MAPPING AND INTERPRETING THE NORTHERN FAN DEPOSITS IN JEZERO CRATER, MARS
To better characterize the history and evolution of fluvio-deltaic processes within Jezero, we are constructing a photogeological map at a 1:3000 digital map scale using ArcMap and HiRISE images. Units are mapped based on morphologic characteristics, such as relative brightness, tone, and surface texture. We also incorporate "ground-truth" for mapped units using images obtained from the Perseverance rover to correlate geologic units identified through ground-based mapping with those in the Jezero landing site map (e.g., Stack et al., 2020). In addition, we use CRISM and THEMIS data to distinguish geological and/or mineralogical differences from the effects of illumination and dust cover variations. Our initial results are consistent with the westernmost part of the northern fan deposit being an extension of the western Jezero delta, although our mapped units grow more morphologically distinct and appear to have more variability towards the east. Our preliminary observations suggest that the northern fan deposits could record the interaction between the furthest reaches of the western delta and a depositional system sourced from the northern channel, rather than being isolated to only one of these two watersheds. However, more detailed study is necessary to further constrain this relationship and to continue to test this hypothesis.
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