Uranium deposits in granitic rocks

Technical Report · Sat Jan 01 04:00:00 EST 1977

DOI:https://doi.org/10.2172/7315822· OSTI ID:7315822

Nishimori, R. K.; Ragland, P. C.; Rogers, J. J.W.; Greenberg, J. K.

This report is a review of published data bearing on the geology and origin of uranium deposits in granitic, pegmatitic and migmatitic rocks with the aim of assisting in the development of predictive criteria for the search for similar deposits in the U.S. Efforts were concentrated on the so-called ''porphyry'' uranium deposits. Two types of uranium deposits are primarily considered: deposits in pegmatites and alaskites in gneiss terrains, and disseminations of uranium in high-level granites. In Chapter 1 of this report, the general data on the distribution of uranium in igneous and metamorphic rocks are reviewed. Chapter 2 contains some comments on the classification of uranium deposits associated with igneous rocks and a summary of the main features of the geology of uranium deposits in granites. General concepts of the behavior of uranium in granites during crustal evolution are reviewed in Chapter 3. Also included is a discussion of the relationship of uranium mineralization in granites to the general evolution of mobile belts, plus the influence of magmatic and post-magmatic processes on the distribution of uranium in igneous rocks and related ore deposits. Chapter 4 relates the results of experimental studies on the crystallization of granites to some of the geologic features of uranium deposits in pegmatites and alaskites in high-grade metamorphic terrains. Potential or favorable areas for igneous uranium deposits in the U.S.A. are delineated in Chapter 5. Data on the geology of specific uranium deposits in granitic rocks are contained in Appendix 1. A compilation of igneous rock formations containing greater than 10 ppM uranium is included in Appendix 2. Appendix 3 is a report on the results of a visit to the Roessing area. Appendix 4 is a report on a field excursion to eastern Canada.

• Research Organization: North Carolina Univ., Chapel Hill (USA)
• OSTI ID: 7315822
• Report Number(s): GJBX-13(77)
• Country of Publication: United States
• Language: English

Related Subjects

050200* -- Nuclear Fuels-- Exploration-- (-1987)
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
CRYSTALLIZATION
DOCUMENT TYPES
EXPLORATION
GEOLOGIC DEPOSITS
GEOLOGY
GRANITES
IGNEOUS ROCKS
METAMORPHIC ROCKS
MINERALIZATION
NORTH AMERICA
ORIGIN
PEGMATITES
PHASE TRANSFORMATIONS
RESOURCES
REVIEWS
ROCKS
URANIUM DEPOSITS
USA