Bayesian inversion of the Martian structure using geodynamic constraints

SUMMARY The ongoing InSight mission has recently deployed very broad band seismometers to record the Martian seismic activity. These recordings constitute first data set collected at surface of Mars. This unique but sparse compels for development new techniques tailored make best use specific context single station-multiple events with several possible ranges uncertainties on event location. To this end, we conducted sets Markov chain Monte Carlo inversions 1-D structure We compared two inversion that differ from nature parametrization which they rely. A classical approach based a profile using Bézier curves. second, less conventional relies in terms quantities influence thermochemical evolution planet (mantle rheology, initial thermal state and composition), accounts 4.5 Gyr planetary evolution. considered combinations true model parameters retrieve, explored type (body waves or without waves), number their associated epicentral distances uncertainties, presence potential constraints Moho depth inferred independent measurements/considerations (receiver functions gravity data). show due its inherent tighter coupled allows considerably better retrieval underneath it than inversion, under condition physical assumptions made are valid In addition, our tests indicate order constrain Mars data, following conditions must be met: (1) triggered by an internal source distance. (2) just few well-localized impact sources, least one located close distance (<5°) illuminate independently crust mantle. addition providing structure, geodynamically constrained allow reconstruct rheological history until present. Therefore, even relatively small amount large absence waves, constraining present-day long-term red remains through hybrid schemes.