Volume 10, Issue 2 (Autumn & Winter 2024)
KJES 2024, 10(2): 557-587 |
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Ghoraeian F, Nozaem R, Rezaei S, Rajabi A, Taghavi A. Evaluation of spatial correlation of alteration with fault zones using remote sensing methods, case study of Indes-Tafarsh and Talkhab fault zones in Markazi Province. KJES 2024; 10 (2) :557-587
URL: http://gnf.khu.ac.ir/article-1-2930-en.html
URL: http://gnf.khu.ac.ir/article-1-2930-en.html
1- University of Tehran
2- University of Tehran ,nozaem@ut.ac.ir
3- Ferdowsi University of Mashhad
4- Geological Survey and Mineral Explorations Organization of Iran
2- University of Tehran ,
3- Ferdowsi University of Mashhad
4- Geological Survey and Mineral Explorations Organization of Iran
Abstract: (132 Views)
The Aster sensor has a unique ability to map mineral areas, which can be referred to as the ability to distinguish different types of rocks and highlight alterations in geological studies. The spectral and spatial resolution of the bands of this sensor has enabled geologists to use the Aster sensor well in studies of minerals that have outcrops and also highlight alterations. Useful studies have been conducted in the field of mapping mineral areas with outcrops, which are difficult to access and perform routine geological mapping operations in the desert field due to the presence of rugged mountains. In order to highlight alterations using the SWIR bands of the Aster sensor and image processing methods, several studies have been recorded. In this study, the remote sensing method was used for highlighting alterations for a wide area between the Indus faults in the east of the study area and the Talkhab faults in the west of the study area, and phase fusion was used, which made the size of the study area unique. In this study, two Aster images and the band ratio method, principal component analysis, and spectral angle mapper were used to determine alteration zones. The remote sensing studies conducted in the area resulted in the identification and differentiation of various types of alterations, as well as faults and fractures, which correspond with the geological map of the region. The two methods of band ratio and principal component analysis demonstrate higher accuracy compared to other methods employed in this research. Studies have shown that the Indes, Tafresh, and Talkhab faults, as the main structures of the region, play a key role in controlling and distributing hydrothermal alterations. These faults have created alteration zones along their length by creating pathways for the movement of hydrothermal fluids. In particular, the Indus fault, as one of the main faults in the region, has a significant impact on the distribution of alterations. By creating numerous fractures and joints, this fault has provided suitable conditions for the infiltration of hydrothermal fluids and the formation of alteration minerals. The relationship between faults and the ascent of hydrothermal fluids significantly affects mineral and geological alterations. Faults can create facilitating pathways for the movement of hydrothermal fluids. In general, the interaction between faults and hydrothermal fluidsleads to the formation of extensive alterations and the formation of new mineral resources.
Type of Study: Original Research |
Subject:
Tectonics
Received: 2024/10/25 | Accepted: 2024/12/13 | Published: 2024/12/28
Received: 2024/10/25 | Accepted: 2024/12/13 | Published: 2024/12/28
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