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Geological Society, London, Special Publications; 1992; v. 63; p. 185-190;
DOI: 10.1144/GSL.SP.1992.063.01.19
© 1992 Geological Society of London

ONE-D: a program for one-dimensional composite optimization

J. A. C. Diering

Vice-President Services, GEMCOM Services Inc., 580 Hornby Street, Vancouver, British Columbia, Canada V6C 3B6

The process of compositing sample data from drillholes or traverses for orebodies bounded by a grade cut off rather than a geological boundary can be time consuming. A method for the optimal computation of such composites is described in this paper. A computer program ONE-D has been written which maximizes the dollar value of a composite subject to constraints on minimum and maximum length and a user definable seed value. The seed value is used to force composites to be ‘close’ to a desirable mining line. For complex layered structures, interactive intervention from the user is allowed when structures bifurcate or are folded.