Semi-detailed mineral exploration in the Bavanat County
This project was conducted based on a contract between the Industries and Mines Organization of Fars and Kan-Iran Consulting Engineers at 2005. The aim of project was to assess the laterite deposits for nickel mineralization in the Bavanat region. The region is 440 Km2 extending along NW-SE from Kupan to Sarjahan.
The project was carried out in two steps. At first, preliminary study for identification of promising areas and then a semi-detailed study for selection of best nickel-bearing laterite zone. In this study we collected over 200 samples for geochemical analysis, mineralogy, thin section and petrography. Soil samples were analyzed in Als-Chemex laboratory of Canada by ICP-MS, XRD, and XRF methods. Excavation of trenches and drilling low depth boreholes totally reached to 300 m.
The study area is located in the contact of Sanandaj-Sirjan and Zagros Crushed zones in which the oldest rocks belongs to the Neotethys oceanic crust of Upper Cretaceous. The upducted ophiolitic rocks include ultramafic to mafic rocks that weathered into laterite in a tropical climate during Paleocene. Paleocene conglomerate and red sandstones covered the laterite soil. These units are covered by Eocene conglomerate and limestone.
In the preliminary step, 16 traverses were visited and 25 rock and soil samples were taken for analysis and petrography. Four zones were identified and selected for second step of study. They include Rostami, Baboljose, Cheshme-Teriyaki and Gardane-Barhaj.
In the second step, 93 low-depth holes (1 m) and five trenched (92.1 m) were excavated in the mentioned zones. At whole 96 and 51 samples were taken from holes and trenches, respectively.
Cheshmeh Rostami area with 0.6% nickel and Gardane-Barhaj with more than 0.5% nickel are the best promising areas for nickel mineralization in the study region. The details of data interpretation are included in the report.