The history of strike-slip formation on Europa as inferred from the shell tectonics model

摘要: The formation of strike-slip faults on Europa has been linked to tidal stresses, which change in magnitude and direction due Europa’s orbital eccentricity [2]. We have developed a linear elastic model that describes the response fault such time-varying shear normal stresses [5]. This mechanical model, called shell tectonics, predicts net slip rate offset accumulation along preexisting faults. Using includes small amount obliquity, tectonics correctly directions 75% observed from comprehensive survey by [6]. Further statistical analysis shows approximately half were likely formed recently at their present locations. remaining either migrated longitude (perhaps non-synchronous rotation icy shell), are old had enough time accumulate significant offsets despite being “slow-slippers”, or process other than stress. apply additional tests examine likelihood each these scenarios construct history Europa.