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  • 1
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    Unknown
    Late Quaternary palaeoenvironment of northern Guatemala: evidence from deep drill cores and seismic stratigraphy of Lake Petén Itzá (2010)
    Wiley-Blackwell - STM ; International Association of Sedimentologists
    In:  Sedimentology, 57 (5). pp. 1220-1245.
    Details
    Publication Date: 2019-01-24
    Description: Long sediment cores were collected in spring 2006 from Lake Petén Itzá, northern Guatemala, in water depths ranging from 30 to 150 m, as part of an International Continental Scientific Drilling Program project. The sediment records from deep water consist mainly of alternating clay, gypsum and carbonate units and, in at least two drill sites, extend back 〉200 kyr. Most of the lithostratigraphic units are traceable throughout the basin along seismic reflections that serve as seismic stratigraphic boundaries and suggest that the lithostratigraphy can be used to infer regional palaeoenvironmental changes. A revised seismic stratigraphy was established on the basis of integrated lithological and seismic reflection data from the basin. From ca 200 to ca 85 ka, sediments are dominated by carbonate-clay silt, often interbedded with sandy turbidites, indicating a sediment regime dominated by detrital sedimentation in a relatively humid climate. At ca 85 ka, an exposure horizon consisting of gravels, coarse sand and terrestrial gastropods marks a lake lowstand or partial basin desiccation, indicating dry climate conditions. From ca 85 to ca 48 ka, transgressive carbonate-clay sediments, overlain by deep-water clays, suggest a lake level rise and subsequent stabilization at high stage. From ca 48 ka to present, the lithology is characterized by alternating clay and gypsum units. Gypsum deposition correlates with Heinrich Events (i.e. dry climate), whereas clay units coincide with more humid interstadials.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1111/j.1365-3091.2009.01144.x
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
    facet.materialart.
    Unknown
    Soil chemical and mineralogical data from moraine chronosequences of the proglacial areas of Stein glacier (Sustenpass) and Griess glacier (Klausenpass) in the Swiss Alps (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-05
    Description: This dataset comprises soil chemical and mineralogical data of the moraine soil chronosequences from Sustenpass and Klausenpass in the Swiss Alps. The chronosequences span from 30 to 10,000 yrs (Sustenpass, siliceous parent material) and from 110 to 13,500 yrs (Klausenpass, calcareous parent material), respectively. Parameters include: pH (CaCl2), loss on ignition (LOI, 550°C), Corg, N. Elemental contents (measured by X-ray Fluorescence, XRF ) and calculated tau (open-system mass transport function) and mass balances for Na, Al, Mg, Si, P, K, Ca, Mn, Fe. Lastly, the bulk mineralogy of the fine earth (measured by X-ray Diffraction, XRD). Sampling was conducted in August/September 2017 at Sustenpass and Klausenpass and was part of the HILLSCAPE (Hillslope Chronosequence and Process Evolution) project's sampling campaign. pH, LOI and XRF measurements were conducted in 2017/2018 at the University of Zurich (Switzerland), the mineralogy was measured in 2020 at ETH Zurich (Switzerland), Corg and N were measured in 2020 at the University of Zurich. The calculations of the open-system mass transport function and mass balances were performed in 2021 at the University of Zurich. These data were collected to elucidate soil development in siliceous and calcareous parent materials in order to better understand the evolution of hillslope processes over time. They were described and discussed in detail in Musso et al. 2022 (doi:10.3390/geosciences12020099). For hydrological or geobotanical data from the same chronosequences, see for instance the publications of F. Maier (doi:10.1029/2021WR030223, doi:10.1029/2021WR030221, doi:10.1016/j.catena.2019.104353), K. Greinwald (doi:10.1080/15230430.2020.1859720, doi:10.1111/jvs.12993) and A. Hartmann (doi:10.5194/hess-2020-28, doi:10.5194/essd-12-3189-2020).
    Keywords: Age, relative, number of years; Aluminium oxide; Aluminium oxide, standard deviation; calcareous pedogenesis; Calcite; Calcite, standard deviation; Calcium carbonate; Calcium carbonate, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Calculated according to Musso et al., 2022; Carbon; Carbon, organic, per unit sediment mass; Carbon, organic, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Chlorite, trioctahedral; Chlorite, trioctahedral, standard deviation; chronosequence; Clinozoisite; Clinozoisite, standard deviation; Density, dry bulk; Density, dry bulk, standard deviation; DEPTH, soil; Depth, soil, maximum; Depth, soil, minimum; Depth comment; Dolomite; Dolomite, standard deviation; elemental analysis; ELEVATION; Event label; Exposition; glacial forefield; Goethite; Goethite, standard deviation; HILLSCAPE; HILLSlope Chronosequence And Process Evolution; Hornblende; Hornblende, standard deviation; Iron oxide, Fe2O3; Iron oxide, Fe2O3, standard deviation; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Kalifeldspar; Kalifeldspar, standard deviation; Klausenpass; Klausenpass_K-A1; Klausenpass_K-A2; Klausenpass_K-B1; Klausenpass_K-B2; Klausenpass_K-C1; Klausenpass_K-C2; Klausenpass_K-D1; Klausenpass_K-D2; Landform; Latitude of event; Location; Longitude of event; Loss on ignition; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; mass balance; Mass balance, Aluminium; Mass balance, Aluminium, standard deviation; Mass balance, Calcium; Mass balance, Calcium, standard deviation; Mass balance, Iron; Mass balance, Iron, standard deviation; Mass balance, Magnesium; Mass balance, Magnesium, standard deviation; Mass balance, Manganese; Mass balance, Manganese, standard deviation; Mass balance, Phosphorus; Mass balance, Phosphorus, standard deviation; Mass balance, Potassium; Mass balance, Potassium, standard deviation; Mass balance, Silicon; Mass balance, Silicon, standard deviation; Mass balance, Sodium; Mass balance, Sodium, standard deviation; Mica, dioctahedral; Mica, dioctahedral, standard deviation; Mica, interstitial; Mica, interstitial, standard deviation; moraine; Nitrogen; Nitrogen, standard deviation; open-system transport functions; organic matter; oxalate extraction; Parent material; pH calcium chloride; Phosphorus pentoxide; Phosphorus pentoxide, standard deviation; Plagioclase; Plagioclase, standard deviation; Potassium oxide; Potassium oxide, standard deviation; Quartz; Quartz, standard deviation; Rutile; Rutile, standard deviation; siliceous pedogenesis; Silicon dioxide; Silicon dioxide, standard deviation; Site; Skeleton; Slope angle; Slope description; Sodium oxide; Sodium oxide, standard deviation; Soil; SOIL; Soil horizon; soil mineralogy; Soil profile; Soil type; Sulfur trioxide; Sulfur trioxide, standard deviation; Sustenpass; Sustenpass_S-A1; Sustenpass_S-A2; Sustenpass_S-B1; Sustenpass_S-B2; Sustenpass_S-C1; Sustenpass_S-C2; Sustenpass_S-D1; Sustenpass_S-D2; Tau, Aluminium; Tau, Aluminium, standard deviation; Tau, Calcium; Tau, Calcium, standard deviation; Tau, Iron; Tau, Iron, standard deviation; Tau, Magnesium; Tau, Magnesium, standard deviation; Tau, Manganese; Tau, Manganese, standard deviation; Tau, Phosphorus; Tau, Phosphorus, standard deviation; Tau, Potassium; Tau, Potassium, standard deviation; Tau, Silicon; Tau, Silicon, standard deviation; Tau, Sodium; Tau, Sodium, standard deviation; Titanium, strain coefficient; Titanium, strain coefficient, standard deviation; Titanium dioxide; Titanium dioxide, standard deviation; World Reference Base (WRB) soil classification system; X-ray diffraction (XRD); X-ray fluorescence (XRF); Zirconium dioxide; Zirconium dioxide, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 4789 data points
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    DATA PANGAEA
  • 3
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    Unknown
    Reconciling drainage and receiving basin signatures of the Godavari River system (2018)
    Copernicus Publications on behalf of the European Geosciences Union
    Details
    Publication Date: 2022-05-25
    Description: © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Biogeosciences 15 (2018): 3357-3375, doi:10.5194/bg-15-3357-2018.
    Description: The modern-day Godavari River transports large amounts of sediment (170 Tg per year) and terrestrial organic carbon (OCterr; 1.5 Tg per year) from peninsular India to the Bay of Bengal. The flux and nature of OCterr is considered to have varied in response to past climate and human forcing. In order to delineate the provenance and nature of organic matter (OM) exported by the fluvial system and establish links to sedimentary records accumulating on its adjacent continental margin, the stable and radiogenic isotopic composition of bulk OC, abundance and distribution of long-chain fatty acids (LCFAs), sedimentological properties (e.g. grain size, mineral surface area, etc.) of fluvial (riverbed and riverbank) sediments and soils from the Godavari basin were analysed and these characteristics were compared to those of a sediment core retrieved from the continental slope depocenter. Results show that river sediments from the upper catchment exhibit higher total organic carbon (TOC) contents than those from the lower part of the basin. The general relationship between TOC and sedimentological parameters (i.e. mineral surface area and grain size) of the sediments suggests that sediment mineralogy, largely driven by provenance, plays an important role in the stabilization of OM during transport along the river axis, and in the preservation of OM exported by the Godavari to the Bay of Bengal. The stable carbon isotopic (δ13C) characteristics of river sediments and soils indicate that the upper mainstream and its tributaries drain catchments exhibiting more 13C enriched carbon than the lower stream, resulting from the regional vegetation gradient and/or net balance between the upper (C4-dominated plants) and lower (C3-dominated plants) catchments. The radiocarbon contents of organic carbon (Δ14COC) in deep soils and eroding riverbanks suggests these are likely sources of "old" or pre-aged carbon to the Godavari River that increasingly dominates the late Holocene portion of the offshore sedimentary record. While changes in water flow and sediment transport resulting from recent dam construction have drastically impacted the flux, loci, and composition of OC exported from the modern Godavari basin, complicating reconciliation of modern-day river basin geochemistry with that recorded in continental margin sediments, such investigations provide important insights into climatic and anthropogenic controls on OC cycling and burial.
    Description: This project was supported by the Swiss National Science Foundations (“CAPS LOCK” grant no. 200021-140850 and “CAPS-LOCK2” grant no. 200021-163162). Francien Peterse received funding from NWO-Veni grant (grant no. 863.13.016). Liviu Giosan thanks grants from the National Science Foundation (OCE-0841736) and Woods Hole Oceanographic Institution.
    Repository Name: Woods Hole Open Access Server
    Type: Article
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    PAPER (OA)
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