Volume 92, Issue 6 pp. 2382-2394
Original Article
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Application of Geochemistry and VNIR Spectroscopy in Mapping Heavy Metal Pollution of Stream Sediments in the Takab Mining Area, NW of Iran

Parisa PIROOZFAR

Corresponding Author

Parisa PIROOZFAR

Department of Geology, Faculty of Sciences, Urmia University, Urmia, Iran

Corresponding author. E-mail: [email protected]Search for more papers by this author
Samad ALIPOUR

Samad ALIPOUR

Department of Geology, Faculty of Sciences, Urmia University, Urmia, Iran

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Soroush MODABBERI

Soroush MODABBERI

School of Geology, University of Tehran, Tehran, Iran

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David COHEN

David COHEN

School of Biological, Earth and Environmental Sciences, New South Wales University, Sydney, Australia

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First published: 27 December 2018

About the first author: Parisa PIROOZFAR, female, born in 1978 in Tehran city, Iran; PhD; expert of geochemical exploration department, Geological Survey of Iran (GSI); She is now interested in the study of environmental geochemistry and exploration geochemistry; Email: [email protected].

Abstract

This study considered the possibility of using visible and near infrared (VNIR) spectral absorption feature parameters (SAFPs) in predicting the concentration and mapping the distribution of heavy metals in sediments of the Takab area. In total, 60 sediment samples were collected along main streams draining from the mining districts and tailing sites, in order to measure the concentration of As, Co, V, Cu, Cr, Ni, Hg, Ti, Pb and Zn and the reflectance spectra (350–2500 nm). The quantitative relationship between SAFPs (Depth500nm, R610/500nm, R1344/778nm, Area500nm, Depth2200nm, Area2200nm, Asym2200nm) and geochemical data were assessed using stepwise multiple linear regression (SMLR) and enter multiple linear regression (EMLR) methods. The results showed a strong negative correlation between Ni and Cr with Area2200nm, a significant positive correlation between As and Asym2200nm, Ni and Co with Depth2200nm, as well as Co, V and total values with Depth500nm. The EMLR method eventuated in a significant prediction result for Ni, Cr, Co and As concentrations based on spectral parameters, whereas the prediction for Zn, V and total value was relatively weak. The spatial distribution pattern of geochemical data showed that mining activities, along with the natural weathering of base metal occurrences and rock units, has caused high concentrations of heavy metals in sediments of the Sarough River tributaries.

 

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