DBPapers

THE ESTIMATION OF FE AND P IN LOW GRADE STOCKPILE OF CHOGHART IRON MINE OF IRAN

AUTHOR/S: S. KASMAEE, J. GHOLAMNEJAD, A. R. YARAHMADI BAFGHI
Sunday 1 August 2010 by Libadmin2009

9th International Multidisciplinary Scientific GeoConference - SGEM2009, www.sgem.org, SGEM2009 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 14-19, 2009, Vol. 1, 503-508 pp

ABSTRACT

The estimation of important parameters at Choghart mine stockpile is accomplished by
sampling specific parameters that allow detection of useful parts of the Low Grade
stockpile. Huge amount of low grade broken rocks near the open pit can causes some
environmental problem. Therefore, determination of dump parameters became
important in this mine. In this research the estimation of Fe and P was fulfilled in low
grade stockpile of Choghart. The Estimation of these two parameters (Fe & P) can be
used for mapping the error distributions and then prediction of specific areas for more
sampling. This paper outlines a Geostatistics method to perform in order to have a data
set consistent with the Geostatistical model to be used in the estimation of unknown
values. This estimate consist of following steps: preparing database, separating
statistical homogenous region, trend analysis, variography and estimation via ordinary
Kriging method. Identifying the variogram modeling revealed a high nugget effect. To
reduce the nugget effect, the stockpile is divided into three homogenous zones.
Geostatistical estimation technique showed that the amount of reserve in this stockpile
is equal to 1.4 million tons at 40% of Fe and 0.52% P.

Keywords: low grade stockpile, high nugget effect, ordinary Kriging