A geological reconnaissance survey is being carried out using remote sensing multispectral data Which set of the two band data of the following is most appropriate for mapping limonite bearing zones Gate geology and geophysics 2014

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A geological reconnaissance survey is being carried out using remote sensing multispectral data. Which set of the two band data of the following is most appropriate for mapping limonite bearing zones? (-Gate geology and geophysics 2014)

(A) Near infrared band and Thermal infrared band image data 
(B) Blue band and Red band image data 
(C) Shortwave infrared band and Thermal infrared image data 
(D) Thermal infrared band and X-band radar image data


By:Aparna-Dasgupta

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(B) Blue band and Red band image data 

Limonite is an iron ore consisting of a mixture of hydrated iron(III) oxide-hydroxides in varying composition. The generic formula is frequently written as FeO(OH)·nH2O, although this is not entirely accurate as the ratio of oxide to hydroxide can vary quite widely. Limonite is one of the two principal iron ores, the other being hematite, and has been mined for the production of iron since at least 2500 BCE
A multispectral image is one that captures image data within specific wavelength ranges across the electromagnetic spectrum

Amogh

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