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  • 1
    Call number: SR 90.0909(85)
    In: Documents du BRGM
    Type of Medium: Series available for loan
    Pages: S-13, 650 S.
    ISBN: 2715900511
    Series Statement: Documents du BRGM 85
    Language: French
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
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    PANGAEA
    In:  Supplement to: Hermoso, Michael; Minoletti, Fabrice; Le Callonnec, Laurence; Jenkyns, Hugh C; Hesselbo, Stephen P; Rickaby, Rosalind E M; Renard, Maurice; de Rafélis, Marc; Emmanuel, Laurent (2009): Global and local forcing of Early Toarcian seawater chemistry: A comparative study of different paleoceanographic settings (Paris and Lusitanian basins). Paleoceanography, 24(4), PA4208, https://doi.org/10.1029/2009PA001764
    Publication Date: 2023-05-12
    Description: The Early Toarcian was characterized by two large perturbations to the carbon cycle: a positive trend associated with increased organic matter burial and ocean anoxia, and a pronounced negative carbon isotope excursion (CIE). We contrast the geochemical evolution in the carbonate phases of two successions: one from the Paris Basin (Sancerre core, comprising black shales), the other from the Lusitanian Basin (Peniche section with very minor lithological expression of bottom water anoxia). Our aim was to identify whether these carbon cycle perturbations were related, and differentiate between the common (global) versus regional expressions of the biogeochemical response and ocean chemistry. Our results highlight contrasts in timing of different phases of anoxia in both locations through the widely documented negative CIE. Widespread anoxic conditions were not a necessary prerequisite for generating a pronounced CIE, as required by the recycling (so-called "Küspert") model. The production of carbonate simultaneously dropped during the d13C negative shift in both locations, likely in response to lowered seawater saturation rate induced by substantial absorption of CO2 from the atmosphere. The recovery interval was accompanied by a rapid reestablishment of seawater alkalinity, and primary and carbonate productivity in epicontinental seas, as evidenced by high d13C and Sr/Ca, in contrast with the more open ocean regime in the Lusitanian Basin. Our results confirm that parallels can be draw between the ocean productivity response and feedback during the Toarcian CIE and the PETM. Both events are characterized by ocean acidification and reduced pelagic calcification followed by a peak in nearshore coccolith productivity, which could have helped the recovery from the perturbation.
    Keywords: HAND; Peniche; Portugal; Sampling by hand
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 3
    Publication Date: 2023-05-12
    Keywords: -; Deep Sea Drilling Project; DSDP; Elements; see reference(s)
    Type: Dataset
    Format: text/tab-separated-values, 24 data points
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  • 4
    Publication Date: 2023-05-12
    Keywords: Calcite; Calcium; Calcium carbonate; Dolomite; HAND; Iron; Magnesium; Manganese; Peniche; Portugal; Sampling by hand; SECTION, height; Strontium; X-ray diffraction (XRD)
    Type: Dataset
    Format: text/tab-separated-values, 486 data points
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  • 5
    Publication Date: 2023-05-12
    Keywords: Calcite; Calcium; Calcium carbonate; DEPTH, sediment/rock; Dolomite; HAND; Iron; Magnesium; Manganese; Peniche; Portugal; Sampling by hand; Strontium; X-ray diffraction (XRD)
    Type: Dataset
    Format: text/tab-separated-values, 486 data points
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  • 6
    Publication Date: 2023-06-27
    Keywords: 72-516F; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Factor 1; Factor 2; Glomar Challenger; Leg72; Sample code/label; see reference(s); South Atlantic/CONT RISE
    Type: Dataset
    Format: text/tab-separated-values, 186 data points
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  • 7
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    PANGAEA
    In:  Supplement to: Renard, Maurice; Ambroise, Daniel (1983): Study of geochemical data (Eocene-Santonian Samples) from Hole 516F (Leg 72) by the method of correspondence analysis. In: Barker, PF; Carlson, RL; Johnson, DA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 72, 829-832, https://doi.org/10.2973/dsdp.proc.72.139.1983
    Publication Date: 2023-06-27
    Description: This study involves samples of Santonian to Eocene age (Cores 516F-125 to 516F-38) taken from the Rio Grande Rise in the South Atlantic Ocean. These samples are from DSDP Site 516 occupied during Leg 72 of the Glomar Challenger (details given in site chapter, Site 516, this volume). Only Santonian to Paleocene cores have been well sampled, and analyses of the Eocene samples are preliminary results. Results of the trace element analyses (Mg, Sr, Mn, Ni, Fe, Na, K) of the carbonate fraction and CaCO3 percentage for each sample can be found in Renard and others (1983). Whole geochemical data are treated by the statistical method of correspondence analysis. Oxygen and carbon isotopic ratios measured on samples close to the Cretaceous/Tertiary boundary are not used in this study.
    Keywords: 72-516F; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg72; South Atlantic/CONT RISE
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 8
    Publication Date: 2023-06-27
    Keywords: 72-516F; Calcium carbonate; Chromium; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Iron; Leg72; Magnesium; Manganese; Nickel; Potassium; Sample, optional label/labor no; Sample code/label; see reference(s); Sodium; South Atlantic/CONT RISE; Strontium
    Type: Dataset
    Format: text/tab-separated-values, 682 data points
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  • 9
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    PANGAEA
    In:  Supplement to: Andrianiazy, Annick; Renard, Maurice (1985): Trace element contents of carbonates from Holes 549 and 550B (Leg 80): Comparison with some Tethyan and Atlantic sites. In: De Graciansky, PC; Poag, CW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Gov. Printing Office), 80, 1055-1072, https://doi.org/10.2973/dsdp.proc.80.150.1985
    Publication Date: 2023-06-27
    Description: The evolution through time of trace element contents (Sr, Mg, Mn, and Fe) of sediments at Sites 549 and 550 is similar to that of previously studied oceanic sites. A comparison with some North Atlantic sites and with outcrops of the Gubbio section (Italy) allowed us to show that 1. A negative correlation between Sr and Mg contents, generally characteristic of pelagic carbonate having undergone diagenesis, is confirmed. 2. Magnesium diagenesis occurs over a relatively short time and is sensitive to the sedimentation rate of each individual time period, whereas Sr diagenesis is a long-term phenomenon and is sensitive to the overall average sedimentation rate at the site. Strontium loss by sediments is related to sediment age (i.e., residence time of sediments in a given diagenetic environment) and could be a rough method of dating individual sediment layers. 3. The nature of the seafloor (oceanic or continental) does not appear to play an important part in the content of Fe and Mn in sediments. Their distribution depends more on mid-oceanic ridge activity, paleodepth (through mediation of CaCO3 dissolution and environment), and distance of the site from the ridge.
    Keywords: 80-549; 80-549A; 80-550B; Atomic absorption spectrometry (AAS); Calcium carbonate; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Iron; Latitude of event; Leg80; Longitude of event; Magnesium; Manganese; North Atlantic/PLAIN; North Atlantic/SPUR; Sample code/label; Strontium; X-ray diffraction (XRD)
    Type: Dataset
    Format: text/tab-separated-values, 1032 data points
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  • 10
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    PANGAEA
    In:  Supplement to: Renard, Maurice; Richebois, Gilbert; Létolle, René (1983): Trace element and stable isotope geochemistry of Paleocene to Coniacian carbonate samples from Hole 516F, comparison with North Atlantic and Tethys Sites. In: Barker, PF; Carlson, RL; Johnson, DA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 72, 399-420, https://doi.org/10.2973/dsdp.proc.72.111.1983
    Publication Date: 2023-06-27
    Description: This paper presents data on trace elements (Sr, Mg, Na, K, Mn, Fe, Ni, Cr) and isotopes (13C, 18O) on the carbonate fraction of bulk sediments from the Coniacian to Paleocene samples of Hole 516F. Relationships of trace elements to mineralogy and stratigraphic position are discussed at length, with special emphasis on 1) the differences between Hole 516F and other oceanic sites, and 2) the transitions observed at the Cretaceous/Tertiary boundary. Isotope data are compared to those obtained in other localities of the same age. The sections show the same major 13C variations at the Cretaceous/Tertiary boundary, indicating that this event is a planetary phenomenon.
    Keywords: 72-516F; Atomic absorption spectrometry (AAS); Calcium carbonate; Chromium; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Iron; Leg72; Magnesium; Manganese; Nickel; Potassium; Sample code/label; see reference(s); Sodium; South Atlantic/CONT RISE; Strontium; X-ray diffraction (XRD); δ13C, carbonate; δ18O, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 988 data points
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