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  • 2020-2024  (4)
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  • 1
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    Unknown
    δ18O and δ13C at distance-from-top of stalagmite and Oxcal deposition model interpolated ages with 95% confidence ranges (2022)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Here are presented Mulu, Borneo (4°6'N, 114°53'E) Secret Cave stalagmite SC02 d18O and d13C values over Termination 1, published in Buckingham et al. (2022). This study reports a d18O and d13C record for the portion of SC02 104.1 to 182.4 mm distance from top of stalagmite. The d18O record spans the full deglaciation, and reveals for the first time distinct d18O variations connected with the Bølling-Allerød onset and the Younger Dryas event.
    Keywords: Borneo; Calculated; Calendar age, maximum/old; Calendar age, mean; Calendar age, minimum/young; d13C; d18O; Deglaciation; DISTANCE; Growth rate; Mass spectrometer ThermoFisher Delta V; OxCal 4.4 Poisson-process deposition model feature; precipitation; rain; SC02; Speleothem sample; SPS; stalagmite; Termination I; tropics; Younger Dryas; δ13C, calcite; δ18O, calcite
    Type: Dataset
    Format: text/tab-separated-values, 612 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Mulu Borneo stalagmite SC02 U/Th dating and oxygen and carbon stable isotopes, 19.5-10.7 ky BP (2022)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: Here are presented Mulu, Borneo (4°6'N, 114°53'E) Secret Cave stalagmite SC02 d18O and d13C values over Termination 1, published in Buckingham et al. (2022). U-Th ages were calculated using the initial detrital 230Th/232Th value of 111 ± 41 ppm, which was previously calculated for SC02 based on two isochrons measured in separate stalagmites from Secret Cave in Mulu (Carolin et al., 2013). A Matlab Monte Carlo script was used to calculated the absolute age and age errors associated with each U-Th sample using the 234U and 230Th half lives presented in Cheng et al. (2013). The Poisson-process deposition model feature in OxCal(v4.4) was used to interpolate between the eighteen U/Th ages to produce an age model (Bronk Ramsey, 2008; Bronk Ramsey and Lee, 2013). This study reports a d18O and d13C record for the portion of SC02 104.1 to 182.4 mm distance from top of stalagmite. The d18O record spans the full deglaciation, and reveals for the first time distinct d18O variations connected with the Bølling-Allerød onset and the Younger Dryas event.
    Keywords: Borneo; d13C; d18O; Deglaciation; precipitation; rain; SC02; Speleothem sample; SPS; stalagmite; Termination I; tropics; Younger Dryas
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Measured SC02 U/Th isotope activity ratios, calculated ages and monte-carlo derived age error, and Oxcal deposition model U-Th ages and associated age error (2022)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: U-Th ages were calculated using the initial detrital 230Th/232Th value of 111 ± 41 ppm, which was previously calculated for SC02 based on two isochrons measured in separate stalagmites from Secret Cave in Mulu (Carolin et al., 2013). A Matlab Monte Carlo script was used to calculated the absolute age and age errors associated with each U-Th sample using the 234U and 230Th half lives presented in Cheng et al. (2013). The Poisson-process deposition model feature in OxCal(v4.4) was used to interpolate between the eighteen U/Th ages to produce an age model (Bronk Ramsey, 2008; Bronk Ramsey and Lee, 2013).
    Keywords: Age, dated; Borneo; Calculated, using the corrected age; Calendar age; Calendar age, error to older; Calendar age, error to younger; Calendar age, maximum/old; Calendar age, mean; Calendar age, minimum/young; Corrected; Deglaciation; DISTANCE; Measured; Monte Carlo method; OxCal 4.4 Poisson-process deposition model feature; precipitation; rain; Sample ID; SC02; Speleothem sample; SPS; stalagmite; Termination I; Thorium-230/Thorium-232 ratio (0); Thorium-230/Uranium-238 activity ratio; Thorium-230/Uranium-238 activity ratio, error; Thorium-232; Thorium-232/Thorium-230 ratio; Thorium-232/Uranium-238 activity ratio; Thorium-232/Uranium-238 activity ratio, error; tropics; Uncorrected; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, error; Uranium-234/Uranium-238 activity ratio (0); Uranium-234/Uranium-238 activity ratio (0), negative error; Uranium-234/Uranium-238 activity ratio (0), positive error; Uranium-238; Year of analysis; Younger Dryas
    Type: Dataset
    Format: text/tab-separated-values, 450 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment (2021)
    Elsevier
    Details
    Publication Date: 2024-02-07
    Description: Highlights • Inherent & added tracers were tested for CO2 leakage attribution & quantification. • Additionally, CO2 leakage was quantified directly by the inverted funnel-technique. • All tracers except 18O were capable of attributing the CO2 source. • In total, ∼43 % of total injected CO2 leaked across the seabed. To inform cost-effective monitoring of offshore geological storage of carbon dioxide (CO2), a unique field experiment, designed to simulate leakage of CO2 from a sub-seafloor storage reservoir, was carried out in the central North Sea. A total of 675 kg of CO2 were released into the shallow sediments (∼3 m below seafloor) for 11 days at flow rates between 6 and 143 kg d-1. A set of natural, inherent tracers (13C, 18O) of injected CO2 and added, non-toxic tracer gases (octafluoropropane, sulfur hexafluoride, krypton, methane) were used to test their applicability for CO2 leakage attribution and quantification in the marine environment. All tracers except 18O were capable of attributing the CO2 source. Tracer analyses indicate that CO2 dissolution in sediment pore waters ranged from 35 % at the lowest injection rate to 41% at the highest injection rate. Direct measurements of gas released from the sediment into the water column suggest that 22 % to 48 % of the injected CO2 exited the seafloor at, respectively, the lowest and the highest injection rate. The remainder of injected CO2 accumulated in gas pockets in the sediment. The methodologies can be used to rapidly confirm the source of leaking CO2 once seabed samples are retrieved.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: archive
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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