The marine Os isotope record over the past 80 million years. Data sources: leachable Os from pelagic sediment core LL44-GPC3 (crosses) from Turekian & Pegram (1997), leachable Os from metalliferous sediments in the Pacific (open squares) from Peucker-Ehrenbrink et al. (1995), bulk metalliferous carbonates from DSDP Leg 92 (filled squares) from Ravizza (1993), leachable Os from DSDP Site 598 (open diamonds) from Reusch et al. (1998, in press), leachable Os from DSDP Site 521 in the Atlantic (open circles) from Reusch et al. (1998, in press), organic-rich sediments from ODP Site 959 (filled circles) from Ravizza (1998, in press), and organic-rich sediments from DSDP Site 245 (open triangle) and ODP Site 658A (filled triangles) from Ravizza (1998, in prep.)

Publications:

Ravizza, G. (1993). Variations in the ¹⁸⁷Os/¹⁸⁶Os of seawater over the past 28 milion years as inferred from metalliferous carbonates. Earth Planet. Sci. Lett, 118, 335-348.

Peucker-Ehrenbrink, B., G. Ravizza and A.W. Hofmann (1995). The marine ¹⁸⁷Os/¹⁸⁶Os record of the past 80 million years. Earth Planet. Sci. Lett, 130, 155-167.

2. Isotope Topology of the Mantle
3. Partitioning of Os between Mineral Phases in Mantle-derived Rocks
4. Reconstructing the Flux of Extraterrestrial Matter to Earth through Time
5. Anthropogenic PGE Pollution of Coastal Environments
6. Continental Weathering and Runoff of Osmium