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Author ORCID Identifier

Meaza Girmay Bogale: 0009-0003-9466-7884

Elias Mamushet Woldeyohanis: 0009-0002-6159-1003

Abstract

Archean greenstone belts are well known for their ore deposits, diverse lithostratigraphy, and well-preserved evidence from the early Earth. The Northern Coongan Greenstone Belt is an Archean greenstone belt that is part of the Eastern Pilbara Craton of Western Australia. The rock units of this area have the potential to be sources of valuable mineral deposits, which could be economically beneficial for extraction. Studies have been conducted in the northern Coongan greenstone belt, mostly using geological field methods and geophysical interpretations, excluding remote sensing methods for mapping mineral indices. Therefore, this study aims at providing surface mineral distribution maps and delineating the possible indications of hydrothermal alterations using remote sensing imagery. ASTER image processing methods used in this study include band rationing, principal components analysis, decorrelation stretch, visual interpretation, and spectral angle mapper classification. Classification accuracy was assessed for quality confirmation, and the classified image was compared to the geological map as well as the field data. Results of the analysis provide different structural layering of the northern Coongan greenstone belt, minerals distribution map and delineate the prominent areas of hydrothermal alteration. In this study, the Duffer formation and the Salgash subgroup were delineated as hydrothermally altered units, and there is a probability of finding economic mineral deposits in these formations.

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Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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