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Lamont Research Professor
Lamont-Doherty Earth Observatory
131 Comer
61 Route 9W - PO Box 1000
(845) 365-8644
(845) 365-8155


Fields of interest: 

From chemical oceanography and paleoceanography, my interests have increasingly turned to interactions between the environment and human health. The theme that runs through my on-going projects is that patterns of contamination, e.g. arsenic (As) in well water of across South Asia or lead (Pb) in soil contaminated with mine tailings in the Peruvian Andes, are spatially highly variable. This complicates prediction but also creates opportunities for mitigation. My students and I promote more widespread deployment of field kits for testing water and soil, developing new kits if necessary, in order to identify and avoid exposure to toxins of children in particular. I tend to focus on the vulnerability of (and access to) uncontaminated water or soil by working with earth scientists and engineers, as well as public health and social scientists.

List of degrees from highest to lowest:
MIT/WHOI Joint Program in Oceanography
BS Oceanography (cum laude)
University of Washington
BS Chemistry (cum laude)
University of Washington

Referenced in the Following News Items:

Selected Publications:

Decoupling of As and Fe release to Bangladesh groundwater under reducing conditions. Part 1: Evidence from sediment profiles Horneman, A.; Van Geen, A.; Kent, D. V.; Mathe, P. E.; Zheng, Y.; Dhar, R. K.; O'Connell, S.; Hoque, M. A.; Aziz, Z.; Shamsudduha, M.; Seddique, A. A.; Ahmed, K. M. Geochimica Et Cosmochimica Acta Sep Volume: 68 Issue: 17 p.: 3459-3473 (2004)
On the preservation of laminated sediments along the western margin of North America van Geen, A.; Zheng, Y.; Bernhard, J. M.; Cannariato, K. G.; Carriquiry, J.; Dean, W. E.; Eakins, B. W.; Ortiz, J. D.; Pike, J. Paleoceanography Dec 18 Volume: 18 Issue: 4 p.: - (2003) Doi 10.1029/2003pa000911
A 120 yr record of widespread contamination from mining of the Iberian pyrite belt Van Geen, A.; Adkins, J. F.; Boyle, E. A.; Nelson, C. H.; Palanques, A. Geology Apr Volume: 25 Issue: 4 p.: 291-294 (1997)
Complexation of Carbonate Species at the Goethite Surface - Implications for Adsorption of Metal-Ions in Natural-Waters Van Geen, A.; Robertson, A. P.; Leckie, J. O. Geochimica Et Cosmochimica Acta May Volume: 58 Issue: 9 p.: 2073-2086 (1994)
Evidence from Cd/Ca Ratios in Foraminifera for Greater Upwelling Off California 4,000 Years Ago Van Geen, A.; Luoma, S. N.; Fuller, C. C.; Anima, R.; Clifton, H. E.; Trumbore, S. Nature Jul 2 Volume: 358 Issue: 6381 p.: 54-56 (1992)