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

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...

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Bibliographic Details
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
Description
Summary: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 ...

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