Abstarct: Som-Ahani index of Sangan iron mine in eastern anomaly is located 308 kilometers from Mashhad. The study area is a part of central Iran and Lut blocks are located in the North East subzone. In the North East and the East Zone of the Lut block (which is part of zone central Iran), khaf-plutonic belt Volkano Polotonic Kashmar-Bardaskan which sets Sangan mines located in the extreme of the belt. In this study, mineralogy, geothermometry and genesis index Som-Ahani is discussed In this regard, the following library studies and field investigation and sampling of outcrops in the area, the number of samples to choose and prepare healthy and non Weathering thin sections, polished thin polished sent to University of Mashhad. Geological map of the study area was prepared baxsed on the geological map 1: 25,000 Taibad. For the determination of the major elements, rare earths elements, 14 samples analyzed by XRD and ICP-OES to the development of mineral processing Tehran sent. In the following charts geochemical diagrams were used to determine the different geochemical characteristics of intrusive mass, geochemistry of skarn and host rocks. Sarnowsar Eocene intrusive masses in the northern area and penetrated into the limestone host iron mineralization has been created. More by hematite mineralization can be seen as an indication of the oxidizing environment during ore formation. Recent studies, calcic iron skarn samples of a ferrous mining index toxin continental margin subduction zone, the composition of the granite-quartz monzonite intrusion was detecte. baxsed on the results of fluid inclusions homogenization temperatures between 112 to 232 ° C and salinity between 12 and 52 wt% NaCl equiv estimated. baxsed on these results, NaCl is the most abundant salt found in these fluids.