Corundum Deposits in Chhattisgarh
In Chhattisgarh corundum occurs in Bhopalpatnam and Sukma areas of Dantewara/Bijapur distrticts. Minor occurrences are also reported from Deobhog area of Raipur district. Total 48 tonne of corundum has been estimated in the State.
1. Kuchnoor - (80o24'13" : 18o51'0", Toposheet no. 65 B/5)
Kuchnoor is situated 2 km. NW of Bhopalpatnam. Corundum bearing area has been invented in detailed by D.G.M. and divided into 3 blocks namely Block-I, Block-II and Block-III. The host rock of corundum in this area is biotite granite gneisses.
The crystal of corundum found in Block-I are ruby red in colour with some translucent to faintly transparent crystals. Corundum granis obtained from Block-II are opaque, mostly of honey brown, earthy brown, yellowish or purplish colour. Crystal range is size from a few mm. to over 3 cm. Corundum recovered from Dobegutta hill (Block-III) is dark brown with a bit of bluish tinge and has developed micaceous partings along the basal pinacoid of the crystal. They are therefore, more platy as compared to the elongated crystals from two Blocks. Corundum of Block-II & III are mostly of industrial variety.
The corundum occurrence in the area is restricted to only lateral extension.Minieralisation does not persist in depth. Estimated reserve of Ruby corundum in Block-I, including industrial and semi-precious varieties is 98.642 kg. Estimated reserve of industrial variety corundum in Block-II and Block-III are 24.0334 tonnes. Additional 5.69 tonnes reserves of corundum is also proved by directorate in Kuchnoor area in 1997-99.
Earlier, The State Mining Corporation Ltd was engaged in the exploitation of corundum in this area.
2. Ulloor - (80o 22' 15" : 18o 54' 00", Toposheet No. 65 B/5)
Primary and placer both type of corundum reported in the village Ulloor. Placer corundum is encountered in Pedakonta nala. Primary corundum found at the depth of 3.85 m. in biotite granite gneiss. The corundum is pinkish violet in colour, barrel shaped with perfect basal pinacoid and hexagonal prism. On the pitting work 0.0225 tonnes reserves are estimated in the area. It falls partly in forest and revenue area and partly in private land.
3. Dampaya area - (80o 29' 15" : 18o 50' 15", Toposheet No. 65 B/5)
In this area, pieces of corundum were recovered from nala section. Corundum is pinkish yellow, translucent, hexagonal barrel shaped. Country rock of the area is granite gneiss. It comes under forest area.
4. Dhangal -
The area is situated 10 km.from Madded. Area is bounded between longitude (80o30'0" to 80o50'0" and latitude 18o40'15" to 18o45'0" in the Toposheet No. 65 B/9. The corundum recovered is insitu i.e. from biotite granite gneisses. The corundum is pinkish violet in colour and characterised by basal pinacoid prism and striations. Corundum is translucent and can be placed in semiprecious stone category.
5. Chikudapalli - (80o 24' 4" : 18o 52' 00", Toposheet No. 65 B/5)
The area is situated 5 km. due NE of Bhopalpatnam. The blue corundum (Sapphire variety) was recovered from pits upper soil zone. The corundum is greyish blue to blue in colour. It is translucent, columnar shape, having basal pinacoid, hexagonal prism and characterised by oblique striations.
6. Yapla - (80o 27' 45" : 18o 51' 45", Toposheet No. 65 B/5)
The corundum is recovered from Gorla nala section near village Yapla. The corundum is yellowish and pink in colour. The country rock of the area is granite gneisss.
7. Sonakukanar, Sukma area- ( Toposheet No. 65 F/ 10)
Corundum has been reported around villages Sonakukanar and Nagaras. Here corundum occurs within fuchiste schist in disseminated form. This fuchiste corundum schist alligned in a band or strip possibley due to seggregation of high aluminus horizon. Corundum also found in the form placer in the area. It is deepred, pinkish and brown in colour, hexagonal, barrel shaped and fractured. A possible reserve of 18.00 tonnes of industrial grade corundum is available in the area.