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  • OceanRep  (2)
  • 1980-1984  (2)
Document type
Source
Publisher
Years
Year
  • 1
    facet.materialart.
    Unknown
    Microstructure and Fabric Transitions in Calcite Tectonites from the Sierra Alhamilla (1983)
    Springer
    In:  Geologische Rundschau, 72 (2). pp. 605-618.
    Details
    Publication Date: 2018-01-17
    Description: A suite of marble specimens from the Sierra Alhamilla (Spain), deformed to large strains under natural conditions at about 300° C shows distinct variations in microstructure and fabrics. It can be demonstrated that the development of crystallographic preferred orientations and grain shape fabrics are strongly dependent on recrystallized grain size. This is interpreted to reflect the relative importance of various deformational mechanisms. Superplasticity seems to have a sharp upper grain size limit at 10–15 /smm. Within the power law creep regime, deformation in fine grained aggregates is probably dominated by diffusional, in coarser ones by dislocation mechanisms. The transition is a gradual one, and may span a grain size range of 30 /sm.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF01822084
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
    facet.materialart.
    Unknown
    A study of white mica microstructure and microchemistry in a low grade mylonite (1984)
    Pergamon Press / Elsevier
    In:  Journal of Structural Geology, 6 (3). pp. 283-292.
    Details
    Publication Date: 2018-01-17
    Description: A suite of mylonites rich in white mica, taken from the Betic Movement Zone (Sierra Alhamilla, Spain) shows progressive grain refinement involving a two-stage recrystallization history. Stage one is isochemical and possibly works by nucleation and growth of new crystals at sites of fracture and dilatancy. Stage two is nonisochemical and may be driven by differences in strain energy and chemical free energy between the two phases. Deformation is probably governed by brittle fracture and diffusional mass transfer along grain boundaries and cracks. The two stages of recrystallization are thought to represent a single progressive episode of deformation under changing metamorphic conditions.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/0191-8141(84)90052-X
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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