Systematic Geochemical Exploration Report sheet of 1:100,000 Rey Abad

Description

Abstract Studies range in sheet with a scale of 1:100,000 of Ray Abad is located in north east of the country in the western part of northern half of Jajram quadrate in coordinates of 55 ° 30 ’- 56 ° 00’ and 36 ° 30 ’- 37 ° 00’. In geological viewpoint, this area is emplaced in frontal zones in Kopet Dagh in eastern Alborz (Binalood zone) and includes also a small part of central Iran, which involves geological events, depended on collision between these two zones. In geographical standpoint, this area including mountainous parts with a trend of  approximate NE - SW in northern mid and covered plains by Quaternary deposits are in Southern mid of the sheet. In Southern mid of the sheet, except to Quaternary deposits, major rock outcrops are to the upper part of URF including  cream to reddish marl with sandstone intercalations and brown color  siltstone that has of Miocene age. In northern mid, most of outcrops are at first  to limestone, marl, argillic limestone and dolomite related  to middle to upper Jurassic and then glauconite limestone inclined to pink in Upper Cretaceous. Granite stone an age younger than Jurassic in the most end part of south-eastern of the sheet shows a small outcrop. In the present study projects, the number of 681 sediment samples and 167 channel samples from heavy mineral in range of sheets are collected and studied. On a data of channel sediment samples, initial preparation, univariate and multivariate processing have been carried out and have been taken as various tables and charts in the second chapter. Estimation of  rich index for all samples with regard to upstream rock samples has been done and given results in the second chapter. The map of  uni element and multi elements anomalies (factor) based on method of network estimation with a description of nomalies has been given in third chapter. Chapter four has paid statistical surveys of heavy mineral samples and description of its anomalies. Result of taking of 10 lithogeochemical samples in stage of anomaly control and also to introduce promising areas have been given in fifth chapter and the result and conclusion and recommendations on the sixth season. Results of heavy mineral studies have shown existence of minerals such as galena, pure lead, Vulfonites, Sikute, pyrite group, barite and some rock composer minerals. Also the prepared maps as estimation of network for elements (single element and factor) show anomaly that  most important of them are copper and nickel anomalies- and chromium - cobalt with anomalies with first factor (Mn, Ti, P, Cu, Ni, Cr and V) is limited in the North West and South East which is accompanied with gallena, pure lead and Gutite presence in some samples of heavy mineral in the northwest section. another important anomaly is associated with lead element which is located in north of the sheet and in area of Veskin Village. Meanwhile, some heavy minerals of this area contain Musikut and Vulfunite.  Also adaption of third factor  anomaly (Sr, Cs) and the barium element in the North-East of the Sheet 1:50,000 is of Baklran, near to Gazeh which heavy minerals contain also barite and celestine seems important. Introduction Today, a broad spectrum of geochemical exploration methods for mineral exploration is one that has a special place in the assessment of the economic potential of each region. Geochemical exploration, as we know it today, during the 1930 decade has begun from former Soviet Union, and in late 1940 decade and early 1950 decade, preliminary efforts to the use of geochemical exploration in Western countries followed efforts and methods the Soviets. The usage of geochemical methods in the geological exploration in regional scale, results in scientific and technological advancement of geology and considerable success in exploring new mineral reservoirs. Therefore, in these methods, present background information, in relation to geology and development of various rock units, structural geology topics such as folding, faults, geophysical data were used in designing of sample position. Different rock units may be host rocks of different types of mineralization. While some of geological phenomena can be good channels for transmitting of mineralized fluids or concentration of element and different materials. Geophysical data can provide also proper information from igneous masses that can be factor or host of various mineralizations, regarding that they can show the dominant trends in the region can control distribution. Also the direct analysis of samples from abundance of elements and analyzing and processing of data obtained by using different methods or techniques and various statistical methods, also study of heavy minerals in channel sediments has lead to increasing of efficiency of such studies. This method of geochemical exploration at different scales with different have considerable and various usages, that in this field using of data and geochemical results in determination of belts, states and metalogenic regions has been useful.  Also in larger scales, unit potential and different geological can be identified from mineral standpoint. In this field using of geochemical exploration in scales of 1:100,000 have abundant.  Today, such explorations in our country, are usually for area with specified area (approximately 2500 square kilometers), which are done according to the limits of geological map 1:100,000. So far much part of these areas in Iran zone have been evaluated by the GSI and fewer areas by industries and mines exploration organizations of the province. Rey Abad Map with a scale of 1:100,000 is one of the cases has been evaluated by the GSI from geochemical viewpoint. In this regard, Consulting Engineers of Pichab was selected as an advisor and what is more, including office – field and laboratory reviews and also various results obtained from this exploratory operation.