Report on mineral prospection in the Nakhyleh 1:100000 sheet
Geological Survey of Iran
Regional exploration projects of Sistan and Baluchestan
The study area is located in the framework of 1:100000 Nakhyleh sheet, in the Sistan and Baluchistan Province, near the city of Zahedan, in the southeast of 1:250000 Nakhylab (Absard) quadrangle. This sheet locates the border Sistan and Baluchestan and Kerman Provinces. The geographical coordinates are 30-30 30' N and 59° 30'-60E. This sheet includes four 1:50000 topographic maps of Gharb-e Kuh-e Lunkeh, Absard, Gharb-e Absard and Kuh-e Lunkeh.
In this sheet, the stream sediment sampling method used to geochemically explore the area with a network designed with regard to factors such as lithology, faults, etc. the designed network had maximum compatibility with the center of gravity. In an area 1550 square kilometers totally 228 samples taken and analyzed for 29 elements, ie La, Zn, Cr, Mn, Ba, Au, S, Ag, As, Co, Cu Cd, Be, P, Li, Ga, Sc, Sr, V, Sn, Ge, Y, Yb, Eu, Nb, Mo, Nd, W, Ni. To control carefully the result of analyses, the Thompson control charts was used to calculate the relative error. To remove the effect of lithology from the index values calculation, we normalize the values with regard to individual variables related to the median of same community. univariate and multivariate Statistical processing include the calculation of correlation coefficients, cluster analysis, feature analysis, factor analysis, etc. the results were interpreted in this way to complexes parageneses of elements were identified.
Several maps prepared for univariate analysis, factor analysis, feature analysis, and PN. Using the network estimation program for raw and enrichment index data, 4 regional geochemical anomalies were introduced.
The control Phase to identify the real anomalies was done by field studies and heavy mineral and mineralized sampling (31 and 13 samples respectively). For the heavy mineral samples processing has been carried out and Histograms were drawn.
Based on the study, copper and arsenic mineralization is evident respectively at south and north of eastern half of Gharb-e Kuh-e Lunkeh sheet; however the most important activity is the chromite exploration.
Combining information from geochemistry, heavy minerals, mineralized samples, fault density and the results of geophysical survey, we finally introduced the north Absard area in the west of Lunkeh Mountain as a promising zone for gold, copper and associated elements.