Other language confidence: 0.625105621866001
A total of 556 samples (3 cm average sample spacing) were collected from the 12 m long Winsenberg section in order to reconstruct a floating timescale using cyclostratigraphic methods and to investigate paleoclimatic dynamics using selected elemental ratios. Samples were measured as a powder covered with Chemplex film on a Bruker S1 Titan 800 portable XRF at the University of Münster with the following settings: 40 kV, 20 mA, no filters, 75 s. Spectra were deconvoluted in Bruker Artrax software, and linearly calibrated using a set of 10 sedimentary standards of known composition and 11 calcite-quart mixtures. The composition of these standards is also included. Selected elemental ratios were tuned via the methods described in the accompanying manuscript, and are included in this dataset as well.
A total of 34 samples (35 cm average sample spacing) were analysed for organic carbon d13C in order to identify the two characteristic positive excursions associated with the Lower and Upper Kellwasser Events. Measurements were carried out at the Analytical, Environmental and Geo-Chemistry Research Group (AMGC) of the Vrije Universiteit Brussel (Belgium). The samples were decarbonated with 10% HCl in two steps, rinsed with milliQ water, and dried in an oven at 50°C. Total organic carbon (TOC) contents and δ13Corg compositions were determined on a Euro EA 150 Elemental Analyzer (CHNS) - Euro Vector HT-PyrOH combustion system coupled to a Nu-Instruments Horizon 2 isotope ratio mass spectrometer. The results were calibrated using two international standards, IAEA-C6 (sucrose: δ13C = -10.45‰) and IA-R068 (soy protein: δ13C = -25.22‰), together with reference material IVA33802151, which is calibrated against these international standards (organic-rich sediment: δ13C = -28.85‰). This calibration was verified with a further reference material, IVA33802153 (organic-rich soil: δ13C = -22.88‰).
A total of 34 samples (35 cm average sample spacing) were analysed for organic carbon d13C in order to identify the two characteristic positive excursions associated with the Lower and Upper Kellwasser Events. Measurements were carried out at the Analytical, Environmental and Geo-Chemistry Research Group (AMGC) of the Vrije Universiteit Brussel (Belgium). The samples were decarbonated with 10% HCl in two steps, rinsed with milliQ water, and dried in an oven at 50°C. Total organic carbon (TOC) contents and δ13Corg compositions were determined on a Euro EA 150 Elemental Analyzer (CHNS) - Euro Vector HT-PyrOH combustion system coupled to a Nu-Instruments Horizon 2 isotope ratio mass spectrometer.
A total of 556 samples (3 cm average sample spacing) were collected from the 12 m long Winsenberg section in order to reconstruct a floating timescale using cyclostratigraphic methods and to investigate paleoclimatic dynamics using selected elemental ratios. Samples were measured as a powder covered with Chemplex film on a Bruker S1 Titan 800 portable XRF at the University of Münster with the following settings: 40 kV, 20 mA, no filters, 75 s. Spectra were deconvoluted in Bruker Artrax software, and linearly calibrated using a set of 10 sedimentary standards of known composition and 11 calcite-quart mixtures. The composition of these standards is also included. Selected elemental ratios were tuned via the methods described in the accompanying manuscript, and are included in this dataset as well.
We analyzed 10 samples from the FB2001 depth interval 10-9 m for their Total Organic Carbon (TOC) content. This new data set is supplementary to the existing TOC record of Bauersachs et al. (2014) for the depth interval 145-1 m of the same core. The new samples were measured due to low spatial resolution of the existing TOC data set (~two samples per meter; Bauersachs et al., 2014; doi:10.1016/j.palaeo.2014.06.015) relative to the gamma-ray data (~10 data points per meter), and thus allow for a same-resolution assessment of the gamma-ray/TOC relationship. For the TOC measurements we followed the protocol of Bauersachs et al. (2014). In short, the dried and powdered sediment samples (ca. 30 mg) were pretreated with excess 2M hydrochloric acid (HCl) to remove carbonates, neutralized with distilled water, and again dried at 50 °C for 24 h. Subsequently, samples were measured in duplicates using a CS-Analyser 144DR (Leco Coopeation) at the Institute of Earth Sciences at Heidelberg University with a sample reproducibility of < 0.5%.
The methodology for total organic carbon (TOC) and δ13CTOC measurement followed Bauersachs et al. (2014, doi:10.1016/j.palaeo.2014.06.015). In brief, for TOC concentrations, sediment samples (approximately 30 mg) were dried and powdered, pretreated with excess 2M hydrochloric acid (HCl) to eliminate carbonates, neutralized with distilled water, and dried at 50°C for 24 hours. Subsequently, samples were analyzed in duplicates using a CS-Analyser 144DR (Leco Corporation) at the Institute of Earth Sciences at Heidelberg University, with a sample reproducibility of less than 0.5%. For δ13C analysis, portions of the powdered, decalcified sediment samples (1-2 mg) were examined using a Flash Elemental Analyzer 1112 (Thermo Scientific), connected to the continuous flow inlet system of a MAT 253 gas source mass spectrometer (Thermo Scientific) at the Institute of Geosciences, Goethe University Frankfurt. Carbon isotopes in graphite standard USGS24 were analyzed alongside the samples to ensure accuracy and precision. Isotope ratios are expressed in conventional delta notation: δsample (‰) = [(Rsample − Rstandard) / Rstandard - 1] × 1000, where R represents the ratio of 13C/12C of the sample and the standard Vienna Pee Dee Belemnite (VPDB). Accuracy and precision of all isotopic analyses were determined by replicate sample analysis, yielding pooled standard errors better than 0.2 ‰ for δ13CTOC.
4 samples were analysed for their relative clay mineral content. Glass smear slides were prepared and measured on a Philips X'Pert Modular Powder Diffractometer at the University of Münster, equipped with a Cu anode (1.5405 Å) and operated with the following settings: 45 kV voltage, 40 mA current, 0.02°θ step size, 1 s per measurement step, 3-50°2θ measuring range, 30 runs per sample, and no sample rotation. Note that the data obtained via this analysis is not quantitative.
The regularly spaced downhole gamma-ray log data (vertical sample rate = 0.1 m) from FB2001 located in Messel (Darmstadt) for the depth interval between 190 m to 1 m were already published in Felder and Harms (2004) and Wonik (2005). The gamma ray logging was done using a spectral gamma ray sensor (ANTARES). The normalized borehole gamma ray logging data from drill hole FB2001 was employed for astronomical tuning against the reference astronomical solution La2010d (Laskar et al., 2011, doi:10.1051/0004-6361/201116836).
A total of 556 samples (3 cm average sample spacing) were collected from the 12 m long Winsenberg section in order to reconstruct a floating timescale using cyclostratigraphic methods and to investigate paleoclimatic dynamics using selected elemental ratios. Samples were measured as a powder covered with Chemplex film on a Bruker S1 Titan 800 portable XRF at the University of Münster with the following settings: 40 kV, 20 mA, no filters, 75 s. Spectra were deconvoluted in Bruker Artrax software, and linearly calibrated using a set of 10 sedimentary standards of known composition and 11 calcite-quart mixtures. The composition of these standards is also included. Selected elemental ratios were tuned via the methods described in the accompanying manuscript, and are included in this dataset as well.
A total of 556 samples (3 cm average sample spacing) were collected from the 12 m long Winsenberg section in order to reconstruct a floating timescale using cyclostratigraphic methods and to investigate paleoclimatic dynamics using selected elemental ratios. Samples were measured as a powder covered with Chemplex film on a Bruker S1 Titan 800 portable XRF at the University of Münster with the following settings: 40 kV, 20 mA, no filters, 75 s. Spectra were deconvoluted in Bruker Artrax software, and linearly calibrated using a set of 10 sedimentary standards of known composition and 11 calcite-quart mixtures. The composition of these standards is also included. Selected elemental ratios were tuned via the methods described in the accompanying manuscript, and are included in this dataset as well.
| Organisation | Count |
|---|---|
| Wissenschaft | 17 |
| Type | Count |
|---|---|
| Daten und Messstellen | 17 |
| License | Count |
|---|---|
| Offen | 17 |
| Language | Count |
|---|---|
| Englisch | 17 |
| Resource type | Count |
|---|---|
| Archiv | 2 |
| Datei | 15 |
| Topic | Count |
|---|---|
| Boden | 14 |
| Lebewesen und Lebensräume | 13 |
| Mensch und Umwelt | 15 |
| Weitere | 17 |