; Zolitschka, Bernd (2018): XRF scanning of discrete samples – A chemostratigraphic approach exemplified for loess-paleosol sequences from the Island of Susak, Croatia. Quaternary International, 494, 34-51, https://doi.org/10.1016/j.quaint.2018.05.006
    Details
    Publication Date: 2024-03-01
    Description: X-ray fluorescence (XRF) scanning of discrete samples provides a time- and cost-efficient alternative to conventional geochemical analyses of discretely sampled paleoenvironmental archives. Loess-paleosol sequences (LPS) as complex terrestrial archives are thus predestinated for benchmarking this new application of the well-established XRF scanning technology. Stratigraphically incomplete outcrops, like those on the Island of Susak (Croatia), are unique paleoenvironmental archives at least for the penultimate and last interglacial/glacial cycles and provide ideal test sites. Available proxy data from previous investigations on Susak ensure validation of conclusions drawn from XRF scanning-derived data. Three representative profiles were studied to examine the potential of XRF scanning-derived element ratios as proxy for environmental processes: (1) Ca/Sr for the strength of ubiquitously present secondary calcification; (2) Rb/K for the intensity of weathering; (3) Ti/Al and Ti/Zr for changes in wind speed with Zr being additionally indicative for sediment recycling; (4) Si/Al for changes in grain-size; and (5) Br and Cl as proxies for sea spray. Furthermore, we established a multivariate statistics-based chemostratigraphy to facilitate profile correlation and to improve lithostratigraphic characterization. In conclusion, this study demonstrates that XRF scanning of discrete samples from LPS is a valuable tool for paleoenvironmental reconstruction.
    Keywords: Aluminium; Barium; Bok_N; Bok_O; Bok_P; Bromine; Calcium; Calcium carbonate; Carbon, inorganic, total; Carbon, organic, total; Carbon, total; Chlorine; Chlorine/Bromine ratio; Coherence; Confidence interval; Event label; Incoherence; Iron; Latitude of event; Lithology/composition/facies; log-Barium/Strontium ratio; log-Calcium/Strontium ratio; log-Iron/Manganese ratio; log-Rubidium/Potassium ratio; log-Rubidium/Strontium ratio; log-Silicon/Aluminium ratio; log-Titanium/Aluminium ratio; log-Titanium/Zirconium ratio; log-Zirconium/Rubidium ratio; Longitude of event; Manganese; Mean squared error; Potassium; Rubidium; SECTION, height; Silicon; Strontium; Titanium; X-ray fluorescence ITRAX core scanner, Cr-tube 30kV 40mA 100s, Bremen; X-ray fluorescence ITRAX core scanner, Mo-tube 30kV 30mA 100s, Bremen; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 18799 data points
    Location Call Number Limitation Availability
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  • 3
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    Isotopic compostion of Laguna Azul sediments (2018)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    Keywords: AGE; Argentina; AZU_03; COMPCORE; Composite Core; Depth, composite; δ13C, organic carbon; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 712 data points
    Location Call Number Limitation Availability
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  • 4
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    Geochemistry of Laguna Azul sediments (2018)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    Keywords: AGE; Argentina; AZU_03; Calcium; Calcium/Titanium ratio; Carbon, inorganic, total; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Carbon, total; COMPCORE; Composite Core; Density, dry bulk; Depth, composite; Iron; Iron/Manganese ratio; Iron/Titanium ratio; Magnetic susceptibility; Manganese; Manganese/Titanium ratio; Nitrogen, total; Opal, biogenic silica; Potassium; Potassium/Titanium ratio; Sulfur, total; Titanium; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 16348 data points
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  • 5
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    Pollen abundances in Laguna Azul sediments (2018)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    Keywords: AGE; Argentina; AZU_03; COMPCORE; Composite Core; Depth, composite; Nothofagus; Poaceae; Rumex
    Type: Dataset
    Format: text/tab-separated-values, 808 data points
    Location Call Number Limitation Availability
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  • 6
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    Diatoms in Laguna Azul sediments (2018)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    Keywords: AGE; Arcanodiscus platti; Argentina; AZU_03; Cocconeis euglypta; COMPCORE; Composite Core; Cyclotella meneghiniana; Depth, composite; Diatoms, total, per unit sediment mass; Pseudotaurosira subsalina; Staurosira venter; Staurosirella pinnata; Stephanodiscus parvus; Thalassiosira patagonica
    Type: Dataset
    Format: text/tab-separated-values, 475 data points
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  • 7
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    Sedimentology and geochemistry of late glacial and Holocene sediments from Laguna Potrok Aike, Patagonia (2007)
    PANGAEA
    In:  Supplement to: Haberzettl, Torsten; Corbella, Hugo; Fey, Michael; Janssen, Stephanie; Lücke, Andreas; Mayr, Christoph; Ohlendorf, Christian; Schäbitz, Frank; Schleser, Gerhard Hans; Wille, Michael; Wulf, Sabine; Zolitschka, Bernd (2007): Lateglacial and Holocene wet-dry cycles in southern Patagonia: chronology, sedimentology and geochemistry of a lacustrine record from Laguna Potrok Aike, Argentina. The Holocene, 17(3), 297-310, https://doi.org/10.1177/0959683607076437
    Details
    Publication Date: 2024-01-27
    Description: A high-resolution multiproxy geochemical approach was applied to the sediments of Laguna Potrok Aike in an attempt to reconstruct moist and dry periods during the past 16 000 years in southeastern Patagonia. The age–depth model is inferred from AMS 14C dates and tephrochronology, and suggests moist conditions during the Lateglacial and early Holocene (16 000–8700 cal. BP) interrupted by drier conditions before the beginning of the Holocene (13 200–11 400 cal. BP). Data also imply that this period was a major warm phase in southeastern Patagonia and was approximately contemporaneous with the Younger Dryas chronozone in the Northern Hemisphere (12 700–11 500 cal. BP). After 8650 cal. BP a major drought may have caused the lowest lake level of the record. Since 7300 cal. BP, the lake level rose and was variable until the 'Little Ice Age', which was the dominant humid period after 8650 cal. BP.
    Keywords: Laguna Potrok Aike, Patagonia; PC; Piston corer; PTA03-12
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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  • 8
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    Sedimentology and geochemistry of Oxygen Isotope Stage 3 and Holocene sediments from Laguna Potrok Aike, Patagonia (2007)
    PANGAEA
    In:  Supplement to: Haberzettl, Torsten; Kück, Barbara; Wulf, Sabine; Anselmetti, Flavio S; Ariztegui, Daniel; Corbella, Hugo; Fey, Michael; Janssen, Stephanie; Lücke, Andreas; Mayr, Christoph; Ohlendorf, Christian; Schäbitz, Frank; Schleser, Gerhard Hans; Wille, Michael; Zolitschka, Bernd (2007): Hydrological variability in southeastern Patagonia and explosive volcanic activity in the southern Andean Cordillera during Oxygen Isotope Stage 3 and the Holocene inferred from lake sediments of Laguna Potrok Aike, Argentina. Palaeogeography, Palaeoclimatology, Palaeoecology, 259(2-3), 213-229, https://doi.org/10.1016/j.palaeo.2007.10.008
    Details
    Publication Date: 2024-01-27
    Description: Seismic reflection studies in the maar lake Laguna Potrok Aike (51°58? S, 70°23? W) revealed an erosional unconformity associated with a sub-aquatic lake-level terrace at a water depth of 30m. Radiocarbon-dated, multi-proxy sediment studies of a piston core from this location indicate that the sediment below this discontinuity has an age of 45kyr BP (Oxygen Isotope Stage 3), and was deposited during an interval of high lake level. In comparison to the Holocene section, geochemical indicators of this older part of the record either point towards a different sediment source or to a different transport mechanism for Oxygen Isotope Stage 3 sediments. Holocene sedimentation started again before 6790cal. yr BP, providing a sediment record of hydrological variability until the present. Geochemical and isotopic data indicate a fluctuating lake level until 5310cal. yr BP. During the late Holocene the lake level shows a receding tendency. Nevertheless, the lake level did not drop below the 30m terrace to create another unconformity. The geochemical characterization of volcanic ashes reveals evidence for previously unknown explosive activity of the Reclús and Mt. Burney volcanoes during Oxygen Isotope Stage 3.
    Keywords: Laguna Potrok Aike, Patagonia; PC; Piston corer; PTA03-06
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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  • 9
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    Sedimentological, physical, bulk geochemical, elemental and rock magnetic properties of the Middle to Late Pleistocene Rodderberg (Eifel/Germany) (2013)
    PANGAEA
    In:  Supplement to: Zolitschka, Bernd; Rolf, Christian; Bittmann, Felix; Binot, Franz; Frechen, Manfred; Wonik, Thomas; Froitzheim, Nikolaus; Ohlendorf, Christian (2014): Pleistocene climatic and environmental variations inferred from a terrestrial sediment record - the Rodderberg Volcanic Complex near Bonn, Germany. Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, 165, 407-427, https://doi.org/10.1127/1860-1804/2014/0071
    Details
    Publication Date: 2024-01-27
    Description: The sediment record from Rodderberg potentially provides a climate and environmental record spanning at least the last ca 130 ka. Results from a low resolution pilot study reveal characteristic fluctuations that can be related to global climate variability as reflected in marine isotope stages and document the potential of this site for continuous and high-resolution investigations of the Middle to Late Pleistocene. Here we document the tentative lithology drilled, and show how the elemental composition can be interpreted with regard to lake level fluctuations, related redox conditions, but also to grain-size distribution and changes in lacustrine productivity. Finally, based on major lithological changes, a preliminary depth/age model is suggested that allows reassessing published luminescence ages from the same site.
    Keywords: Drill, hydraulic; DRILLHY; ROD11-1; Rodderberg, North Rhine-Westphalia, Germany
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Limitation Availability
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  • 10
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    Lake level reconstructions at Laguna Potrok Aike (southern Patagonia, Argentina) for the last 49 ka (2013)
    PANGAEA
    In:  Supplement to: Zolitschka, Bernd; Anselmetti, Flavio S; Ariztegui, Daniel; Corbella, Hugo; Francus, Pierre; Lücke, Andreas; Maidana, Nora; Ohlendorf, Christian; Schäbitz, Frank; Wastegård, Stefan (2013): Environment and climate of the last 51,000 years - new insights from the Potrok Aike maar lake sediment archive drilling project (PASADO). Quaternary Science Reviews, 71, 1-12, https://doi.org/10.1016/j.quascirev.2012.11.024
    Details
    Publication Date: 2024-01-27
    Description: Four seismic surveys and a stratigraphic record from southernmost Patagonia (Argentina) based on 51 AMS-14C dates obtained in the framework of ICDP expedition 5022 "Potrok Aike Maar Lake Sediment Archive Drilling Project" (PASADO) provide a database to compare the 106 m composite profile from the lake centre with piston cores from the littoral and outcrops in the catchment area. Based on event correlation using distinct volcanic ash layers with unique geochemical composition and optically stimulated luminescence (OSL) dates on feldspars, sediment records are firmly linked. This approach allows to match the sediment record with water levels during the past ca. 49 ka providing evidence for lake level variations. Reconstructed lake levels were 20 m higher than today during the last Glacial until the early Holocene. With the migration of the Southern Hemispheric Westerlies over this site the lake level dropped ca. 55 m for a period of two millennia. Thereupon the water balance was more positive again causing a stepwise rise of the lake level until the maximum was reached during the Little Ice Age with a subsequent lowering since the 20th century. We suggest that the mid- to late-Holocene lake level variation is caused by intensity changes of the Southern Hemispheric Westerlies.
    Keywords: HPC; Hydraulic piston corer; LagPotAike; PASADO; Patagonia, Province of Santa Cruz, Argentina; Potrok Aike Maar Lake Sediment Archive Drilling Project
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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