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An example of the application of auto-correlation and spectral analysis in mining explorationNormal access

Author: D. D. Sarma
Journal name: Geophysical Prospecting
Issue: Vol 22, No 4, December 1974 pp. 747 - 760
DOI: 10.1111/j.1365-2478.1974.tb00115.x
Organisations: Wiley
Language: English
Info: Article, PDF ( 659.49Kb )

Summary:
This paper deals with a case study on the application of auto-correlation and spectral analysis methods to mineral assay data taken along seven drives and two winzes concerning the McTaggart's (West) lode of Kolar gold fields. The general model conceived in this study is: measured (estimated) ore grade at jth location =true value + error at jth location. Employing an auto-correlation function of the form C e- a |k| for signals, the respective contributions of signals and noise to the total logarithmic variances for the data along drives and winzes are analysed. Smoothed spectral density estimates and their 90% confidence limits are computed for the series of data.


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