It is obvious that geochemical exploration is one of the most efficient methods for regional and local mineral exploration. This method requires specialists and application of updated science to save time and money. Still, this method is one of the cheapest exploration techniques across the world.
Iran is a large country with high potential of various minerals. In order to develop the mineral industry and exploitation, GSI started regional and thematic exploration projects across the country.
Kivi is a 100K sheet located in the northwest of country that selected for geochemical exploration. The project was carried out by 714 geochemical samples and 44 additional samples. After preparation, these samples were sent to Amdel laboratory of Australia to be analyzed for 22 elements. The elements include Sn, W, Au, Cr, Hg, Mn, Sr, Ni, Zn, Ba, Be, Ti, As, B, Bi, Co, Mo, Pb, Sb, Se.
The accuracy of analysis results is good and the precision is acceptable. Among 22 elements, 7 elements have censored data that include Au, Hg, Mo, As, B, Bi, and Se. of these elements, Hg and B were omitted because of large number of censored data (more than 90%).
After replacing the censored data, out of order data were omitted to normalize the data. Then multivariate and univariate statistical methods were applied to extract required quantities. Drawing histograms, correlation matrix of elements, cluster analysis and factors analysis are next steps of the data analysis. Six factors (complex variant) were extracted by the factor analysis.
F1= Be, Sn, W, Pb, Mo, (Bi)
F2 = Ni, Ti, Zn, Mn, Co, Cr
F3 = Cu, Ba, Sr
F4 = As, Sb
F5 = Ag, Se
F6 = Au
Elements in the parenthesizes are those that has lower factor than the main, but relatively high to be considered in the factor.
Preparing unielement maps was done for these 20 elements Au, Ba, Be, Co, Cr, Cu, Ni, Sr, Zn, Bi, Pb, As, Mo, W, Sb, Sn, Sn, Ag, Ti, Mn, Se.
Ultimately the report includes the distinct maps of elements and factors and also anomalies with explanation. Conclusively, favorable zones are introduced and prioritize and suggested for controlling the anomaly.
In addition, 174 heavy mineral samples were studied that can be good pointers for confirming geochemical anomalies.