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|Title:||Comparison between snow-imbedded and industrial black spherules|
|Authors:||National Science Foundation (U.S.)|
Smithsonian Astrophysical Observatory.
Langway, Chester C., 1929-
Marvin, Ursula B.
|Publisher:||Cold Regions Research and Engineering Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 154.|
Summary: The chemical and physical properties of black spherules collected from shallow firn and deep ice layers on the Greenland ice sheet are compared with industrial spherules (weld spatter). Morphologically, both groups of spherules closely resemble each other. Electron probe microanalyses are compared with X-ray diffraction analyses on both groups of spherules. Chemically most of the Greenland spherules are Fe rich with some Si and traces of Mn. Of the five varieties of industrial spherules examined, four contain Ni, some up to 50%; one variety contains no Ni and is chemically similar to the Greenland spherules. Density measurements show the Greenland spherules range between 4.2 and 5.9 g/cm^3 and that the industrial spherules studied range between 5.1 and 8.7 g/cm^3.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Research Report|
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|CRREL-Research-Report-154.pdf||9.12 MB||Adobe PDF|