Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 ...

• Main Authors: Carter, Samantha Cassie, Griffith, Elizabeth M, Penman, Donald E
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: Event label; Latitude of event; Longitude of event; Sample code/label; DEPTH, sediment/rock; AGE; Age, shift; Accumulation rate, mass; Calcium carbonate; Accumulation rate, carbonate; Barium sulfate; Accumulation rate, barite; Carbon, flux per year; Drilling/drill rig; DSDP/ODP/IODP sample designation; Exp321; Joides Resolution; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Antarc*; Antarctic; Ice Sheet; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.893203; https://doi.pangaea.de/10.1594/PANGAEA.893203

The middle Miocene climate transition (MMCT) is characterized by an abrupt 1‰ increase in benthic foraminiferal oxygen isotopes at ca. 13.8 Ma, marking expansion of the Antarctic Ice Sheet and transition of Earth's climate to a cooler, relatively stable glacial state. Also occurring during this period is a globally recognized positive carbon isotope excursion (16.9-13.5 Ma) in benthic and planktonic foraminifera with shorter carbon isotope maxima (CM) events, linking hypotheses for climate change at the time with the carbon cycle. In order to test whether export production in the eastern equatorial Pacific is related to the largest such event (CM6), coincident with Antarctic Ice Sheet expansion, a high-resolution (<5 k.y.) record of export production at Integrated Ocean Drilling Program Site U1337 spanning the MMCT (14.02-13.43 Ma) was produced using marine pelagic barite mass accumulation rates. Export production is elevated with an extended period of more than double present-day values. These variations ... : Supplement to: Carter, Samantha Cassie; Griffith, Elizabeth M; Penman, Donald E (2016): Peak intervals of equatorial Pacific export production during the middle Miocene climate transition. Geology, 44(11), 923-926 ...