Discovery of olivine in the Nili Fssae region of Mars |
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| Authors: | Hoefen Todd M Clark Roger N Bandfield Joshua L Smith Michael D Pearl John C Christensen Philip R |
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| Affiliation: | U.S. Geological Survey, Denver, CO 80225, USA. thoefen@usgs.gov |
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| Abstract: | We have detected a 30,000-square-kilometer area rich in olivine in the Nili Fossae region of Mars. Nili Fossae has been interpreted as a complex of grabens and fractures related to the formation of the Isidis impact basin. We propose that post-impact faulting of this area has exposed subsurface layers rich in olivine. Linear mixture analysis of Thermal Emission Spectrometer spectra shows surface exposures of 30% olivine, where the composition of the olivine ranges from Fo30 to Fo70. |
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