1. THE CHEMISTRY OF MARS Heather Tennant Earth 438 Presented March 11, 2014

2. Motivation Bulk Chemical Composition Formation and evolution of the planet Initial concentrations of surface components Surface Chemistry Geologic processes throughout history Aqueous Alteration Differentiation Geochemical cycling Biological implications

3. Bulk Composition Methods of estimation: Geochemical/cosmochemical models Meteorites, chondrites Isotopic Meteorites, chondrites Geophysical Bulk density, moment of inertia, Love number, radius Need for seismic data and heat flow data

4. Bulk Composition

5. Surface Chemistry Methods of measurement: Orbital/Remote Sensing Reflectance spectroscopy Gamma Ray Spectroscopy Neutron Spectroscopy In situ measurements Spectroscopy Imaging Meteorites

6. Geochemical Mapping (Odessey GRS) 5 Geochemical Provinces

7. Carbonation and Chlorination (CHRISM)

8. Sulfur Cycling

9. Petrochemistry of Jake_M (MAHLI,APXS) E. M. Stolper et al., Science 21 February 2014

10. Chemical Analysis of Rocknest (APXS)

11. 2012 Meteorite - Tissint H. Chennaoui Aoudjehane Science 9 November 2012

12. Future Directions Seismometers Raman Spectroscopy (MarsExo 2018) Sample Return