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Flow laws in polymineralic aggregates deformed by a combination of diffusion creep and dislocation creep

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Abstract

Microstructures in naturally deformed rocks in the upper crust demonstrate that creep strain in nature may be accommodated by a combination of dislocation creep, diffusion/dissolution processes and microcracking. A theoretical approach towards deriving an aggregate flow law is presented, where the strain in the constituent phases is assumed to occur by simultaneous operation of diffusive mass transfer and crystal plastic mechanisms (dislocation creep). Both uniform stress and uniform strain rate situations are considered.

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Authors and Affiliations

  1. Geological Studies Unit, Indian Statistical Institute, 203 B. T. Road, 700 035, Calcutta, India

    Dilip Saha

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  1. Dilip Saha
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Saha, D. Flow laws in polymineralic aggregates deformed by a combination of diffusion creep and dislocation creep. Proc. Indian Acad. Sci. (Earth Planet Sci.) 106, 221–224 (1997). https://doi.org/10.1007/BF02843449

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