Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/119283
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Type: Journal article
Title: Identification of new base metal mineralization in Kumaon Himalaya, India, using hyperspectral remote sensing and hydrothermal alteration
Author: Govil, H.
Gill, N.
Rajendran, S.
Santosh, M.
Kumar, S.
Citation: Ore Geology Reviews, 2018; 92:271-283
Publisher: Elevier
Issue Date: 2018
ISSN: 0169-1368
1872-7360
Statement of
Responsibility: 
H. Govil, N. Gill, S. Rajendran, M. Santosh, S. Kumar
Abstract: Economic mineral deposits are commonly associated with zones of intense hydrothermal alteration. Space borne hyperspectral remote sensing is one of the recent techniques that enable the identification of hydrothermally altered and weathered minerals. In this study, we identified hydrothermally altered and weathered minerals of a gossanised outcrop rich in base metal mineralization in parts of the Kumaon Himalaya, India using an EO-1 Hyperion (hyperspectral) satellite data. Spectral Angle Mapper classification method was used to map the different altered/weathered minerals within the study area. The method identified the occurrence of dolomite and dolomite with chlorite minerals from the Hyperion data. The finding was verified in the field and confirmed through laboratory analyses. Representative samples measured for spectral absorption characters, reflected and transmitted petrography, X-ray diffraction and ICP-MS analyses confirmed the occurrence of Ag, Cu, Fe, Pb, Zn, As, and Sb base metal rich elements in the Thalkedar limestone. Our study recommends the technique to the map base metals and hydrothermally altered minerals in the other parts of Thalkedar limestone of Kumaon Himalaya and similar region of the world. The study is an important case for formulating exploration strategies in terrenes with rugged topography and dense vegetation.
Keywords: Base metal mineralization; hyperspectral remote sensing; hydrothermal alteration; spectroscopy; EO-1 Hyperion
Rights: © 2017 Elsevier B.V. All rights reserved.
RMID: 0030078537
DOI: 10.1016/j.oregeorev.2017.11.023
Appears in Collections:Geology & Geophysics publications

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