Percival, Lawrence; van Helmond, Niels A G M; Selby, David; Goderis, Steven; Claeys, Philippe: Rhenium and Osmium analyses from ODP Leg 174AX, Bass River site, New Jersey Shelf, North Atlantic [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.920727 (dataset in review), In: Percival, L et al. (2020): Carbon isotope and Rhenium/Osmium analysis from ODP Leg 174AX, Bass River site, New Jersey Shelf, North Atlantic [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.920743
Related to:
Percival, Lawrence; van Helmond, Niels A G M; Selby, David; Goderis, Steven; Claeys, Philippe (2020): Complex interactions between large igneous province emplacement and global-temperature changes during the Cenomanian-Turonian oceanic anoxic event (OAE 2). Paleoceanography and Paleoclimatology
Further details:
Cumming, Vivien M; Poulton, Simon W; Rooney, Alan D; Selby, David (2013): Anoxia in the terrestrial environment during the late Mesoproterozoic. Geology, 41(5), 583-586, https://doi.org/10.1130/G34299.1
Selby, David; Creaser, Robert A (2003): Re-Os geochronology of organic rich sediments: an evaluation of organic matter analysis methods. Chemical Geology, 200(3-4), 225-240, https://doi.org/10.1016/S0009-2541(03)00199-2
Smoliar, Michael I; Walker, Richard J; Morgan, John W (1996): Re-Os Ages of Group IIA, IIIA, IVA, and IVB Iron Meteorites. Science, 271(5252), 1099-1102, https://doi.org/10.1126/science.271.5252.1099
Coverage:
Latitude: 39.611700 * Longitude: -74.436700
Date/Time Start: 1996-10-18T00:00:00 * Date/Time End: 1996-11-22T00:00:00
Minimum DEPTH, sediment/rock: 563.93 m * Maximum DEPTH, sediment/rock: 595.59 m
Event(s):
Bass_River_Site (BR) * Latitude: 39.611700 * Longitude: -74.436700 * Date/Time Start: 1996-10-18T00:00:00 * Date/Time End: 1996-11-22T00:00:00 * Elevation: 8.5 m * Recovery: 457.2 m * Location: North American East Coast * Campaign: Leg174AX * Method/Device: Drilling/drill rig (DRILL)
Comment:
Rhenium and osmium isotopic ratios and concentrations were determined by combining isotope dilution with negative thermal ionisation (N-TIMS) techniques using a ThermoScientific Triton at Durham University (UK). The analyses followed sample preparation utilising Carius-tube digestion of the samples with Cr(VI)O3-H2SO4, purification of osmium by established solvent extraction and microdistillation methods, and rhenium purification by single-bead anion chromatography following treatment by sodium hydroxide and acetone (Selby and Creaser, 2003; Cumming et al., 2013).
DROsS (50 pg) standard values (n=23): 187Os/188Os averaged 0.16075±0.00016 (1σ), consistent with the running average value of 0.16095±0.00053 (1σ) for the lab (n=424).
Re standard (125 pg) values (n=19): 187Re/185Re averaged 0.59820±0.00082 (1σ), consistent with the running average value of 0.59861±0.00156 (1σ) for the lab (n=512).
Four blanks were measured through the analyses carried out in this study, giving 187Os/188Os ratios averaging 0.16±0.05 (1σ), Re contents averaging 19.4±2.0 pg (1σ), and Os contents averaging 0.07±0.01 pg (1σ).
The initial 187Os/188Os (Os(i)) values for the sediments as they were deposited at 94 Ma were calculated using the following equation: 187Os/188Osinitial = 187Os/188Osmeasured - (187Re/188Osmeasured *(EXP(λ*t)-1)) where λ is the decay constant of 187Re (1.666e−11 yr−1; Smoliar et al., 1996), and t is 94.000000 yr Smoliar, M.I., Walker, R.J. and Morgan, J.W., 1996, Re-Os ages of group IIA, IIIA, IVA, and IVB iron meteorites. Science, 271, p. 1099-1102.
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
493 data points