000005871 001__ 5871
000005871 005__ 20221028112845.0
000005871 0247_ $$2DOI$$a10.1029/2021JE007067
000005871 037__ $$aSCART-2022-0103
000005871 100__ $$aDrilleau, Mélanie 
000005871 245__ $$aMarsquake Locations and 1-D Seismic Models for Mars From InSight Data
000005871 260__ $$c2022
000005871 520__ $$aWe present inversions for the structure of Mars using the first Martian seismic record collected by the InSight lander. We identified and used arrival times of direct, multiples, and depth phases of body waves, for 17 marsquakes to constrain the quake locations and the one-dimensional average interior structure of Mars. We found the marsquake hypocenters to be shallower than 40 km depth, most of them being located in the Cerberus Fossae graben system, which could be a source of marsquakes. Our results show a significant velocity jump between the upper and the lower part of the crust, interpreted as the transition between intrusive and extrusive rocks. The lower crust makes up a significant fraction of the crust, with seismic velocities compatible with those of mafic to ultramafic rocks. Additional constraints on the crustal thickness from previous seismic analyses, combined with modeling relying on gravity and topography measurements, yield constraints on the present-day thermochemical state of Mars and on its long-term history. Our most constrained inversion results indicate a present-day surface heat flux of 22 $\pm$1 mW/m2, a relatively hot mantle (potential temperature: 1740 $\pm$90 K) and a thick lithosphere (540 $\pm$120 km), associated with a lithospheric thermal gradient of 1.9 $\pm$0.3 K/km. These results are compatible with recent seismic studies using a reduced data set and different inversion approaches, confirming that Mars' potential mantle temperature was initially relatively cold (1780 $\pm$50 K) compared to that of its present-day state, and that its crust contains 10?12 times more heat-producing elements than the primitive mantle.
000005871 536__ $$a3PRODPLANINT/$$c3PRODPLANINT/$$f3PRODPLANINT
000005871 594__ $$aNO
000005871 700__ $$aSamuel, Henri 
000005871 700__ $$aGarcia, Raphaël F. 
000005871 700__ $$aRivoldini, Attilio 
000005871 700__ $$aPerrin, Clément 
000005871 700__ $$aMichaut, Chloé 
000005871 700__ $$aWieczorek, Mark 
000005871 700__ $$aTauzin, Benoît 
000005871 700__ $$aConnolly, James A. D. 
000005871 700__ $$aMeyer, Pauline 
000005871 700__ $$aLognonné, Philippe 
000005871 700__ $$aBanerdt, William B.
000005871 773__ $$n9$$pJournal of Geophysical Research: Planets$$v127$$y2022
000005871 8560_ $$fattilio.rivoldini@observatoire.be
000005871 8564_ $$s19312616$$uhttp://publi2-as.oma.be/record/5871/files/Drilleau2022uy58.pdf
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000005871 905__ $$apublished in
000005871 980__ $$aREFERD