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On the manganese content of cosmic flakes from deep-sea sedimentsCosmic flakes belong to the category of cosmic microparticles. They occur together with cosmic spherules in sediments. These flakes appear to represent ablation products of iron meteorites burnt away during the passage of a meteorite through the atmosphere by friction against air molecules. Microprobe analyses of flakes from deep sea deposits proved the particles to consist of magnetite which in most cases had been altered into maghemite in the outer zones. This is in agreement with the assumption that they represent fragments of fusion crust of iron meteorites. Most of the flakes, however, contained a small percentage of manganese. This element is not a common constituent of iron meteorites. An attempt is made to explain the presence of manganese in flakes and its absence in cosmic spherules.
Document ID
19740011354
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Utech, K.
(Gesellschaft fuer Weltraumforschung m.b.H. Bad Godesberg, Germany)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Publication Information
Publication: NASA, Washington Evolutionary and Phys. Properties of Meteoroids
Subject Category
Space Sciences
Accession Number
74N19467
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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