Trace element analyses of spheres from the melt zone of the Greenland ice cap using synchrotron x ray fluorescence
Synchrotron 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 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 complmementary and consequently the two iron spheres examined in this study are unlikely to result from the ejection of globules of Fe/Ni from parent chondritic micrometeoroids. 8 figs., 2 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA); Chicago Univ., IL (USA). Dept. of Geophysical Sciences; Institut du Radium, 75 - Paris (France); Centre National de la Recherche Scientifique, 91 - Gif-sur-Yvette (France). Centre des Faibles Radioactivites; Paris-11 Univ., 91 - Orsay (France). Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5546108
- Report Number(s):
- BNL-40745; CONF-860375-4; ON: TI88005608
- Resource Relation:
- Conference: Lunar and planetary science conference, Houston, TX, USA, 17 Mar 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
IRON METEORITES
MULTI-ELEMENT ANALYSIS
X-RAY FLUORESCENCE ANALYSIS
COPPER
GALLIUM
GERMANIUM
GREENLAND
ICE CAPS
LEAD
MICROSTRUCTURE
NICKEL
SCANNING ELECTRON MICROSCOPY
SELENIUM
TRACE AMOUNTS
X-RAY SPECTRA
ZINC
CHEMICAL ANALYSIS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
ELEMENTS
ICE
METALS
METEORITES
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
SEMIMETALS
SPECTRA
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS
640101* - Astrophysics & Cosmology- Cosmic Radiation