Sedimentation rates and isotope data of Pyrgo murrhina from DSDP Hole 14-141

Oxygen and carbon stable isotope data of Pyrgo murrhina and flux rates of calcium carbonate in the bio- and magnetostratigraphically dated sediment sequence at DSDP Site 141 were used for a reconstruction of the deep-water circulation in the Northeast Atlantic during Late Miocene and Pliocene times....

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Bibliographic Details
Main Authors: Stein, Ruediger, Bleil, Ulrich
Format: Dataset
Language:English
Published: PANGAEA 1986
Subjects:
14-141
Deep Sea Drilling Project
DRILL
Drilling/drill rig
DSDP
Glomar Challenger
Leg14
North Atlantic/DIAPIR
Antarctic
Arctic
Antarc*
NADW
North Atlantic Deep Water
North Atlantic
Northeast Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.761089
https://doi.org/10.1594/PANGAEA.761089
Description
Summary:Oxygen and carbon stable isotope data of Pyrgo murrhina and flux rates of calcium carbonate in the bio- and magnetostratigraphically dated sediment sequence at DSDP Site 141 were used for a reconstruction of the deep-water circulation in the Northeast Atlantic during Late Miocene and Pliocene times. A distinct change towards reduced advection of deep water recorded near 5.4 Ma is contemporaneous with the cessation of the outflow of the saline Mediterranean water into the Atlantic. During the Pliocene, between 4.5 and 2.75 Ma and between 2.1 and 1.8 Ma, North Atlantic Deep Water (NADW) circulation was sluggish and Site 141 possibly influenced by Antarctic Bottom Water (AABW). Near 2.75 Ma, the advection of well-oxidized NADW was strongly intensified. This change is related to an onset of major Arctic ice growth and/or a major cooling of NADW.

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