Stable carbon and oxygen isotope rates of Maastrichtian ODP samples from Shatsky Rise, supplement to: Frank, Tracy D; Thomas, Deborah J; Leckie, R Mark; Arthur, Michael A; Bown, Paul R; Jones, Kelly; Lees, Jackie A (2005): The Maastrichtian record from Shatsky Rise (northwest Pacific): A tropical perspective on global ecological and oceanographic changes. Paleoceanography, 20(1), PA1008

• Main Authors: Frank, Tracy D, Thomas, Deborah J, Leckie, R Mark, Arthur, Michael A, Bown, Paul R, Jones, Kelly, Lees, Jackie A
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2005
• Subjects: Event label; Sample code/label; DEPTH, sediment/rock; Depth, composite; δ13C, bulk carbonate; δ18O, bulk carbonate; δ13C, carbonate; δ18O, carbonate; Planoglobulina multicamerata, δ13C; Planoglobulina multicamerata, δ18O; Globotruncanita stuartiformis, δ13C; Globotruncanita stuartiformis, δ18O; Globigerinelloides prairiehillensis, δ13C; Globigerinelloides prairiehillensis, δ18O; Nuttallides truempyi, δ13C; Nuttallides truempyi, δ18O; Rugoglobigerina rugosa, δ13C; Rugoglobigerina rugosa, δ18O; Gavelinella beccariiformis, δ13C; Gavelinella beccariiformis, δ18O; Inoceramus spp. δ13C; Inoceramus spp., δ18O; Gavelinella sp., δ13C; Gavelinella sp., δ18O; Globotruncana arca, δ13C; Globotruncana arca, δ18O; ε-Neodymium; Drilling/drill rig; Composite Core; DSDP/ODP/IODP sample designation; Mass spectrometer Finnigan MAT 252; Leg198; Joides Resolution; Ocean Drilling Program ODP; Southern Ocean; Pacific; Rugosa; Leckie
• Online Access: https://dx.doi.org/10.1594/pangaea.837668; https://doi.pangaea.de/10.1594/PANGAEA.837668

We present new isotopic and micropaleontological data from a depth transect on Shatsky Rise that record the response of the tropical Pacific to global biotic and oceanographic shifts during the mid-Maastrichtian. Results reveal a coupling between the upper ocean, characterized by a weak thermocline and low to intermediate productivity, and intermediate waters. During the earliest Maastrichtian, oxygen and neodymium isotope data suggest a significant contribution of relatively warm intermediate water from the North Pacific. Isotopic shifts through the early Maastrichtian suggest that this warmer water mass was gradually replaced by cooler waters originating in the Southern Ocean. Although the cooler water mass remained dominant through the remainder of the Maastrichtian, it was displaced intermittently at shallow intermediate depths by North Pacific intermediate water. The globally recognized "mid-Maastrichtian event" ~69 Ma, manifested by the brief appearance of abundant inoceramid bivalves over shallow portions of Shatsky Rise, is characterized by an abrupt increase (~2°-3°C) in sea surface temperatures, a greater flux of organic matter out of the surface ocean, and warmer (~4°C) intermediate waters. Results implicate simultaneous changes in surface waters and the sources/distribution patterns of intermediate water masses as an underlying cause for widespread biotic and oceanographic changes during mid-Maastrichtian time.