Rani C

Department of Electrical Engineering

School of Electrical Engineering

Vellore Campus

Mandla V.R

Singh T.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Spatial distribution of altered minerals in the Gadag Schist Belt (GSB) of Karnataka, Southern India using hyperspectral remote sensing data

Geocarto International

Journal of the Geological Society of India

Performance of image classification on hyperspectral imagery for lithological mapping

Model Analyst's Toolkit User Guide, Version 7.1.0

Precambrian Research

Crustal root of the Eastern Dharwar Craton: Zircon U–Pb age and Lu–Hf isotopic evolution of the East Salem Block, southeast India

Ore Geology Reviews

Precambrian geodynamics and metallogeny of the Indian shield

AGU Reference Shelf Rock Physics & Phase Relations

Reflectance Spectra

This work illustrates the efficiency of field spectroscopy for rapid identification of minerals in ore body, alteration zone and host rocks. The adopted procedure involves collection of field spectra, their processing for noise, spectral matching and spectral un-mixing with selected library end-members. Average weighted spectral similarity and effective peak matching techniques were used to draw end-members from library. Constrained linear mixture modelling technique was used to convolve end-member spectra. Linear mixture model was optimized based on root mean square error between field- and modelled-spectra. Estimated minerals and their abundances were subsequently compared with conventional procedures such as petrography, X-ray diffraction and X-ray fluorescence for accuracy assessment. The mineralized zone is found to contain azurite, galena, chalcopyrite, bornite, molybdenite, marcacite, gahnite, hematite, goethite, anglesite and malachite. The alteration zone contains chlorite, kaolinite, actinolite and mica. These mineral assemblages correlate well with the petrographic measurements (R2 = 0.89). Subsequently, the bulk chemistry of field samples was compared with spectroscopically derived cumulative weighted mineral chemistry and found to correlate well (R2 = 0.91-0.98) at excellent statistical significance levels (90-99%). From this study, it is evident that field spectroscopy can be effectively used for rapid mineral identification and abundance estimation. © Indian Academy of Sciences.

Fulltext

Journal of Earth System Science

A field technique for rapid lithological discrimination and ore mineral identification: Results from Mamandur Polymetal Deposit, India

Journal	Geocarto International
Publisher	Informa UK Limited
ISSN	1010-6049
Open Access	0