Age determination and stable carbon isotope ratios of Neogloboquadrina pachyderma of IODP Hole 302-M0004C ...

The Integrated Ocean Drilling Program (IODP) Arctic Coring Expedition (ACEX) Hole 4C from the Lomonosov Ridge in the central Arctic Ocean recovered a continuous 18 m record of Quaternary foraminifera yielding evidence for seasonally ice-free interglacials during the Matuyama, progressive development...

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Bibliographic Details
Main Authors: Cronin, Thomas M, Smith, Shannon A, Eynaud, Frédérique, O'Regan, Matthew, King, John W
Format: Dataset
Language:English
Published: PANGAEA 2008
Subjects:
DEPTH, sediment/rock
Sample code/label
Sample, optional label/labor no
Neogloboquadrina pachyderma dextral and/or sinistral, δ13C
Age, dated
Age, error
Calendar age
Age, minimum/young
Age, maximum/old
Age, dated material
Isotope ratio mass spectrometry
Age, 14C AMS
Age, 14C calibrated, CALIB Stuiver & Reimer, 1993
Exp302
CCGS Captain Molly Kool Vidar Viking
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP
Arctic
Arctic Ocean
Reimer
Foraminifera*
Lomonosov Ridge
Neogloboquadrina pachyderma
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.706303
https://doi.pangaea.de/10.1594/PANGAEA.706303
Description
Summary:The Integrated Ocean Drilling Program (IODP) Arctic Coring Expedition (ACEX) Hole 4C from the Lomonosov Ridge in the central Arctic Ocean recovered a continuous 18 m record of Quaternary foraminifera yielding evidence for seasonally ice-free interglacials during the Matuyama, progressive development of large glacials during the mid-Pleistocene transition (MPT) ~1.2-0.9 Ma, and the onset of high-amplitude 100-ka orbital cycles ~500 ka. Foraminiferal preservation in sediments from the Arctic is influenced by primary (sea ice, organic input, and other environmental conditions) and secondary factors (syndepositional, long-term pore water dissolution). Taking these into account, the ACEX 4C record shows distinct maxima in agglutinated foraminiferal abundance corresponding to several interglacials and deglacials between marine isotope stages (MIS) 13-37, and although less precise dating is available for older sediments, these trends appear to continue through the Matuyama. The MPT is characterized by nearly barren ...

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