Staff View: Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran

Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran

This study investigates the application of spectral image processing methods to ASTER data for mapping hydrothermal alteration zones associated with porphyry copper mineralization and related host rock. The study area is located in the southeastern segment of the Urumieh-Dokhtar Volcanic Belt of Ira...

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Main Authors:	Pour, A. B., Hashim, M.
Format:	Article
Published:	Elsevier 2012
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/47072/ https://www.sciencedirect.com/science/article/pii/S0273117711007885?via%3Dihub
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spelling	my.utm.470722018-10-14T08:21:41Z http://eprints.utm.my/id/eprint/47072/ Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran Pour, A. B. Hashim, M. QC Physics This study investigates the application of spectral image processing methods to ASTER data for mapping hydrothermal alteration zones associated with porphyry copper mineralization and related host rock. The study area is located in the southeastern segment of the Urumieh-Dokhtar Volcanic Belt of Iran. This area has been selected because it is a potential zone for exploration of new porphyry copper deposits. Spectral transform approaches, namely principal component analysis, band ratio and minimum noise fraction were used for mapping hydrothermally altered rocks and lithological units at regional scale. Spectral mapping methods, including spectral angle mapper, linear spectral unmixing, matched filtering and mixture tuned matched filtering were applied to differentiate hydrothermal alteration zones associated with porphyry copper mineralization such as phyllic, argillic and propylitic mineral assemblages. Spectral transform methods enhanced hydrothermally altered rocks associated with the known porphyry copper deposits and new identified prospects using shortwave infrared (SWIR) bands of ASTER. These methods showed the discrimination of quartz rich igneous rocks from the magmatic background and the boundary between igneous and sedimentary rocks using the thermal infrared (TIR) bands of ASTER at regional scale. Spectral mapping methods distinguished the sericitically- and argillically-altered rocks (the phyllic and argillic alteration zones) that surrounded by discontinuous to extensive zones of propylitized rocks (the propylitic alteration zone) using SWIR bands of ASTER at both regional and district scales. Linear spectral unmixing method can be best suited for distinguishing specific high economic-potential hydrothermal alteration zone (the phyllic zone) and mineral assemblages using SWIR bands of ASTER. Results have proven to be effective, and in accordance with the results of field surveying, spectral reflectance measurements and X-ray diffraction (XRD) analysis. In conclusion, the image processing methods used can provide cost-effective information to discover possible locations of porphyry copper and epithermal gold mineralization prior to detailed and costly ground investigations. The extraction of spectral information from ASTER data can produce comprehensive and accurate information for copper and gold resource investigations around the world, including those yet to be discovered. Elsevier 2012 Article PeerReviewed Pour, A. B. and Hashim, M. (2012) Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran. Advances In Space Research, 49 (4). pp. 753-769. ISSN 0273-1177 https://www.sciencedirect.com/science/article/pii/S0273117711007885?via%3Dihub DOI:10.1016/j.asr.2011.11.028
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	QC Physics
spellingShingle	QC Physics Pour, A. B. Hashim, M. Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran
description	This study investigates the application of spectral image processing methods to ASTER data for mapping hydrothermal alteration zones associated with porphyry copper mineralization and related host rock. The study area is located in the southeastern segment of the Urumieh-Dokhtar Volcanic Belt of Iran. This area has been selected because it is a potential zone for exploration of new porphyry copper deposits. Spectral transform approaches, namely principal component analysis, band ratio and minimum noise fraction were used for mapping hydrothermally altered rocks and lithological units at regional scale. Spectral mapping methods, including spectral angle mapper, linear spectral unmixing, matched filtering and mixture tuned matched filtering were applied to differentiate hydrothermal alteration zones associated with porphyry copper mineralization such as phyllic, argillic and propylitic mineral assemblages. Spectral transform methods enhanced hydrothermally altered rocks associated with the known porphyry copper deposits and new identified prospects using shortwave infrared (SWIR) bands of ASTER. These methods showed the discrimination of quartz rich igneous rocks from the magmatic background and the boundary between igneous and sedimentary rocks using the thermal infrared (TIR) bands of ASTER at regional scale. Spectral mapping methods distinguished the sericitically- and argillically-altered rocks (the phyllic and argillic alteration zones) that surrounded by discontinuous to extensive zones of propylitized rocks (the propylitic alteration zone) using SWIR bands of ASTER at both regional and district scales. Linear spectral unmixing method can be best suited for distinguishing specific high economic-potential hydrothermal alteration zone (the phyllic zone) and mineral assemblages using SWIR bands of ASTER. Results have proven to be effective, and in accordance with the results of field surveying, spectral reflectance measurements and X-ray diffraction (XRD) analysis. In conclusion, the image processing methods used can provide cost-effective information to discover possible locations of porphyry copper and epithermal gold mineralization prior to detailed and costly ground investigations. The extraction of spectral information from ASTER data can produce comprehensive and accurate information for copper and gold resource investigations around the world, including those yet to be discovered.
format	Article
author	Pour, A. B. Hashim, M.
author_facet	Pour, A. B. Hashim, M.
author_sort	Pour, A. B.
title	Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran
title_short	Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran
title_full	Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran
title_fullStr	Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran
title_full_unstemmed	Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran
title_sort	identifying areas of high economic-potential copper mineralization using aster data in the urumieh-dokhtar volcanic belt, iran
publisher	Elsevier
publishDate	2012
url	http://eprints.utm.my/id/eprint/47072/ https://www.sciencedirect.com/science/article/pii/S0273117711007885?via%3Dihub
_version_	1643652226335375360
score	13.211869

Identifying areas of high economic-potential copper mineralization using ASTER data in the urumieh-dokhtar volcanic belt, Iran

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