Martian tension fractures and the formation of grabens and collapse features at Valles MarinerisSimple models of the Martian crust are summarized that predict extensional deformation style on the basis of depth, material friction and strength, and hydraulic conditions appropriate to the planet. These models indicate that tension fractures may be common features on Mars, given adequate differential stress conditions. Examples of tension fractures on Mars inferred from morphological criteria are examined based on the probable geologic conditions in which they formed and on model constraints. It is proposed that the grabens and collapse features of Valles Marineris are controlled by tension fractures in intact basement rocks that lie below impact ejecta.
Document ID
19890049147
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tanaka, K. L. (USGS Flagstaff, AZ, United States)
Golombek, M. P. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)