Oriented Rock Samples for Detailed Structural Analysis

A significant part of the detailed structural analysis can be done in the field. However, in many cases, especially in studies on ductile shear zones, further in-depth microstructural analysis is needed. For this purpose, correct collection of oriented rock samples with various tectonic structures is crucial for legitimate structural analysis. Samples collected in the field with known spatial orientation permit the determination of various geometric and kinematic characteristics of the observed structures. Oriented samples collected from field also permit to note and interpret new, previously omitted and/or invisible structures that have not been noticed in the field. This article presents techniques useful for sample collection in the field, coordinate systems applicable in the structural studies, and methods to re-orientate samples, together with ways to select thin section orientation. These are essential steps toward detail structural analysis.