1. Department
of Earth and Planetary Science University of California, Berkeley, California 94709, United States
2. Energy
Geosciences Division, E.O. Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
3. Earth
and Environmental Sciences Division, Los Alamos National Laboratory, Los
Alamos, New Mexico 87454, United States
4. Department
of Geological Sciences, Stanford University, Stanford, California 94305, United States
5. Power Resources Inc., Smith Ranch-Highland Operation, 762 Ross Road, Douglas, Wyoming 82633, United States