Uranium and thorium in rocks of the Soviet Northeast
Journal Article
·
· Int. Geol. Rev.; (United States)
Radioactivity of noncontemporaneous magmatic, metamorphic, and ore formations was determined over a wide area of the Soviet Northeast from 1500 analyses of uranium and 800 analyses of thorium (x-ray spectral and luminescence analyses). Leucocratic and alaskitic potassium granites of the culminating phases of late Mesozoic granitoid assemblages have heightened radioactivity and these granites are close to highly radioactive granites of the trace-metal type as defined by L.V. Komlev and A.A. Smyslov. Detailed characteristics of the salient petrologic and petrologic-chemical features of granitoid assemblages differing in the nature of radioactivity are given, as are data on uranium and thorium concentrations in the principal rock-forming minerals.
- OSTI ID:
- 6566799
- Journal Information:
- Int. Geol. Rev.; (United States), Journal Name: Int. Geol. Rev.; (United States) Vol. 20:10; ISSN IGREA
- Country of Publication:
- United States
- Language:
- English
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