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Williams, Gwyneth A; Turekian, Karl K (2004): Osmium concentrations and isotope ratios of ODP Site 146-893A. PANGAEA, https://doi.org/10.1594/PANGAEA.708132, Supplement to: Williams, GA; Turekian, KK (2004): The glacial-interglacial variation of seawater osmium isotopes as recorded in Santa Barbara Basin. Earth and Planetary Science Letters, 228(3-4), 379-389, https://doi.org/10.1016/j.epsl.2004.10.004

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Abstract:
The Pleistocene deposits of Santa Barbara Basin (SBB) show laminations during interglacial periods typical of an anoxic or suboxic depositional environment and more sporadically laminated deposits during glacial times, indicating a more oxic environment of deposition. The 187Os/188Os value of sediment leaches varies as a function of climate, consistent with a more radiogenic Os signal during interglacial times and less radiogenic Os values more typical of glacial times. The signal is confounded by contributions from a high Os detrital component with a variable 187Os/188Os value, but generally agrees with prior result from deposits from other marine environments.
Project(s):
Coverage:
Latitude: 34.287500 * Longitude: -120.036000
Date/Time Start: 1992-11-20T10:30:00 * Date/Time End: 1992-11-20T23:40:00
Minimum DEPTH, sediment/rock: 0.98 m * Maximum DEPTH, sediment/rock: 154.05 m
Event(s):
146-893A * Latitude: 34.287500 * Longitude: -120.036000 * Date/Time Start: 1992-11-20T10:30:00 * Date/Time End: 1992-11-20T23:40:00 * Elevation: -588.0 m * Penetration: 196.5 m * Recovery: 204.91 m * Location: North Pacific Ocean * Campaign: Leg146 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 21 core; 196.5 m cored; 0 m drilled; 104.3 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2AGEAgeka BPGeocode
3Sample code/labelSample labelWilliams, Gwyneth AODP sample designation
4Osmium 187/Osmium 188 ratio187Os/188OsWilliams, Gwyneth ANegative-thermal ionization mass spectrometry (N-TIMS)Bulk
5Osmium 187/Osmium 188 ratio187Os/188OsWilliams, Gwyneth ANegative-thermal ionization mass spectrometry (N-TIMS)6% Leach
6Osmium 187/Osmium 188 ratio187Os/188OsWilliams, Gwyneth ANegative-thermal ionization mass spectrometry (N-TIMS)1.5% Leach
7Osmium 187/Osmium 188 ratio187Os/188OsWilliams, Gwyneth ANegative-thermal ionization mass spectrometry (N-TIMS)0.15% Leach
8Osmium 187/Osmium 188, error187Os/188Os e±Williams, Gwyneth ABulk
9Osmium 187/Osmium 188, error187Os/188Os e±Williams, Gwyneth A6% Leach
10Osmium 187/Osmium 188, error187Os/188Os e±Williams, Gwyneth A1.5% Leach
11Osmium 187/Osmium 188, error187Os/188Os e±Williams, Gwyneth A0.15% Leach
12OsmiumOsng/kgWilliams, Gwyneth ABulk
13OsmiumOsng/kgWilliams, Gwyneth A6% Leach
14OsmiumOsng/kgWilliams, Gwyneth A1.5% Leach
15OsmiumOsng/kgWilliams, Gwyneth A0.15% Leach
Size:
78 data points

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