Abstract
Twelve runs were performed with an analogue material consisting of a mixture of a synthetic resin mixed with kaolin, biotite and quartz grains. Mineral fabrics of biotite were obtained with the help of a 3D-reconstruction method using data obtained from two oriented sections, and confirmed by means of anisotropy of magnetic susceptibility measurements. In low concentration suspensions, the fabric develops in close agreement with theory. In concentrated suspensions, the interactions between grains predominate, giving fabrics with flattening symmetry and low intensity parameters. In some experiments, and in agreement with mineral fabric data and magnetic measurements, a biotite zone-lineation parallel to the Y-axis of finite strain develops. This effect is attributed to the rotation of the biotite grains around the Y-axis, induced by their close interactions with the more spherical grains of quartz. Comparison of experimental results with data from real samples provides an explanation for the differences commonly observed between feldspar megacryst subfabrics and biotite subfabrics.KeywordsSolid FractionMineral FabricAnalogue MaterialStrain EllipsoidMagmatic FabricThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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