Abstract
In this paper we present two different approaches to compute variograms along folds in layered deposits. The common objective of the two methods is to measure the vector distance between samples in a “natural” coordinate system with axes parallel to strike, down-dip direction and true thickness of the layer. Because of the folded structure, the orientation of the reference system is changing at every point of the deposit.
Both methods necessitate the knowledge of the stratigraphie position of every sample. The first method is applicable to de-posits with about cylindrical folds i.e. where the profile of the folds does not vary too much from one section to the next. In this case one of the coordinates is measured along these profiles which must be digitized. The other two coordinates are the distance along the axis of the folds and the stratigraphie position of the sample. In the second method, the true thickness vector at any point of a layer is determined by kriging the gradient of the stratigraphie position.
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© 1984 D. Reidel Publishing Company
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Dagbert, M., David, M., Crozel, D., Desbarats, A. (1984). Computing Variograms in Folded Strata-Controlled Deposits. In: Verly, G., David, M., Journel, A.G., Marechal, A. (eds) Geostatistics for Natural Resources Characterization. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3699-7_5
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DOI: https://doi.org/10.1007/978-94-009-3699-7_5
Publisher Name: Springer, Dordrecht
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