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Detailed Reference Information |
Schulson, E.M. (2002). On the origin of a wedge crack within the icy crust of Europa. Journal of Geophysical Research 107: doi: 10.1029/2001JE001586. issn: 0148-0227. |
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We suggest that a crack that developed into a wedge-shaped band within the icy crust of Europa (at ~28¿S, 170¿W Schenk and McKinnon, 1989, Figure 4; Prockter et al., 1999, Figure 1>) originated under an applied compressive stress through the operation of a frictional sliding mechanism. We analyze this suggestion using a scale-independent, sliding crack model and obtain an estimate of the maximum compressive stress to initiate the crack that compares reasonably well with earlier estimates <Helfenstein and Parmentier, 1985; McEwen, 1986; Greenberg et al., 1998> of Europan crustal stresses that are based upon elastic deformation of a shell. We then show through an application of both power law dislocation creep and diffusion creep that colder, near-surface Europan ice appears to be capable of supporting the deduced stresses with little relaxation over a period from 104 to 105 years. |
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Abstract |
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Keywords
Mineral Physics, Creep and deformation, Physical Properties of Rocks, Fracture and flow, Planetology, Comets and Small Bodies, Ice, Planetology, Solar System Objects, Jovian satellites |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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