首页|Integrating aeromagnetic data and Landsat-8 imagery for detection of post-accretionary shear zones controlling hydrothermal alterations: The Allaqi-Heiani Suture zone, South Eastern Desert, Egypt

Integrating aeromagnetic data and Landsat-8 imagery for detection of post-accretionary shear zones controlling hydrothermal alterations: The Allaqi-Heiani Suture zone, South Eastern Desert, Egypt

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  • Elsevier
The Arabian-Nubian Shield (ANS) underwent a regional carbonation event with CO_2 fluxes derived from the mantle and circulated along post-accretionary shear zones, thus affecting the redistribution of gold mineralization. Formerly, the analyses of remotely-sensed data have suggested regions of gold mineralization linked to the post-accretionary structured framework, but the results were insufficient for detailed prospecting in the ANS. In this research, aeromagnetic data and Landsat-8 imagery were integrated for delineating new high potential zones of gold mineralization in the Allaqi-Heiani Suture (AHS) zone, the ANS, South Eastern Desert (SED) of Egypt. Aeromagnetic data were enhanced using the Center for exploration targeting (CET) grid enhancement technique to detect the main structures that control hydrothermal alterations in the study area. Principal Component Analysis (PCA) technique and ratios of spectral bands were applied to Landsat-8 data for mapping zones of hydrothermal alteration associated with gold mineralization. The traced structural elements from RTP, CET and Landsat-8 maps were statistically plotted and interpreted using rose diagrams. These diagrams indicated that the NW and NE trends are the most dominant in the RTP map and that the intersection zones obtained from the CET analysis are aligned along the NW-oriented trend. While the NNW, WNW and NE trends were the most dominant ones in Landsat maps. The integration of the results indicates several new high potential zones of gold and Cu/Ni mineralization types, which are mostly concentrated at the western part of the AHS zone. The hydrothermal alteration zones and associated gold mineralization are strongly linked to NW, NE, E-W and WNW trending lineaments. The approach used in this study can be applied to other parts of the ANS and other regions with similar geological conditions around the world.

Allaqi-Heiani Suture (AHS) zoneAeromagnetic dataCETLandsat-8 dataGold prospecting

Ahmed Mohammed Eldosouky、Haytham Sehsah、Sayed O. Elkhateeb、Amin Beiranvand Pour

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Geology Department, Faculty of Science, Suez University, Suez 43518, Egypt

Geology Department, Faculty of Science, Damietta University, New Damietta 34517, Egypt

Department of Geology, Faculty of Science, South Valley University, 83523 Qena, Egypt

Korea Polar Research Institute (KOPRI), Incheon, Republic of Korea ,Institute of Oceanography and Environment (INOS), Universiti Malaysia Terengganu (UMT), 21030 Kuala Nerus, Terengganu, Malaysia

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2020

10.1016/j.asr.2019.10.030

Advances in space research: The official journal of the Committee on Space Research

Advances in space research: The official journal of the Committee on Space Research

EIISTP
ISSN：0273-1177
年,卷(期)：2020.65(3)
  • 18
  • 105