A graphical method and workflow for the generation of structure contours for horizontal cylindrical folds

IF 2.6 2区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Graham J. Potts
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引用次数: 0

Abstract

A graphical method developed for the construction of structure contours for inclined planar surfaces has been extended to curved or folded surfaces with cylindrical geometries and horizontal axes. These structure contours can be used to constrain the outcrop trace of a folded contact on a geological map. The extended method requires, as a minimum, a field of orientation data and the map position of a single elevation on the contact under investigation. The method utilises orientation data collected on and around a partially mapped trace of a folded contact to constrain the outcrop trace throughout a geological map. The method uses a vertical cross-section that is parallel to the profile plane of any folds present. Crest, trough and hinge points identified in the cross-section can be projected on to the geological map in their correct positions and elevations. Similarly, structure contours on fold axial surfaces can be projected on to the geological map and the contours used to locate the axial traces of cylindrical folds with horizontal axes.

生成水平圆柱形褶皱结构轮廓的图形方法和工作流程
为绘制倾斜平面的结构等值线而开发的图形方法已扩展到具有圆柱形几何结构和水平轴线的曲面或褶皱面。这些结构等值线可用于约束地质图上褶皱接触点的出露轨迹。扩展方法至少需要一个方位数据域和所调查的接触面上单个高程的地图位置。该方法利用在部分绘制的褶皱接触痕迹上及其周围收集的方位数据,对整个地质图上的露头痕迹进行约束。该方法使用与任何褶皱剖面平行的垂直横截面。在横截面上确定的峰顶、谷底和铰链点可以按照正确的位置和标高投影到地质图上。同样,褶皱轴向表面的结构轮廓线也可以投影到地质图上,并利用轮廓线确定具有水平轴线的圆柱形褶皱的轴向痕迹。
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来源期刊
Journal of Structural Geology
Journal of Structural Geology 地学-地球科学综合
CiteScore
6.00
自引率
19.40%
发文量
192
审稿时长
15.7 weeks
期刊介绍: The Journal of Structural Geology publishes process-oriented investigations about structural geology using appropriate combinations of analog and digital field data, seismic reflection data, satellite-derived data, geometric analysis, kinematic analysis, laboratory experiments, computer visualizations, and analogue or numerical modelling on all scales. Contributions are encouraged to draw perspectives from rheology, rock mechanics, geophysics,metamorphism, sedimentology, petroleum geology, economic geology, geodynamics, planetary geology, tectonics and neotectonics to provide a more powerful understanding of deformation processes and systems. Given the visual nature of the discipline, supplementary materials that portray the data and analysis in 3-D or quasi 3-D manners, including the use of videos, and/or graphical abstracts can significantly strengthen the impact of contributions.
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