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Trace element analyses of spheres from the melt zone of the Greenland ice cap using synchrotron X ray fluorescenceSynchrotron X-ray fluorescence spectra of unpolished iron and chondritic spheres extracted from sediments collected on the melt zone of the Greenland ice cap allow the analysis of Ni, Cu, Zn, Ga, Ge, Pb, and Se with minimum detection limits on the order of several parts per million. All detected elements are depleted relative to chondritic abundance with the exception of Pb, which shows enrichments up to a factor of 500. An apparent anticorrelation between the Ni-content and trace element concentration was observed in both types of spherules. The fractionation patterns of the iron and chondritic spheres are not complementary and consequently the two iron spheres examined in this study are unlikely to result from ejection of globules of Fe/Ni from parent chondritic micrometeoroids.
Document ID
19870046809
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chevallier, P.
(Paris XI Univ. Orsay, France)
Wang, J.
(Paris XI, Universite Orsay, France)
Jehanno, C.
(CNRS Centre des Faibles Radioactivites, Gif-sur-Yvette, France)
Maurette, M.
(CNRS Laboratoire Rene Bernas, Orsay, France)
Sutton, S. R.
(Brookhaven National Laboratory Upton, NY, United States)
Date Acquired
August 13, 2013
Publication Date
March 30, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 92
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
87A34083
Funding Number(s)
CONTRACT_GRANT: NAG9-106
CONTRACT_GRANT: DE-AC02-76CH-00016
CONTRACT_GRANT: NSF EAR-83-13682
Distribution Limits
Public
Copyright
Other

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