1. Department of Geology and Geological Engineering, Colorado School of Mines, 1516 Illinois Street, Golden, Colorado 80401
2. Institute of Theoretical Physics, TU Bergakademie Freiberg, Leipziger Straβe 23, 09596 Freiberg, Germany
3. FLUID INC., 1401 Wewatta St. #PH3, Denver, Colorado 80202
4. U.S. Geological Survey, MS 973, Denver Federal Center, Denver, Colorado 80225