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Open Access Article

9 pages 865 KB

Structural controls mineralization in strike-slip fault terminals, case study: Kaybarkuh region in East of Iran

Vahid Khademi, Mahmoud Reza Heyhat, Mohammad Mahdi Khatib, Mohammad Hossein Zarrinkoub, Hossein Hadizadeh Khader

World Journal of Geomatics and Geosciences 3(1); 10.31586/wjgg.2023.695 - August 04, 2023

1106 views 228 downloads

Abstract

In this study, we have investigated the status of faults in terms of precession and subsequence, and their relationship with vein mineralization in Kaybarkuh intrusive body in East of Iran. At least, ... Read more

Figure 1. A. GPS horizontal velocities in Eurasia-fixed reference frame for the period 1999–2001 showing the movement of Iran block (after [9] modified). B. Location of study area on Tectonic map of Iran with focal mechanism of DB and Abiz faults near the area (after [10] and [11] modified). C. Geological setting of the study area (after [12] modified).

Figure 2. The vertical dykes, mainly spreaded with an East - West trend, reflect a stretch phase with a North - South orientation at the beginning of Eocene and shortly after the formation of the Kaybarkuh body.

Figure 3. Band combination 1/3, 4/7 and 6/4 on Aster satellite image. Yellow and brown colors show the altered units [16].

Figure 4. A, B. The sequence of shear structures formation is indicated by brown, black, and yellow colors respectively. C. Copper mineralization on the strike-slip fault surface with the tension evidence. D. Couple of strike-slip faults with an angle of about 70 degrees.

Figure 5. The map of main faults which are divided into three generations (G1, G2, and G3) based on field and remote-sensing evidence. Blocks with dimensions of 3 km show the density of lineaments including dykes and minor faults based on total length.

Figure 6. The general trend of main faults and lineaments in blocks with dimensions of 3 km.

Figure 7. The stress orientation in two time periods according to the observed structures is shown on a Landsat true color (4-2-1) band combination of kaybarkuh region and surrounding.

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Open Access Article

17 pages 2345 KB

An Application of Remote Sensing Imagery for Geological Lineaments Extraction over Kaybarkuh Region in East of Iran

V. Khademi, M. R. Heyhat, A. Forghani, M. M. Khatib, M. H. Zarrinkoub, H. Hadizadeh Khader

World Journal of Geomatics and Geosciences 1(1); 10.31586/wjgg.2021.168 - December 17, 2021

1528 views 394 downloads 2 citations

Abstract

Kaybarkuh (Mount Kaybar) consists of intrusive igneous bodies with two age periods, located in North of Dasht-e-Bayaz left-lateral fault terminal. The spatial and structural analysis of fractures and ... Read more

Figure 1. a. Location of study area on map of Iran. b. Geological setting of the study area (Modified from 1:100,000 Geological map of Zouzan, 2005).

Figure 2. Extraction process of lineaments from drainage network using DEM image. a. Normal elevation map. b. Flow direction. c. Flow accumulation. d. Conditional raster. e. Drainage polylines resulted from raster. f. clipped and segmented polylines.

Figure 3. Automatically extracted lineaments on: a. Gram-Schmidt sharpened true color image, and b. PCI Geomatics processed image.

Figure 4. a. Visually extracted lineaments on Sentinel-2 (12-4-2) image, b. Hill shaded image with 10° azi-muth, c. Hill shaded image with 100° azimuth, d. Hill shaded image with 230° azimuth.

Figure 5. Flowchart of lineament extraction.

Figure 6. Plot of lineaments extracted by three methods on PCI Geomatics processed image.

Figure 7. Statistical information of lineaments based on length and abundance for: a. DEM data, b. Automatic extraction, c. Visual extraction, and d. Fault network of the area.

Figure 8. Comparison of lineaments resulted from: a. DEM data, b. Automatic extraction, c. Visual extraction, and d. Fault network of the area, with related rose diagrams based on lineament trends.

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