Liebetrau, Volker; Krause, Stefan (2014): U-Th isotope systematics and light stable isotope data of carbonate enriched sediments at MASOX and HyBIS sites (methane seepage off Svalbard) from JAGO dives during cruise Maria S. Merian MSM21/4 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.825734, In supplement to: Berndt, Christian; Feseker, Tomas; Treude, Tina; Krastel, Sebastian; Liebetrau, Volker; Niemann, Helge; Bertics, Victoria J; Dumke, Ines; Dünnbier, Karolin; Ferre, Benedicte; Graves, Carolyn; Gross, Felix; Hissmann, Karen; Hühnerbach, Veit; Krause, Stefan; Lieser, Kathrin; Schauer, Jürgen; Steinle, Lea (2014): Temporal constraints on hydrate-controlled methane seepage off Svalbard. Published Online January 2 2014, Science, https://doi.org/10.1126/science.1246298
Always quote citation above when using data! You can download the citation in several formats below.
Coverage:
Median Latitude: 78.584373 * Median Longitude: 9.447790 * South-bound Latitude: 78.555830 * West-bound Longitude: 9.420830 * North-bound Latitude: 78.612830 * East-bound Longitude: 9.473500
Date/Time Start: 2012-08-23T18:41:00 * Date/Time End: 2012-08-25T13:15:59
Minimum DEPTH, sediment/rock: 0.05 m * Maximum DEPTH, sediment/rock: 0.05 m
Event(s):
MSM21/4_579-1 * Latitude Start: 78.555830 * Longitude Start: 9.473500 * Latitude End: 78.557000 * Longitude End: 9.471000 * Date/Time Start: 2012-08-23T18:41:00 * Date/Time End: 2012-08-23T22:02:59 * Location: North Greenland Sea * Campaign: MSM21/4 * Basis: Maria S. Merian * Method/Device: Submersible JAGO (JAGO)
MSM21/4_597-1 * Latitude Start: 78.611830 * Longitude Start: 9.425830 * Latitude End: 78.612830 * Longitude End: 9.420830 * Date/Time Start: 2012-08-25T08:13:00 * Date/Time End: 2012-08-25T13:15:59 * Elevation Start: -380.5 m * Elevation End: -396.5 m * Location: North Greenland Sea * Campaign: MSM21/4 * Basis: Maria S. Merian * Method/Device: Submersible JAGO (JAGO)
Comment:
Values with # mark highly unreliable ages characterized by uncertainties larger than the deduced age or even dominated by 230Th correction values as well as isochron approaches based just on 2-point reference lines. Therefore, the latter may not provide any proof for the petrographic postulation of cogenetic origin.
Uncertainties presented on 2 sigma level.
HyBIS U-measurements were performed on Quadrupole Inductively Coupled Plasma Mass Spectrometer (Q-ICP-MS) on limited precision level.
Note 1: The sample weight represents the analysed amount dissolved in 4 N Acetic Acid and 2.25 N HNO3 (marked by -2), respectively, at room temperature over 2 hours. Remaining material was 2 x centrifuged, dried down and weighed for recalculation of the dissolved sample weight.
Note 2: The equivalent percentage of the analysed non-silicate fraction represented by the sample weight. X-ray diffraction analyses indicated aragonite as the main non-silicate and easily dissolvable phase.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 5 | Depth, top/min | Depth top | m | Krause, Stefan | ||
| 6 | Depth, bottom/max | Depth bot | m | Krause, Stefan | ||
| 7 | Sample code/label | Sample label | Krause, Stefan | leachate mode in brackets | ||
| 8 | Location | Location | Krause, Stefan | |||
| 9 | Description | Description | Krause, Stefan | |||
| 10 | Sample mass | Samp m | mg | Liebetrau, Volker | s. note 1 | |
| 11 | non-silicates, total | non silic tot | % | Liebetrau, Volker | s. note 2 | |
| 12 | Age, dated | Age dated | ka | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 13 | Age, error | Age e | ± | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 14 | Uranium-238 | 238U | mg/kg | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 15 | Error, absolute | Error a | ± | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 16 | Thorium-232 | 232Th | mg/kg | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 17 | Error, absolute | Error a | ± | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 18 | Uranium-234/Uranium-238 activity ratio | (234U/238U) | Liebetrau, Volker | MC-ICP-MS, isotope dilution | delta234U(o) (meas. 234U/238U act. ratio -1) * 1000 at time 0 (today) | |
| 19 | Uranium-234/Uranium-238 activity ratio, error, absolute | (234U/238U) e | ± | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 20 | Thorium-230/Thorium-232 activity ratio | (230Th/232Th) | Liebetrau, Volker | MC-ICP-MS, isotope dilution | ||
| 21 | Error, absolute | Error a | ± | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 22 | Uranium-238/Thorium-232 activity ratio | (238U/232Th) | Liebetrau, Volker | MC-ICP-MS, isotope dilution | ||
| 23 | Error, absolute | Error a | ± | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 24 | Thorium-230/Uranium-234 activity ratio | (230Th/234U) | Liebetrau, Volker | MC-ICP-MS, isotope dilution | 230Th/234U activity ratio corrected for inherited 230Th by application of 230Th/232Th activity ratio of 0.75 ± 0.2 as continental crust average value (according to Wedepohl, 1995) | |
| 25 | Error, absolute | Error a | ± | Liebetrau, Volker | MC-ICP-MS, isotope dilution | |
| 26 | Uranium-234/Uranium-238 activity ratio | (234U/238U) | Liebetrau, Volker | Calculated | delta234U(t)(234U/238U act. ratio at zero age -1) * 1000 at time (t = U/Th-age) Measured 234U/238U back-calculated for 234U decay since carbonate precipitation, based on the individual U/Th ingrowth age and half-lives measured by Cheng et al. (2000). | |
| 27 | Uranium-234/Uranium-238 activity ratio, error, absolute | (234U/238U) e | ± | Liebetrau, Volker | Calculated | |
| 28 | δ13C, carbonate | δ13C carb | ‰ PDB | Liebetrau, Volker | Mass spectrometer, Finnigan, MAT 253 | with respect to VPDB |
| 29 | Error, absolute | Error a | ± | Liebetrau, Volker | Mass spectrometer, Finnigan, MAT 253 | |
| 30 | δ18O, carbonate | δ18O carb | ‰ PDB | Liebetrau, Volker | Mass spectrometer, Finnigan, MAT 253 | with respect to VPDB |
| 31 | Error, absolute | Error a | ± | Liebetrau, Volker | Mass spectrometer, Finnigan, MAT 253 | |
| 32 | Carbonates | Carb | Krause, Stefan | X-ray diffractometry (Philips PW1710) | ||
| 33 | Sample code/label | Sample label | Liebetrau, Volker | For sub-samples postulated of cogenetic origin by petrographic observations the isoplot 3.75 software of the Berkeley Geochronology Center, CA, USA is applyied for isochron age estimates. | ||
| 34 | Uranium-234/Uranium-238 activity ratio | (234U/238U) | Liebetrau, Volker | Calculated | delta234U(t)(234U/238U act. ratio at zero age -1) * 1000 at time (t = U/Th-age) Measured 234U/238U back-calculated for 234U decay since carbonate precipitation, based on the individual U/Th ingrowth age and half-lives measured by Cheng et al. (2000). delta234U(t) of Rosholt-1 isochron approaches based on isoplot 3.75 calculation. | |
| 35 | Uranium-234/Uranium-238 activity ratio, error, absolute | (234U/238U) e | ± | Liebetrau, Volker | Calculated | |
| 36 | Age model | Age model | ka | Liebetrau, Volker | Age estimates applying the Rosholt-1 isochron approach in 3 dimensional projection according data reduction system after Ludwig (2008). | |
| 37 | Age, error | Age e | ± | Liebetrau, Volker | ||
| 38 | Age model | Age model | ka | Liebetrau, Volker | Age estimates applying the Osmond isochron approach according data reduction system after Ludwig (2008). | |
| 39 | Age, error | Age e | ± | Liebetrau, Volker |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
119 data points