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← GeographyWhich process dictates whether stick-slip or stable sliding friction dominates the energy release along a tectonic fault line?
A)Concentration of dissolved silica acting as lubricant
B)Presence of surface water reduces lithostatic pressure
C)Increase in confining pressure prevents crack propagation
D)Mineral composition determines frictional strength✓
💡 Explanation
When mineral composition varies along the fault, differing frictional strengths emerge because these alter the material's resistance to shear stress affecting slip behavior, creating heterogeneous stress accumulation. Therefore mineral composition dictates friction type, rather than lubrication, pore pressure, or preventing propagation, which influence magnitude but not the fundamental dynamics of the event.
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