Refine your search
Collections
Co-Authors
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Acharya, B. C.
- Reply
Abstract Views :196 |
PDF Views:125
Authors
Affiliations
1 Mineralogy and Metallography Group, Regional Research Laboratory, Bhubaneswar 751 013, IN
1 Mineralogy and Metallography Group, Regional Research Laboratory, Bhubaneswar 751 013, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 33, No 1 (1989), Pagination: 83-84Abstract
No Abstract.- Mineralogical Characterisation of the Complex Sulphide Ores from Askot, Pithoragarh District, U.P
Abstract Views :161 |
PDF Views:2
Authors
Affiliations
1 Mineralogy and Metallography Group, Regional Research Laboratory, Bhubaneswar 751 013, IN
1 Mineralogy and Metallography Group, Regional Research Laboratory, Bhubaneswar 751 013, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 32, No 4 (1988), Pagination: 327-333Abstract
Sphalerite, galena, chalcopyrite and arsenopyrite are the dominant ore minerals with minor amounts of pyrrhotite, cubanite, marcasite, pyrite and chalcocite. Bornite, stibnite, native bismuth and silver are present in trace quantities. Chemical analyses of the samples reveal variations in different metal values. Sphalerite, galena, chalcopyrite and arsenopyrite are analysed by Scanning Electron Microscope coupled with EDAX analyser to decipher the distribution of valuable elements in them.The ore needs grinding to 45 microns to liberate 91.70% of galena, 94.49% of sphalerite, 95.31% of chalcopyrite and 98.45% of composite galena-chalcopyrite-sphalerite. This suggests that by physical beneficiation, individual concentrates of Pb, Cu and Zn with good recoveries may be difficult to obtain, but a bulk concentrate of these three metals can be produced.
- Nishikhal Manganese Deposit, Koraput District, Orissa
Abstract Views :212 |
PDF Views:2
Authors
Affiliations
1 Regional Research Laboratory, Bhubaneswar 751013, IN
1 Regional Research Laboratory, Bhubaneswar 751013, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 36, No 6 (1990), Pagination: 644-653Abstract
Manganese ores of Nishikhal occur as distinctly conformable bands in the khondalite suite of rocks. Presence of phosphorus, iron and silica beyond desirable limit in most of the ores makes them unsuitable for industrial purposes. The dominant ore minerals are psilornelane, cryptomelane, pyrolusite and goethite. These ores are formed by supergene enrichment of primary syngenetic metamorphosed assemblages. Phosphorus is present as a discrete mineral phase in the form of apatite contained in the silicate minerals, as well as fixed in the crystal structure of goethite, cryptomelane and psilomelane. Physical beneficiation may be employed to remove the silicate minerals which will ultimately reduce a part of phosphorus. Removal of iron by this method may be difficult because of the fine grain-size and complex intergrowth with goethite.Keywords
Economic Geology, Manganese, Koraput, Orissa, Khondalite.- Mineralogy of Tin Ores from Koraput District, Orissa
Abstract Views :176 |
PDF Views:2
Authors
Affiliations
1 Regional Research Laboratory, Bhubaneswar 751 013, IN
2 Directorate of Mines, Govt. of Orissa, Bhubaneswar, IN
3 Orissa Remote Sensing Application Centre, Bhubaneswar, IN
1 Regional Research Laboratory, Bhubaneswar 751 013, IN
2 Directorate of Mines, Govt. of Orissa, Bhubaneswar, IN
3 Orissa Remote Sensing Application Centre, Bhubaneswar, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 34, No 4 (1989), Pagination: 405-412Abstract
Tin along with Nb and Ta occurs both as primary mineral in pegmatites and as detrital mineral in the colluvial, eluvial and alluvial placers in Matili-Mundaguda area of Koraput District, Orissa. Cassiterite is commonly associated with soda plagioclase, microcline, perthite, quartz and muscovite, and it invariably contains inclusions of columbite-tantaIite, tapiolite, pyrochlore and fergusonite varying from 0.4 to 18% by volume and 3 to 400 microns in size. Minerals, like ilmenite, magnetite, lepidolite, pyrite, chalcopyrite and sphalerite are also associated with cassiterite. Nb and Ta is present in cassiterite both in solid solution as well as separate mineral phases.- Pyrophanite from Nishikhal Manganese Deposit, Orissa
Abstract Views :192 |
PDF Views:141
Authors
Affiliations
1 Regional Research Laboratory (CSIR), Bhubaneswar-751013, IN
1 Regional Research Laboratory (CSIR), Bhubaneswar-751013, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 44, No 1 (1994), Pagination: 91-93Abstract
No Abstract.- Occurrence of Columbite Mineralisation Around the Talbahal-Karunapali Area, Phulbani District, Orissa
Abstract Views :172 |
PDF Views:138
Authors
Affiliations
1 Regional Research Laboratory, Bhubaneswar-751013, Orissa, IN
1 Regional Research Laboratory, Bhubaneswar-751013, Orissa, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 44, No 2 (1994), Pagination: 219-222Abstract
In the columbite-bearing pegmatite occurrences in the Eastern Ghats Complex around Talbahal - Karunapali area of Phulbani district, economic concentrations of columbite with appreciable quantities of tungsten and trace of tin are recorded in the colluvial and eluvial placers surrounding the source pegmatite.- Factor Model for the Genesis of Manganese Deposit, Balaghat, M.P.
Abstract Views :173 |
PDF Views:1
Authors
Affiliations
1 MM Division, Regional Research Lab., Bhubaneswar-751 013, IN
1 MM Division, Regional Research Lab., Bhubaneswar-751 013, IN