TN1103 : Exploration of poly-mextallic ore deposits in north of Bardeskan area using modeling and interpretation of resistivity and induced polarization data
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2021
Authors:
[Author], Ali Reza Arab-Amiri[Supervisor], Abolghasem Kamkar Rouhani[Supervisor], [Advisor]
Abstarct: Nowadays, geophysical methods are widely used in the exploration of mextallic mineral deposits due to their acceptable results, low cost and high speed of implementation. Exploration activities take place on different scales, and ultimately, their focus is on areas that can potentially possess mineral deposits. The study area in the north of Kaboudan village is located in Bardeskan limit in Khorasan Razavi Province. Geologically, a significant part of the area is formed by Taknar Formation. Extensive outcrops of granodiorite and granite rocks in the west of the area as well as small outcrops of limestone, ultrabasic, tuff, andesite, radiolarite, Kerman conglomerate can be seen in the north of the area. In order to investigate the polymextallic deposits in the area, the geophysical resistivity and induction polarization (IP) methods using the rectangle electrode array in 5 rectangular zones, and also, the dipole-dipole electrode array along 9 survey lines were used in the area. The results of the electrical surveys using the rectangle array were investigated and therefore, the anomalous or conductive zones prone to mextallic mineralization were detected, and then, the resistivity and IP methods using the dipole-dipole array were performed on the recognized anomalous zones. To determine the resistivity and chargeability of the subsurface structures and interpretation of the results, the obtained data acquired using the dipole-dipole array were inverted using Res2Dinv software, and as a result, two-dimensional inverse modeling resistivity and chargeability cross sections were prepared and analyzed with the help of geological information. mextallic mineralized areas having high chargeability and low to medium resistivity values were identified that indicates the presence of sulfide and non-sulfide mextallic minerals in these areas. However, in some places, due to the silicification of mineralized areas, the resistivities of these areas somewhat increased. Considering the results of the IP and resistivity surveys in the area, zones 3 and 5 had higher mineralization potential than zones 2, 4, 7 and were considered the most important mineralization zones.in the area. Regarding the presence of schist rocks in zones 6 and 8, IP and resistivity anomalies were due to the presence of these schist rocks in the area although there was also the evidence of mineralization in these zones, however, these zones were not considered very important from mineralization point of view.
Keywords:
#Key words: Induced polarization (IP) #Electrical resistivity #Poly-mextallic deposits #Rectangle array #Dipole-dipole array #Bardeskan Keeping place: Central Library of Shahrood University
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