ESTIMATION OF GRANITE ROCKS FROM WEATHERED - OVERBURDEN ROCKS USING 2D ERI STUDIES IN AREAS OF VELLAKOVIL, KARUR DISTRICT, TAMILNADU
2014
The present study is an attempt to understand the application of 2D Electrical Resistivity Imaging (ERI) in granite mine at Vellakkovil, Karur District, Tamilnadu. The 2D ERI to map the hard and compact granite bodies from the overburden material in the mines area. The delineation of higher resistivity contrast with the low resistivity values of the weathered overburden was done to locate a suitable site for mining of granite at Vellakkovil. The surveys were carried out using CRM resistivity meter, multicore cable, multi electrodes with wenner array used. The collected resistivity data were interpreted using by Res2DINV software. The apparent reistivity value of the pseudosection is used for the interpretation of the survey. The range of apparent resistivity range from 5-60 Ohm.m is indicate weathered zone and the high quality of granite is occurring from 170-600 ohm.m.
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