Kinematic indicators, including certain strain fringes, represent an important group of structures related to the progressive deformation in rocks. The evolution of these fibrous textures can be explained by the combination of multiple mechanisms of deformation and fluid flow, mainly controlled by the orientation of the strain field and the morphology of the grains. In general, the observations are done with an optical microscope and compared with computational models of growth. This work proposes a combination of crystallographic and cathodoluminescence data obtained in rocks from banded iron formations of the Iron Quadrangle in Brazil to represent an example of how complementary analytical techniques can be useful to understand geological problems. The chosen sample exhibits a strain fringe structure of quartz around a clast of magnetite partially transformed into goethite and hematite. Through the crystallographic data it was possible to identify the grain boundary morphology and domains of low deformation areas. On the other hand, the cathodoluminescence signal evidenced the occurrence of grains with a higher concentration of crystalline defects.

中文翻译：

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岩石中变形石英晶粒的EBSD和CL研究：铁四边形中一个应变条纹结构的示例。

运动学指标，包括某些应变条纹，代表了与岩石中逐渐变形有关的重要结构。这些纤维质地的演变可以通过变形和流体流动的多种机理的结合来解释，这些机理主要由应变场的方向和晶粒的形态控制。通常，观察是用光学显微镜完成的，并与增长的计算模型进行比较。这项工作提出了从巴西铁四方带的带状铁层中的岩石中获得的晶体学和阴极发光数据的组合，以代表互补分析技术如何可用于理解地质问题的一个例子。所选样品在部分磁铁矿转变为针铁矿和赤铁矿的磁铁矿周围显示出石英的应变条纹结构。通过晶体学数据，可以确定低变形区域的晶界形态和区域。另一方面，阴极发光信号表明存在具有较高浓度的晶体缺陷的晶粒。