GSI talks about its find of PGE (Platinum group elements) in Keonjhar district of Odisha
Keonjhar, Platinum August 14th. 2011, 11:19amFollowing is an excerpt from a report in Hindu.
The Geological Survey of India (GSI) has found Platinum Group of Elements (PGE) in the Baula-Nuasahi ultramafic complex in Orissa.
“We, in collaboration with the Orissa Mining Corporation [OMC], are studying the feasibility of mining of PGE in the area. There are some encouraging signs,” said GSI Director-General A. Sundaramoorthy.
… The PGE comprises a family of six greyish to silver white metals — platinum, palladium, iridium, rhodium, osmium and ruthenium. They have attracted enormous interest from explorers all over the world due to their rarity, high economic value, growing demand in jewellery, pharmaceutical, telecommunication and hi-tech application in fuel cell technology.
“The Baula-Nuasahi ultramafic complex is the only proven PGE deposit in the country with an estimated resource of 14.2 million tonnes. This is confined to the active chromite mines,” GSI sources said.
The GSI started its collaboration with the OMC in 2010. After one year of study, scientists are elated about the prospects of development of this mineral.
Sitampundi in Tamil Nadu is another place where the GSI has got proof of PGE presence. …
Following is from a paper by GSI titled "Platinum in Baula – Nuasahi Ultramafic Complex."
Baulaâ€Nuasahi ultramafic complex (Lat. 210 15’ – 21020’: Long 860 18”â€860 20’) in Kendujhar district, Orissa is a NWâ€SE trending , ~3 km long arcuate belt occurring ~170 km northeast of Bhubaneswar (Fig.1). It comprises of variants of ultramafic suite including orthopyroxenite, dunite, chromitite, peridotite, websterite and harzburgite hosted within gabbro and shows steep easterly dip. The maficâ€ultramafic sequence is intrusive to the supracrustals (Badampaharâ€Gorumahishani Belt) of the Archaean Singhbhum craton. The supracrustals named here as Hadgarh Group comprises mainly a clastic dominated sequence with minor basic volcanics, volcaniclastics and semiplelite and occur as an arcuate belt within the granitemigmatite milieu (Singhbhum Granite).
Within the Baula ultramafic complex, the interface between the ultramafic and the mafic unit (gabbro) in its eastern border, is marked by a prominent magmatic breccia zone ranging in width between 1 m to 40m and with a strike length of >2 km. Although incidence of platinumgroup elements (PGE) in the belt was recorded by Banerjee (1966), Roy (1970) and Chakraborty (1972), PGE rich zones containing >1 ppm (Pt+Pd) was reported by the AMSE wing of the Geological Survey of India (Thiagarajan et al. 1989). Subsequently the mineralized units confined to the brecciated Gangaâ€Shankar chromite lode were identified (Nanda et al. 1996, Patra & Mukherjee 1996). A collaborative programme undertaken by BRGM, France and Geological Survey of India (1996â€99) confirmed the PGE potential of the Baula sector (Augé et al. 1999). Two types of mineralization, viz. magmatic and hydrothermal origin, both linked to the intrusion of a gabbro into the ultramafic complex are reported. Detailed exploration for PGE established a possible resource of 7.7 million tones Pt+Pd ore with average content of 1.5 g/t at 0.5g/t cut off.