Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary

• Main Authors: Martin, Ellen E, MacDougall, J Douglas
• Format: Other/Unknown Material
• Language: English
• Published: PANGAEA 1991
• Subjects: 39-356; 43-384; 74-528; 86-577A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg39; Leg43; Leg74; Leg86; North Atlantic/RIDGE; North Pacific Ocean; South Atlantic/PLATEAU; South Atlantic/RIDGE; North Atlantic; Planktonic foraminifera
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.712154; https://doi.org/10.1594/PANGAEA.712154

Seawater 87Sr/86Sr values increase abruptly by 28 * 10**-6 across the Cretaceous/Tertiary boundary (KTB). This small, but rapid shift is superimposed on the larger scale structure of the seawater Sr isotope curve. The time scale of radiogenic Sr addition appears to be too rapid to reconcile with sou...