Journal of Geological Remote Sensing

Enhancement of hydrothermal alteration zones and their relationship with faults using satellite images in the Talahoueieh polymetallic deposit, north of Bam

Document Type : Original Article

Authors

Jalal Hassanshahi
Majid Ghaderi
Hossein-Ali Tajeddin

Department of Economic Geology, Tarbiat Modares University

https://doi.org/10.48306/jgrs.2025.535382.1019
Abstract
The Talahoueieh Cu-(Pb-Zn-Ag-Fe) deposit is located in the southeastern section of the Urumieh-Dokhtar magmatic belt, 25 km north of Bam. The study area is composed of volcanic, sedimentary, and pyroclastic units; the main structures in the area trend NNW-SSE and NW-SE. The hydrothermal alteration has developed along the main fractures. Argillic, propylitic, and advanced argillic alteration features are widespread in the region. ASTER and Sentinel-2 data were used to highlight hydrothermal alteration zones and geological structures, respectively. Selective Principal Component Analysis (PCA) and Relative Band Depth (RBD) algorithms in ENVI software were utilized to highlight hydrothermal alteration zones, while Geomatica 2016 software was employed to enhance existing geological structures. The clay alteration zones (argillic, phyllic, and advanced argillic) were prominent in one group due to the low spectral resolution of ASTER in the SWIR spectral range and are recognizable in yellow, and the propylitic alteration zone in light green in the image. Using the Sentinel-2 band 4 and field surveys, structures were extracted, which generally trend NW-SE. According to the collected data, there is a direct relationship between geological structures, alteration, and mineralization in the Talahoueieh area.

Keywords

ASTER
Sentinel-2
band ratios
hydrothermal alteration
faults
Talahoueieh deposit

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Journal of Geological Remote Sensing
Volume 2, Issue 1 - Serial Number 2
December 2024
Pages 78-95

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