• Rajendra M. Guruwadeyar
• Ajaykumar N. Asode
• A. Sreenivasa

The Nuggihalli Schist Belt (NSB) is well known for its repository of chromite and magnetite reefs, which extends from Arasikere in the north to Kempinkote in the south. Important chromite deposits are found across Byrapur, Bhaktharahalli, Tagadur and Jambur areas of NSB. In the present investigation, emphasis has been laid to study chromite ores of Tagadur area using Thermogravimetric analysis-Differential thermal analysis (TGA-DTA). It has been well established that TGA-DTA provides most significant data on the thermal nature and behaviour of the important mineral ores. Results of the study indicated that Endothermic peaks for Quartz, Olivine and Chromite (spinel) as 227.53-250.17ºC, 814.90ºC and 834.04ºC respectively. The temperature range 837.66 - 910.35ºC corresponds to conversion due to dehydroxylation of Olivine and Spinel. In the same way, at different ranges of temperature, due to dehydroxylation and oxidation, conversion takes place to form new minerals. The curves obtained in this study match with the standard curves reported for chromite ores. However, there are negligible variations in the values in some samples because of accessory minerals and gangue. Therefore, the study indicates presence of chromite and associated minerals such as Magnatite, Magnasite, Enstatite, Amphibole, Chlorite, Serpentine and Talc from the Tagadur area.

Chromite, Tagadur, Nuggihalli Schist Belt (NSB), DTA, TGA, Karnataka

"THERMAL ANALYSIS OF CHROMITE ORES OF TAGADUR AREA, NUGGIHALLI SCHIST BELT, KARNATAKA, INDIA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 5, page no.658-663, MAY-2018, Available :http://www.jetir.org/papers/JETIR1805852.pdf

"THERMAL ANALYSIS OF CHROMITE ORES OF TAGADUR AREA, NUGGIHALLI SCHIST BELT, KARNATAKA, INDIA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 5, page no. pp658-663, MAY-2018, Available at : http://www.jetir.org/papers/JETIR1805852.pdf