Programs to Estimate Compaction from Scanned Thin Section Images and Digitized Plagioclase Chain Networks

(Development supported by NSF Grant 0106538)

Intercept+Squish.xls (05/06/02 MSExcel) - determines apparent compaction (anisotropy) from the orientation and length distribution of network links - see the SQUISH worksheet

The necessary  link data is extracted from a DXF file (version R10, R12, or R14) as a CSV format using the DOS program FILTER_DXF.exe (v01.24.02))

Sample   DXF File: W-Up.dxf ;   CSV file: W-Up_Intercept.csv

Intercept+Squish.xls (05/06/02 MSExcel) - determines apparent compaction (anisotropy) from orthogonal intercept ratios

The necessary  link data is extracted from a DXF file (version R10, R12, or R14) as a CSV file using the DOS program FILTER_DXF.exe (v01.24.02)

Sample   DXF File: W-Up.DXF ;   CSV file: W-Up.CSV

StarPoly.exe (v07.15.02) (MS DOS) - determines apparent compaction (anisotropy) from the the moment of Visual Polygons centered on a user specified rectangular grid.

StarPoly.pas (v07.15.02) - the PASCAL program code

The necessary  link data is extracted from a DXF file (version R10, R12, or R14) as a STP file using the DOS program FILTER_DXF.exe (v01.24.02)

Sample   DXF File: W-Up.DXF;   STP file: W-Up.STP

Variogram.exe (v.01.03.02) (Windows) - generates a csv  input file for ImageAnisotropy.xls from a grayscale BMP scanned thinsection image

Variogram.pas (v.01.03.02)- the PASCAL (Delphi) program code

VarioAnisotropy.xls (v.01.03.02) (MSExcel) - Computes a Least Squaraes Estimate of the 2D Variogram Anisotropy

Sample   BMP File: W-Up.BMP ;   CSV file: W-Up_Variogram.CSV

LSQPooled.nb (v.01.23.02) (Mathematica 4.0) - calculates Least-Squares estimate of 3-D anisotropy from 2-D compaction % and directions provided by the various methods described above.

For detailed descriptions of the various methods and instructions on downloading and using the programs click on the appropriate links below: