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Jeffrey Martin Heikoop

Jeff Heikoop

Phone (505) 667-8128


My research expertise includes 1) the use of nitrogen, carbon, oxygen, deuterium, sulfur, chromium and uranium isotopes as geochemical tracers of pollution and in interrogating biogeochemical cycles; 2) contaminant dynamics in complex surface and subsurface environments; 3) reconstructing paleoclimate records from the lake sediments, bogs, corals and tree rings utilizing light stable isotopes, trace elements and other proxies.  Recent special interests include a) paleoclimate records in lacustrine sediments, b) applying geochemical techniques to tracing contaminants such as nitrate, chromate, uranium and perchlorate, and c) the use of isotopes in optimizing algal biofuels production, d) isotopic measurements of global change, particularly in Arctic environments and e) environmentally sound in-situ recovery mining of uranium.


Ph.D. Geology - McMaster University, Hamilton, Ontario, Canada, Jan. 1997.


LANL Positions

Oct. 2010 – Present. Team Leader Geology, Geochemistry and Geomaterials Research Team

August, 2006 – Sept 2009. LANL Technical Staff Member; Project Leader for Site Scale Modeling and Characterization in LANL Water Stewardship Program.

May 2001 – August, 2006. LANL Technical Staff Member.

Sept. 1998 – May 2001. Postdoctoral Fellow, Geology and Geochemistry Group, Earth and Environmental Sciences Division, Los Alamos National Laboratory.  Projects: Stable Isotope and Trace Element Environmental Signals in Calcareous Organisms. Isotopic Signatures of Wastewater Uptake in Wetland Plants.


Professional Societies

American Geophysical Union



[Klaus, JS * Budd, AF * Heikoop, JM * Fouke, BW], "Environmental controls on corallite morphology in the reef coral Montastraea annularis", BULLETIN OF MARINE SCIENCE, Vol.80, iss.1, p.233-260, JAN 2007.

[Schleyer, MH * Heikoop, JM * Risk, MJ], "A benthic survey of Aliwal Shoal and assessment of the effects of a wood pulp effluent on the reef", MARINE POLLUTION BULLETIN, Vol.52, iss.5, p.503-514, MAY 2006.

[Klaus, JS * Janse, I * Heikoop, JM * Sanford, RA * Fouke, BW], "Coral microbial communities, zooxanthellae and mucus along gradients of seawater depth and coastal pollution", ENVIRONMENTAL MICROBIOLOGY, Vol.9, iss.5, p.1291-1305, MAY 2007.

[Larson, TE * Heikoop, JM * Perkins, G * Chipera, SJ * Hess, MA], "Pretreatment technique for siderite removal for organic carbon isotope and C : N ratio analysis in geological samples", RAPID COMMUNICATIONS IN MASS SPECTROMETRY, Vol.22, iss.6, p.865-872, 2008.

[Anderson, RS * Jass, RB * Toney, JL * Allen, CD * Cisneros-Dozal, LM * Hess, M * Heikoop, J * Fessenden, J], "Development of the mixed conifer forest in northern New Mexico and its relationship to Holocene environmental change", QUATERNARY RESEARCH, Vol.69, iss.2, p.263-275, MAR 2008.


[Fair, JM * Heikoop, JA], "Stable isotope dynamics of nitrogen sewage effluent uptake in a semi-arid wetland", ENVIRONMENTAL POLLUTION, Vol.140, iss.3, p.500-505, APR 2006.

[Sturchio, NC * Caffee, M * Beloso, AD * Heraty, LJ * Bohlke, JK * Hatzinger, PB * Jackson, WA * Gu, BH * Heikoop, JM * Dale, M], "Chlorine-36 as a Tracer of Perchlorate Origin", ENVIRONMENTAL SCIENCE & TECHNOLOGY, Vol.43, iss.18, p.6934-6938, SEP 15 2009.

[Dai, ZX * Keating, E * Gable, C * Levitt, D * Heikoop, J * Simmons, A], "Stepwise inversion of a groundwater flow model with multi-scale observation data", HYDROGEOLOGY JOURNAL, Vol.18, iss.3, p.607-624, MAY 2010.

[Cisneros-Dozal, LM * Heikoop, JM * Fessenden, J * Anderson, RS * Meyers, PA * Allen, CD * Hess, M * Larson, T * Perkins, G * Rearick, M], "A 15 000-year record of climate change in northern New Mexico, USA, inferred from isotopic and elemental contents of bog sediments", JOURNAL OF QUATERNARY SCIENCE, Vol.25, iss.6, p.1001-1007, SEP 2010.

[Fawcett, PJ * Werne, JP * Anderson, RS * Heikoop, JM * Brown, ET * Berke, MA * Smith, SJ * Goff, F * Donohoo-Hurley, L * Cisneros-Dozal, LM * Schouten, S * Damste, JSS * Huang, YS * Toney, J * Fessenden, J * WoldeGabriel, G * Atudorei, V * Geissman, JW * Allen, CD], "Extended megadroughts in the southwestern United States during Pleistocene interglacials", NATURE, Vol.470, iss.7335, p.518-521, FEB 24 2011.

[Fair, Jeanne M. * Ryder, Thomas B. * Loiselle, Bette A. * Blake, John G. * Larson, Toti E. * Davis, Paul * Syme, James * Perkins, George B. * Heikoop, Jeffrey M.], "Estimates of dietary overlap for six species of Amazonian manakin birds using stable isotopes", ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES, Vol.49, iss.3, p.420-435, AUG 20 2013.

[Heikoop, Jeffrey M. * Johnson, Thomas M. * Birdsell, Kay H. * Longmire, Patrick * Hickmott, Donald D. * Jacobs, Elaine P. * Broxton, David E. * Katzman, Danny * Vesselinov, Velimir V. * Ding, Mei * Vaniman, David T. * Reneau, Steven L. * Goering, Tim J. * Glessner, Justin * Basu, Anirban], "Isotopic evidence for reduction of anthropogenic hexavalent chromium in Los Alamos National Laboratory groundwater", Chemical Geology, Vol.373, p.1-9, 2014.

[WoldeGabriel, G. * Boukhalfa, H. * Ware, S.D. * Cheshire, M. * Reimus, P. * Heikoop, J. * Conradson, S.D. * Batuk, O. * Havrilla, G. * House, B. * Simmons, A. * Clay, J. * Basu, A. * Christensen, J.N. * Brown, S.T. * DePaolo, D.J.], "Characterization of cores from an in-situ recovery mined uranium deposit in Wyoming: Implications for post-mining restoration", Chemical Geology, Vol.390, p.32-45, 2014.

[Cisneros-Dozal, Luz M. * Huang, Yongsong * Heikoop, Jeffrey M. * Fawcett, Peter J. * Fessenden, Julianna * Anderson, R. Scott * Meyers, Philip A. * Larson, Toti * Perkins, George * Toney, Jaime * Werne, Josef P. * Goff, Fraser * WoldeGabriel, Giday * Allen, Craig D. * Berke, Melissa A.], "Assessing the strength of the monsoon during the late Pleistocene in southwestern United States", QUATERNARY SCIENCE REVIEWS, Vol.103, p.81-90, NOV 1 2014.

[Newman, B. D. * Throckmorton, H. M. * Graham, D. E. * Gu, B. * Hubbard, S. S. * Liang, L. * Wu, Y. * Heikoop, J. M. * Herndon, E. M. * Phelps, T. J. * Wilson, C. J. * Wullschleger, S. D.], "Microtopographic and depth controls on active layer chemistry in Arctic polygonal ground", GEOPHYSICAL RESEARCH LETTERS, Vol.42, iss.6, p.1808-1817, MAR 28 2015.

[Basu, Anirban * Brown, Shaun T. * Christensen, John N. * DePaolo, Donald J. * Reimus, Paul W. * Heikoop, Jeffrey M. * Wodegabriel, Giday * Simmons, Ardyth M. * House, Brian M. * Hartmann, Matt * Maher, Kate], "Isotopic and Geochemical Tracers for U(VI) Reduction and U Mobility at an in Situ Recovery U Mine", ENVIRONMENTAL SCIENCE & TECHNOLOGY, Vol.49, iss.10, p.5939-5947, MAY 19 2015.

[Davis, Paul * Syme, James * Heikoop, Jeffrey * Fessenden-Rahn, Julianna * Perkins, George * Newman, Brent * Chrystal, Abbey E. * Hagerty, Shannon B.], "Quantifying uncertainty in stable isotope mixing models", JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, Vol.120, iss.5, p.903-923, MAY 2015.

[Heikoop, Jeffrey M. * Throckmorton, Heather M. * Newman, Brent D. * Perkins, George B. * Iversen, Colleen M. * Chowdhury, Taniya Roy * Romanovsky, Vladimir * Graham, David E. * Norby, Richard J. * Wilson, Cathy J. * Wullschleger, Stan D.], "Isotopic identification of soil and permafrost nitrate sources in an Arctic tundra ecosystem", JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, Vol.120, iss.6, p.1000-1017, JUN 2015.