1. Department
of Earth and Planetary Science, University of California, 307 McCone
Hall, Berkeley, California 94720, United States
2. Department
of Environmental Science, Policy and Management, University of California, 130 Mulford Hall, Berkeley, California 94720, United States
3. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
4. Department
of Geology, University of Illinois at Urbana−Champaign, 605 East Springfield Avenue, Champaign, Illinois 61820, United States
5. Uranium Resources, Inc., 6950
South Potomac Street, Suite 300, Centennial, Colorado 80112, United States
6. Earth and
Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States