NORDSTROM, D. Kirk, U.S. Geological Survey, Boulder labs, 3215 Marine St, Boulder, CO 80303, dkn@usgs.gov, dkn@usgs.gov

SEAL II, Robert R.¹, PIATAK, Nadine M.¹, LEVITAN, Denise M.² and HAMMARSTROM, Jane M.³, (1)U.S. Geological Survey, 954 National Center, 12201 Sunrise Valley Drive, Reston, VA 20192, (2)Dept. of Geosciences, Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24061, (3)U.S. Geological Survey, 954 National Center, Reston, VA 20192, rseal@usgs.gov, rseal@usgs.gov

VERPLANCK, Philip L., U.S. Geological Survey, P.O. Box 25046, Mail Stop 973, Denver, CO 80225-0046, GOLDFARB, Richard J., United States Geological Survey, Box 25046, MS 973, Denver, CO 80225, MUELLER, Seth H., Schlumberger Water Services, Avda. Pdte Kennedy 5757, Piso 9, Santiago, Chile, NORDSTROM, D. Kirk, U.S. Geol Survey, 3215 Marine Street, Suite E-127, Boulder, CO 80303 and YOUCHA, Emily K., Water and Environmental Research Center, University of Alaska Fairbanks, PO Box 755960, Fairbanks, AK 99775, plv@usgs.gov, plv@usgs.gov

DESISTO, Stephanie L.¹, JAMIESON, Heather E.¹ and PARSONS, Michael B.², (1)Geological Sciences and Geological Engineering, Queen's University, Kingston, ON K7L 3N6, Canada, (2)Natural Resources Canada, Geological Survey of Canada (Atlantic), P.O. Box 1006, Dartmouth, NS B2Y 4A2, Canada, desisto@geoladm.geol.queensu.ca, desisto@geoladm.geol.queensu.ca

FOSTER, Andrea L., U.S. Geological Survey, 345 Middlefield Rd., MS 901, Menlo Park, CA 94025, ASHLEY, Roger P., US Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, ONA-NGUEMA, Georges, Institut de Minéralogie et de Physique des milieux condensés, University of Paris, Case 115, 4 Place Jussieu, Paris, 75252, France, RYTUBA, James J., US Geological Survey, 345 Middlefield Road, MS901, Menlo Park, CA 94025 and BROWN Jr, Gordon E., Geological and Environmental Sciences, Stanford University, Stanford, CA 94305-2115, afoster@usgs.gov, afoster@usgs.gov

KAVALENCH, Jennifer and JAMIESON, Heather E., Geological Sciences and Geological Engineering, Queen's University, Kingston, ON K7L 3N6, Canada, kavalench@geoladm.geol.queensu.ca, kavalench@geoladm.geol.queensu.ca

DESBARATS, Alexander J.¹, PARSONS, Michael B.², PERCIVAL, Jeanne B.¹, BEAUCHEMIN, Suzanne³ and KWONG, Y.T. John³, (1)Geological Survey of Canada, 601 Booth Street, Ottawa, ON K1A0E8, Canada, (2)Geological Survey of Canada (Atlantic), PO Box 1006, Dartmouth, NS B2Y4A2, Canada, (3)CANMET Mining and Mineral Sciences Laboratory, 555 Booth Street, Ottawa, ON K1A0G1, Canada, Alexandre.Desbarats@nrcan-rncan.gc.ca, Alexandre.Desbarats@nrcan-rncan.gc.ca

BEAUCHEMIN, Suzanne¹, KWONG, Y.T. John¹, DESBARATS, Alexander J.², PARSONS, Michael B.³ and PERCIVAL, Jeanne B.², (1)CANMET Mining and Mineral Sciences Laboratory, 555 Booth Street, Ottawa, ON K1A0G1, Canada, (2)Geological Survey of Canada, 601 Booth Street, Ottawa, ON K1A0E8, Canada, (3)Geological Survey of Canada (Atlantic), PO Box 1006, Dartmouth, NS B2Y4A2, Canada, John.Kwong@NRCan-RNCan.gc.ca, John.Kwong@NRCan-RNCan.gc.ca

KWONG, Y.T. John¹, ROACH, Patrick², ARRELL, Steve³, GUILBEAULT, Martin³, MILLER, John³ and SOPROVICH, Eric³, (1)CANMET Mining and Mineral Sciences Laboratory, 555 Booth Street, Ottawa, ON K1A0G1, Canada, (2)Indian and Northern Affairs Canada, 300 Main Street, Whitehorse, YT Y1A 2B5, Canada, (3)Environment Canada, 91782 Alaska Highway, Whitehorse, YT Y1A 5B7, Canada, John.Kwong@NRCan-RNCan.gc.ca, John.Kwong@NRCan-RNCan.gc.ca

LOGSDON, Mark J. and LOGSDON, Lucy P., Geochimica, Inc, 9045 Soquel Drive Ste 2, Aptos, CA 95003, mark.logsdon@sbcglobal.net, mark.logsdon@sbcglobal.net

CONDON, Peter D.¹, LINDSAY, Matthew B.J.¹, BLOWES, David W.² and PTACEK, Carol J.², (1)Earth and Environmental Sciences, University of Waterloo, 200 University Ave. W, Waterloo, ON N2L 3G1, Canada, (2)Earth and Environmental Sciences, University of Waterloo, Waterloo, ON N2L 3G1, Canada, condonpete@gmail.com, condonpete@gmail.com

PETERSON, Holly E.¹, BECKIE, Roger D.², BLACKMORE, Sharon R.¹, HIRSCHE, D. Trevor¹, KLEIN, Bernhard³, MAYER, K. Ulrich⁴, SINGURINDY, Olga¹ and SMITH, Leslie¹, (1)Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada, (2)Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada, (3)Mining Engineering, University of British Columbia, 6350 Stores Road, Vancouver, BC V6T 1Z4, Canada, (4)Earth and Ocean Sciences, University of British Columbia, 6339 Stores Rd, Vancouver, BC V6T 1Z4, Canada, hpeterso@eos.ubc.ca, hpeterso@eos.ubc.ca

HAUPT, Charlene D., Norman B Keevil Institute of Mining Engineering, University of British Columbia, 517 - 6350 Stores Road, Vancouver, BC V6T 1Z4, Canada and KLEIN, Bernhard, Mining Engineering, University of British Columbia, 6350 Stores Road, Vancouver, BC V6T 1Z4, Canada, cdhaupt@hotmail.com, cdhaupt@hotmail.com