sandbox analog models:
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Sandbox analog models: Sketch a cross section of the ‘mountain’ through the middle, normal to the plate boundary. Which one has higher basal coefficient of friction ?. A. B. B’. A’. Critical taper equation The relationship of the topographic slope ( α ) to - PowerPoint PPT PresentationTRANSCRIPT
Sandbox analog models: Sketch a cross section of the ‘mountain’ through the middle, normal to the plate boundary.Which one has higher basal coefficient of friction?
A
A’
B
B’
Critical taper equation
The relationship of the topographic slope (α) to the material properties (angles of internal and basal frictions)
For cohesionless material,
𝛼=𝜇𝑏
𝑁
𝑁=𝑡𝑎𝑛2( 𝜋4 + 𝜙2 )= 1+𝑠𝑖𝑛𝜙1−𝑠𝑖𝑛𝜙
(Koons, 1990)
Sandbox analog models: Construct ‘beachball ‘ diagrams showing the seismogenic instantaneous strain and fault motion.
Sandbox analog models: Construct beachball diagrams.Where beachball diagrams show the predominantly strike-slip nature?
Shear strain rate of weak base (φb = 15˚ ) model
Shear strain rate of strong base (φb = 45˚ ) model
Horizontal velocity of weak base (φb = 15˚ ) model
Vertical velocity of weak base (φb = 15˚ ) model
Horizontal velocity of strong base (φb = 45˚ ) model
Vertical velocity of strong base (φb = 45˚ ) model