The criterion-base iterative stepwise Backward Elimination (BE) method was used to predict Au according to the main variables (Ag, Cu, Pb, and Zn). The optimization process of the quadratic polynomial model are carried out on different trenches. Whereas, Pb and Zn with Ag×Zn and Pb×Zn are significant to determine the lateral dispersion of Au. It means Zn is the predominant element in near surface zone. Therefore, it point out that the polymetallic (Au-Ag-Cu-Pb-Zn) high-sulfidation hydrothermal veins may be related to a porphyry deposit at depth. Laterally, 2D surface contour maps using kriging confirms all the results of the dispersion pattern of elements at Glojeh.

Oman Sea is connecting belt between the Indian Ocean and PersianGulf. Because it strategic and environmental aim, presence of naturalradionuclide 226Ra, 232Th, 40K and 137Cs as man-made element is considered.Water samples were taken from 36 marine spots at the coastal strip fromHormoz canyon to Goatr seaport in the northern coast of Oman Sea.Correspondence analysis is used to identify variation and relationshipbetween samples (Q-mood analysis) and variable (R-mood analysis) basedon approximate χ2 distances. Radioactive elements (226Ra, 232Th and 40K),physical (temperature, pH, turbidity, conductivity, special density) andchemical (salinity, oxygen and chlorophyll) parameters of water for 36samples handled by correspondence analysis, there are two outstandingresult, 1) Radioactive elements show high correlation in factors by greatereigenvalue, and 2) some of the samples such as W13, W24 and rather W02,W05 and W12 show highest activity from Radioactive elements and alsotemperature and conductivity show nearest relation with them in manyfactors.

We applied the Backward Elimination (BE) method as a criterion-based iterative stepwise method to estimate the concentration of Au from the variables Ag, Cu, Pb, and Zn. We optimized the quadratic polynomial model (QPM) on various boreholes and trenches. The results indicate that the vertical zonation of Au is associated with Ag and Cu, along with their respective elemental functions Ag×Cu, Pb 2 , Pb×Zn, and Zn 2 . On the other hand, the lateral dispersion of Au is determined by Pb and Zn, along with the essential functions Ag×Zn and Pb×Zn. Zonation is in-depth and is indicated primarily by Zn rather than Cu and minor Pb, with Cu-Pb-Zn gradually extending upward at the upper levels. The vertical zonation trend describes the Ag<Au<Cu<Pb<Zn sequence from proximal to distal veins, with the near-surface zone exhibiting enrichment in Zn. At the Glojeh site, the host rock value, Ag×Cu, Zn 2 , and Pb×Zn, were identified as strong indicators of the vertical occurrence of Au in the upper host rock, whereas Pb 2 proved more suitable for the deeper boreholes. Cu→Pb→Zn demonstrates the enrichment trend from depth to the surface. The lateral kriging surface estimation confirms the dispersion pattern of elements revealed in-depth at Glojeh. Our aims with this approach were to reduce the cost of fire-assay analysis due to high precision estimation by associated variables and determine elemental interactions and the lateral or vertical dependencies of elements.

Significant progress in the classification, definition, and understanding of the main Au deposit types could significantly aid improvements in Au exploration. Because of the wide occurrence of Au in the central part of the Tethyan Eurasian Metallogenic Belt, Iranian structures composed of more than seventeen zones (arcs and blocks) are considered as having one of the largest Au reserves in the Middle East. Without attempts at understanding the tectono-magmatic evolution of Iran and the geodynamic settings of Au deposition, the establishment of a reliable predictive exploration model for Au-type deposits in Iran and other parts of the world will be unsuccessful. By considering, a total number of 33 Au deposits and prospects in Iran, a mineralization sequence is revealed from VMS, orogenic, Carlin-type, epithermal/ porphyry Cu-Au/ skarn, epithermal/ and IOCG, respectively. The trend of deposition gradually changes in the SW-NE axis to intrusion-related, epithermal, and porphyry Cu-Au deposits at UDMA and post-arc magmatism. Orogenic and volcanogenic massive sulfide (VMS) deposits occur adjacent to the northeast Zagros Fold and Thrust Belt, at the SSZ. The Zagros Orogeny and associated post-collisional magmatism at Urumieh-Dokhtar Magmatic Arc (UDMA) host many porphyry, epithermal, and intrusion-related Au deposits, with a major magmatism peak in the Miocene. The finding of the manuscript reveals that orogenic and Carlin-type Au mineralization are linked genetically. After each associated subduction for paleo-tethys (286-215 Ma) and Neo-tethys (210-68 Ma) in Iran, VMS and orogenic Au-deposits are formed in the border of the subduction (±obduction) zone. The porphyry, intrusion-related, epithermal, and IOCG mineralization are emplaced in appropriate formations and structures during collision and post-collision processes.