Sandbox Tectonics10

Sandbox Tectonics10 - [comp positive ] Figure .4 10 Figure...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
12.005 Lecture Notes 10 A house built upon sand… Figure 10.1 Figure by MIT OCW. “Theory” Sand follows Amonton’s Law: τ = µσ n (Mohr – Coulomb) Modify for pore fluid: = p f n Need to express τ and σ n on any arbitrary plane develop stress tensor (symmetric) T = n ˆ ± ± ± or T i = ij n j Mohr circle construction Figure 10.2 Figure by MIT OCW. ˆ n Tn = ±
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Application to accretionary wedge Figure .3 10 Figure by MIT OCW. Assume On verge of failure everywhere µ , λ * b , b Trigonometry relates α , β , , b , … Pore Fluid p f ρ w gD = σ w gD zz Often: ; g (1 ) z cos( ) zz Sandbox tectonics Rheology – “Brittle failure” – friction dominates
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: [comp positive ] Figure .4 10 Figure by MIT OCW. Applications: A) Figure 10.5 Figure by MIT OCW. Figure 10.6 Figure by MIT OCW. B) Figure 10.7 Figure by MIT OCW. Figure .8 10 Figure by MIT OCW. Consider stress only only variable for brittle failure neglect strain, velocity, inertia, Possible paradoxes: Type A) int = strong steep repose Type B) strong flat Viscous fluid, type A&B weak falt Complicating factors: Pore pressure; based decollement...
View Full Document

This note was uploaded on 10/25/2010 for the course MIT Geodynamic taught by Professor Ywn during the Fall '10 term at MIT.

Page1 / 4

Sandbox Tectonics10 - [comp positive ] Figure .4 10 Figure...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online