Systematic geochemical exploration project within 1:100,000 sheet "Natanz"
Project Managers: GSI
By: Ali Asghar Hassanipak
The report presents the result of systematic geochemical exploration project in the 1:100 000 sheet of Natanz. The study area is located between 51 30' -52 E and 33 30'-34 degrees N. the area has a dried climate with 138 mm average annual precipitation. Rock units in the area include igneous-sedimentary complexes. Except small contact metamorphism, there is no metamorphic facies in the area. Sedimentary complexes are Precambrian, Mesozoic and Cenozoic in age.
Geochemical sampling from stream sediments was done by three groups (four persion in each group). They collect maximum two samples from each point including the main sample and the duplicate sample. Each geochemical sample consisted of 100 gram of 80-mesh sediments achieved after sieving the dried deposit. For wet deposits, 3 Km of deposit was collected to be dried and sampled in the camps. The samples were marked by five-digit codes and sent for analysis.
After receiving the results of geochemical samples, and drawing the element distribution maps and identification of anomalous zones, based on the relative enrichment coefficient (87.5, 99.58 and 99.9%), the final result was checked.
Filed control of anomalies was done by sampling from heavy minerals and mineralized rocks. We collected 89 heavy mineral samples from anomalous zones with six duplicate samples. We also collected 57 mineralized and altered samples; the altered samples were taken from the alteration zones within the geochemical anomalies.
Another procedure was the consideration of fault density in our analysis. The full procedure is described in the report. Anomalies were correlated with fault density, heavy mineral assemblages and mineralized samples. All anomalies with more than 99.5% frequency were assessed in the project. The report introduces favorable zones in detail.