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Uranium in granites from the Southwestern United States: actinide parent-daughter systems, sites and mobilization. First year report

Silver, L. T. and Williams, I. S. and Woodhead, J. A. (1980) Uranium in granites from the Southwestern United States: actinide parent-daughter systems, sites and mobilization. First year report. Department of Energy (DOE), GJBX-45(81). , Pasadena, CA. https://resolver.caltech.edu/CaltechAUTHORS:20170728-143702956

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Abstract

Some of the principal findings of the study on the Lawler Peak Granite are: the granite is dated precisely by this work at 1411 ± 3 m.y., confirming its synchroneity with a great regional terrane of granites. Uranium is presently 8-10 times crustal abundance and thorium 2-3 times in this granite. Uranium is found to be enriched in at least eight, possibly ten, primary igneous mineral species over the whole-rock values. Individual mineral species show distinct levels in, and characteristics ranges of, uranium concentration. It appears that in a uraniferous granite such as this, conventional accuracy mineral suites probably cannot account for most of the uranium in the rock, and more rare, high U-concentration phases also are present and are significant uranium hosts. It appears that at least two different geological episodes have contributed to the disturbance of the U-Th-Pb isotope systems. Studies of various sites for transient dispersal of uranium, thorium, and radiogenic lead isotopes indicate a non-uniform dispersal of these components. It appears that the bulk rock has lost at least 24 percent of its original uranium endowment, accepting limited or no radiogenic lead or thorium migration from the sample.


Item Type:Report or Paper (Report)
Related URLs:
URLURL TypeDescription
https://inis.iaea.org/search/search.aspx?orig_q=RN:12609803OrganizationInternational Atomic Energy Agency
Additional Information:Prepared for the U.S. Department of Energy, Assistant Secretary for Resource Applications, Grand Junction Office, Colorado, under Contract No. DE-AC13-76GJ01664, and Bendix Field Engineering Corporation Subcontract No. 79-384-E.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC13-76GJ01664
Bendix Field Engineering Corporation79-384-E
Series Name:Department of Energy (DOE)
Issue or Number:GJBX-45(81)
Record Number:CaltechAUTHORS:20170728-143702956
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170728-143702956
Official Citation:Silver, L.T., Williams, I.S., & Woodhead, J.A. (1980). Uranium in granites from the Southwestern United States: actinide parent-daughter systems, sites and mobilization First year report (GJBX--45-81). United State
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79553
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Jul 2017 23:04
Last Modified:15 Jul 2022 15:24

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