FRACTURES AND LINEAMENTS IN JEZERO CRATER (Invited Presentation)
Lineaments in general are the surface expressions of structures reflecting either brittle or ductile deformation of the host rock. At Jezero, we have mapped several distinct suites of lineaments that we interpret as brittle fractures. Fractures are important to understand because, in general, they provide conduits for fluid flow; they represent planes of mechanical weakness that can signal bulk mechanical properties of the rocks in which they form; and, on Mars, represent possible sites of astrobiological interest. Using both orbital and in-situ data, we systematically analyze the characteristics of these fractures. We focus on fracture geometry, which can provide critical information about the deformation history of a region, and relative timing, which can provide valuable relative chronological or stratigraphic information. We are particularly interested in the three-dimensional geometry of fractures expressed at the surface. The RIMFAX ground-penetrating radar instrument on the Perseverance Rover provides the opportunity to characterize the subsurface geometry of Jezero’s fractures, thereby adding a critical dimension to the analysis of these features. By documenting fracture morphologies, orientations, scale, spacing, and spatial patterns and interactions, including subsurface information wherever possible, we seek to understand the nature and sequence of deformation in Jezero crater.