Digital image correlation data from analogue modelling experiments addressing orthogonal and rotational extension at the Tectonic Modelling Lab of the University of Bern (CH)

Zwaan, Frank; Schreurs, Guido; Schmid, Timothy; Warzitzka, Michael; Rosenau, Matthias (2020). Digital image correlation data from analogue modelling experiments addressing orthogonal and rotational extension at the Tectonic Modelling Lab of the University of Bern (CH) [Dataset]. Potsdam: GFZ Data Services 10.5880/FIDGEO.2020.001

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This data set includes the results of digital image correlation of ten brittle-viscous experiments on crustal extension and four benchmark experiments performed at the Tectonic Modelling Lab of the University of Bern (UB). The experiments demonstrate the differences in rift development in orthogonal versus rotation extension. Detailed descriptions of the experiments and monitoring techniques can be found in Zwaan et al. (2019) to which this data set is supplementary. Additional background information concerning the general modelling approach are available in Zwaan et al. (2016).. The data presented here consist of movies displaying digital image correlation (DIC) derived surface and internal displacement fields as well as profiles of the lateral cumulative surface displacements.

Digital photographs of the experimental surface and digital image cross section of the computed CT-scans were analyzed with DIC (Adam et al., 2005, 2013) techniques to quantify displacements in the image plane at high precision (<0.1 mm). DIC was undertaken with the software DaVis 8.0 (LaVision) applying 2D-DIC (FFT-legacy) multipass processing with a final interrogation window size of 32x32 (CT: 12x12) pixels and 50% (CT: 25%) overlap.

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