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Singh, A. K.
- Wrinkle Marks from Lower Rewa Formation (Upper Vindhyan) of Manikpur Area, Banda District, Uttar Pradesh, India
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Authors
Affiliations
1 Department of Geology, University of Lucknow, Lucknow, IN
1 Department of Geology, University of Lucknow, Lucknow, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 13, No 3 (1972), Pagination: 286-288Abstract
No Abstract.- On the Occurrence of Scheelite in Almora and Chamoli Districts, Uttar Pradesh
Abstract Views :174 |
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Authors
Affiliations
1 Lucknow, U. P., IN
1 Lucknow, U. P., IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 24, No 8 (1983), Pagination: 394-398Abstract
Presence of scheelite is reported in the panned concentrates prepared from stream sediments collected from certain tributaries of Pindar river in Chamoli district. Studies carried out so far show that scheelite mineralisation is strata-controlled occurring within a garnetiferous-mica schist member. The host rocks are (i) green coloured epidote-amphibole rich rock (amphibolite?) and (ii) light coloured quartz-epidotecalcite bodies (boudins ?). Associated minerals are calc-silicates namely, actinolite, diopside, garnet and epidote; calcite is also present mainly in boudins, The garnetiferous schist member has been traced in both the limbs of Almora-Dudatoli syncline, along with the mineralised host rocks. The study indicates possibility of tracing extensive scheelite deposits in the crystalline nappe rocks of Himalayas. The deposits are believed to be of volcano-sedimentary origin, where tungsten is derived from submarine volcanic processes that took place during the deposition of limy argillaceous sediments.- Tin Mineralisation in Almora District, Uttar Pradesh
Abstract Views :193 |
PDF Views:115
Authors
B. D. Shukla
1,
A. K. Singh
1
Affiliations
1 U.P., Lucknow, IN
1 U.P., Lucknow, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 31, No 3 (1988), Pagination: 347-349Abstract
No Abstract.- Radioactive Fossil Placer (Cyrtolite-Hematite Ironstone) from the Boleng Area, East Siang District, Arunachal Pradesh, India
Abstract Views :197 |
PDF Views:1
Authors
Affiliations
1 Atomic Minerals Division, Department of Atomic Energy, Hyderabad-500 016, IN
2 Atomic Minerals Division, Department of Atomic Energy, Bangalore-560 072, IN
3 Atomic Minerals Division, Department of Atomic Energy, Calcutta-700 026, IN
1 Atomic Minerals Division, Department of Atomic Energy, Hyderabad-500 016, IN
2 Atomic Minerals Division, Department of Atomic Energy, Bangalore-560 072, IN
3 Atomic Minerals Division, Department of Atomic Energy, Calcutta-700 026, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 43, No 4 (1994), Pagination: 407-413Abstract
A zirconium-rare earth (RE)-thorium-uranium fossil placer with about 60-84% heavy and resistant minerals is recorded in association with quartzite and metagreywacke of the Proterozoic Miri Group from the Boleng area in East Siang District of Arunachal Pradesh. The heavy minerals occur as thin layers with variable thickness of a fraction of a cm to a maximum of 12 cm. The mineralised rocks are hard, highly compact, very heavy (sp. gr. 3.96-4.66), massive (at places, banded) and exhbit clastic texture with rounded to subrounded and well sorted fine grains of heavy minerals pointing to a long distance of transportation. Mineralogically, it consists of 46-61% opaques (mostly Ti-hematite), 9-13% rutile, 3-9% cyrtolite, 0.7-4.5% monazite and 0.2-0.9% thorite, all set in 10-30% sericitic matrix. Chemically, it is markedly different from the widespread unconsolidated coastal and inland placers, and analyses about 43-62% iron oxides, 1.7-5.4% Zr02, 0.5-3.1 % (RE,Y)2O3, 0.1-0.5% ThO2, and 0.01-0.9% U3O8. Chondrite-normalizcd REE-pattems show light REE enrichment and heavy REE depletion, with (Ce/Yb)cn ratio of 9-10 and markedly negative Eu-anomaly (Eu/Eu: 0.18-0.22). Generally, consolidated placers (fossil placers) are monazite-rich, whereas unconsolidated placers are, zircon-rich and viewed in this light, the cyrtolite (zircon)-rich fossil placer from the Boleng area is a rare occurrence.Keywords
Fossil Placer, Radioactivity, Boleng, Arunachal Pradesh.- Platinum Mineralization in Ikauna Area, Lalitpur District, Uttar Pradesh
Abstract Views :214 |
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Authors
Affiliations
1 Directorate of Geology and Mining, Lucknow - UP, IN
1 Directorate of Geology and Mining, Lucknow - UP, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 68, No 4 (2006), Pagination: 582-584Abstract
Incidence of Pt and Pd along with Au and Ag has been recorded in the serpentinised peridotites near Ikauna village(24°23'19"78°52'40"), Lalitpur district, Uttar Pradesh, which are in contact with gabbroic/dioritic and granitic rocks in the north and dioritic rocks in the south. The peridotite/serpentinised Talc-Actinolite schist zone has been traced for a distance of 15 km along the strike with an average width of 90m. Selected trench samples have shown Pt up to 1 71 ppm, Pd 2 02 ppm, Ir 0 62 ppm, Ru 0 07 ppm, Rh 0 30 ppm, Au 0 23 ppm, Ag 19 99 ppm, and NI 4800 ppm, Co 397 ppm, and Cr 4400 ppm. The zone continues eastwards and westwards with reduced width, but with incidence of these metals. Exploration is continuing for ascertaining existence of econormically viable mineralization.Keywords
Platinum Minerallisation, Madaura Ultrabasic Complex, Ikauna Area, Lalitpur, Uttar Pradesh.- Morphology and Analysis of Gold Grains Associated with Auriferous Quartz Veins, Gopur, Keonjhar District, Orissa
Abstract Views :190 |
PDF Views:2
Authors
S. K. Das
1,
B. K. Nayak
1,
P. Chattopadhyay
1,
J. Muralidhar
1,
B. B. Nayak
1,
A. K. Singh
2,
R. K. Sahoo
3
Affiliations
1 Regional Research Laboratory, Bhubaneswar - 751 013, IN
2 2N3/278, IRC Village, Bhubaneswar - 751 015, IN
3 137, Jagganath Vihar, Bhubaneswar - 751 003, IN
1 Regional Research Laboratory, Bhubaneswar - 751 013, IN
2 2N3/278, IRC Village, Bhubaneswar - 751 015, IN
3 137, Jagganath Vihar, Bhubaneswar - 751 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 3 (2003), Pagination: 335-342Abstract
At Gopur, Onssa, auriferous quartz veins with stringers and rich disseminations of sulphides occur in the latcntes derived by tropical weathering of metabasaltic rocks. Minute to coarse irregular gold grains were hand picked from the panned heavies obtained by washing the excavated wall rock materials of the quartz veins which are composed of powdery latente ± kaolinite ± quartz. The gold grains display pitted, fractured, striated, wavy surface and occasional smooth contour pattern. The gold content of the quartz veins and latentic wall rocks vanes widely from < 1 ppm to 9 ppm SEM-EDS and microprobe analytical results of four gold grains reveal contrasting chemical characters. One gold gram exhibits nmward increase in fineness value indicating that silver has been preferentially leached out by supergene fluid. This grain possibly represents the residually concentrated hypogene gold. The other gold grains do not show chemical gradients within the domain of individual gram and formed by precipitation from supergene fluids.Keywords
Gold, Supergene Mineralisation, Vein Quartz, Latentcs Fineness, Gopur, Orissa.- Metamorphic History of Sapphirine- and Relict-Kyanite-bearing Mg-Al Rich Rocks at Hatimunda Hill near Jumagarh, Kalahandi District, Orissa
Abstract Views :248 |
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Authors
Affiliations
1 Department of Earth Sciences, Indian Institute of Technology, Powai, Mumbai, 400076, IN
2 Department of Applied Geology, Indian School of Mines, Dhanbad, 826004, IN
3 Orissa Mining Corporation Ltd., Bhubaneswar, Orissa, 751001, IN
1 Department of Earth Sciences, Indian Institute of Technology, Powai, Mumbai, 400076, IN
2 Department of Applied Geology, Indian School of Mines, Dhanbad, 826004, IN
3 Orissa Mining Corporation Ltd., Bhubaneswar, Orissa, 751001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 57, No 5 (2001), Pagination: 417-427Abstract
Cordierite-phlogopite dominated Mg-Al rich rocks occur as small enclaves at the Hatimunda hill near Junagarh in the Orissa sector of the Eastern Ghats belt. Peak mineral assemblages in these rocks included phlogopite, bronzite, kyanite (now reliet) and quartz/corundum. Sapphirine typically occurs as corona around corundum or in chisters along with corundum. The sapphirine is slightly more aluminous than the MgO:Al2O3:SiO2 ratio of 7:9:3. Textural criteria and phase analysis in the model system MAS indicate the follwing reactions: Opx+Sil+Qtz+Crd; Opx+Sil=Crd+Crn; and Opx+Crn=Spr+Crd. A qualitative petregenetic grid shows that these reactions may be crossed in sequence along a decompressional P-T trajectory. The rocks preserve textural evidence of formation of sapphirine, at least in part, from phlogopite and sillimanite. P-T conditions for peak metamorphism were 700-800° C and > 8kbar based on the stability field of mineral assemblages. Texturally, early kyanite and late sillimanite indicate that the decompression is possibly part of a clockwise P-T path. This interpretation is supported by the occurrence of Mg-rich garnet (Xprp + 0.47) in the amphibole-dominated Mg-Al rich schist of the neighbouring Jilindara area.Keywords
Sapphirine, Cordierite, Phlogopite, Relict kyanite, Decompression, Eastern Ghats.- A Note on the Characters of Some Lower Gondwana Coals of West Siang District in the Arunachal Himalaya and their Trace Element Content
Abstract Views :222 |
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Authors
Affiliations
1 National Metallurgical Laboratory, Jamshedpur - 831 007, IN
2 Wadia Institute of Himalayan Geology, 33, GMS Road, Dehradun - 248 001, IN
1 National Metallurgical Laboratory, Jamshedpur - 831 007, IN
2 Wadia Institute of Himalayan Geology, 33, GMS Road, Dehradun - 248 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 3 (2009), Pagination: 395-401Abstract
Lower Gondwana coal from Garu-Gensi area in the West Siang district of Arunachal Pradesh in the Eastern Himalayas have been characterized with respect to their maceral constituents, mineral matter, ash composition, sulphurand trace-element contents. These are low-rank bituminous coals (V0 = 0.64) and their vitrinite content is about 60%. A first hand data with respect to twenty one trace-elements are reported. Our data indicate that these Lower Gondwana coals of extra-peninsular region are richer in terms of their trace-element content when compared with their counter parts of peninsular India.Keywords
Lower Gondwana Coal, Trace Element, Eastern Himalaya, Arunachal Pradesh.References
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- MOHANTY, J.K., MISRA, S.K. and MOHAPATRA, B.K. (2006) Distribution of trace elements in coal-lithotypes from Talcher Coalfield, Orissa. Jour. Geol. Soc. India, v.68, pp.675-684.
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- MUKHERJEE, K.N., DUTTA, N.R., CHANDRA, D., PANDALAI, H.S. and SINGH, M.P. (1988) A statistical approach to the study of the distribution of trace elements and their organic/inorganic affinity in Lower Gondwana coals of India. Int. Jour. Coal. Geol., v.10, pp.99-108.
- MUKHERJEE, K.N., DUTTA, N.R., CHANDRA, D. and SINGH, M.P. (1992) Geochemistry of trace elements of Tertiary coals of India. Int. Jour. Coal Geol., v.20, pp.99-113.
- MUKHERJEE, K.N., RAJA RAO, C.S., CHOWDHURY, A.N., PAL, J.C. and DAS, M. (1982) Trace element studies in the major Tertiary and Gondwana coalfields of India. Bull. Geol. Surv. India, Series A - Economic Geology, No.49, 115p.
- RAJA RAO, C.S. (Ed.) (1981) Coalfields of India, v.I: Coalfields of North Eastern India, Bulletin Series A, No.45, Geol. Surv. India, 76p.
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- Sequence Stratigraphic Analysis of Pre-Tertiary Succession in Ganga Basin
Abstract Views :200 |
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Authors
A. K. Singh
1,
J. N. Singh
1
Affiliations
1 Basin Studies Division, K.D.M.I.P.E, ONGC Ltd., Kaulagarh Road, Dehradun - 248195, IN
1 Basin Studies Division, K.D.M.I.P.E, ONGC Ltd., Kaulagarh Road, Dehradun - 248195, IN