Delineation of mineralization zones using concentration-volume fractal method in Pb-Zn carbonate hosted deposits

作者：Delavar Seyed Taghi^*; Afzal Peyman; Borg Gregor; Rasa Iraj; Lotfi Mohammad; Omran Nematolah Rashidnejad

来源：Journal of Geochemical Exploration, 2012, 118: 98-110.

DOI：10.1016/j.gexplo.2012.05.003

• Mineral resource exploration
• Mineralization zones
• Pb-Zn carbonate hosted deposits
• Concentration-volume (C-V) fractal model
• Tangedezan, Iran

This study uses the C-V fractal model to separate mineralization zones especially enriched supergene and hypogene protore in an Iranian Pb-Zn carbonate hosted deposit, based on subsurface data. The Tangedezan deposit is located in central Iran. In order to separate the two major mineralization zones in this deposit, log-log plots of major elements are prepared, which are fitted straight lines that show C-V relationship for Pb, Zn, Ag and Cd especially in NE of the area. Based on power-law relationship between elemental concentrations and their host rock volume, the oxidation and sulfidation zones are separated. Log-log plots for the mentioned elements show three mineralization zones including enriched supergene (oxidation), hypogene sulfide protore and low mineralization zones. The obtained results were compared with geological zonation model. This comparison shows that the interpreted zones by the C-V fractal model are in agreement with the proposed geological model. The C-V log-log plot for Zn reveals that there is an enriched supergene zone (oxidation), which separates out at the Zn grade of 13.8% in Tangedezan deposit. The high sulfide zone (hypogene protore) interpreted to have 7.2% to 13.8% and the low mineralization zone, mainly consisting of low sulfidation and to lesser extent low oxidation, has less than 7.2% of Zn grade in the deposit.

• 出版日期2012-7