Sm-Nd isotopic evidence for Late Mesoproterozoic metamorphic relics in the East African Orogen from the Schirmacher Oasis, East Antarctica

Journal of Geology

Volumn 114, Issue 5, 2006, Pages 615-625

  Ravikant, V ^a  

^a GEOLOGICAL SURVEY OF INDIA   (India)

Author keywords

[No Author keywords available]

Indexed keywords

GEOCHRONOLOGY; GRANULITE FACIES; ISOTOPIC RATIO; METAMORPHIC ROCK; NEODYMIUM ISOTOPE; PROTEROZOIC; SAMARIUM;

AFRICA; ANTARCTICA; EAST AFRICA; EAST ANTARCTICA; QUEEN MAUD LAND; SCHIRMACHER OASIS; SUB-SAHARAN AFRICA;

EID: 33748749085     PISSN: 00221376     EISSN: None     Source Type: Journal    
DOI: 10.1086/506163     Document Type: Article

References (60)

1. Argles, T. W.; Prince, C. I.; Foster, G. L.; and Vance, D. 1999. New garnets for old? cautionary tales from young mountain belts. Earth Planet. Sci. Lett. 12:301-309.
2. Arndt, N. T.; Todt, W.; Chauvel, C.; Tapfer, M.; and Weber, K. 1991. U-Pb zircon age and Nd isotopic composition of granitoids, charnockites and supracrustal rocks from Heimfrontfjella, Antarctica. Geol. Rundsch. 80:759-777.
3. Bauer, W.; Jacobs, J.; Fanning, C. M.; and Schmidt, R. 2003. Late Mesoproterozoic arc and back-arc volcanism in the Heimfrontfjella (East Antarctica) and implications for the palaeogeography at the southeastern-margin of the Kaapvaal-Grunehogna craton. Gondwana Res. 6:449-465.
4. 39Ar, U-Pb and Sm-Nd constraints on the timing of metamorphic events in the Maksyutov Complex, southern Ural Mountains. J. Geol. Soc. Lond. 157:811-822.
5. Blichert-Toft, J., and Frei, R. 2001. Complex Sm-Nd and Lu-Hf isotope systematics in metamorphic garnets from the isua supracrustal belt, West Greenland. Geochim. Cosmochim. Acta 65:3177-3187.
6. Board, W. S.; Frimmel, H. E.; and Armstrong, R. A. 2005. Pan-African tectonism in the Western Maud Belt: PT-T-t path for high-grade gneisses in the H. U. Sverdrupfjella, East Antarctica. J. Petrol. 46:671-699.
7. Bruguier, O.; Bosch, D.; Pidgeon, R. T.; Bryne, D. I.; and Harris, L. B. 1999. U-Pb chronology of the Northampton Complex, Western Australia: evidence for Grenvillian sedimentation, metamorphism and deformation and geodynamic implications. Contrib. Mineral. Petrol. 136:258-272.
8. Christensen, J. N.; Rosenfeld, J. L.; and DePaolo, D. J. 1989. Rates of tectonometamorphic processes from rubidium and strontium isotopes in garnet. Science 244:1465-1469.
9. Christensen, J. N.; Selverstone, J.; Rosenfeld, J. L.; and DePaolo, D. J. 1994. Correlation by Rb_Sr geochronology of garnet growth histories from different structural levels within the Tauern Window, Eastern Alps. Contrib. Mineral. Petrol. 118:1-12.
10. Cohen, A. S.; O'Nions, R. K.; Siegenthaler, R.; and Griffen, L. 1988. Chronology of the pressure-temperature history recorded by a granulite terrain. Contrib. Mineral. Petrol. 98:303-313.
11. Dasgupta, S.; Sengupta, S.; Bose, S.; Fukuoka, M.; and Dasgupta, S. 2001. Polymetamorphism in the Schirmacher Hills granulites, East Antarctica: implications for tectonothermal reworking of an isobarically cooled deep continental crust. Gondwana Res. 4:337-357.
12. Elphick, S. C.; Ganguly, J.; and Loomis, T. P. 1985. Experimental determination of cation diffusivities in aluminosilicate garnets. I. Experimental methods and interdiffusion data. Contrib. Mineral. Petrol. 90:36-44.
13. Engvik, A. K., and Elvevold, S. 2004. Pan-African extension and near-isothermal exhumation of a granulite facies terrain, Dronning Maud Land, Antarctica. Geol. Mag. 141:649-660.
14. Fitzsimons, I. C. W. 1996. Metapelitic migmatites from Brattstrand Bluffs, East Antatctica: metamorphism, melting and exhumation of the mid crust. J. Petrol. 37:395-414.
15. Fitzsimons, I. C. W. 2002. Comparison of detrital zircon ages in the Pinjarra Orogen (WA) and Maud province (Antarctica): evidence for collision of Western Australia with Southern Africa at 1100 Ma. Geol. Soc. Aust. Abstr. 67:228.
16. Fitzsimons, I. C. W. 2003. Proterozoic basement provinces of southern and southwestern Australia, and their correlation with Antarctica. In Yoshida, M.; Windley, B. F.; and Dasgupta, S., eds. Proterozoic East Gondwana: supercontinent assembly and breakup. Geol. Soc. Lond. Spec. Publ. 206:93-130.
17. Ganguly, J.; Tirone, M.; and Hervig, R. L. 1998. Diffusion kinetics of samarium and neodymium in garnet, and a method of determining cooling rates of rocks. Science 281:805-807.
18. Goscombe, B.; Armstrong, R. A.; and Barton, J. M. 1998. Tectonometamorphic evolution of the Chewore Inliers: partial equilibration of high-grade basement during the Pan-African Orogeny. J. Petrol. 39:1347-1384.
19. Gose, W. A.; Helper, M. A.; Conelly, J. N.; Hutson, F. E.; and Dalziel, I. W. D. 1997. Palaeomagnetic data and U-Pb isotopic age determinations from Coats Land, Antarctica: implications for Late Proterozoic plate reconstructions. J. Geophys. Res. 102:7887-7902.
20. Groenewald, P. B., and Hunter, D. R. 1991. Granulites of the northern H. U. Sverdrupfjella, western Dronning Maud Land: metamorphic history from garnet-pyroxene assemblages, coronas and hydration reactions. In Thomson, M. R. A.; Crame, J. A.; and Thomson, J. W., eds. Geological evolution of Antarctica. Cambridge, Cambridge University Press, p. 61-66.
21. Groenewald, P. B.; Moyes, A. B.; Grantham, G. H.; and Krynaw, J. R. 1995. East Antarctic crustal evolution: geological constraints and modeling in western Dronning Maud Land. Precambrian Res. 75:231-250.
22. Hanson, R. E. 2003. Proterozoic geochronology and tectonic evolution of southern Africa. In Yoshida, M.; Windley, B. F.; and Dasgupta, S., eds. Proterozoic East Gondwana: supercontinent assembly and breakup. Geol. Soc. Lond. Spec. Publ. 206:427-463.
23. Harley, S. L. 1989. The origin of granulites: a metamorphic perspective. Geol. Mag. 126:215-247.
24. Harley, S. L. 2003. Archaean-Cambrian crustal development of East Antarctica: metamorphic characteristics and tectonic implications. In Yoshida, M.; Windley, B. F.; and Dasgupta, S., eds. Proterozoic East Gondwana: supercontinent assembly and breakup. Geol. Soc. Lond. Spec. Publ. 206:203-230.
25. Hensen, B. J., and Zhou, B. 1995. Retention of isotopic memory in garnets partially broken down during an overprinting granulite-facies metamorphism: implications for the Sm-Nd closure temperature. Geology 23:225-228.
26. Jacobs, J.; Fanning, C. M.; and Bauer, W. 2003. Timing of Grenville-age vs. Pan-African medium-to high-grade metamorphism in western Dronning Maud Land (East Antarctica) and significance for correlations in Rodinia and Gondwana. Precambrian Res. 125:1-20.
27. Jacobs, J.; Fanning, C. M.; Henjes-Kunst, F.; Olesch, M.; and Paech, H.-J. 1998. Continuation of the Mozambique Belt into East Antarctica: Grenville age metamorphism and polyphase Pan-African high grade events in Central Dronning Maud Land. J. Geol. 106: 385-406.
28. Jacobs, J.; Thomas, R. J.; and Weber, K. 1993. Accretion and indentation tectonics at the southern margin of the Kaapvaal Craton during the Kibaran (Grenville) Orogeny. Geology 21:203-206.
29. Jung, S., and Mezger, K. 2001. Geochronology in migmatites - a Sm-Nd, U-Pb and Rb-Sr study from the Proterozoic Damara Belt (Namibia): implications for polyphase development of migmatization in highgrade terranes. J. Metamorph. Geol. 19: 77-97.
30. Kriegsman, L. M. 1995. The Pan-African event in East Antarctica: a view from Sri Lanka and the Mozambique Belt. Precambrian Res. 75:263-277.
31. Kröner, A., and Cordani, U. 2003. African, southern Indian and South American cratons were not part of the Rodinia supercontinent: evidence from field relationships and geochronology. Tectonophysics 375:325-352.
32. Kusky, T. M.; Abdelsalam, M.; Stern, R. J.; and Tucker, R. D. 2003. Evolution of the East African and related orogens, and the assembly of Gondwana. Precambrian Res. 123:81-85.
33. Ludwig, K. 1991. ISOPLOT: a plotting and regression program for radiogenic isotope data. U.S. Geol Surv. Open File Rep. 91-445.
34. Markl, G., and Piazolo, S. 1998. Halogen-bearing minerals in syenites and high-grade marbles of Dronning Maud Land, Antarctica: monitors of fluid compositional changes during late-magmatic fluid-rock interaction processes. Contrib. Mineral. Petrol. 132:246268.
35. Meert, J. G. 2003. A synopsis of events related to the assembly of eastern Gondwana. Tectonophysics 362: 1-40.
36. Milisenda, C. C.; Liew, T. C.; and Hofmann, A. W. 1994. Nd isotopic mapping of the Sri Lanka basement: update, and additional constraints from Sr isotopes. Precambrian Res. 66:95-110.
37. Milisenda, C. C.; Liew, T. C.; Hofmann, A. W.; and Kröner, A. 1988. Isotopic mapping of age provinces in Precambrian high-grade terrains: Sri Lanka. J. Geol. 96:608-615.
38. Patchett, P. J. 1992. Isotopic evolution of Proterozoic crustal growth and evolution. In Condie, K. C., ed. Proterozoic crustal evolution. Amsterdam, Elsevier, p. 481-508.
39. Pattison, D. R. M. 1991. Infiltration-driven dehydration and anatexis in granulite facies metagabbro, Grenville Province, Ontario, Canada. J. Metamorph. Geol. 9: 315-332.
40. Pinna, P.; Jourde, G.; Calvez, J. Y.; Mroz, J. P.; and Marques, J. M. 1993. The Mozambique Belt in northern Mozambique: Neoproterozoic (1100-850 Ma) crustal growth and tectonogenesis, and superimposed Pan-African (800-550 Ma) tectonism. Precambrian Res. 62: 1-59.
41. Pisarevsky, S.; Wingate, M. T. D.; Powell, C. McA.; Johnson, S.; and Evans, D. A. D. 2003. Models of Rodinia assembly and fragmentation. In Yoshida, M.; Windley, B. F.; and Dasgupta, S., eds. Proterozoic East Gondwana: supercontinent assembly and breakup. Geol. Soc. Lond. Spec. Publ. 206:35-55.
42. Rameshwar Rao, D.; Rashid, S. A.; and Pantulu, G. V. C. 2000. Origin of Mg-metatholeiites of the Schirmacher region, East Antarctica: constraints from trace elements and Nd-Sr isotopic systematics. Gondwana Res. 3:91-104.
43. Rameshwar Rao, D.; Sharma, R.; and Gururajan, N. S. 1997. Mafic granulites of the Schirmacher region, East Antarctica: fluid inclusion and geothermobarometric studies focusing on the Proterozoic evolution of the crust. Trans. R. Soc. Edinb. Earth Sci. 88:1-17.
44. Ravikant, V. 2002. Structural, metamorphic and geochronological studies of granulites and associated rocks from the Schirmacher Oasis, East Antarctica. PhD thesis, Osmania University, Hyderabad.
45. Ravikant, V. 2005. Metamorphism of ultramafic and mafic enclaves within granulites, Schirmacher Oasis, East Antarctica. J. Geol. Soc. India 65:279-290.
46. Ravikant, V. Forthcoming. Utility of Rb-Sr geochronology in constraining Miocene and Cretaceous events in the eastern Karakoram, Ladakh, India. J. Asian Earth Sci.
47. Ravikant, V.; Bhaskar Rao, Y. J.; and Gopalan, K. 2004. Schirmacher Oasis as an extension of the East African Orogen into Antarctica: new Sm-Nd isochron age constraints. J. Geol. 112:607-616.
48. Ravikant, V., and Kundu, A. 1998. Reaction textures of retrograde pressure-temperature-deformation paths from granulites of Schirmacher Hills, East Antarctica. J. Geol. Soc. India 51:305-314.
49. Rosing, M. T. 1990. The theoretical effect of metasomatism on Sm-Nd isotopic systematics. Geochim. Cosmochim. Acta. 54:1337-1341.
50. Sengupta, S. 1993. Tectonothermal history recorded in mafic dykes and enclaves of gneissic basement in the Schirmacher Hills, East Antarctica. Precambrian Res. 63:273-291.
51. Shiraishi, K.; Ellis, D. J.; Hiroi, Y.; Fanning, C. M.; Motoyoshi, Y.; and Nakai, Y. 1994. Cambrian orogenic belt in East Antarctica and Sri Lanka: implications for Gondwana assembly. J. Geol. 102:47-65.
52. Stern, R. J. 1994. Arc assembly and continental collision in the Neoproterozoic East African Orogen: implications for the consolidation of Gondwanaland. Annu. Rev. Earth Planet. Sci. 22:319-351.
53. Tanaka, T.; Togashi, S.; Kamioka, H.; Amakawa, H.; Kagami, H.; Hamamoto, T.; Yuhara, M.; et al. 2000. JNdi1: a neodymium isotopic reference in consistency with Lajolla neodymium. Chem. Geol. 168:279-281.
54. Tarney, J. 1992. Geochemistry and significance of mafic dyke swarms in the Proterozoic. In Condie, K. C., ed. Proterozoic crustal evolution. Amsterdam, Elsevier, p. 151-179.
55. Thöni, M. 2003. Sm-Nd isotope systematics in garnet from different lithologies (Eastern Alps): age results, and an evaluation of potential problems in garnet Sm-Nd chronometry. Chem. Geol. 194:353-379.
56. Vance, D., and O'Nions, R. K. 1990. Isotopic chronometry of zoned garnets: growth kinetics and metamorphic histories. Earth Planet. Sci. Lett. 97:227-240.
57. Vance, D., and O'Nions, R. K. 1992. Prograde and retrograde thermal histories from the central Swiss Alps. Earth Planet. Sci. Lett. 114:113-129.
58. Weaver, B. L., and Tarney, J. 1981. The Scourie dyke suite: petrogenesis and geochemical nature of the Proterozoic subcontinental mantle. Contrib. Mineral. Petrol. 78:175-178.
59. Wilson, T. J.; Grunow, A. M.; and Hanson, R. E. 1997. Gondwana assembly: the view from Southern Africa and East Gondwana. J. Geodynam. 23:263-286.
60. Zhou, B., and Hensen, B. J. 1995. Inherited Sm/Nd isotope components preserved in monazite inclusions within garnets in leucogneiss from East Antarctica and implications for closure temperature studies. Chem. Geol. 121:317-326.