Abstract
Th, U and K abundances in four alkali granites of the Kerala region, south-west India, are presented. The plutons show high radioelement levels, correlatable with those of alkali granites in other regions. The nature of variation is consistent with the correlation of Th and U with accessory phases like sphene, zircon, allanite, apatite and monazite. A geochronologic correlation is also observed between the alkali granites and the Th-bearing beach placers of the region. The petrogenetic features of the alkali plutons, their taphrogenic association, Pan-African affiliation and high Th/U levels suggest that the alkali plutons are favourable locales for radioelement exploration.
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References
Collerson K D 1982Contrib. Mineral. Petrol. 81 126
Croudace I W 1982Geochim. Cosmochim. Acta 46 609
Drysdall A R, Norman J J, Ramsay C R, Douch C J and Hackett D 1984Econ. Geol. 79 1366
Holmes A 1955Proc. Geol. Assoc. Can. 7 342
Jackson N J, Walsh J N and Pegram E 1984Contrib. Mineral Petrol. 87 205
Nair N G K and Santosh M 1984J. Geol. Soc. India 25 35
Nair N G K, Santosh M and Thampi P K 1983Neues Jahrb. Mineral, Abh. 148 223
Nair N G K, Santosh M, Thampi P K and Balasubramonian G 1982Q. J. Geol. Min. Metall. Soc. India 54 28
O’Conner P J, Reeves T and Hennessy J 1981Bull. Geol. Surv. Ireland 3 9
O’Conner P J, Hennessy J, Bruck P M and Williams C T 1982Geol. Mag. 119 581
Odom A L 1982 U N Case No. 81-10084, 10 pp
Parthasarathy R and Sankardas M 1976J. Geol. Soc. India 17 262
Ragland P C and Rogers J J W 1980J. Geochem. Explor. 13 181
Reddy G R, Pant D R and Sankardas M 1983 S M Naqvi and J J W Rogers (eds)Geol. Soc. India, Mem. 4 329
Rogers J J W and Adams J A S 1969 (ed.) K H Wedepohlin Handbook of geochemistry (Berlin: Springer-Verlag) Vol. II-3, 92-B-1 to 92-0-8 and 90-B-1 to 90-0-5
Rogers J J W and Greenberg J K 1981Bull. Geol. Soc. Am. 92 57
Rogers J J W, Ragland P C, Nishimori R K, Greenberg J K and Hauck S A 1978Econ. Geol. 73 1539
Santosh M 1984Neues Jahrb Mineral. Monatsh. 6 241
Santosh M 1985aJ. Geol. Soc. India (in press)
Santosh M 1985bJ. Geol. Soc. India 26 695
Santosh M and Nair N G K 1983aJ. Geol. Soc. India 24 291
Santosh M and Nair N G K 1983bProc. Indian Acad. Sci. (Earth Planet. Sci.) 92 297
Santosh M, Nair N G K, Pande K and Gopalan K 1985J. Geol. Soc. India (in press)
Santosh M and Thara K G 1985Proc. Indian Acad. Sci. (Earth Planet. Sci.) 94 43
Soman K, Santosh M and Golubyev V N 1983Indian J. Earth Sci. 10 137
Streckeisen A L 1976Earth Sci. Rev. 12 1
Wilson M R and Akerblom G V 1982Mineral. Mag 46 233
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Santosh, M., Kumar, K.V. Radioelement geochemistry of alkali granites of the Kerala region, south-west India. Proc. Indian Acad. Sci. (Earth Planet. Sci.) 95, 103–115 (1986). https://doi.org/10.1007/BF03029175
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DOI: https://doi.org/10.1007/BF03029175