Uranium Content of the Lavas of Lassen Volcanic National Park, California; Abstract
Adams JA and Saunders DF. 1953. Uranium Content of the Lavas of Lassen Volcanic National Park, California; Abstract. Pages 1389. In Abstracts of Papers Submitted for the November Meeting. Toronto, Canada. November 9-11
Nineteen samples of volcanic rocks from Lassen Volcanic National Park have been analyzed for U, Na, K, and Ca. In addition, the alpha activities were measured with scintillometers. U and K correlate positively, indicating that both tend to be enriched as differentiation proceeds toward more siliceous lavas. In the samples studied the U is enriched about fourfold, while the K is enriched about threefold. The correlations with Ca, Na, and total K + Na are less well defined than the K correlation. The correlation between K and alpha particle activity under standard conditions is rather well defined. The correlation between alpha particle activity and U is not well defined when all samples are included. However, the samples that are furthest from the main trend may be considered special cases—e. g., mud flows and rocks that were probably partially weathered and thus leached of part of their U. The main trend in the U content vs. alpha particle activity indicates that the Th/U ratio did not shift significantly during the differentiation of the Lassen lavas.
- Type
- Conference Proceeding Paper
- Authors
- Adams, John; Saunders, Donald
- Units
- LAVO
- Keywords
- Lassen, lava, rocks, Uranium, volcanic