期刊
JOURNAL OF STRUCTURAL GEOLOGY
卷 29, 期 7, 页码 1256-1266出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsg.2007.02.006
关键词
fold; fold classification; three dimensional folds; differential geometry; curvature; Gaussian curvature; mean curvature; geologic curvature
We provide methods to objectively characterize 3-D folds and present applications for different fold types at varying scales and formed in different tectonic settings. Algorithms based on differential geometry quantify all geometric aspects of the surfaces. The geologic curvature classification defines the shape and orientation of points on the folded surface. The curvature threshold introduces a method to extract geologically significant aspects of fold shape by disregarding curvature magnitudes less than a certain value. This permits the evaluation of the cylindricity of the folded surface at particular points. (C) 2007 Published by Elsevier Ltd.
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