File:Radioactivity of the thermal waters of Yellowstone National Park (1909) (14757272372).jpg

Identifier: radioactivityoft00schl (find matches)
Title: Radioactivity of the thermal waters of Yellowstone National Park
Year: 1909 (1900s)
Authors: Schlundt, Herman, 1869-1937 Moore, Richard B. (Richard Bishop), 1871-1931
Subjects: Geothermal resources Radioactive substances in rivers, lakes, etc Freshwater radioecology
Publisher: Washington : G.P.O.
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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basins thewaters are siliceous (some alkaline, some acid), the dissolved materialbeing derived from the rhyolite of which the park plateau is largelyformed. In both classes of deposits radium was detected. The deposits of travertine at Mammoth Hot Springs contain radiumin appreciable quantities. The activity of the residue obtained byevaporating the water is about half that of the deposits, showing thatthe radioactive material is largely deposited with the components thatcome out of solution first. This fact alone would account in a largemeasure for moderate differences in the radium content of the depositsformed by different springs of similar origin. The values obtained atMammoth Hot Springs for the radium content of the deposits from theactively flowing springs, however, are of the same order of magnitude.The radium content of these deposits averages about 8XlO-12 gramsper gram of material, a value two and one-half times greater than the a Am. Jour. Sci., vol. 20, 1905, p. 128. UPB
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OF YELLOWSTONE NATIONAL PARK. 33 radium content of the rock from which the deposits are probablyderived, and about five times the average radium content of theigneous rock of the park. To account for the concentration of radiumin these spring deposits more experimental work is necessary. Aninvestigation of the solvent action of hot, carbonated water on radium-bearing rock samples at different pressures might throw some light onthe question. Again, the fact that radium in the Mammoth HotSpring deposits is largely deposited with the components that firstcome out of solution may be connected with the numerous growths ofalgse in these hot waters, which may act as precipitating reagents. The siliceous deposits from some of the springs in the other basinsof thermal activity likewise show a higher radium content than theigneous rock of the vicinity. In some cases the content is severaltimes greater, but this result is not general. In fact, the nearly puresilica deposits from most of the geys

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