TN843 : Lead & Zinc exploration by using Resistivity and Inducted polarization methods in Takht – pey area, Tash, Shahrood
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2018
Authors:
Mehdi Zarei [Author], Ali Reza Arab-Amiri[Supervisor], Abolghasem Kamkar Rouhani[Supervisor], Hadi Biari [Advisor]
Abstarct: Today, the geophysical methods are widely used in mining activities, including tracking, semi-detailed and detailed exploration, due to the increasing use of these methods they are more practical and faster with a lower cost and time. According to them, there are various softwares and applications for processing and modeling the data. Since the study of lead and zinc deposits is considered, these deposits are generally scattered on the basis of objective evidence and the results of geological surveys in the region. Therefor the best geophysics study is to measure polarization and measure electrical resistance. The area of exploration Takht Pey is located on Shahrood to Gorgan road (toskestan road). 30 km pass the main road, passing Farahzad village, entering the sub-side of the road (north of the region) and within 7 km. This area is located 3.5 km east of the Pichamto Mining Area and 6 km northeast of Tash and Mojen mining area, so far no exploration geophysical operations have been carried out. The weather in the studied area is moderate to cold mountainous, and is usually covered by snow for nearly four months and even in some cases up to two seasons. However, in low-level and flatter areas the weather is moderate. The studied mineral deposits are mainly lead and zinc. The storage of lead in the Tash and Mojen area is often sulfuric and in the form of Galena mineral that part of the deposit near the surface of the earth due to alteration has transformed cerusite and in very rare cases to mineral anklizite. But in general, Galena resists alteration to a large extent. Therefore, despite the surface alteration, internal parts have remained intact. Mineralization in this area is mostly within the limestone and dolomite of the Lar Formation, which is concentrated in the reefs, the joint zones or the reefs, and in the changes of lead facies. This indicates the control and concentration of mineral deposits to the degree of changes in mextamorphism associated with folding and rolling. These deposits vary in size from 10 cm to 50 cm and even one meter in length. Due to the ability of dipole-dipole array in reducing the effect of electromagnetic coupling and its good resolution, the perceptions with this arrangement and in three profiles with the ABEM SAS 4000 geo-electric device have been performed. Then, two dimensional smooth modeling and parameters with topographic corrections in two-dimensional quasi-sections using Res2Dinv software were conducted. The maximum depth of survey was 60 meters in relation to the topography of the area and the device used.
Keywords:
#inducted polarization #Electrical resistivity #Lead&Zinc deposits #lenz shape mineralization #dipole-dipole array #Takht pey #Tash #Shahrood. Link
Keeping place: Central Library of Shahrood University
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