avangeen | Lamont-Doherty Earth Observatory

Dr. Alexander Van Geen

Doherty Senior Research Scientist

Lamont-Doherty Earth Observatory

Geochemistry

131 Comer

61 Route 9W - PO Box 1000

Palisades

10964-8000

Phone:

(845) 365-8644

avangeen@ldeo.columbia.edu

View Website

Fields of interest:

Geochemistry

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

Education

List of degrees from highest to lowest:

Ph.D.

MIT/WHOI Joint Program in Oceanography

1989

BS Oceanography (cum laude)

University of Washington

1982

BS Chemistry (cum laude)

University of Washington

1982

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)