TN943 : Investigation of Mineralization Potential of North of Chak-Chak Range in Yazd Province By Using Remote Sensing and Magnetometry Data
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2019
Authors:
Ali Akbar Aali [Author], HAMID AGHAJANI[Supervisor], Reza Ghavami-Riabi[Supervisor]
Abstarct: Aims: The purpose of this research is to find promising areas in the Chk-Chak area of Yazd province. The study range is in the latitude of 33 to 33 degrees north and longitude 54 to 55 degrees east. Methodology: In this study, were used the geological information in four maps of 100,000 populated areas in Yazd province, Landsat 7 and Sentinel 2 satellite aerial magnetic data and aerial magnetic data to provide effective laxyers for identifying promising areas. Lithic unit information laxyers, faults and lineaments, alteration and iron oxide, and deeper intrusive intrusions have been prepared using geological, remote sensing, and aerial geophysical data. These laxyers are integrated in GIS environment with fuzzy overlay and logic methods. A number of points have been harvested in a range by terrestrial magnetization after plotting promising mineralization zones. The extracted data were corrected and various maps were prepared and the most suitable mineralization sites were identified for the continuation of exploration activities. Results: baxsed on the findings of the study, the bond composition of 3.1, 4.3 and 5.7 ETM + zinc oxide zones, vegetation and alteration and clay minerals and clay compositions ratios of 11.12 and 4.11 And 4.2 Sentinel sensors clearly showed iron oxide, ferrous and alteration minerals and clay minerals. precise determination of rock units allowing mineralization potential, argillic and phyllic and propylitic alterations, zones containing iron and iron oxide minerals and faults and lineaments were made possible by using remote sensing data. In the processing of aeromagnetic data, the anomalous regions were better characterized by increasing the degree of curve fitting to a third degree level. Surface anomalies were better identified after applying vertical derivative filters to aeromagnetic data because the effect of large and deep anomalies had disappeared. The results of the analytical signal showed the presence of masses with multiple magnetic abnormalities, indicating the approximate position of the abnormal edges in the study area. The map obtained by applying Tilt filter, analytical signal as well as map derived by applying horizontal derivative filter in different directions, faults and lineaments. The fault laxyers and lineaments, rock units associated with mineralization, iron oxide, alteration and intrusive bodies were combined with two knowledge-baxsed methods of multi-class and fuzzy index overlap that identified the anomalous zones. The results of these two methods almost confirmed each other. The analysis of terrestrial magnetism data also revealed that the range has several peaks in the southwest and other peaks in the northeast after eliminating the effect of IGRF on the terrestrial magnetism data. These anomalies are consistent with igneous rock units (rhyolites) and fault faults. Conclusion: Promising anomalous ranges were obtained in the area by combining geological, telemetry and aeromagnetic exploration laxyers. Suitable areas for exploration were suggested baxsed on the results.
Keywords:
#Remote sensing data #Magnetometry #Data integration #GIS #Promising ranges. Link
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