Research Interests

Water-rock interactions and metamorphism; Geochemical cycling at mid-ocean ridges and subduction zones;
Alteration and evolution of oceanic crust;  Formation of hydrothermal deposits.

Publications

     Complete CV

    Selected Recent Publications:

• Alt, J. C., 2003 Stable isotopic composition of upper oceanic crust formed at a fast spreading ridge, ODP Site 801, Geochem. Geophys. Geosyst., 4(5), 8908, doi:10.1029/2002GC000400.
• Alt, J.C., and W. Bach, 2003. Alteration of Oceanic Crust: Subsurface Rock-Water Interactions, in: Energy and mass transfer in marine hydrothermal systems, P.E. Halbach, V. Tunnicliffe, and J.R. Hein, eds., Dahlem University Press, 7-27.
• Alt, J.C. and W.C. Shanks, 2003. Serpentinization of abyssal peridotites from the MARK area, Mid-Atlantic Ridge: Sulfur geochemistry and reaction modeling, Geochim. Cosmochim. Acta, 67: 641-653.
• Alt, J.C., Davidson, G.J., Teagle, D.A.H., and Karson, J.A., 2003. The Isotopic Composition of Gypsum in the Macquarie Island Ophiolite: Implications for the Sulfur Cycle and the Subsurface Biosphere in Oceanic Crust, Geology, 31: 549-552;
• Teagle, D.A.H., M.J. Bickle, J.C. Alt, 2003.  Recharge flux to ocean-ridge black smoker systems: a geochemical estimate from ODP Hole 504B Earth Planet. Sci. Lett. 210, 81-89
• Chan, Lui-Heung, J.C. Alt, and D.A.H. Teagle, 2002. Lithium and lithium isotope profiles through the upper oceanic crust:A study of seawater basalt exchange at ODP Sites 504b and 896A. Earth Planet. Sci. Lett., 201, 187-201.
• Blake, R.E., Alt, J.C. and Martini, A.M., 2001. Oxygen isotope ratios of PO4: An inorganic indicator of enzymatic activity and P metabolism and a new biomarker in the search for life.  Proc. Nat. Acad. Sci. 98: 2148-2153.
• Alt, J.C. and P. Mata, 2000. On the role of microbes in the alteration of submarine basaltic glass: A TEM Study. Earth Planet. Sci. Lett.,  181, 301-313.
• Alt, J.C. and D.A.H. Teagle., 2000. Hydrothermal alteration and fluid fluxes in ophiolites and oceanic crust, in: Dilek, Y., E. Moores, and D. Elthon and A. Nicolas, eds., Ophiolites and Oceanic Crust: New Insights from Field Studies and the Ocean Drilling Program, Geol. Soc. Am. Spec. Paper 349, 273-282.

GS 205 Dynamic Planet
 
 
 

Other Stuff

    Alex