Estimation of lignite reserve in the Kalburcayiri field, Kangal basin, Sivas, Turkey

Tercan A. E., Karayigit A. İ.

INTERNATIONAL JOURNAL OF COAL GEOLOGY, vol.47, no.2, pp.91-100, 2001 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 47 Issue: 2
  • Publication Date: 2001
  • Doi Number: 10.1016/s0166-5162(01)00033-7
  • Journal Name: INTERNATIONAL JOURNAL OF COAL GEOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.91-100
  • Keywords: lignite, geostatistics, variogram, global estimation, error variance
  • Hacettepe University Affiliated: Yes

Abstract

This paper addresses a case study on global estimation of lignite reserve in the Kalburcayiri field from the Sivas-Kangal basin, which is one of the most productive lignite basins in eastern Anatolia, Turkey. The two lignite seams, which were developed in a fresh-water lacustrine depositional environment during the Pliocene time, are currently being exploited in the Kalburcayiri open-cast mine for feed coal to a power plant with 300-MW capacity. Tonnage, thickness and quality parameters (ash yield, total sulphur content, and calorific value) of the lignite are variables considered in this study. The global estimates of these variables together with 95% confidence limits are obtained using the approximation principle of global estimation. A random stratified grid is fitted to available boreholes; the variograms for thickness and lignite quality parameters are estimated and modeled. The models are used in calculating estimation error variances that will later be used in constructing 95% confidence intervals for the true values. (C) 2001 Elsevier Science B.V. All rights reserved.