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- R. V. Singh
- P. Nageswara Rao
- V. P. Saxena
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- S. Niranjan Kumar
- G. Nagendra Babu
- P. B. Maithani
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- Bhaskar Basu
- Manish Sharma
- C. S. Gupta
- S. Thippeswamy
- G. B. Joshi
- R. Mohanty
- Anjan Som
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Journals
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Jeyagopal, A. V.
- Geology of the Julakallu Area, Palnad Sub-Basin, Cuddapah Basin, Guntur District, Andhra Pradesh
Abstract Views :203 |
PDF Views:2
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 0 16, IN
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 0 16, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 68, No 1 (2006), Pagination: 103-114Abstract
Recent geological studies have brought out the presence of hitherto unknown Cumbum shale/Phyllite in the Julakallu-Pinneli area, Guntur district, Andhra Pradesh within the Palnad Sub-Basin of the Cuddapah basin. Cumbum shale/Phyllite and quarzite was found to rest above the Narji Limestone at southeast of Petasannigandla. This has necessitated northward shift of thrust boundary separating the Cumbum Formation and Narji Limestone from earlier known location. Subsurface data have confirmed larger thickness of the Narji Limestone than that reported in the literature. Geochemical characteristics of the Cumbum shale/Phyllite have indicated its deposition as first cycle of sediments in a tectonically active setting. This is supported by the depletion of immobile oxide Al2O3 and enrichment of mobile oxide CaO in the Cumbum shale. The A-CN-K plot indicates that provenance for shale/Phyllite could be granodiorite to granite in composition, which is also supported by petrological observations. The field, petrological and geochemical interpretations have brought out much new information on this part of the basin, which necessitates, revision of the geology of area.Keywords
Cumbum Formation, Narji Limestone, Thrust Boundary, Cuddapah Basin, Julakallu, Andhra Pradesh.- Discovery of Uranium Mineralisation in Sheared Quartzite and Associated Crystallines in the Environs of Pranhita-Godavari Basin, Mysemgutta, Kaddam Area, Adilabad District, Andhra Pradesh
Abstract Views :176 |
PDF Views:2
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Hyderabad - 500 016, IN
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 3 (2008), Pagination: 331-336Abstract
Reconnaissance radiometric surveys in the northwestern parts of the western Pakhal belt in the Pranhita-Godavari Basin (PG basm), have led to the location of uranium anomalies for the first time in the environs of P-G Basin exclusively in the "older sheared fuchsite bearing quartzite'' overlain by the Neo-Proterozoic Penganga sediments in the proxmity of their unconformity contact at Mysemgutta, Kaddam, district Adilabad, A. P. Surface mineralisation is manifested in the form of secondary uranium minerals associated mainly along the fractures in the fault zones. The quartzite assayed up to 0.23% U3O8 with negligible thorium (2). Follow up petrological and XRD studies of the rocks revealed the presence of primary uranium mineral uraninite (UO2) in addition to secondary U-Minerats in the form of lanthinite [U6O7(OH)2O], metatorbernite [Cu(UO2)2(P04)2 8H2O] and phosphuranylite [Ca(UO2)4(PO4)2(OH)4 7H2O], besides U+Ti phases/brannerite [U,Ca,Ce)(Ti,Fe)206 Other ore minerals associated are chromite, pynte, pyrrhotite and rutile. The discovery has opened up new vistas for seeking Proterozoic unconformity related uranium mineralisation at the base of Neo-Proterozoic Penganga sediments in the PG Basin, Andhra Pradesh.Keywords
PG Basin, Penganga, Fuchsite Quartzite, Unconformity, Kaddam, Mysemgutta, Andhra Pradesh.- Cyclic Sedimentation and Classification of the Papaghni Group of Sediments, Cuddapah Basin, Andhra Pradesh
Abstract Views :183 |
PDF Views:2
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, 6-3-124, Hastinapuri, Secundarabad - 500 094, IN
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, 6-3-124, Hastinapuri, Secundarabad - 500 094, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 3 (2008), Pagination: 363-370Abstract
The Mesoproterozoic Papaghni Group in the Cuddapah basin of southern Andhra Pradesh comprises mainly arenaceous, argillaceous and calcareous sediments. These sediments occur in sequences that are mappable on large scale (15000) and the sequences are idenified by unconfornities which are recognised by conglomerate/breccia beds in Vempalle Formation (Papaghni Group). Each sequence starts with near shore arenaceous and argillaceous sediments and ends up with relatively deeper marine chemical precipitate, viz dolomitic sediment, with these three constituting one cycle of sediments. The thickness of each cycle ranges from about twenty meters to hundreds of meters and three such cycles of sedimentation are identified. On the basis of the identification of cyclic sedimentation and bounding unconfornuties it is proposed that the Vempalle Formation of Papaghni Group may be classified into Lower, Middle and Upper members, which denote recurrence of similar depositional settings during the Vempalle sedimentation.Keywords
Cyclic Sedimentation, Papaghni Group, Cuddapah Basin, Andhra Pradesh.- Uranium Mineralization in Palaeoproterozoic Khetabari Formation, Bomdila Group, Sie-Rimi Area, West Siang District, Arunachal Pradesh
Abstract Views :310 |
PDF Views:98
Authors
Bhaskar Basu
1,
Manish Sharma
1,
C. S. Gupta
2,
S. Thippeswamy
1,
A. V. Jeyagopal
1,
G. B. Joshi
1,
R. Mohanty
3
Affiliations
1 Department of Atomic Energy (DAE), Shillong 793 019, IN
2 DAE, New Delhi 110 066, IN
3 DAE, Hyderabad 500 016, IN
1 Department of Atomic Energy (DAE), Shillong 793 019, IN
2 DAE, New Delhi 110 066, IN
3 DAE, Hyderabad 500 016, IN
Source
Current Science, Vol 108, No 7 (2015), Pagination: 1216-1218Abstract
No Abstract.- Occurrence of Uranium in Metasedimentary Enclaves Within Basement Granite, Near Peddur and Kottur, Karimnagar District, Andhra Pradesh
Abstract Views :194 |
PDF Views:0
Authors
Affiliations
1 Atomic Mineral Directorate for Exploration and Research, Begumpet, Hyderabad - 560 629, IN
2 Atomic Mineral Directorate for Exploration and Research, North Eastern Region, Shillong - 793 011, IN
1 Atomic Mineral Directorate for Exploration and Research, Begumpet, Hyderabad - 560 629, IN
2 Atomic Mineral Directorate for Exploration and Research, North Eastern Region, Shillong - 793 011, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 3 (2010), Pagination: 247-250Abstract
Several radioactive anomalies due to uranium and thorium, associated with the mesedimentary enclaves (Archaean) within granite (Archaean to Early-Proterozoic) have been recorded in parts of Karimnagar Granulite Terrain, Karimnagar Dist. At Peddur and Kottur, Uraninite has been identified in the samples of metasediments. The metasediment from these two places have been subjected to granulite facies of metamorphism and host high values of uranium with negligible thorium. In Peddur, samples of metasediments have assayed as high as 1.96% U3O8 with negligible thorium, and in Kottur up to 0.059% U3O8. Leaching studies on these samples have indicated that most of the U3O8 present is leachable. This discovery has opened up the possibility of finding uranium mineralisation in Archaean metasediments and thus provides a thrust for uranium exploration in similar geological environs in India. Further, the basement granite along with the metasedimentary enclaves has the potential to act as a provenance for a possible unconformity type or sandstone type U-deposit in the rocks of overlying Pakhal and Gondwana Supergroup, in Pranhita-Godavari Basin, situated to the east of this area.Keywords
Uraninite, Karimnagar Granulite Terrain, Metasediment, Peddur, Kottur, Andhra Pradesh.- Sulphur Isotopic Study on the Vein-Type Baryte from Vemula in the Vempalle Formation of Cuddapah Basin, Andhra Pradesh
Abstract Views :183 |
PDF Views:2
Authors
Affiliations
1 Atomic Minerals Division, Department of Atomic Energy, Bangalore - 560072, IN
2 Atomic Minerals Division, Department of Atomic Energy, Hyderabad - 500016, IN
1 Atomic Minerals Division, Department of Atomic Energy, Bangalore - 560072, IN
2 Atomic Minerals Division, Department of Atomic Energy, Hyderabad - 500016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 49, No 6 (1997), Pagination: 693-698Abstract
Baryte at Vemula near to the southwestern margin of Cudapah Basin occurs as a vein-type deposit discordant to both the carbonate rocks of Vempalle formation and its intrusive dolerite. S-isotopic data on the baryte have a range of δ34SCDT between +16.2‰ and +23.3‰ whereas the coexisting chalcopyrite has a restricted range between +10.9‰ and +11.4‰. The average value of δ34S of Vemula baryte (+20.8‰) differs much from that of magmatic rocks (0‰ to +2.5‰), metamorphic rocks (+3‰) and sediments of continental margins, platform areas and geosynclines (-12.5‰ -17,1‰), but is similar to that of sea water (+20‰) which appears to be the source for sulphur. The narrow range of δ34S of baryte and chalcopyrite points to a uniform source with their sulphur possibly derived from sea water sulphate by bacteriogenic reduction.Keywords
Economic Geology, Baryte, Sulphur Isotope, Cuddapah Basin, Andhra Pradesh.- Uranium Mineralization in Kappatralla Outlier of Gulcheru Quartzite Formation, Mesoproterozoic Cuddapah Supergroup, Kurnool District, Andhra Pradesh, India
Abstract Views :264 |
PDF Views:89
Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Hyderabad 500 016, IN
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Hyderabad 500 016, IN
Source
Current Science, Vol 116, No 8 (2019), Pagination: 1294-1298Abstract
In the eastern Dharwar craton, the crescent- shaped Cuddapah Basin forms a large intracratonic basin, comprising Meso–Neoproterozoic sedimentary sequence with volcanic rock components. The sedimentary environment of the Cuddapah Basin, in general, is comparable with peri-tidal complex with shallow marine carbonate shelf and beach environment. Systematic geological studies of the Cuddapah Basin are well documented1,2. The litho-units of the basin are mainly divided into older Cuddapah Supergroup and a younger Kurnool Group. The former is present throughout the basin, while the younger group is seen in its western and northeastern parts. The sediments of the basin overlie the Late Archaean–Lower Proterozoic granitoids intruded by basic and ultrapotassic dykes.References
- King, W., Mem. Geol. Surv. India, 1872, 8, 346.
- Nagaraja Rao, B. K., Rajurkar, S. T., Ramalinga Swamy, G. and Ravindar Babu, B., Mem. Geol. Soc. India, 1987, 6, 33–86.
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- Bhopal Reddy, A. and Rao, K. S., District Resource Map of Kurnool district, AP, Geological Survey of India, 1999,
- Darnley, A. G., In Uranium in Granites, (ed. Maurice, Y. T.), Geological Survey of Canada, 1982, Paper 81-23, pp. 1–10.
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- Breger, I. A. and Deul, M., International Conference on Peaceful Uses of Atomic Energy (Proceedings of Conference Geneva, 1955–56), UN, New York, USA, 1956, p. 418.