HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Mechanical origin of power law scaling in fault zone rock

Abstract : [1] A nearest neighbor fragmentation model, previously developed to explain observations of power law particle distributions in 3D with mass dimension D 3 % 2.6 (D 2 % 2.6 in 2D section) in low-strain fault gouge and breccia, is extended to the case of large strains to explain recent observations of D 3 % 3.0 (D 2 % 2.0 in 2D section) in the highly strained cores of many exhumed fault zones. At low strains, the elimination of same-sized nearest neighbors has been shown to produce a power law distribution which is characterized by a mass dimension near D 3 % 2.6. With increasing shear strain these isolated same-size neighbors can collide, in which case one of them fractures. The probability of two same size neighbors colliding and fragmenting in a simple shear flow is a function of the size and density of the two particles. Only for a power law distribution with D 3 = 3.0 is this collision probability independent of the size of the particles. Citation: Sammis,
Document type :
Journal articles
Complete list of metadata

Cited literature [18 references]  Display  Hide  Download

Contributor : Eva Fareau Connect in order to contact the contributor
Submitted on : Friday, February 5, 2016 - 5:40:30 PM
Last modification on : Tuesday, November 16, 2021 - 4:56:19 AM
Long-term archiving on: : Saturday, November 12, 2016 - 11:57:35 AM


Publisher files allowed on an open archive



Charles G. Sammis, Geoffrey C. P. King. Mechanical origin of power law scaling in fault zone rock. Geophysical Research Letters, American Geophysical Union, 2007, ⟨10.1029/2006GL028548⟩. ⟨insu-01270165⟩



Record views


Files downloads