Geostatistics versus inverse distance squares in ore reserves estimation: Comparative case study in copper ore body in Cyprus

Modis, K; Stavrou, S; Terezopoulos, N; Vattis, D

dc.contributor.author	Modis, K	en
dc.contributor.author	Stavrou, S	en
dc.contributor.author	Terezopoulos, N	en
dc.contributor.author	Vattis, D	en
dc.date.accessioned	2014-03-01T01:28:30Z
dc.date.available	2014-03-01T01:28:30Z
dc.date.issued	2008	en
dc.identifier.issn	03717844	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18864
dc.subject	Geostatistics	en
dc.subject	Inverse distance squares method	en
dc.subject	Ore reserves estimation	en
dc.subject	Sampling density	en
dc.subject.other	Blasting	en
dc.subject.other	Boolean functions	en
dc.subject.other	Copper	en
dc.subject.other	Copper deposits	en
dc.subject.other	Copper ore treatment	en
dc.subject.other	Employment	en
dc.subject.other	Explosives	en
dc.subject.other	Extraction	en
dc.subject.other	Interpolation	en
dc.subject.other	Ore deposits	en
dc.subject.other	Ore sampling	en
dc.subject.other	Ore treatment	en
dc.subject.other	Sampling	en
dc.subject.other	Blast holes	en
dc.subject.other	Case studies	en
dc.subject.other	Continuous	en
dc.subject.other	Copper ores	en
dc.subject.other	Critical values	en
dc.subject.other	Estimation qualities	en
dc.subject.other	Geostatistics	en
dc.subject.other	GREAT-ER	en
dc.subject.other	Interpolation methods	en
dc.subject.other	Inverse distance squared	en
dc.subject.other	Inverse distance squares method	en
dc.subject.other	Ore bodies	en
dc.subject.other	Ore extractions	en
dc.subject.other	Ore reserves	en
dc.subject.other	Ore reserves estimation	en
dc.subject.other	Sampling densities	en
dc.subject.other	Sampling density	en
dc.subject.other	Substantial improvements	en
dc.subject.other	Ores	en
dc.title	Geostatistics versus inverse distance squares in ore reserves estimation: Comparative case study in copper ore body in Cyprus	en
heal.type	journalArticle	en
heal.identifier.primary	10.1179/174328607X228866	en
heal.identifier.secondary	http://dx.doi.org/10.1179/174328607X228866	en
heal.publicationDate	2008	en
heal.abstract	The 'Phoenix' copper ore body is located in Cyprus Island. Its reserves were initially estimated by inverse distance square (IDS) algorithm. Ore extraction begun in 1996 and ever since the owner company keeps a detailed file of blast hole samples analyses. These data are used to for a continuous check of the validity of estimation. Even tough sampling was systematic and dense, the results of these checks revealed small discrepancies between the ore body model and reality and therefore it was decided to employ geostatistics to possibly improve the estimation quality even more. The two resulting models were compared to reality inside the exploited area and showed that no substantial improvement occurred due to the employment of geostatistics. The above is in agreement to recent theoretical results which state that, when the sampling density is greater than a critical value, geostatistics and deterministic interpolation methods give similar estimations. The 'Phoenix' copper ore body is located in Cyprus Island. Its reserves were initially estimated by IDS algorithm. Ore extraction begun in 1996 and ever since the owner company keeps a detailed file of blast hole samples analyses. These data are used to for a continuous check of the validity of estimation. Even tough sampling was systematic and dense, the results of these checks revealed small discrepancies between the ore body model and reality and therefore it was decided to employ geostatistics to possibly improve the estimation quality even more. The two resulting models were compared to reality inside the exploited area and showed that no substantial improvement occurred due to the employment of geostatistics. The above is in agreement to recent theoretical results which state that, when the sampling density is greater than a critical value, geostatistics and deterministic interpolation methods give similar estimations. © 2008 Institute of Materials, Minerals and Mining.	en
heal.journalName	Transactions of the Institutions of Mining and Metallurgy, Section A: Mining Technology	en
dc.identifier.doi	10.1179/174328607X228866	en
dc.identifier.volume	117	en
dc.identifier.issue	1	en
dc.identifier.spage	48	en
dc.identifier.epage	52	en