Shrimp u/pb zircon geochronology of neoproterozoic juvenile and crustal-reworked terranes in southernmost brazil

International Geology Review

Volumn 40, Issue 8, 1998, Pages 688-705

  Leite, Jayme A D ^a   Hartman, L O A ^b   McNaughton, Neal J ^c   Chemale, Farid ^b  

^a FEDERAL UNIVERSITY OF MATO GROSSO   (Brazil)

^b FEDERAL UNIVERSITY OF RIO GRANDE DO SUL   (Brazil)

^c UNIVERSITY OF WESTERN AUSTRALIA   (Australia)

Author keywords

[No Author keywords available]

Indexed keywords

GEOCHRONOLOGY; PROTEROZOIC;

BRAZIL;

EID: 0032465348     PISSN: 00206814     EISSN: 19382839     Source Type: Journal    
DOI: 10.1080/00206819809465232     Document Type: Article

References (22)

1. Babinski, M., Chemale, F., Jr., Hartmann, L. A., Van Schmus, W. R., and Silva, L. C., 1995. “ Acresção juvenil no Bloco São Gabriel e retrabalhamento crustal no Cinturão Dom Feliciano durante o Ciclo Brasiliano:Evidências Isotópicas ”. In VI Simpósio Sul-Brasileiro de Geologia. Porto Alegre, Soc. Bras. Geol., Edited by:Silva, L. C., Caldasso, S. L. A., and Kirchner, C. A., 105–107. Núcleo Rio Grande do Sul.
2. Babinski, M., Chemale, F., Jr., Hartmann, L. A., Van Schmus, W. R., and Silva, L. C., 1996. Juvenile accretion in Southernmost Brazil. Geology, 24:439–442.
3. Berhe, S. M., 1990. Ophiolites in Northeast and East Africa:Implications for Proterozoic crustal growth. Jour. Geol. Soc. Lond., 147:41–57.
4. Black, B., and Liegeois, J.-P., 1993. Cratons, mobile belts, alkaline rocks, and continental lithospheric mantle:The Pan-African testimony. Jour. Geol. Soc. Lond., 150:89–98.
5. Brito Neves, B. B., and Cordani, U. G., 1991. Tectonic evolution of South America during Late Proterozoic. Precamb. Res., 53:23–40.
6. Chemale, F., Jr., Hartmann, L. A., Babinski, M., Wildner, W., and Van Schmus, W. R., 1994. “ Evolução tectonica do Bloco São Gabriel, RS ”. In XXXIV Congr. Bras. Geol., v. 1, 232–233. Camboriú:Soc. Bras. Geol.
7. Chemale, F., Jr., Hartmann, L. A., and Silva, L. C., 1995. Stratigraphy and tectonism of Brasiliano Cycle in Southern Brazil and Uruguay—excursion guidebook. Acta Geol. Leopoldensia, 42:4–115.
8. Compston, W., and Kröner, A., 1988. Multiple zircon growth within early Archean tonalitic gneisses from the Ancient Gneiss Complex, Swaziland. Earth Planet. Sci. Lett, 87:13–28.
9. Ellam, R. M., Hawkesworth, C. J., and McDermott, F., 1990. Pb-isotope data from Late Proterozoic subduction-related rocks:Implications for crust-mantle evolution. Chem. Geology, 83:165–181.
10. 2 fluid-induced granulite-facies metamorphism, Kabbaldurga, Karnataka, South India. Contrib. Mineral. Petrol., 111:299–310.
11. Leite, J. A. D., 1997. A origem dos harzburgitos da Sequência Cerro Mantiqueiras e implicações tectônica para o desenvolvimento do Neoproterozóico no sul do Brasil:Unpubl. Ph.D. thesis, 243Porto Alegre:Univ. Federal do Rio Grande do Sul.
12. Machado, N., Koppe, J. C., and Hartmann, L. A., 1987. A Late Proterozoic U-Pb age for the Bossoroca Belt, Rio Grande do Sul, Brazil. Jour. South Amer. Earth Sci., 3 (2-3):87–90.
13. Nutmann, A. P., Kinny, P. D., Compston, W., and Williams, I. S., 1991. SHRIMP U-Pb zircon geochronology of the Narryer Gneiss Complex, Western Australia. Precamb. Res., 52:275–300.
14. Pimentel, M. M., and Fuck, R. A., 1992. Neoproterozoic crustal accretion in central Brazil. Geology, 20:375–379.
15. Soliani, E., Jr. 1988. Os dados geocronolólogicos do Escudo Sul-Riograndense e suas implicações de ordem geotectonica:Unpubl. Ph.D. thesis, 425Sao Paulo:Univ. de São Paulo. Unpubl. Ph.D. thesis
16. Smith, J. B., Barley, M. E., Groves, D. I., Krapez, B., Mc-Naughton, N. J., Bickle, M. J., and Chapman, H. J., 1998. The Scholl shear zone, West Pilbara:Evidence for a terrane boundary structure from integrated tectonic analyses, SHRIMP U/Pb dating and isotopic and geochemical data of granitoids. Precamb. Res., 88:143–171.
17. Stern, R. J., 1994. Arc assembly and continental collision in the Neoproterozoic East African Orogen:Implications for the consolidation of Gondwanaland. Ann. Rev. Earth Planet. Sci., 22:319–351.
18. Wetherill, G. W., 1956. Discordant uranium-lead ages. Trans. Amer. Geophys. Union,:37
19. Wiedenbeck, M., 1995. An example of reverse discordance during ion microprobe zircon dating:An artifact of enhanced ion yields from a radiogenic labile Pb. Chem. Geol., 125:197–218.
20. Williams, I. S., Compston, W., Black, L. P., Ireland, T. R., and Foster, J. J., 1984. Unsupported radiogenic Pb in zircon:A cause of anomalously high Pb-Pb, U-Pb, and Th-Pb ages. Contrib. Mineral. Petrol, 88:322–327.
21. Williams, I. S., 1992. Some observations on the use of zircon U-Pb geochronology in the study of granitic rocks. Trans. Roy. Soc. Edinburgh, 83:447–458.
22. Williams, I. S., and Claesson, S., 1987. Isotopic evidence for the Precambrian provenance and Caledonian meta-morphism of high-grade paragneiss from Seve Nappes, Scandinavian Caledonides. Part II. Ion microprobe zircon U-Th-Pb. Contrib. Mineral. Petrol., 97:205–217.