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Basu, Himadri
- A Discussion on the Physico-Chemical Factors for the Development of Pits in Gulcheru Quartzite in the Southwestern Margin of Cuddapah Basin, A. P.
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Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Bangalore-560072, IN
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad-500016, IN
1 Atomic Minerals Directorate for Exploration and Research, Bangalore-560072, 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: 467-470Abstract
Miniature pits of varying size and shape are found in the topmost arenaceous layers of the Gulcheru quartzite. Though pits in sedimentary rocks form in a variety of ways, in clean beach sands they owe their origin to mainly physical processes. Small pits, found in the Gulcheru quartzite, have been formed as a result of interplay of difierent physico-Chemical factors which prevailed in syn- as well as post-Depositional environments. In addition to different agents of physical weathering, which played a vital role in the formation of pits in the Gulcheru quartzite, syn-depositional precipitation of iron oxides and their syn-to post-diagenetic chemical changes are believed to be the main chemical factors.Keywords
Pits, Ferric-Hydroxide, Gulcheru Quartzite, Cuddapah Basin, Andhra Pradesh.- Sedimentary Facies of Gulcheru Quartzite in the Southwestern Part of the Cuddapah Basin and their Implication in Deciphering the Depositional Environment
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Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Nagarbhavi, Bangalore 560 072, IN
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Nagarbhavi, Bangalore 560 072, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No 2 (2007), Pagination: 347-358Abstract
Middle Proterozoic Gulcheru Quartzite marks the onset of sedimentation, after the Eparchaean unconforrnity, in the Cuddapah Basin. In the southwestern margin of the basin it is made up dominantly of orthoquartzites. On the basis of lithology, stratigraphic relationship, bedding characteristics, texture and colour of sediments and sedimentary structures, five lithofacies were recognized within Gulcheru Quartzite. The Gulcheru Quartzite, though dominantly of shallow marine origin, shows imprints of other depositional regimes. Detailed interpretation of the facies and study of their field relationships reveal that pink massive quartzite, the lowermost unit of Gulcheru Quartzite, is of fluvio-aeolian origin. Later marine transgression .led to the development of a moderate to low energy beach, which evolved with time into a barrier: spit complex.Keywords
Depositional environment, Facies analysis, Fluvio-Aeolian, Barrier-Spit, Gulcheru Quartzite, Cuddapah Basin, Andhra Pradesh.- Geological and Geochemical Aspects of the Gulcheru Formation in the Southwestern Margin of the Cuddapah Basin and its Potentiality for Uranium Mineralisation
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Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad - 500 016, IN
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 4 (2007), Pagination: 686-688Abstract
No Abstract.- Uranium Mineralisation in the Mesoproterozoic Quartzites of Cuddapah Basin in Gandi area, Cuddapah District, Andhra Pradesh: A New Exploration Target for Uranium
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Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Bangalore-560 072, IN
2 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, Bangalore-560 072, IN
2 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 57, No 5 (2001), Pagination: 405-409Abstract
Significant uranium occurrences are discovered recently for the first time in the Gulcheru Quartzite of Papaghni Group of Cuddapah Supergroup near Gandi, east of Papaghni river, Cuddapah District, A.P. Mineralisation is associated with an E-W fault. Friable whitish to light pink quartzite is the main host rock of uranium. Mineralisation occurs in the form of lensoidal bodies having dimensions of 20 - 200 m x 2 - 10 m in an E-W fault scarp section, over 2 km in length. Dip section is also mineralised. Samples have revealed anomalous concentrations of uranium, up to 1.441% U3O8 with negligible thorium. Concentration of Ni (<25 to 1033 ppm), Mo (<25 to 643 ppm), Pb (33 to 1515 ppm) and Cu (<25 to 170 ppm) points to the economic potentiality of the area. Petrological studies have identified uranium minerals such as pitchblende, uraninite and coffinite as fracture fillings and disseminations in the chlorite-sericite matrix of quartzite. The associated ore minerals are chalcopyrite, arsenopyrite, pyrite and limonite. These findings have important implications in the selection of new exploration targets for uranium in the basal beds of Cuddapah Supergroup unconformably overlying the fertile granitoid basement in the Eastern Dharwar Craton occurring in the southwestern part of Cuddapah basin.Keywords
Uranium Mineralisation, Gulcheru Quartzite, Cuddapah Basin, Andhra Pradesh, Dharwar Craton.- Study of Provenance Characteristics and Depositional History on the Basis of U, Th and K Abundances in the Gulcheru Formation, Cuddapah Basin in Tummalapalle-Somalollapalle Areas, Cuddapah-Anantapur Districts, Andhra Pradesh
Abstract Views :220 |
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Authors
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad - 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Jamshedpur - 831 002, IN
3 Atomic Minerals Directorate for Exploration and Research, Bangalore - 560 072, IN
1 Atomic Minerals Directorate for Exploration and Research, Hyderabad - 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Jamshedpur - 831 002, IN
3 Atomic Minerals Directorate for Exploration and Research, Bangalore - 560 072, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 3 (2009), Pagination: 318-328Abstract
Provenance studies on the basis of U, Th and K reveal that the sediments of the Gulcheru Formation were derived from a minor heterogeneous but dominantly granitoid provenance, which often underwent moderate chemical weathering. Mixing of reworked and heavy mineral bearing matured sediments with newly generated detritus took place at different times. Sedimentation took place in three different phases. Initially the sediments were deposited in fluvioaeolian environment. Later, subsidence of the depo-centre along basinal growth faults led to the transgression of seawater over earlier sediments. The last phase of the sedimentation history continued in the marginal marine domain. The depocentre most possibly experienced semi-arid climate.Keywords
U, Th And K Abundances, Provenance Characteristics, Depositional History, Gulcheru Formation, Cuddapah Basin, Andhra Pradesh.References
- ADAMS, J.A.S. and WEAVER, E. (1958) Thorium to uranium ratios as indicators of sedimentary process: example of concept of geochemical facies. AAPG Bull., v.42, pp.387-430.
- BASU, H. (2007) Geological and geochemical aspects of The Gulcheru Formation in the southwestern margin of the Cuddapah Basin and its potentiality for Uranium Mineralization. Jour. Geol. Soc. India, v.70, No.4, pp.686-688.
- BASU, H., GANGADHARAN, G.R., KUMAR, S., SHARMA, U.P., RAI, A.K. and CHAKI, A. (2007) Sedimentary Facies of The Gulcheru Quartzite in the Southwestern Part of the Cuddapah Basin and their Implication in Deciphering the Depositional Environment. Jour. Geol. Soc. India, v.69, pp.347-358.
- BAULUZ, B., MAYAYO, M.J., FERNANDEZ-NIETO, C. and GONZALEZ LOPEZ, J.M. (2000) Geochemistry of Precambrian and Palaeozoic siliciclastic rocks from the Iberian Range (NE Spain): implications for source-area weathering, sorting, provenance, and tectonic setting. Chem. Geol., v.168, pp.135-150.
- BHAT, M.I. and GHOSH, S.K. (2001) Geochemistry of 2.51 Ga old Rampura Group pelites, western Himalayas: implications for their provenance and weathering. Precambrian Res., v.108, pp.1-16.
- BHATIA, M.R. (1983) Plate tectonics and geochemical composition of sandstones. Jour. Geol., v.91, pp.611-627.
- BOYLE, R.W. (1982) Geochemical prospecting for thorium and uranium deposits. Dev. Econ. Geol., Elsevier, Netherlands, 16, 498p.
- CONDIE, K.C. (1991) Another look at rare earth elements in shales. Geochem. Cosmochem. Acta, v.35, pp.2527-2531.
- CONDIE, K.C. (1993) Chemical composition and evolution of the upper continental crust: contrasting results from surface samples and shales. Chem. Geol., v.104, pp.1-37.
- DOVETON, J.D. (1991) Lithofacies and geochemical facies profiles from nuclear wireline logs: new subsurface templates for sedimentary modelling. In: E.K. Franseen, W.L. Watney, C.J. Kendall and W. Ross (Eds.), Sedimentary modelling-computer simulations and methods for improved parameter definition. Kansas Geol. Soc. Bull., v.233, pp.101-110.
- FEDO, C.M., NESBITT, H.W. and YOUNG, G.M. (1995) Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for palaeoweathering conditions and provenance. Sedimentology, v.23, pp.921-924.
- HASSAN, M., HOSSIN, A. and COMBAZ, A. (1976) Fundamentals of the differential gamma ray log interpretation technique. SPWLA 17th Ann. Symp., Pap.8, pp.1-7.
- IAEA TECHNICAL REPORT SERIES (1992) Analytical Techniques in Uranium Exploration and Ore Processing. Report No. 341, 187p.
- KALE, V.S. (1995) Association of the Purana basins and the Middle Proterozoic mobile belts in Peninsular India: implications on targeting uranium deposits. EARFAM. v.8, pp.95-110.
- KOBRANOVA, V. N. (1989) Petrophysics. Springer Verlag, 375p.
- MCLENNAN, S.M. (1989) Rare earth elements in sedimentary rocks: Influence of provenance and sedimentary processes. In: B.R. Lipin and G.A. McKay (Eds.), Geochemistry and Mineralogy of REE. Reviews in Mineralogy, v.2, pp.169-200.
- MCLENNAN, S.M., HEMMING, S., MCDANIEL, D.K. andHANSON, G.N. (1993) Geochemical approaches to sedimentation, provenance and tectonics. In: M.J. Johnson and A. Basu (Eds.), Processes Controlling the Composition of Clastic Sediments. Geol. Soc. Amer. Spec. Paper No.284, pp.21-40.
- MCLENNAN, S.M., HEMMING, S., TAYLOR, S.R. and ERIKSON, K.A. (1995) Early Proterozoic crustal evolution: Geochemical and Nd-Pb isotopic evidence from metasedimentary rocks southwestern North America. Geochem. Cosmochem. Acta, v.59, pp.1153-1177.
- MYERS, K.J. and WIGNALL, P.B. (1987) Understanding Jurassic organic-rich mudrocks - new concepts using gamma-ray spectrometry and palaeoecology: examples from the Kimmeridge Clay of Dorset and the Jet Rock of Yorkshire. In: J.K. Leggett and G.G. Zuffa (Eds.), Marine clastic sedimentology: concepts and case studies: a volume in memory of C. Tarquin Teale. Graham and Trotman, London, pp.172-189.
- NAQVI, S.M., SAWKAR, R.H., SUBBA RAO, D., GOVIL, P.K. and RAO, T.G. (1988) Geology, geochemistry and tectonic setting of Archaean Greywacke from Karnataka nucleus, India. Precambrian Res., v.39, pp.193-216.
- PETTIJOHN, F.J. (1957) Sedimentary rocks. Harper and Row, New York, 718p.
- RAZA, M., CASSHYAP, S.M. and KHAN, A. (2002) Geochemistry of Mesoproterozoic Lower Vindhyan Shales from Chittaurgarh, Southeastern Rajasthan and its bearing on source rock composition, palaeoweathering conditions and tectonosedimentary environments. Jour. Geol. Soc. India, v.60, pp.505-518.
- REDDY, V.P., REDDY, N.S. and PRASAD, C.V.R.K. (1990) Quartzites of the Cuddapah Group and their environment of deposition. Jour. Geol. Soc. India, v.35, pp.408-420.
- RIDER, M. (1996) The Geological Interpretation of Well Logs. Gulf Publishing Company, pp.67-90.
- ROUT, G.B. (2002) Radiometric measurements. In: R. Sreehari and C.V.R. Sarma (Eds.), Orientation Course for Physicists, AMD, Hyderabad. T-25, 125p.
- TAYLOR, S.R. andMCLENNAN, S.M. (1985) The Continental Crust: Its Composition and Evolution. Blackwell, London, 311p.
- VAN BUCHEM, F.S.P., MELNYK, D.H. and MCCAVE, I.N. (1992) Chemical cyclicity and correlation of Lower Lias mudstones using gamma ray logs, Yorkshire, UK. Jour. Geol. Soc., v.149, pp.991-1002.
- WRIGHT, J.S. (2004) The role of weathering in the production of quartz silt. International Workshop HWK Delmenhorst 'From Particle Size to Sediment Dynamics', pp.154-158.
- ZELT, F.B. (1985) Paleoceanographic events and lithologic/geochemical facies of the Greenhorn marine event (Upper Cretaceous) examined using natural gamma-ray spectrometry. In: L. Pratt, E.G. Kaufmann and F.B. Zelt (Eds.), Fine-grained deposits and biofacies of the Cretaceous Western Interior Seaway - evidence of cyclic sedimentary processes. Soc. Econ. Paleonto. Mineral., SEPM Field Trip Guidebook No.4. Golden, Colorado, pp.49-59.