The petrographic studies of zincian chromite rich ultramafic were carried out using LEICA DM RX at the Regional Petrology Laboratory,Geological Survey of India,Central Region,Nagpur,India.The silicate and oxide phases analyses were performed using a CAMECA SX-100 electron microprobe analyzer at the National Centre of Excellence in Geoscience Research(NCEGR),Geological Survey of India,Bangalore.The authors would like to express their sincere thanks to officials of the SEM,Palaeontology Laboratory,Geological Survey of India,Hyderabad and EPMA lab-oratory,NCEGR laboratory,Bangalore and the colleagues of GSI associated with exploration in the area.The authors also want to express their sincere thanks to Prof.Shoji Arai for discussion and critical comment to improve the manuscript in initial stage.The authors are thankful to Shri S.N.Mahapatro for his technical support.The authors acknowledge Geological Survey of India,Ministry of Mines,Government of India for funding the opportunity to work in this projects.Last but not the least the authors are thankful to Dr.Wubin Yang and anonymous reviewers for their critical review and constructive comments.The authors express sincere thanks to Dr.Binbin Wang,editor for providing opportunity and encouragement to submit the manuscript in the journal. （NCEGR）