Segmented lineaments on Europa: Implications for the formation of ridge complexes and bright bands

Details Segmented lineaments on Europa: Implications for the formation of ridge complexes and bright bands Segmented lineaments on Europa: Implications for the formation of ridge complexes and bright bands

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010icar..205..528w&link_type=abstract

Icarus, Volume 205, Issue 2, p. 528-539.

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Scientific paper

We describe several segmented lineaments on Europa’s surface. These lineaments are extensive, stretching for 100s-1000s of km, and have ridge complex or bright band morphologies. The geometries of the segmented portions of these features are diagnostic of the remote normal and shear stress environment in which they formed and, therefore, constrain ridge complex and bright band formation mechanisms. Analysis of four ridge complexes indicates that they formed in a remote normal stress environment that was tensile and isotropic (or nearly so) and that these lineaments may have formed in a manner more analogous to bands on Europa than to ridges. The stress environment associated with these ridge complexes may also explain the anastomosing nature of their interior morphology. Analysis of two bright bands indicate that one formed in a remote normal stress environment that was tensile and the other was reactivated under a combination of remote tensile normal stress and remote sinistral shear stress. Aspects of the morphologies of these features also indicate that bright bands likely have complex deformation histories that can include multiple episodes of reactivation.

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