| dc.creator | Santosh M. | |
| dc.creator | Iyer S.S. | |
| dc.creator | Vasconcellos M.B.A. | |
| dc.creator | Enzweiler J. | |
| dc.date | 1989 | |
| dc.date | 2015-06-30T13:41:51Z | |
| dc.date | 2015-11-26T14:37:39Z | |
| dc.date | 2015-06-30T13:41:51Z | |
| dc.date | 2015-11-26T14:37:39Z | |
| dc.date.accessioned | 2018-03-28T21:42:03Z | |
| dc.date.available | 2018-03-28T21:42:03Z | |
| dc.identifier | | |
| dc.identifier | Lithos. , v. 24, n. 1, p. 65 - 79, 1989. | |
| dc.identifier | 244937 | |
| dc.identifier | 10.1016/0024-4937(89)90016-9 | |
| dc.identifier | http://www.scopus.com/inward/record.url?eid=2-s2.0-0024940728&partnerID=40&md5=bc78b4ffd62219a07a336088ab7c74da | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/98367 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/98367 | |
| dc.identifier | 2-s2.0-0024940728 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1249206 | |
| dc.description | The Precambrian granulite facies terrain of southwestern India is intruded by a suite of alkali granite and syenite plutons. RbSr whole-rock isotope data for the Angadimogar syenite (AM) and the Peralimala alkali granite (PM), belonging to this suite, define isochron ages of 638 ± 28 and 750 ± 40 Ma, respectively, with initial 87Sr86Sr ratios of 0.7032 ± 0.0008 and 0.7031 ± 0.0008, respectively. These age data, together with data from previous studies, demonstrate long-lived magmatic activity in the time span from the late Proterozoic to the early Palaeozoic, broadly contemporaneous with Pan-African events in other fragments of the Gondwana supercontinent. REE patterns are reported for four plutons of this Pan-African alkali granite-syenite suite: Chengannoor (CR), Vellingiri (VL) and the two dated intrusions (AM and PM). CR and AM are characterised by high total REE, strongly LREE-enriched patterns with no Eu anomaly, associated with low Sr, Rb, U and Th. K2O, K2O Na2O, K2O MgO and the agpaitic index are lower for these plutons as compared to the other two. The PM and VL intrusions have lower total REE and less strongly fractionated REE patterns, associated with high K2O, K2O Na2O and K2O MgO ratios, high Sr and Rb levels, but low U and Th. The geochemical patterns in these rocks compare them well with A-type granites and their tectonic relations assign affinities to magmatism of within-plate type. The alkaline magmatism manifests an extensional phase associated with the pre-rift tectonics of the Indian continent within the Gondwana assemblage. A petrogenetic model is development for these plutons, involving decompression-induced melting of deep crustal source materials characterised by low initial 87Sr86Sr and high K Rb ratios. © 1989. | |
| dc.description | 24 | |
| dc.description | 1 | |
| dc.description | 65 | |
| dc.description | 79 | |
| dc.description | Arth, Behaviour of trace elements during magmatic processes — a summary of theoretical models and their applications (1976) J. Res. U.S. Geol. Surv., 4, pp. 41-47 | |
| dc.description | Bailey, Origin of alkaline magmas as a result of anatexis (1974) The Alkaline Rocks, pp. 436-441. , H.S. Sørensen, Wiley, New York, N.Y | |
| dc.description | Barker, Wones, Sharp, Desborough, The Pikes Peak batholith, Colorado Front Range and a model for the origin of gabbro-anorthosite-syenite-potassic granite suite (1975) Precambrian Res., 1, pp. 97-160 | |
| dc.description | Barker, Arth, Peterman, Friedman, The 1.7–1.8 b.y. old trondhjemites of south-western Colorado and northern New Mexico — geochemistry and depths of genesis (1976) Geol. Soc. Am. Bull., 87, pp. 189-198 | |
| dc.description | Borodin, Gopal, Moralev, Subramanian, Ponikarov, Precambrian carbonatites of Tamil Nadu, south India (1971) Geol. Soc. India, 12, pp. 101-112 | |
| dc.description | Bowden, Oversaturated alkaline rocks, granites, pantellerites and comendites (1974) The Alkaline Rocks, pp. 109-123. , H. Sørensen, Wiley, New York, N.Y | |
| dc.description | Bowden, Whitley, Rare earth patterns in peralkaline and associated granites (1974) Lithos, 7, pp. 15-21 | |
| dc.description | Brooks, Hart, Wendt, Realistic use of two error regression treatments as applied to rubidium-strontium data (1977) Reviews of Geophysics, 10, pp. 551-577 | |
| dc.description | Collins, Beams, White, Chappell, Nature and origin of A-type granites with particular reference to south-eastern Australia (1982) Contrib. Mineral. Petrol., 80, pp. 189-200 | |
| dc.description | Croudace, The geochemistry and petrogenesis of the lower Palaeozoic granitoids of the Llyen Peninsula, North Wales (1982) Geochim. Cosmochim. Acta, 46, pp. 609-622 | |
| dc.description | Cullers, Graff, Rare earth elements in igneous rocks of the continental crust: Predominantly basic and ultrabasic rocks (1984) Rare Earth Element Geochemistry, pp. 237-274. , P. Henderson, Elsevier, Amsterdam | |
| dc.description | Deans, Powell, Trace elements and strontium isotopes in carbonatites, fluorites and limestones from India and Pakistan (1968) Nature (London), 218, pp. 750-752 | |
| dc.description | Drury, Harris, Holt, Reeves-Smith, Wightman, Precambrian tectonics and crustal evolution in south India (1984) J. Geol., 92, pp. 3-20 | |
| dc.description | Furnes, Mitchell, Robins, Ryan, Skjerlie, Petrography and geochemistry of peralkaline, ultrapotassic syenite dykes of Middle Permian age, Sunnfjord, west Norway (1982) Nor. Geol. Tiddskr., 62, pp. 142-159 | |
| dc.description | Gass, Pan-African (Upper Proterozoic) plate tectonics of the Arabian-Nubian shield (1981) Precambrian Plate Tectonics, pp. 385-405. , A. Kröner, Elsevier, Amsterdam | |
| dc.description | Grady, Deep main faults in south India (1971) J. Geol. Soc. India, 12, pp. 56-62 | |
| dc.description | Greenberg, Characteristics and origin of Egyptian younger granites (1981) Geol. Soc. Am. Bull., 92, pp. 749-840. , Part II | |
| dc.description | Hansen, Janardhan, Newton, Prame, Kumar, Arrested charnockite formation in southern India and Sri Lanka (1987) Contributions to Mineralogy and Petrology, 86, pp. 225-244 | |
| dc.description | Hanson, The application of trace elements to the petrogenesis of igneous rocks of granitic composition (1978) Earth and Planetary Science Letters, 53, pp. 26-43 | |
| dc.description | Harris, Marriner, Geochemistry and petrogenesis of a peralkaline granite complex from the Midian mountains Saudi Arabia (1980) Lithos, 13, pp. 325-337 | |
| dc.description | Harris, Holt, Drury, Geobarometry, geothermometry and late Archaean geotherms from the granulite facies terrain of south India (1982) J. Geol., 90, pp. 509-527 | |
| dc.description | Harris, Mohammed, Shaddad, Geochemistry and petrogenesis of a nepheline syenite-carbonatite complex from the Sudan (1983) Geol. Mag., 120, pp. 115-127 | |
| dc.description | Iyer, Santosh, Late Proterozoic RbSr ages from the cordierite gneiss-charnockite terrain of Kerala, south India (1990) Precambrian Res., , (in press) | |
| dc.description | Iyer, Chaudhuri, Cordani, Vasconcellos, Radioactive element distribution on the Archaean granulite terrane of Jequie Bahia, Brazil (1984) Contrib. Mineral. Petrol., 85, pp. 95-101 | |
| dc.description | Jackson, Walsh, Pegram, Geology, geochemistry and petrogenesis of late Precambrian granitoids in the Central Hijaz region of the Arabian shield (1984) Contrib. Mineral. Petrol., 87, pp. 205-219 | |
| dc.description | Jann, Auvray, Blais, Capdevila, Cornichet, Hameurt, Trace element geochemistry and petrogenesis of Finnish greenstone belts (1980) Journal of Petrology, 21, pp. 201-244 | |
| dc.description | Kakazu, Stato, Moraes, Shihomutsu, Iyer, Precisão e exatidão na espectrometro de massa aermoionica aquisicao de dados com microcomputador (1986) Mass Spectrometry, Rio de Janeiro, , (abstract) | |
| dc.description | Katz, Tectonic evolution of the Archaean granulite facies belt of Sri Lanka and South India (1978) J. Geol. Soc. India, 19, pp. 185-205 | |
| dc.description | Kennedy, The structural differentiation of Africa in the Pan-African (±500 m.y.) tectonic episode (1964) Res. Int. Afr. Geol., Univ. of Leeds, 8th Annu. Rep., pp. 48-49 | |
| dc.description | Kröner, Pan-African mobile belts as evidence for a transitional tectonic regime from intraplate orogeny to plate margin orogeny (1979) Evolution of the Arabian-Nubian Shield, 1, pp. 21-37. , S.A. Tahoun, Pergamon, Oxford | |
| dc.description | Kröner, Pan-African crustal evolution (1980) Episode, 2, pp. 3-8 | |
| dc.description | Kröner, Precambrian plate-tectonics (1981) Precambrian Plate Tectonics, pp. 57-90. , A. Kröner, Elsevier, Amsterdam | |
| dc.description | Loiselle, Wones, Characteristics and origin of anorogenic granites (1979) Geol. Soc. Am., Annu. Meet., Abstr. Progr., 11, p. 468 | |
| dc.description | Murthy, Venkataraman, Petrogenetic significance of certain platform peralkaline granites of the world (1964) The Upper Mantle Symposium I.V.G.S. Publ., pp. 127-149. , C.H. Smith, T. Sorgenfrei, New Delhi | |
| dc.description | Nair, Santosh, Petrochemistry of the granite and granophyre complex, Kerala, India (1983) Proc. Indian Acad. Sci. (Earth Planet. Sci.), 92, pp. 129-140 | |
| dc.description | Nair, Santosh, Petrochemistry and tectonic significance of the Peralimala alkali granite Cannanore district, Kerala (1984) J. Geol. Soc. India, 25, pp. 35-44 | |
| dc.description | Nair, Vidyadharan, Rapakivi granite of the Ezhimala complex and its significance (1982) J. Geol. Soc. India, 23, pp. 46-51 | |
| dc.description | Nair, Soman, Santosh, Arkelyants, Golubyev, KAr ages of three granite plutons from north Kerala (1985) J. Geol. Soc. India, 26, pp. 674-676 | |
| dc.description | Odom, Isotopic age determinations of rock and mineral samples from Kerala, India (1982) U.N.New York, N.Y., Case No. 81-10084, , (unpublished) | |
| dc.description | Pearce, Harris, Tindle, Trace element discrimination diagrams for the tectonic interpretation of granitic rocks (1984) J. Petrol., 25, pp. 956-983 | |
| dc.description | Pitcher, Granite type and tectonic environment (1982) Mountain Building Processes, pp. 19-40. , K.J. Hsü, Academic Press, London | |
| dc.description | Rogers, Greenberg, Trace elements in continental margin magmatism, III. Alkali granites and their relationship to cratonization (1981) Geol. Soc. Am. Bull., 92, pp. 57-93 | |
| dc.description | Santosh, Carbonic metamorphism of charnockites in the southwestern Indian shield: a fluid inclusion study (1986) Lithos, 19, pp. 1-10 | |
| dc.description | Santosh, Cordierite gneisses of southern Kerala, India: Petrology, fluid inclusions and implications for crustal uplift history (1987) Contrib. Mineral. Petrol., 96, pp. 343-356 | |
| dc.description | Santosh, Alkaline plutons, decompression granulites and late Proterozoic CO2 influx in South India (1990) Mem. Geol. Soc. India, 15. , (in press) | |
| dc.description | Santosh, Drury, Alkali granites with Pan-African affinities from Kerala, south India (1988) J. Geol., 96, pp. 616-622 | |
| dc.description | Santosh, Nair, Petrochemistry of the Chengannoor granite, Alleppey district, Kerala (1983) J. Geol. Soc. India, 24, pp. 291-298 | |
| dc.description | Santosh, Nair, Pande, Gopalan, RbSr geochronology of the Ambalavayal granite, Kerala (1986) J. Geol. Soc. India, 27, pp. 309-312 | |
| dc.description | Soman, Santosh, Golubyev, Early Palaeozoic I-type granite from central Kerala and its bearing on possible mineralization (1983) Indian J. Earth Sci., 10, pp. 137-141 | |
| dc.description | Srikantappa, Raith, Spiering, Progressive charnockitization of a leptynite-khondalite suite in southern Kerala, India — evidence for formation of charnockites through decrease in fluid pressure (1985) J. Geol. Soc. India, 26, pp. 849-872 | |
| dc.description | Steiger, Jäger, Subcommission on Geochronology: Convention on the use of decay constants in geo- and cosmo-chronology (1977) Earth Planet. Sci. Lett., 36, pp. 359-362 | |
| dc.description | Streckeisen, To each plutonic rock its proper name (1976) Earth Sci. Rev., 12, pp. 1-33 | |
| dc.description | Sukhesvala, Viladkar, Carbonatites of India (1978) Proc. 1st Int. Symp. on Carbonatites, pp. 277-293. , São Paulo | |
| dc.description | Taylor, Strong, Kean, The Topsails igneous complex: Silurian-Devonian peralkaline magmatism in western Newfoundland (1980) Can. J. Earth Sci., 17, pp. 425-439 | |
| dc.description | Vasconcellos, Luna, Activation analysis of alkaline rocks — a comparison between destructive and non-destructive methods (1978) J. Radioanal. Chem., 44, pp. 55-81 | |
| dc.description | Wendlandt, Harrison, Rare earth partitioning between immiscible carbonate and silicate liquids and CO2 vapor: results and implications for the formation of light rare earth enriched rocks (1979) Contrib. Mineral. Petrol., 69, pp. 409-419 | |
| dc.description | White, Source of granite magmas (1979) Geol. Soc. Am., Abstr. Progr., 11, p. 539 | |
| dc.description | York, Least squares fitting of a straight line with correlated errors (1969) Earth and Planetary Science Letters, 5, pp. 320-324 | |
| dc.language | en | |
| dc.publisher | | |
| dc.relation | LITHOS | |
| dc.rights | fechado | |
| dc.source | Scopus | |
| dc.title | Late Precambrian Alkaline Plutons In Southwest India: Geochronologic And Rare-earth Element Constraints On Pan-african Magmatism | |
| dc.type | Artículos de revistas | |
