Voice phone: 612-626-1860
Fax: 612-625-3819
E-Mail: mlcd@umn.edu

Professional Society Memberships

• American Geophysical Society
• American Association for the Advancement of Science
• Geochemical Society
• American Chemical Society

• 1998 R/V Atlantis on-board Scientist for Cruise 03, Leg 22. Alvin Scientist for dive 3237
• 1999 R/V Atlantis on-board Scientist for Cruise 03-39. Alvin Scientist for dive 3468, 3470, 3474, 3478.

Research Interests
My primary research areas are experimental and theoretical geochemistry as it relates to hydrothermal systems, especially mid-ocean ridge hydrothermal systems. In general, my research presently is focused on: (1) in-situ chemical sensor development for applications in aqueous fluid at elevated T-P conditions; (2) transport properties and behaviors of aqueous species including metals and gases at high temperatures and pressures, especially supercritical conditions; (3) chemical interactions between mineral and aqueous fluid.

Selected Publications

• Ding K., Seyfried W. E. Jr., Tivey M. K., and Bradley A. M. (2001) In-situ measurement of dissolved H2 and H2S in high temperature hydrothermal vent fluids at the Main Endeavour field, Juan de Fuca Ridge. Earth and Planetery Sci. Lettlers (in press).
• Seyfried W. E. Jr., Ding K., Berndt M. E., and Chen X. (1999) Experimental and theoretical controls on the composition of mid-ocean ridge hydrothermal fluids. Reviews in Economic Geology, Vol. 8, p. 181-200.
• Ding K., Seyfried W. E. Jr. (1997) Application and stability of YSZ pH sensor in high temperature hydrothermal fluids. In Proceedings of the Fifth International Symposium on Hydrothermal Reactions. (Eds. D. A. Palmer and David J. Wesolowski), 145.
• Ding K., Seyfried W. E. Jr. (1996) Direct pH measurement of NaCl-bearing fluid with in-situ sensor at 400°C and 40 MPa: Experimental results and theoretical predictions. Science,.272, 1634-1636
• Ding K., Seyfried W. E. Jr. (1996) Gold as a hydrogen sensing electrode for in-situ measurement of dissolved H2 in supercritical fluid. J. Sol. Chem., 25, 419-431.
• Seyfried W. E. Jr., Ding K., and Bing Rao (2001) Experimental calibration of metastable plagioclase-epidote-fluid equilibria at elevated temperatures and pressures: applications to the chemistry of hydrothermal fluids at mid-ocean ridges. Geochim. Cosmochim. Acta (in press).
• Ding K., Seyfried W. E. Jr. (1995) In-situ measurement of dissolved H2 in aqueous fluid at elevated temperatures and pressures. Geochim. Cosmochim. Acta, 59, 4769-4773.
• Seyfried W. E. Jr. and Ding K. (1995) Phase equilibria in subseafloor hydrothermal systems: A review of the role of redox, temperature, pH and dissolved Cl on the chemistry of hot spring fluids at mid-ocean ridges. In Seafloor Hydrothermal Systems, Physical, Chemical, Biological, and Geological Interactions. (Eds. Susan E. Humphris, Robert A. Zierenberg, Lauren S. Mullineaux, and Richard E. Thomson). Geophysical Monograph 91, 248-271.
• Saccocia P. J., Ding K., Berndt M. E., Seewald J. S. and Seyfried W. E., Jr. (1994) Experimental and theoretical perspectives on crustal alteration at mid-ocean ridges. In: Alteration and Alteration Processes Associated with Ore-forming Systems: Geological Association of Canada, Short Course Notes  (Eds. D. R. Lentz) v.11.
• Ding K. and Seyfried W. E. Jr. (1992) Determination of Fe-Cl complexing in the low pressure supercritical region (NaCl): Fe solubility constraints on the pH of subseafloor hydrothermal fluids. Geochim. Cosmochim. Acta 59, 4769-4773.

Recent Research Support

• NSF/OCE: pH Measurement of NaCl Fluid under Near Supercritical Conditions.
• NSF/OCE: In-situ Measurement and Monitoring of Dissolved H2, H2S, and pH in Mid-ocean Ridge Hydrothermal Fluids.
• NSF/Earth: Application of in-situ chemical sensors to investigate the thermodynamic properties of neutral species (HCl° and NaOH°) in supercritical aqueous fluids.

updated March 9, 2001