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Greg Druschel 321 Delehanty Hall Gregory.Druschel@uvm

GEO 135 Introduction to Geochemistry. Greg Druschel 321 Delehanty Hall Gregory.Druschel@uvm.edu. Course Goals. At the end of this course… You will be able to utilize thermodynamic to determine if individual reactions are feasible/important under any given condition

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Greg Druschel 321 Delehanty Hall Gregory.Druschel@uvm

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  1. GEO 135Introduction to Geochemistry Greg Druschel 321 Delehanty Hall Gregory.Druschel@uvm.edu

  2. Course Goals At the end of this course… • You will be able to utilize thermodynamic to determine if individual reactions are feasible/important under any given condition • You will be able to design a sampling protocol, analyze key chemical components, apply thermodynamic or kinetic models, and test hypotheses concerning the mobility of elements in any setting • You will be able to appreciate both the dynamics and complexity of geochemistry yet utilize what you know to ascertain processes important in the stability, movement, and reactivity of elements in the earth

  3. What is Geochemistry?? • Victor Goldschmidt defined the study of geochemistry as: “the laws governing the distribution of the chemical elements and their isotopes throughout the earth” • What does that mean? • We are interested in understanding the different ways in which elements move  whether in the core, mantle, crust, oceans, sediments, air, space, or other planets…

  4. b Light  photochemical rxns, phototrophic organisms?? O2 diffusion FeS2 + 3.5 O2 + H2O  Fe2+ + 2 SO42- + 2 H+ Bacteria/ archea  Fe oxidizers, S oxidizers Fe2++ O2 + H+ Fe3+OOH + 2 H+ H+ + SO42- < -- > HSO4- CH2O + FeOOH  Fe2+ + CO2 CH2O + SO42- HS- + CO2

  5. Field Geochemistry • Scale – Where and when do you take a sample??

  6. Field Notebook • Need to record all observations, measurements, and sampling locations/times • Get something weatherproof (Write-in-the rain notebooks work great)

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