Nd and Sr isotopic compositions and isotope dilution trace element concentrations from 7 sediment cores along the southeast Greenland margin ...

The Nd and Sr isotopic compositions of Quaternary glacial and glacimarine siliciclastic sediments deposited along the margin of southeast Greenland were determined to assess the roles of the Greenland, Iceland, and more distal ice sheets in delivering detritus to this portion of the northern North A...

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Bibliographic Details
Main Authors: Verplanck, Emily P, Farmer, G Lang, Andrews, John T, Dunhill, Gita, Millo, Christian
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2009
Subjects:
Piston corer
Gravity corer
BS11/91
HUD91/45
JM96
JR20000727
ARK-XVIII/1
Bjarni Saemundsson
Hudson
Jan Mayen
James Clark Ross
Polarstern
Greenland
Kangerlussuaq
Scoresby
Scoresby Sund
Sund
Ice Sheet
Iceland
North Atlantic
Online Access:https://dx.doi.org/10.1594/pangaea.730185
https://doi.pangaea.de/10.1594/PANGAEA.730185
Description
Summary:The Nd and Sr isotopic compositions of Quaternary glacial and glacimarine siliciclastic sediments deposited along the margin of southeast Greenland were determined to assess the roles of the Greenland, Iceland, and more distal ice sheets in delivering detritus to this portion of the northern North Atlantic. The isotopic compositions of detritus generated by portions of the southern Greenland Ice Sheet were defined through measurements of till and trough mouth fan sediments. Massive diamicts from the Scoresby Sund trough mouth fan show a restricted range of e-Nd (-11.8 to -16.6) and 87Sr/86Sr (0.7192-0.7246) consistent with their derivation from mixtures of sediments derived from Paleoproterozoic and/or Caledonian basement and Tertiary Greenland basalts. Further south at Kangerlussuaq, till isotopic compositions covary with the underlying basement type, with low e-Nd values in the inner fiord (-18.1) reflecting the erosion of the local Precambrian gneisses, but with higher e-Nd values (-2.3 to 2.5) found ... : see doi:10.1594/PANGAEA.730188 for data of sediment core HU93-030-007 from Framer et al 2003, doi:10.1016/S0012-821X(03)00068-2 ...

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