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Extraction of geological structural and alteration information and the prediction of metallogenic favorable locations in northeastern Jeddah, Saudi Arabia |
Honglin MA1,2, Weijie JIA1,3, Changliang FU1, Wei LI1 |
1. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China 2. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083,China 3. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Northeastern Jeddah area of Saudi Arabia is located in Africa-Arab metallogenic area, which is characterized by rich mineral resources, complex geological structure and magmatic hydrothermal activities, thus having well-developed polymetallic mineralization and tremendous metallogenic potential. For the purpose of further prospecting for polymetallic areas and delineating favorable targets, the authors used the Landsat8 images to interpret linear-ring structures in the whole study area, and employed the “principal component analysis-optimal density segmentation” method by using iron mineralization alteration anomaly to extract polymetallic deposits. Based on the comprehensive analysis, the authors studied the remote sensing image geological characteristics of 7 iron mineralization alteration zones in the study area and selected favorable metallogenic linear-ring structures to predict the favorable location of prospecting in the northeastern Jeddah area of Saudi Arabia. Three iron prospective areas were delineated. GF-2 and Google Earth images were used to verify the prediction of metallogenic favorable sites in northeastern Jeddah of Saudi Arabia. The results obtained further prove that the magmatic intrusion in the annular tectonic zone and the fracture junction are favorable places for metallogenesis in the study area. The results obtained by the authors could provide the reference for the further prospecting prediction in this region.
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Keywords
linear-ring structure
alteration anomaly
optimal density segmentation
prospecting prediction
northeastern Jeddah
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Issue Date: 30 August 2019
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