Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic
Measurements of the Nd-143/Nd-144 ratio, expressed as epsilon-Nd(0), made in sea water samples obtained at depths from 0 to 4850 m at stations 95, 101, and 30 of North-Atlantic cruise 109-1 of the RV Atlantis II are reported and analyzed. In the 1000-m sample at station 95, determined by salinity, O...
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1983
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ftnasantrs:oai:casi.ntrs.nasa.gov:19830062255 2023-05-15T17:27:11+02:00 Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic Piepgras, D. J. Wasserburg, G. J. Unclassified, Unlimited, Publicly available Jul 20, 1983 http://ntrs.nasa.gov/search.jsp?R=19830062255 unknown http://ntrs.nasa.gov/search.jsp?R=19830062255 Accession ID: 83A43473 Copyright Other Sources 46 Journal of Geophysical Research; 88; July 20 1983 ftnasantrs 2012-02-15T15:32:09Z Measurements of the Nd-143/Nd-144 ratio, expressed as epsilon-Nd(0), made in sea water samples obtained at depths from 0 to 4850 m at stations 95, 101, and 30 of North-Atlantic cruise 109-1 of the RV Atlantis II are reported and analyzed. In the 1000-m sample at station 95, determined by salinity, O2, PO4, NO3, SiO2, potential-temperature, and pressure profiles to correspond to the core of the Mediterranean outflow, an epsilon-Nd(0) value of -9.8 + or - 0.6 was found, a significant increase over the layers above and below, where epsilon-Nd(0) is about -12. Mixing estimations give a value for pure Mediterranean waters of approximately -6; continental drainage or volcanic deep-sea sediments are considered possible sources for this more radiogenic Nd. The epsilon-Nd(0) peak in the western North Atlantic (station 30) is found at the surface, and the deep waters are less radiogenic than in the eastern North Atlantic, suggesting multiple Nd sources. Possible origins and distribution mechanisms are discussed. Other/Unknown Material North Atlantic NASA Technical Reports Server (NTRS) |
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46 Piepgras, D. J. Wasserburg, G. J. Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic |
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46 |
description |
Measurements of the Nd-143/Nd-144 ratio, expressed as epsilon-Nd(0), made in sea water samples obtained at depths from 0 to 4850 m at stations 95, 101, and 30 of North-Atlantic cruise 109-1 of the RV Atlantis II are reported and analyzed. In the 1000-m sample at station 95, determined by salinity, O2, PO4, NO3, SiO2, potential-temperature, and pressure profiles to correspond to the core of the Mediterranean outflow, an epsilon-Nd(0) value of -9.8 + or - 0.6 was found, a significant increase over the layers above and below, where epsilon-Nd(0) is about -12. Mixing estimations give a value for pure Mediterranean waters of approximately -6; continental drainage or volcanic deep-sea sediments are considered possible sources for this more radiogenic Nd. The epsilon-Nd(0) peak in the western North Atlantic (station 30) is found at the surface, and the deep waters are less radiogenic than in the eastern North Atlantic, suggesting multiple Nd sources. Possible origins and distribution mechanisms are discussed. |
format |
Other/Unknown Material |
author |
Piepgras, D. J. Wasserburg, G. J. |
author_facet |
Piepgras, D. J. Wasserburg, G. J. |
author_sort |
Piepgras, D. J. |
title |
Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic |
title_short |
Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic |
title_full |
Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic |
title_fullStr |
Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic |
title_full_unstemmed |
Influence of the Mediterranean outflow on the isotopic composition of neodymium in waters of the North Atlantic |
title_sort |
influence of the mediterranean outflow on the isotopic composition of neodymium in waters of the north atlantic |
publishDate |
1983 |
url |
http://ntrs.nasa.gov/search.jsp?R=19830062255 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19830062255 Accession ID: 83A43473 |
op_rights |
Copyright |
_version_ |
1766119142182617088 |