Global investigation of olivine on Mars: Insights into crust and mantle compositions

摘要: [1] We present the distribution of olivine on Mars, derived from spectral parameters based 1 µm absorption band. The can be defined with respect to two end-members: type corresponds low iron content and/or small grain size abundance, and 2, which higher larger abundance. spatial statistical analysis global points out five major geological settings where is detected: (1) Early Hesperian olivine-bearing smooth crater floors flat intercrater plains throughout southern highlands; (2) deposits around three main basins Argyre, Hellas, Isidis; (3) in dunes, ejecta, or extended northern plains; (4) associated outcrops sand floor Valles Marineris; (5) butte vicinity Hellas. context, age, composition detections these are detailed. Their origin implication their occurrence Martian mantle crust, as well evolution Mars volcanism discussed.