TN956 : Modeling and interpretation of resistivity and induced polarization data in the area of asemano copper mine, mayamey city, Semnan Province
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2020
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Abstarct: One of the most important steps in exploring mineral resources is to identify target areas. Geophysical methods are indirect and non- destructive methods and they have a high efficiency that works with the aim of searching for hidden reserves by measuring a physical parameter at the level and compared to direct exploration methods such as drilling, they have lower cost and higher speed. Asemano mineral area is located 25 km east of Mayamey city in Semnan province. The host rocks are Eocene volcanic rocks, which are geologically located in the western part of the Sabzevar zone and in the Trud- Abbasabad zone himalayas. According to geological studies, the Andesite igneous and sedimentary limestone rocks of the Eocene period cover most of the region. Due to the geological conditions and previous studies, resistivity (ReS) methods and induced polarization (IP) are suitable methods for studying the geophysical of copper sulfide mineralization. IP is one of the important methods in the exploration of sulfide and mextal ores, especially scattered sulfides, which along with the resistivity method has been used asa complementary method in these studies. Thesestudies cover a wide range, with 3266 IP/ReS measurements along 13 profiles and with dipole- dipole and pole- dipole electrode arrays in the northern and southern phases of the Asemano mine area. The results of geophysical perceptions have been modeled and interpreted by RES2DINV software. baxsed on the results of data modeling and interpretation, positions with high IP values and moderate to high resistivity were identified as promising mineralization situations. Because with three- dimensional interpretation, more accurate and reliable answers can be obtained, the three- dimensional sections of the southern phase are also modeled using RES3DINV software and the results are displayed using VOXLER software.According to these results, in the northern phase of the mine, despite sedimentary rocks and low resistivity, there will be no suitable geological conditions for copper mining. Only in line with profile number 5, a promising drilling proposal has been made. Unlike the northern phase, more anomalies were detected in the southern phase, which, despite Andesite igneous rocks having high resistivity, had high IP values in the same areas, creating favorable conditions for sulfide copper mineralization. baxsed on this research, a number of drilling points in profiles 1 to 4 have been proposed. Profile number 1 has a higher priority than other profile. Also, in profile 12, the minimum drilling depth with a depth of 40 meters and profile number 2 with a drilling depth of 50 meters can be suggested as promising areas for drilling. The advantages of this research are the use of cross- sectional profiles in order to increase the reliability of the data, the long length of the profiles, the use of unbreakable and very effective polarizing electrodes and high study depth and the use of combined dipole data collection methods, pointed dipole and pole- dipole.
Keywords:
#Asemano #electrical resistivity #induced polarization #copper mineralization #inverse modeling #dipole- dipole electrode array #pole- dipole electrode array Keeping place: Central Library of Shahrood University
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