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Co-Authors
- D. K. Sinha
- Sohail Fahmi
- Govind Singh
- Rajendra Singh
- Yamuna Singh
- K. D. P. Singh
- A. K. Dwivedi
- Joydip Sen
- C. Murugan
- G. Bairwa
- P. V. Ramesh Babu
- S. A. Pandit
- Ajay K. Naithani
- K. S. Krishna Murthy
- U. K. Pandey
- Mallikarjun Joshi
- Animesh Mandal
- Arkoprovo Biswas
- Saurabh Mittal
- William K. Mohanty
- Shashi Prakash Sharma
- Debashish Sengupta
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
Bhatt, A. K.
- Evidences for Soda Metasomatism in Ladera-Sakhun Area, Northeastern Rajasthan
Abstract Views :212 |
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Authors
Affiliations
1 Department of Atomic Energy, C-31, Devnagar, Tonk Road, Jaipur-302018, IN
2 Department of Atomic Energy, AMD Complex, Begumpet, Hyderabad-560016, IN
1 Department of Atomic Energy, C-31, Devnagar, Tonk Road, Jaipur-302018, IN
2 Department of Atomic Energy, AMD Complex, Begumpet, Hyderabad-560016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 5 (2000), Pagination: 573-582Abstract
Albitite and albitised banded gneissic country rock from the Ladera-Sakhun area, situated about 80km southwest of Jaipur, show several evidences for soda metasomatism. Megascopic evidences include reddening of outcrops due to aventurisation, gradational contacts between albitite and gneisses, development of metasomatic minerals, dequartzification, epidotization and cataclasitisation. Microscopic evidences include relict microcline in the newly formed albite grain, poor and discontinuous development of twin lamellae in albite giving step-like appearance, ubiquitous sweeping extinction in albite due to cataclasitisation, occasional mortar texture in albitite, tapering of twin lamellae within the grain, twin lamellae forming in chequered fashion, development of aventurine albite containing dusty Fe-oxide inclusions, development of albite along twin/cfeavage plane of microcline, formation of new albite in plagioclase, destruction of sericite in plagioclase of albitised granite, formation of myrmekite of intergranular, intragranular and rim types, development of epidote corona around clinopyroxene in pyroxenite, partial to complete dequartzification and filling up of voids by calcite. Petrochemical evidences of increased characteristic values of Na2O from 3.17 to 7.00 wt%, K2O and Si2O from -0.03 to -6.00 wt% and -0.76 to -10.55 wt% in the unalbitised to albitised rocks respectively, provide further support for soda metasomatism. Albitisation at Ladera-Sakhun area extends over a considerable distance into Haryana in the NE and beyond Tal in the SW, attesting to its regional significance and its potential for mineralisation.Keywords
Petrology, Metasomatism, Albitite, Ladera-Sakhun, Rajasthan.- Phurcalite: A Rare Secondary Calcium Uranium Phosphate Mineral from Putholi, Chittaurgarh District, Rajasthan
Abstract Views :174 |
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Authors
Affiliations
1 Atomic Minerals Division, Department of Atomic Energy, Begumpet, Hyderabad- 500016, IN
2 J. L. N. Road, Jaipur-302004, IN
1 Atomic Minerals Division, Department of Atomic Energy, Begumpet, Hyderabad- 500016, IN
2 J. L. N. Road, Jaipur-302004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 53, No 3 (1999), Pagination: 355-357Abstract
X-ray powder diffraction data are presented for phurcalite [Ca2(UO2)3 (PO4)2 (OH4 4H2O], with orthorhombic symmetry, a very rare, yellow coloured, secondary uranium mineral, from Putholi (24°57'45":74"38'30"). The host rock is quartzite which contains fluorapatite, pyrite, goethite, hematite, magnetite, chlorite and mica as accessory minerals. Measured cell parameters of the phurcalite are: a0 = 17.3416 Å, b0 = 16.1138 Å and c0 = 13.5491 Å, with a cell volume of 3786.16 Å3.Keywords
Mineralogy, Phurcalite, Rajasthan.- The Application of Hydrogeochemical Method in Uranium Exploration - A Case Study from Barabazar-Manbazar Area, Purulia District, West Bengal
Abstract Views :197 |
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Authors
A. K. Dwivedi
1,
Joydip Sen
1,
C. Murugan
1,
G. Bairwa
1,
A. K. Bhatt
1,
P. V. Ramesh Babu
1,
S. A. Pandit
2
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Jamshedpur-831002, IN
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad-500016, IN
1 Atomic Minerals Directorate for Exploration and Research, Jamshedpur-831002, IN
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad-500016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 4 (2008), Pagination: 561-570Abstract
Hydrogeochemical exploration were earned out over an area of 700 sq km in Barabazar-Manbazar area of Purulia district, West Bengal, in order to identify target areas for the uranium mineralization. Water samples were collected from 504 borewells in the Singhbhum Group meta-Sediments and Chhotanagpur Granite Gneissic Complex (CGGC) including South Purulia Shear Zone (SPSZ). For individual Iithological domains, univariate and multivariate statistical techniques were applied to the analytical data on 10 variables, i.e. U, Na+, K+ , Mg+2, Ca+2, SO4-2, HCO3, Cl-, conductivity and pH. Five hydro uranium anomalous zones withm CGGC were delineated at Raghunathpur, Tentla, Chepua-Dighi, Ban and Jitujon areas. However, distinct pattern of high uranium values along with uranium/Conductivity are observed only in Raghunathpur-Tentla and Chepua-Dighi areas in the proximal tectonized zones of SPSZ. Based on the distinctive hydrogeochemical attributes, and favourable geology and structure, the areas in the vicinity of Raghunathpur-Tentla and Chepua-Dighi in the northern proximal contact of SPSZ, are designated as potential target areas for detailed geological and geophysical exploration.Keywords
Hydrogeochemistry, Uranium, SPSZ, CGGC, Singhbhum Group, Purulia, West Bengal.- Geological and Geotechnical Investigations of Loharinag-Pala Hydroelectric Project, Garhwal Himalaya, Uttarakhand
Abstract Views :188 |
PDF Views:0
Authors
Affiliations
1 National Institute of Rock Mechanics, Kolar Gold Fields - 563 117, IN
2 Water and Power Consultancy Services (I) Ltd., Gurgaon, IN
3 928, 22nd Main Road, IV T Block, Jayanagar, Bangalore - 560 041, IN
1 National Institute of Rock Mechanics, Kolar Gold Fields - 563 117, IN
2 Water and Power Consultancy Services (I) Ltd., Gurgaon, IN
3 928, 22nd Main Road, IV T Block, Jayanagar, Bangalore - 560 041, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 73, No 6 (2009), Pagination: 821-836Abstract
The project area, forming a part of Bhagirathi valley, exposed rocks classed as central Himalayan crystallines and are medium to high grade metamorphics. The rock types exposed are feldspathic gneisses, quartz-biotite schists, garnet-biotite schist, biotite gneisses, migmatites and amphibolites. To design the rock support for the underground structures of desilting chambers, HRT, surge shaft, pressure shafts, power house, TRT and for the foundations of barrage and intake of desilting chambers, rock mass classifications was attempted following the methods of Bieniawski Rock Mass Rating (RMR) Classification and Tunnelling Quality Index (Q) of Barton et al. RMR technique involves collection of data on rock strength, RQD (%), spacing of discontinuities, condition of discontinuities and groundwater condition, while the 'Q' involves collection of data on RQD (%), joint set numbers (Jn), joint roughness number (Jr), joint alternation number (Ja), joint water reduction factor (Jw) and stress reduction factors (SRF). The permeability test in the overburden was done by the constant head method, while in the bed rock portion conducted by packer test. The result indicates that the rock masses of the area fall under the good, fair and poor rock quality. Augen gneiss of power house area is coming under the category of moderately strong rock as proved by deformability characteristics and strength parameter. On the basis of above study recommendations have been made for the proper and safe construction of the project components.Keywords
Hydroelectric, Rock Mass Classification, Tunnel Quality Index, Garhwal Himalaya, Uttarakhand.References
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- BARTON, N., LIEN, R. and LUNDE, J. (1974) Engineering classification of rock masses for the design of tunnel support.Rock Mechanics, v.6(4), pp.189-236.
- BARTON, N., LOSET, F., LIEN, R. and LUNDE, J. (1980) Application of the Q-system in design decisions concerning dimensions and appropriate support for underground installations. Intnatl.Conf. on Sub-surface Space, Rock Store, Stockholm. SubSurface Space, 2, pp.553-561.
- BIENIAWSKI, Z.T. (1979) The geomechanics classification in rock engineering application. Proc. 4th Internatl. Congress on Rock Mechnacics, ISRM, Montreux, Balkema, Rotterdam, v.2, pp.41-48.
- BIENIAWSKI, Z.T. (1984) Rock mechanics design in mining and tunneling. A.A. Balkema, Rotterdam, 272p.
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- IS 13365 (Part 1) (1998) Rock Mass Rating (RMR) for Predicting Engineering Properties. Bureau of Indian Standards, New Delhi, 11p.
- MALLIK, S.K. (1976) Second geotechnical note on the LoharinagPala Hydel scheme, Bhagirathi River, Uttarkashi District, Uttar Pradesh. Unpubld. report of Irrigation Department, Govt. of Uttar Pradesh, pp.1-15.
- METCALFE, R.P. (1993) Pressure, temperature and time constraints on metamorphism across the Main Central Thrust zone and High Himalayan Slab in the Garhwal Himalaya. In: P.J. Treloar and M.P. Searle (Eds.), Himalayan Tectonics. Geol. Soc.London, Spec. Publ., No.74, pp.485-509.
- NAITHANI, A.K., BHATT, A.K. and SUNDRIYAL, Y.P. (2007) Landslide hazard zonation mapping: A case study for the hydropower project in a Part of Garhwal Himalaya, Uttaranchal, India. Jour.Himalayan Geol., v.28(1), pp.63-73.
- PANT, G. (1973) Preliminary geotechnical report on the LoharinagPala Hydel scheme, Bhagirathi River, Uttarkashi District, Uttar Pradesh. Unpubld. report of Irrigation Department, Govt. of Uttar Pradesh, pp.1-41.
- PANT, G. and MALLIK, S.K. (1974) A geotechnical report on the Loharinag Pala Hydel scheme, Bhagirathi River, Uttarkashi District, Uttar Pradesh. Unpubld. report of Irrigation Department, Govt. of Uttar Pradesh, pp 1-28.
- PANT, G. and MALLIK, S.K. (1978) Third geotechnical note on the Loharinag-Pala Hydel scheme, Bhagirathi River, District Uttarkashi, Uttar Pradesh. Unpubld. report of Irrigation Department, Govt. of Uttar Pradesh, pp.1-14.
- PUROHIT, K.K., ISLAM, R. and THAKUR, V.C. (1990) Metamorphism of Psammo-Pelitic rock, Bhagirathi Valley, Garhwal Himalaya.Jour. Himalayan Geol., v.1(2), pp.167-174.
- ROY, A.B. and VALDIYA, K.S. (1988) Tectonometamorphic evoluation of the Great Himalayan thrust sheets in Garhwal region, Kumaun Himalaya. Jour. Geol. Soc. India, v.32, pp.106-124.
- SAHAI, A. and SRIVASTAVA, R.K. (1997) Structural and geochemical characteristics of amphibolites from the Bhagirathi and Yamuna valleys of Main Central Thrust Zone, Garhwal Himalaya. Jour. Himalayan Geol., v.18, pp.191-201.
- SERAFIM, J.L. and PEREIRA, J.P. (1983) Constructions of the geomechanics classification of Bieniawski. Proc. Int. Symp.on Engg. Geol. and Underground Construction. LNEC, Lisob, Portugal.
- SHOME, S.K. and NARULA, P.L. (1969) Reconnaissance geological report on the Loharinag-Pala and Pala Maneri Hydel Projects, District Uttarkashi, Uttar Pradesh. Unpubld. report of Irrigation Department, Govt. of Uttar Pradesh, pp.1-28.
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- Geochemistry and Geochronology of A-Type Barabazar Granite: Implications on the Geodynamics of South Purulia Shear Zone, Singhbhum Craton, Eastern India
Abstract Views :209 |
PDF Views:0
Authors
A. K. Dwivedi
1,
U. K. Pandey
1,
C. Murugan
1,
A. K. Bhatt
2,
P. V. Ramesh Babu
1,
Mallikarjun Joshi
3
Affiliations
1 Atomic Minerals Directorate for Exploration and Research (AMD), Hyderabad - 500629, IN
2 Atomic Minerals Directorate for Exploration and Research (AMD), Jamshedpur - 831 002, IN
3 Banaras Hindu University, Varanasi - 221005, IN
1 Atomic Minerals Directorate for Exploration and Research (AMD), Hyderabad - 500629, IN
2 Atomic Minerals Directorate for Exploration and Research (AMD), Jamshedpur - 831 002, IN
3 Banaras Hindu University, Varanasi - 221005, IN