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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: 

Geochemical cycling of trace elements in natural and perturbed environments, particularly redox-sensitive processes affecting metals and metalloids. Applications to mine tailings, coastal sediment, estuaries, and groundwater, as well reconstructions of past climate change in nearshore environments. More recent interest in the bridging of disciplines, including the health and social sciences, to address multi-faceted environmental problems.

Some of my projects include:

  • Reconstruction of climate change along the west of coast of the Americas
  • Geochemistry of cadmium and iron in coastal upwelling systems
  • Mitigation of groundwater arsenic problem in Bangladesh


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)