(Table 1) Cd/Ca and Mn/Ca ratios of benthic foraminifera from DSDP Hole 30-289, supplement to: Delaney, Margaret Lois; Boyle, Edwards A (1987): Cd/Ca in late Miocene benthic foraminifera and changes in the global organic carbon budget. Nature, 330(6144), 156-159

• Main Authors: Delaney, Margaret Lois, Boyle, Edwards A
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1987
• Subjects: Sample code/label; DEPTH, sediment/rock; Epoch; AGE; Species; Cadmium/Calcium ratio; Manganese/Calcium ratio; Comment; Drilling/drill rig; DSDP/ODP/IODP sample designation; Leg30; Glomar Challenger; Deep Sea Drilling Project DSDP; Pacific; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.770015; https://doi.pangaea.de/10.1594/PANGAEA.770015

The late Miocene carbon shift (~6.2 Myr) -a 0.5-1.0 per mil, d13C decrease in benthic and planktonic foraminifera- has been ascribed to changes in global inventory, deep-ocean circulation, and/or productivity. Cadmium, d13C, and nutrients in the ocean are linked; comparison of d13C and Cd/Ca yields circulation and chemical inventory information not available from either alone. We determined Cd/Ca ratios in late Miocene benthic foraminifera from DSDP Site 289. Results include: (1) late Miocene Pacific Cd/Ca values fall between those of late Quaternary Atlantic and Pacific benthic foraminifera; (2) there are no systematic Cd/Ca offsets between Cibicidoides kullenbergi, Cibicidoides wuellerstorfi and Uvigerina spp.; and (3) there is a very slight Cd/Ca change coincident with d13C. Cd/Ca, slightly higher in younger, isotopically lighter samples, exhibits a smaller increase than predicted if circulation were the primary cause of the carbon shift. The carbon shift may have been due to a long-term shift in the steady-state carbon isotope input or to a change in the sedimentation of organic carbon relative to calcium carbonate.