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Über Beanspruchung und Verformung von Gesteinen

III. Synkristalline Verformungen an Auerbach-Marmoren bei axial-symmetrischer und echt dreiachsig wirkender Beanspruchung

Deformation of rocks

III. Syncrystalline deformations on marbles from auerbach at axial-symmetric and real triaxial stress

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Abstract

A new real triaxial deformation apparatus for p 1≠p 2≠p 3 tests and temperatures up to 700° C has been developed. In five creep tests over 8 hours the strain-time curves at 650° C for axial and orthorhombic symmetry of stress are plotted in the three main directions and compared with the petrofabric diagrams of the deformed material. In all tests the symmetry of the petrofabrics can be correlated with the symmetry of the external loading. From the strain-time curves it can be deduced that the intermediate loading p 2 is of great influence in the stress-strain behavior.

Syntectonic recrystallization is found to be common for all tests in the form of broad lensoid and irregular defined {01¯12} lamellae oriented favorably for twinning. Measurements of c-axes in newly recrystallized grains show preferential alingnement subparallel to the axis of maximum principal loading.

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Authors and Affiliations

  1. Mineralogisch-Petrographisches Institut u. Museum der Universität, Olshausenstr. 40-60, 2300, Kiel

    F. Karl &  H. Kern

Authors
  1. F. Karl
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  2. H. Kern
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Der Deutschen Forschungsgemeinschaft sei für die finanzielle Unterstützung der Untersuchungen besonders gedankt.

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Karl, F., Kern, H. Über Beanspruchung und Verformung von Gesteinen. Contr. Mineral. and Petrol. 18, 225–240 (1968). https://doi.org/10.1007/BF00398893

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  • DOI: https://doi.org/10.1007/BF00398893

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