rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: The
    title: transition from cataclasis to intracrystalline plasticity in experimental shear zones
  name:
    name part: Chester, Frederick Michael
    name part: 1957-
    role:
      role term: creator
  name:
    name part: Carter, N. L.
    role:
      role term: degree committee member.
  name:
    name part: Fletcher, R. C.
    role:
      role term: degree committee member.
  name:
    name part: Handin, J. W.
    role:
      role term: degree committee member.
  name:
    name part: Johnson, B.
    role:
      role term: degree committee member.
  name:
    name part: Logan, J. M.
    role:
      role term: degree supervisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1988
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: x, 139 leaves : illustrations ; 29 cm
  abstract: The change with depth in the Earth's crust from cataclastic faulting to dislocation-dominated (intracrystalline-plastic) ductile flow is correlative with many geological and geophysical phenomena. An analogous transition is achieved in polycrystalline halite layers sheared at conditions of constant normal-stresses between 10 and 90 MPa, temperatures between 22 and 250 °C and shear-strain rates between 3(10^-1) and 3(10^-5) s^-1. From conditions of low temperatures, low normal stresses and high strain rates to conditions of high temperatures, high normal stresses and low strain rates the following transitions occur: frictional to pressure-insensitive flow, unstable to stable shearing, rate-weakening to rate-strengthening behavior, localized faulting to homogeneous flow, and cataclastic to crystal-plastic deformation mechanisms. These transitions do not necessarily coincide. The long-term shear strength of halite is described with a constitutive model that assumes at least three independent flow mechanisms are operative. The mechanisms are non-frictional (pressure-insensitive) intracrystalline-plastic flow by dislocation motion, frictional semi-brittle flow by the combined action of brittle and plastic mechanisms and frictional cataclastic faulting by dominantly brittle mechanisms. The constitutive model predicts the following mechanical and physical characteristics of faulting in the crust: 1) Maximum shear strength occurs at the transition from frictional to pressure-insensitive flow, which is a function of pressure and temperature gradients, and strain rate. 2) An abrupt change in the shear-strength gradient occurs in the frictional regime at the transition from cataclastic faulting to semi-brittle flow. This occurs at depths that are approximately one-third to two-thirds that of the maximum shear strength and approximately coincides with the transition from rate-weakening to rate-strengthening behavior. 3) If rate-weakening is a necessary condition for slip instab…
  note: "Major subject: Geophysics."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1988
  note: Includes bibliographical references (leaves 131-138).
  subject:
    topic: Faults (Geology)
  subject:
    topic: Geodynamics
  subject:
    topic: Rock deformation
  subject:
    topic: Major geophysics
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-771512
  identifier: http://gateway.proquest.com/openurl
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-771512
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 890413
    record change date: 20220104090357.0
    record identifier: in00000766725
    language of cataloging:
      language term: eng