1. Department of Earth and Environmental Sciences, California State University, Fresno, 2576 E. San Ramon Avenue, Fresno, California 93740, U.S.A.
2. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China
3. School of Studies in Geology and Water Resource Management, Pt. Ravishankar Shukla University, Raipur-492010, Chhattisgarh, India
4. Department of Geological Sciences, University of Florida, Box 112120, Gainesville, Florida 32611-2120, U.S.A.
5. Department of Earth Science, University of California Santa Barbara, Santa Barbara, California 93106-9630, U.S.A.
6. Planetary Environments Lab, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, U.S.A.