Brooks Hall 313A and GEM Lab at CART Building 105 and 106Personal Website
GEM Lab: 989-774-1223
- Postdoctoral Researcher,
Geobiology Agouron Institute Fellow, University of California – Riverside, 2008-2011
- Ph.D., Aquatic Geochemistry, INRS-ETE, University of Quebec, 2008
- M.Sc., Chemistry and Microbiology of Water, Universities of Poitiers and Pau, 2002
- B.Sc., Chemistry, University Joseph Fourier, 2001
I favor the removal of barriers between scientific disciplines, and thus consider myself as a
biogeochemist at the crossover of chemistry, geology and biology, using
interdisciplinaryapproaches to study dynamic
aquatic systems, such as the Great Lakes.
My research area consists of identifying and characterizing reactions in aquatic ecosystems involving
trace elements (molybdenum, rhenium, uranium, tungsten, vanadium, chromium, etc…), in order to decipher processes that govern the fate and transport of these trace metals in both
ancient aquatic systems. More specifically, I explore the
biogeochemical cycling of trace metals through experimental geochemistry, analysis of diverse natural materials (water column, porewater, lacustrine and marine sediments, ancient black shales, micro-organisms), and transport-reaction modeling. My aim is to explore the
molecular processes involved in the biogeochemical cycles of trace elements.
By using these integrative approaches, I want to improve our understanding of the
paleo-environmental implications of trace-element behavior, such as their potential to illuminate how the chemistry of Earth’s surface has changed through geologic time, as well as the implications for
modern societies—including environmental chemistry and identification of anthropogenic sources.
Chappaz, A., Lyons T.W., Gregory D.D., Reinhard C.T., Gill B.C., Chao L. and Large R.R. (2014) Does pyrite act as an important host for molybdenum in modern and ancient euxinic sediments? Geochimica et Cosmochimica Acta. 126: 112-12
- Glass J.B., Chappaz A., Eustis B., Heyvaert A.C., Waetjen D. and Anbar A.D. (2013) Molybdenum geochemistry in a seasonally dysoxic Mo-limited lacustrine ecosystem. Geochimica et Cosmochimica Acta. 114: 204-219
Chappaz, A. and Curtis P.J. (2013) Integrating Empirically Dissolved Organic Matter Quality for WHAM VI using the DOM Optical Properties: A Case Study of Cu-A1-DOM Interactions. Environmental Science & Technology. 47: 20
Dahl T.W., Chappaz A.‡, Fitts J.P. and Lyons T.W. (2013) Molybdenum reduction in a sulfidic lake: Evidence from X-Ray Absorption Fine-Structure Spectroscopy. Geochimica Cosmochimica Acta. 103, 213-231. ‡Joint first authors.
Chappaz, A., Lyons T.W., Gordon G.W. and Anbar A.D. (2012) Isotopic fingerprints of anthropogenic molybdenum in lake sediments. Environmental Science & Technology. 46: 10934-10940.
Chappaz, A., Gobeil C. and Tessier A. (2010) Controls on uranium distribution in lake sediments. Geochimica Cosmochimica Acta. 74: 203-214.
A., Gobeil C. and Tessier A. (2008) Sequestration mechanisms and anthropogenic inputs of rhenium in sediments from Eastern Canada lakes. Geochimica Cosmochimica Acta. 72: 6027-6036.
A., Gobeil C. and Tessier A. (2008) Geochemical and anthropogenic enrichments of Mo in sediments from perennially oxic ans seasonally anoxic lakes in Eastern Canada. Geochimica Cosmochimica Acta. 72: 170-174.