• My primary research interests lie in the application of trace elemental and isotope geochemistry to time and track processes in Earth Surface and Deep Earth environments. We do not discriminate these applications based on temperature windows found in the Earth System. In addition to studying how elements and isotopes cycle through the Earth system, we also have projects collaboratively with faculty in other disciplines. For example with Archaeologists we are using these techniques to address important questions reconstructing societal dynamics of earlier civilizations and the interactions of earlier populations with their hosting environment. With microbiologists and ecologists we are working to understand linkages between geochemical and environmental positions and community dynamics.

    Here are several ongoing projects that fit under this large umbrella (listed along a quasi-increasing temperature gradient):

    mercury dynamics in thawing Arctic and changing temperate wetlands
    wet and dry deposition of trace metals in New England
    applications of isotopic systems and trace metals for sediment provenance
    controls on arsenic in New England groundwater drinking supplies
    geochemical cycling of calcium and magnesium in biological materials
    hydrothermal vent chemistry
    linking volatile history with magma genesis in extensional environments
    geochemical signatures in xenoliths to reconstruct past mantle dynamics
    basaltic melts as probes to the chemical structure of the mantle

    The geochemistry group uses the UNH Clean lab, a ~ 1300 ft2 (~120m2) space in James Hall outfitted with minimal exposed metal, Class 10,000 general spaces and Class 1,000 workstations. The clean lab is designed with nested rooms allowing for physical as well as air supply separation of different applications subject to contamination from other procedures.

    Our instrumentation is housed in the UNH plasma lab and includes a Nu instruments attoM high resolution single-collector inductively coupled plasma mass spectrometer and a Nu plasma II-ES multicollector inductively coupled plasma mass spectrometer. For sample introduction, the plasma geochemistry lab also includes two lasers (a 193 nm photon machines Excite excimer laser and a New Wave 213 nm deep UV laser), desolvating nebulizers and two hydride generators + cold vapor introduction systems (one typically dated for hydride generation for arsenic applications and a second typically run in cold vapor for mercury analyses). A Milestone direct mercury analysis instrument is available for mercury analysis via thermal decomposition.

    Both the UNH Clean lab and the UNH plasma lab include exhausting polypropylene laminar flow hoods, polypropylene laminar flow workstations, centrifuges, balances, ultrasonicating mixers, water polisher systems capable of achieving 18MΩ•cm DI water and Teflon-coated hot plates. Our in situ work is supported by petrographic microscopes, ‘picking’ scopes with variable zoom ranges and rock preparation facilities available through the Department of Earth Sciences.

    We are happy to welcome collaborative or contract studies into our geochemical laboratories. For additional information, discussion of applications including our approved billing rates, please contact me.


    Associate Editor, G-cubed.
    Technical Reviewer (many journals; NSF, USGS proposals) and Review Panel member (NSF)
    Geochemical Society – Clarke Committee Member (2009-2011, Chair 2011) + Technical Program Organizer (Theme member, Goldschmidt 2011; Theme leader, Goldschmidt 2013)
    UNH service- Department Chair (2012-2018, with sabbatical 2016-2017) and associated membership of the College of Engineering and Physical Sciences Executive Committee; Undergraduate Coordinator (2018 - ); Faculty Fellow in the Office of the Senior Vice Provost for Engagement and Faculty Development
  • Publications

    Academic Article

    Year Title
    2019 Mercury reallocation in thawing subarctic peatlandsGEOCHEMICAL PERSPECTIVES LETTERS.  11:33-38. 2019
    2019 SUSTAIN drilling at Surtsey volcano, Iceland, tracks hydrothermal and microbiological interactions in basalt 50 years after eruptionJOIDES Journal Scientific Drilling.  25:35-46. 2019
    2019 Elucidating the ecological networks in stone-dwelling microbiomes.Environmental Microbiology2019
    2018 Strontium isotopic composition of the Po river dissolved load: Insights into rock weathering in Northern ItalyApplied Geochemistry.  97:187-196. 2018
    2018 Authigenic carbonate formation influenced by freshwater inputs and methanogenesis in coal-bearing strata offshore Shimokita, Japan (IODP site C0020)Marine and Petroleum Geology.  96:288-303. 2018
    2018 Refertilized mantle keel below the Southern Alps domain (North-East Italy): Evidence from Marosticano refractory mantle peridotitesLithos.  300:72-85. 2018
    2017 Assessing Models of Arsenic Occurrence in Drinking Water from Bedrock Aquifers in New HampshireJournal of Contemporary Water Research and Education.  160:25-41. 2017
    2017 Magma dynamics of ancient Mt. Etna inferred from clinopyroxene isotopic and trace element systematicsGEOCHEMICAL PERSPECTIVES LETTERS.  4:47-52. 2017
    2016 Elemental and isotopic perspectives on the impact of arbuscular mycorrhizal and ectomycorrhizal fungi on mineral weathering across imposed geologic gradientsChemical Geology.  445:164-171. 2016
    2016 Isotopic and elemental evidence for Scabland Flood sediments offshore Vancouver IslandQuaternary Science Reviews.  139:129-137. 2016
    2016 Mt. Etna plumbing system revealed by combined textural, compositional, and thermobarometric studies in clinopyroxenesContributions to Mineralogy and Petrology.  171:34. 2016
    2015 Submarine and subaerial lavas in the West Antarctic Rift System: Temporal record of shifting magma source components from the lithosphere and asthenosphereGeochemistry, Geophysics, Geosystems.  16:4344-4361. 2015
    2015 Lithospheric mantle evolution in the Afro-Arabian domain: Insights from Bir Ali mantle xenoliths (Yemen)Tectonophysics.  650:3-17. 2015
    2014 Mantle dynamics and secular variations beneath the East African Rift: Insights from peridotite xenoliths (Mega, Ethiopia)Chemical Geology.  386:49-58. 2014
    2012 The East Pacific Rise Between 9 degrees N and 10 degrees N: Twenty-Five Years of Integrated, Multidisciplinary Oceanic Spreading Center StudiesOceanography.  25:18-+. 2012
    2011 Mercury deposition in Southern New Hampshire, 2006-2009Atmospheric Chemistry and Physics.  11:7657-7668. 2011
    2009 Nutrient Supply Rate and Mycorrhizal Colonization Control Patterns of Element Distribution in Ectomycorrhizal PineCommunications in Soil Science and Plant Analysis.  40:3503-3523. 2009
    2006 Tertiary Mafic Lavas of Turkana, Kenya: Constraints on East African Plume Structure and the Occurrence of High-μ Volcanism in AfricaJournal of Petrology.  47:1221-1244. 2006
    2006 Tertiary mafic lavas of Turkana, Kenya: Constraints on East African plume structure and the occurrence of high-mu volcanism in AfricaJournal of Petrology.  47:1221-1244. 2006
    2006 Heads and tails: 30 million years of the Afar plumeGeological Society Special Publication.  259:95-119. 2006
    2005 Geochemical structure of the Hawaiian plume: Sr, Nd, and Os isotopes in the 2.8 km HSDP-2 section of Mauna Kea volcanoGeochemistry, Geophysics, Geosystems.  6:n/a-n/a. 2005
    2005 Pb isotope heterogeneity between olivine-hosted melt inclusions, Eastern Snake River Plain, IdahoGeochmica et Cosmochimica Acta.  69:A98-A98. 2005
    2004 Pb isotopic heterogeneity in basaltic phenocrystsGeochmica et Cosmochimica Acta.  68:4453-4468. 2004
    2004 East African Rift System (EARS) Plume Structure: Insights from Quaternary Mafic Lavas of Turkana, KenyaJournal of Petrology.  45:1069-1088. 2004
    2004 East African Rift System (EARS) plume structure: Insights from quaternary mafic lavas of Turkana, KenyaJournal of Petrology.  45:1069-1088. 2004
    2001 Isotopic evolution of Mauna Loa and the chemical structure of the Hawaiian plumeGeochemistry, Geophysics, Geosystems.  2. 2001
    2000 Existence of complex spatial zonation in the Galápagos plumeGeology.  28:435-438. 2000
    1999 Pressure dependence of self-diffusion in the NaAlO2-SiO2 system: Compositional effects and mechanismsAmerican Mineralogist.  84:345-356. 1999
    1998 Pb-Sr-Nd isotope data from 30 and 300 Ma collision zone carbonatites in Northwest PakistanJournal of Petrology.  39:1865-1874. 1998
    1997 Dependence of self diffusivity on pressure (P) and temperature (T) in molten NaAlSi2O6: Comparison of laboratory and molecular dynamics experimentsGeophysical Research Letters.  24:711-714. 1997

    Conference Proceeding

    Year Title
    2009 Sr isotopic evidence for dissolution of anhydrite in hydrothermal fluids at 9 degrees 50'N East Pacific RiseGeochmica et Cosmochimica Acta. A856-A856. 2009
    2009 Temporal and spatial variations in hydrothermal budgets of degassing metals across a full eruptive cycle: 9 degrees 46 '-9 degrees 50 ' N East Pacific RiseGeochmica et Cosmochimica Acta. A1050-A1050. 2009
    2009 Thermobarometric implications of temporal and spatial variability in hydrothermal fluid SiO2-Cl abundances through a full eruptive cycle at 9 degrees 50'N East Pacific RiseGeochmica et Cosmochimica Acta. A1395-A1395. 2009
    2008 Hf isotopic insights into mantle source contributions in Turkana, East African Rift SystemGeochmica et Cosmochimica Acta. A566-A566. 2008
    2002 He-3 exposure dating of magnetiteGeochmica et Cosmochimica Acta. A108-A108. 2002

    Principal Investigator On

  • Identifying Significant Pathways of Hg Cycling Via Hg Isotopes in Stordalen Mire, Sweden  awarded by Geological Society of America 2019 - 2020
  • Reducing Arsenic Exposure in Drinking Water and Increasing Groundwater Sustainability by Using the Glacial Aquifer and a Novel Shallow Well Design  awarded by US DOI, US Geological Survey 2017 - 2019
  • Reducing Arsenic Exposure in Drinking Water by Tapping the Glacial Aquifer with a Novel Shallow Well  awarded by Natl Ground Water Res & Educ Foundation 2017 - 2019
  • GEO-Chem an Inquiry Approach Infusing Geochemical Systems into High School Chemistry Classrooms  awarded by Dreyfus Foundation 2011 - 2017
  • Acquisition of a Multicollector Inductively Coupled Plasma Mass Spectrometer for Earth Science Research and Research Training  awarded by National Science Foundation (NSF) 2013 - 2016
  • Participation of Lorne Loudin in IODP 351  awarded by Consortium for Ocean Leadership 2014 - 2016
  • Archiving the Karen VonDamm Legacy Hydrothermal Fluid Collection  awarded by National Science Foundation (NSF) 2009 - 2014
  • The Influence of CO2 Solubility on Trace Element Partitioning in Clinopyroxene-alkali Basalt Systems: Towards the Development of a Magmatic Carbon Meter  awarded by National Science Foundation (NSF) 2010 - 2012
  • Experimental Constraints on Contributions of Mycorrhizal Symbioses to Bedrock Weathering of Calcium and Magnesium  awarded by National Science Foundation (NSF) 2008 - 2012
  • Temporal Variations Hydrothermal Fluid Chemistry  awarded by National Science Foundation (NSF) 2004 - 2010
  • Anatomy of an Overlapping Spreading Center; Geochemical and Geological Study of the EPR9deg 03'N OSC  awarded by National Science Foundation (NSF) 2006 - 2010
  • Geochemical Structure and Dynamics of the Mantle below the East African Rift System  awarded by National Science Foundation (NSF) 2006 - 2009
  • STAR Graduate Fellowship - C. Hoff  awarded by Environmental Protection Agency (EPA) 2004 - 2009
  • Magma Genesis Beneath Continents  awarded by National Science Foundation (NSF) 2002 - 2004
  • Teaching Activities

  • Adv Rsrch Exp/Earth Sciences Taught course 2019
  • Dynamic Earth Taught course 2019
  • Geochemistry Taught course 2019
  • Geochemistry Taught course 2019
  • Rsrch Exp/Earth Sciences Taught course 2019
  • Adv Rsrch Exp/Earth Science Taught course 2019
  • Earth in Film Taught course 2019
  • Isotope Geochemistry Taught course 2019
  • Isotope Geochemistry Taught course 2019
  • Rsrch Exp/Earth Science Taught course 2019
  • Adv Rsrch Exp/Earth Sciences Taught course 2018
  • Dynamic Earth Taught course 2018
  • Volcanology Taught course 2018
  • Adv Rsrch Exp/Earth Science Taught course 2018
  • Earth in Film Taught course 2018
  • Geochemistry Taught course 2017
  • Geochemistry Taught course 2017
  • Earth in Film Taught course 2016
  • Our Solar System Taught course 2016
  • Rsrch Exp/Earth Sciences Taught course 2016
  • Geochemistry Taught course 2015
  • Geochemistry Taught course 2015
  • Earth in Film Taught course 2015
  • Earth in Film Taught course 2015
  • Isotope Geochemistry Taught course 2015
  • Isotope Geochemistry Taught course 2015
  • Our Solar System Taught course 2015
  • Rsrch Exp/Earth Science Taught course 2015
  • Rsrch Exp/Earth Sciences Taught course 2015
  • Geology and the Environment Taught course 2014
  • Rsrch Exp/Earth Science Taught course 2014
  • Top/Mass Spectrometry Taught course 2014
  • Volcanology Taught course 2014
  • Volcanology Taught course 2014
  • Geology and the Environment Taught course 2014
  • Our Solar System Taught course 2014
  • Rsrch Exp/Earth Sciences Taught course 2014
  • Education And Training

  • B.A. Environmental Sciences, University of Virginia
  • Ph.D. Geological Sciences, University of California - Santa Barbara
  • Full Name

  • Julia Bryce