Akademik Veri Yönetim Sistemi
INTERNATIONAL GEOLOGY REVIEW, cilt.43, sa.8, ss.676-682, 2001 (SCI-Expanded)
Knowledge of the spatial variability of grade is important for commercial evaluation of mineral deposits. The low-grade, Kizilyuksek-Yataardic chromite deposit in Karsanti, Adana is one of the greatest reserves in western Anatolia, Turkey and offers great potential. However this deposit lacks geologic information needed to provide a better understanding of the spatial variability of Cr2O3%. In this paper, geostatistical tools are used to improve the understanding of the vertical variability of Cr2O3%. The vertical variability is characterized by an average down-hole variogram from core measurements. The variogram exhibits nested structures at 10, 50, and 100 m. Because geologic information is not adequate to explain the source of these features, geostatistical simulation of Cr2O3% with depth is used. The results indicate that the chromite mineralization is characterized by zonal structure, with average size of the zones being 50 m, and average distance between them being 100 m. A study of the most variable holes also shows that these holes have the greatest effect on the average down-hole variogram.