9405

8687

كارشناسي ارشد

معدن - اكتشاف معدن

اصفهان: دانشگاه صنعتي اصفهان، دانشكده معدن

1393

هجده،139ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حسن طباطبايي

8/10/93

محمدرضا ايران نژاد، سعيد پورمنافي

مهندسي معدن

ID8687

AbstractShadan region is a part of Lut Block and East Iran Belt located 65 Km west of Birjand South Khorasan Province The correct decision could have a significant effect onexploration projects The main object of this study is combination of new methods andintegration of various exploration data in a GIS environment to identify areas of highmineral potential for further drillings The input data layers for GIS integration arecomposed of lithologic maps alteration geophysical and geochemical layers and tectonics This area consisting of outcrop of Eocene volcanic unit and also Oligo Miocene intrusivemasses In this research using techniques of processing ETM and Aster satellite datainclude combining false colored RGB band ratio least squares regression LS Fit andprinciple component analysis PCA some alteration including argillic propylitic phylicand zones containing iron oxides that can be directly or indirectly related to themineralization identified and introduced In the next step using the results of chemicalanalysis of 46 elemente by ICP 297 rock samples of Shadan area were analyzed Firstunivariate statistical analysis was performed on the data and single element halo of gold cooper and molybdenum maps were prepared Then multivariate studies included factoranalysis cluster analysis and geochemistry mineralization probability index GMPI wasperformed between elements and important factor of the framework map was presented Inthe next step a magnetic survey carried out in the study area and the total magnetic fieldintensity were measured The total magnetic field intensity were measured at 547 stations Then using Genetic Algorithm and Geosoft Software the magnetic maps were mapped Finally two new combination methods of Fuzzy Logic and TOPSIS were used in thisresearch to create final mineral potential map for further drillings at the Shadan area Theresult showed that these two methods support and complete each other But TOPSISmethod proved to be the best method for combining the exploration data Comparing thefinal integrated potential maps with the field evidences mineralized locations and alsoanalytical results of 6 boreholes confirm the importance of TOPSIS method in this regards Key words Shadan GIS Genetic Algorithm Fuzzy Logic TOPSIS

حسن طباطبايي

محمدرضا ايران نژاد، سعيد پورمنافي