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Rai, S. D.
- A Note on the Yttrium Mineral Potential of Granitic Soils in Parts of Andhra Pradesh, India
Authors
1 Atomic Minerals Division, Begumpet, Hyderabad 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 2 (1991), Pagination: 207-210Abstract
Survey in parts of Karimnagar district, Andhra Pradesh, has brought to light the occurrence of colluvial placer deposits with appreciable concentration of REE and Y minerals in Dharmawaram-Yerabali area. The heavy minerals in the soil are thorite, zircon, xenotime, monazite, rutile, ilmenite, brookite, and magnetite. Panned concentrates (n=18) analysed 0.19 to 0.40% Y2O3 Dilute sulphuric acid leaching of the mineral concentrates solubilised 50% Y2O3.Keywords
Yttrium, REE, Soil, Andhra Pradesh.- Yttrium-Europium-Erbium Geochemistry of Granitic Soils of Kunkuri Area, Raigarh District, Madhya Pradesh, India
Authors
1 Atomic Minerals Division, Begumpet, Hyderabad 500016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 40, No 4 (1992), Pagination: 347-358Abstract
The duricrust and the soils derived from the Precambrian granitic rocks of Kunkuri area in Raigarh district, Madhya Pradesh, contain anomalous concentratioIis of rare earth and yttrium minerals. The polymineral table concentrates obtained from the granitic soil contain xenotime, monazite, zircon, Hmenite and rutile. Chemical analyses of table concentrate indicate values up to 3.08% Y 203.0.30% Er203 and 0.0286% EU203 in the ratio of 10 : 1 : 0.1. Corresponding data on table concentrates from the source granitic rocks also demonstrate a similar form in Y 203 : Er203 : EU203' Y/Er ratio is 10. which is similar to the average granites, while Er/Eu ratio of 10 is anomalously high, being 4 times the average for granitic rocks. Since the REE and Y·bearing minerals are radioactive and contribute to a major part of the radioactivity in soHI alluvial deposits of the areas investigated, aeroradiometric surveys fonowed by ground radiometric checkings, preferably along 2nd to 5th order streams in the adjoining areas, are recommended.Keywords
Geochemistry, REE, Soils, Kunkuri, Madhya Pradesh.- Xenotime Placers in Parts of Mahan River Basin, Surguja District, Madhya Pradesh
Authors
1 Atomic Mineral Division, Begumpet, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 45, No 3 (1995), Pagination: 285-293Abstract
Several inland placers containing commercially viable resources of xenotime have been described from the Chhotanagpur granite gneiss terrain of Gumla district, Bihar and Raigarh district, M.P. Recent surveys in the adjoining western sector of Surguja district, have confirmed xenotime as a significant minor constituent (3-5 %) in the heavy mineral assemblages (1-4 %) of the various tributaries , of Mahan river.The assemblage is typical characteristic of a granite migmatitic provenance. Geomorphologically, few of these occurrences are developed over limited extents as poorly sorted sediments in low order, less mature streams having steeper slope and smaller depth with an insignificant flood plain development. Mineralogically, the heavy mineral assemblages consist of ilmenite ± garnet (10-40 Wt%) with monazite (40-70 Wt%), zircon (10-20 Wt%) and magnetite (traces to 5 Wt%). A few of these placers are being investigated as potential sources for Yttrium as their heavy mineral suites, quantitatively, have a higher total content of xenotime and nronazite for upgradation to a marketable product acceptable to the chemical industry.
Keywords
Xenotime, Stream Placers, Economic Geology, Mahan River Basin, Madhya Pradesh.- LREE–Nb Mineralization in the South Western Part of Ambadongar Carbonatite Complex, Chhota Udepur District, Gujarat, India
Authors
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Beach Sand and Offshore Investigations, Thiruvananthapuram 695 012, IN
3 Atomic Minerals Directorate for Exploration and Research, Western Region, Jaipur 302 033, IN
Source
Current Science, Vol 114, No 08 (2018), Pagination: 1608-1610Abstract
The Ambadongar sub-volcanic carbonatite alkali complex is located about 140 km east of Vadodara, Chhota Udepur district, Gujarat, India and falls in Survey of India Toposheet No. 46 K/1. The complex intrudes Bagh sandstone (Cretaceous) and overlying Deccan basalts (Eocene) and is situated in the Narmada rift zone. The carbonatites came into prominence in the early 1960s with significant discoveries of fluorite and conspicuous radioactivity located near Chhota Udepur, at Ambadongar, the erstwhile Baroda district, Gujarat. Earlier workers have clarified many aspects of the carbonatite complex.References
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