Direct shear experiments on Solnhofen limestone at high temperature – an experimental analogue of transpression
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Cómo citar

Llana-Fúnez, S., & Rutter, E. H. (2011). Direct shear experiments on Solnhofen limestone at high temperature – an experimental analogue of transpression. Trabajos De Geología, 29(29). Recuperado a partir de https://reunido.uniovi.es/index.php/TDG/article/view/356

Resumen

Specimens of Solnhofen limestone deformed dry in direct shear at 600 ºC, 200 MPa and bulk strain rates of ~5×10-3 s-1, show strain distributed heterogeneously with two high-strain bands close to the specimen edges accommodating most of the displacement. Strain analysis using calcite shape fabric and CPO (measured by EBSD) reveals that non-coaxial strain concentrating at the edges propagates towards the middle of the specimen, where flattening strain is predominant. Strain-hardening associated with flattening prevents initially non-coaxial strain from developing in the centre. Direct shear testing proves to be a good analogue for transpression when free boundaries are present to allow lateral extrusion.
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