2026-10-15T11:01:38Z https://oai.datacite.org/oai

doi:10.1594/pangaea.708132 2025-09-02T01:10:17Z PANGAEA PANGAEA.REPOSITORY

Osmium concentrations and isotope ratios of ODP Site 146-893A Williams, Gwyneth A Turekian, Karl K PANGAEA 2004 Issued: 2004 doi:10.1016/j.epsl.2004.10.004 DEPTH, sediment/rock AGE Sample code/label Osmium-187/Osmium-188 ratio Osmium-187/Osmium-188 ratio, error Osmium Drilling/drill rig DSDP/ODP/IODP sample designation Negative-thermal ionization mass spectrometry (N-TIMS) Leg146 Joides Resolution Ocean Drilling Program (ODP) 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. Supplement to: Williams, Gwyneth A; Turekian, Karl K (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 en Dataset Supplementary Dataset text/tab-separated-values Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode