Concentration of radioactive elements in deep crustal material
Concentration of radioactive elements in deep crustal material
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DOI：
10.1016/0016-7037(65)90078-5
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发表时间：
1965
影响因子：
5
通讯作者：
K. Heier;Janet A. Adams
中科院分区：
文献类型：
--
作者：
K. Heier;Janet A. Adams
Th, U and K have been determinedin paragneisses of different metamorphic grade. Both Th and U concentrations are lower in granulite facies rocks than in more low-grade metamorphic rocks of equivalent nature. Thus geological processes operating in the crust must result in an upward concentration of these elements. The Th U ratio of the paragneisses shows a wide variation which is related to the oxidation of U. Some evidence exists for a decrease of the Th U ratios with metamorphic grade.
