Identification of alterations related to porphyry polymetallic mineralization in Qarah Gol area (Ardabil Province) using principal component analysis and spectral angle mapping

Document Type : Original Article

Authors

Abstract

Qarah Gol area is located in Ahar-Arasbaran metallurgical zone in Ardabil Province, Meshkinshahr city in Moradloo section. The oldest rock units in the study area are related to the Cenozoic (Eocene), which consists of volcanic breccia. In this area, microquartzdiorite have penetrated into volcanic and pyroclastic rocks and alteration and mineralization have taken place on a weak scale. The results of Aster image processing, using absorption bands and selection of the best ratio color composite (5 + 7.6, 9.8, 4.5) respectively for the detection of argillic, phyllic and propylitic alterations, as well as using techniques such as principal component analysis and spectral angle mapping indicate that associated alterations in the central part of this deposit is consistent with petrographic studies in Qarah Gol area. Field studies have shown that the results of Spectral Angle Mapper (SAM) have performed better than the principal component analysis (PCA) in the detection of alterations.
 

Keywords


[1] Rowan L. C., Schmidt R., Mars J. C., “Distribution of Hydrothermally Altered rocks in the Reko Diq”, Pakistan Mineralized Area Based on Spectral Analysis of ASTER Data. Remote Sensing of Environment, 104(1) (2006) 74-87.

[2] Tangestani M. H., Moore F., “porphyry copper alteration mapping in Meiduk area”, Kerman, Iran. International journal of remote Sensing 23(22) (2002) 4815-4825.

[3] Srivastav S.K., A.Bhattacharya M.V., Kamaraju V., Sreenivasa G., Reddy List F.K., Burger H., “Remote sensing and GIS for locating favourable zones of lead-zinc-copper mineralization in RajpuraDariba area”,. Rajasthan, India. International Journal of Remote Sensing, 21(17) (2000) 3253-3267.

[4] Sengupta A., Adhikari M.D., Maiti S., Maiti S.K., Mahanta P., Bhaumick S., “Identification and mapping of high-potential iron ore alteration zone across Joda”, Odisha using ASTER and EO-1 hyperion data.Spatial science 64 (2018) 491-514.

[5] Mazhari N., Malekzadeh Shafaroudi A., Ghaderi M., “Detecting and mapping different types of iron mineralization in Sangan mining region, NE Iran, using satellite image and airborne geophysical data.Geosciences 21 (2017) 137-148.

[6] Gopinathan P., Parthiban S., Magendran T., Ayad M., Fadhil Al-Quraishi D., Ashok K., Pradeep K., “Mapping of ferric (Fe3+) and ferrous (Fe2+) iron oxides distribution using band ratio techniques with ASTER data and geochemistry of Kanjamalai and Godumalai, Tamil Nadu”, south India. remote Sensing Applications 18 (2020) 100-306.

[7] Khaleghi M., Ranjbar H., Abedini A., Kalagari A.A., “Synergetic use of the sentinel-2, aster, and lansat-8 data for hydrothermal alteration and iron oxide minerals mapping in a mine scale”, Acta Geodyn. Geomater 17 (2020) 311-328.

[8] El-Desoky H.M., Soliman N., Heikal M.A., Abdel-Rahman A.M., “Mapping hydrothermal alteration zones using ASTER images in the Arabian–Nubian Shield: A case study of the northwestern Allaqi District”, South Eastern Desert, Egypt. Asian Earth Sciences 5 (2020).

[9] Azizi H., Jahangiri A., “Cretaceous subduction-related volcanism in the northern Sanandaj-Sirjan Zone”, Iran. J. Geode, 45(4-5) (2008) 178-190.

[10] Azizi H., Moinevaziri H., “Review of the tectonic setting of Cretaceous to Quaternary volcanism in northwestern Iran”, J. Geodyn, 47(4) (2009) 167-179.

[11] Sahandi M. R., “Map of structural zones of Iran”, Geological Survey and Mineral Exploration Organization (2006).

[12] van der Werff H., van der Meer F. D., “Sentinel-2A MSI and Landsat 8 OLI provide data continuity for geological remote sensing”, Remote Sensing 8(11) (2016) 883.

[13] Galva L. S., Almeida-Filho R., Vitorello I., “Spectral discrimination of hydrothermally altered Materials”, Using ASTER short-wave infrared bands. Applied Earth Observation and Geoinformation, Elsevier 7(2) (2005) 107-114.

[14] Bennett S. A., Atkinson W., Kruse W., “Use of Thematic Mapper imagery to identify mineralization in the Santa Teresa district, Sonara, Mexico”, International Geology Review, 35(11): (1993)1009–1029.

[15] Lowell J.D., Guilbert J.M., “Lateral and vertical alteration-mineralization zoning in porphyry ore deposits: economic geology and the bulletin of the society”, economic geologists 65 (4) (1970) 373–408.

[16] Sillitoe R.H., “Gold- rich porphyry deposits: Descriptive and genetic models and their role in exploration and discovery SEG”, Reviews 13 (2000)315-345.