Characterization and tectonic evolution of a Mesoproterozoic island arc in the southern Grenville Orogen, Llano uplift, central Texas

Tectonophysics

Volumn 265, Issue 1-2 SPEC. ISS., 1996, Pages 29-52

  Roback, Robert C ^a  

^a UNIVERSITY OF TEXAS AT AUSTIN   (United States)

Author keywords

Accretion; Grenville; Mesoproterozoic; Tectonics; U Pb geochronology

Indexed keywords

GRENVILLIAN OROGENY; ISLAND ARC; PROTEROZOIC; TECTONIC EVOLUTION; TERRANE; URANIUM/LEAD DATING;

USA, TEXAS;

EID: 0030428958     PISSN: 00401951     EISSN: None     Source Type: Journal    
DOI: 10.1016/s0040-1951(96)00145-x     Document Type: Article

References (34)

1. Barker, D.S. and Burmester, R.F., 1970. Leaching of quartz from Precambrian hypabyssal rhyolite porphyry, Llano County Texas. Contrib. Mineral. Petrol., 28: 1-8.
2. Barnes, V.E., 1945. Soapstone and serpentine in the central mineral region of Texas. Univ. Tex. Publ., 4301: 55-91.
3. Barnes, V.E., 1978. Geology of the Click quadrangle, Llano and Blanco Counties, Texas, Geologic quadrangle map no. 43. Univ. Tex. Bur. Econ. Geol., scale 1 : 24,000.
4. Barnes, V.E., 1981. Geologic atlas of Texas - Llano sheet. Univ. Tex. Bur. Econ. Geol., scale 1 : 250,000.
5. Bebout, G.E. and Carlson, W.D., 1986. Fluid evolution and transport during metamorphism: Evidence from the Llano uplift. Texas. Contrib. Mineral. Petrol., 92: 518-529.
6. Carter, K.E., 1988. Grenville orogenic affinities in the Red Mountain area. Llano Uplift, Texas. Can. J. Earth Sci., 26: 1124-1135.
7. Corrigan, J.C., Cerveny, P.P., Bergman, S.C. and Donelick, R.A., 1993. Epeirogony and the Llano uplift: How stable has central Texas been? Geol. Soc. Am. Bull., Abstr. Progr., 25(6): A70.
8. Davis, D.W., 1982. Optimum linear regression and error estimation applied to U-Pb data. Can. J. Earth Sci., 23: 2141-2149.
9. Garrison, Jr., J.R., 1981a. Coal Creek Serpentinite, Llano Uplift, Texas: a fragment of an incomplete Precambrian ophiolite. Geology, 9: 225-230.
10. Garrison, Jr., J.R., 1981b. Metabasalts and metagabbros from the Llano Uplift, Texas: Petrologic and geochemical characterization with emphasis on tectonic setting. Contrib. Mineral. Petrol., 78: 459-475.
11. Garrison, Jr., J.R., 1985. Petrology, geochemistry and origin of the Big Branch and Red Mountain gneisses, southeastern Llano Uplift, Texas. Am. Mineral., 70: 1151-1163.
12. Gillis, G.M., 1989. Polyphase deformation and metamorphism of the Middle Proterozoic Coal Creek Serpentinite, Gillespie county, Texas. M.A. thesis. Univ. Texas, Austin, Tex., 103 pp.
13. Hoffman, P.P., 1989. Precambrian geology and tectonic history of North America. In: A.W. Bally and A.R. Palmer (Editors), The Geology of North America, A. The Geology of North America - An Overview. Geological Society of America, Boulder, CO, pp. 447-512.
14. Jaffey, A.H., Flynn, K.F., Glendenin, L.E., Bentley, W.C. and Essling, A.M., 1971. Precision measurements of half-lives and specific activities of 235U and 238U. Phys. Rev. C. Nucl. Phys., 4: 1889-1906.
15. Krogh, T.E., 1982. Improved accuracy of U-Pb zircon ages by the creation of more concordant systems using an air abrasion technique. Geochim. Cosmochim. Acta, 46: 637-649.
16. Letargo, C.M.R., Lamb, W.M. and Jong-Sim Park, 1995. Comparison of calcite and dolomite thermometry and carbonate and silica equilibria: Constraints on the conditions of metamorphism of the Llano uplift, central Texas, U.S.A. Am. Mineral., 80: 131-143.
17. McGehee, R.V., 1979. Precambrian rocks of the southeastern Llano region, Texas. Univ. Tex. Bur. Econ. Geol., Geol. Circ., 793, 36 pp.
18. Mosher, S., 1993. Western extensions of Grenville age rocks: Texas. In: J.C. Reed, Jr., ME. Bickford, R.S. Houston, P.K. Link, D.W. Rankin, P.K. Sims and W.R. Van Schmus (Editors), The Geology of North America, C-2, Precambrian: Conterminous U.S. Geological Society of America, Boulder, CO, pp. 365-378.
19. Moore, J.M., Davidson, A. and Baer, A.J. (Editors), 1986. The Grenville Province. Geol. Assoc. Can., Spec. Pap. 31, 348 pp.
20. Nelis, M.K., Mosher, S. and Carlson, W.D., 1989. Grenville-age orogeny in the Llano Uplift of central Texas: Deformation and metamorphism of the Rough Ridge Formation. Geol. Soc. Am. Bull., 101: 876-883.
21. Parrish, R.R., Roddick, J.C., Loveridge, W.D. and Sullivan, R.W., 1987. Uranium-lead analytical techniques at the geochronology laboratory. Geol. Surv. Can. Pap., 87: 3-7.
22. Patchett, J.P. and Ruiz, J., 1989. Nd isotopes and the origin of Grenville-age rocks in Texas: Implications for Proterozoic evolution of the United States mid-continent region. J. Geol., 97: 685-695.
23. Rankin, D.W., Chiarenzelli, J.R., Drake, Jr., A.A., Goldsmith, R., Hall, L.M., Hinze, W.J., Isachsen, Y.W., Lidiak, E.G., McLelland, J., Mosher, S., Ratliffe, N.M., Secor, Jr., D.T. and Whitney, P.R., 1993. Proterozoic rocks east and southeast of the Grenville front. In: J.C. Reed, Jr., M.E. Bickford, R.S. Houston, P.K. Link, D.W. Rankin, P.K. Sims and W.R. Van Schmus (Editors), The Geology of North America, C-2, Precambrian: Conterminous U.S. Geological Society of America, Boulder, CO, pp. 335-461.
24. Reed, R.M., Roback, R.C. and Helper, M.A., 1995. Nature and age of ductile deformation associated with the 'anorogenic' Town Mountain Granite, Llano uplift, central Texas. Int. Conf. Basement Tectonics, Norman, OK.
25. Reese, J.F., 1995. Structural evolution and geochronology of the southeastern Llano uplift, central Texas. Ph.D. dissertation, Univ. Texas, Austin, Tex., 172 pp.
26. Reese, J.F., Roback, R.C. and Walker, N.W., 1992. Reworked pre-Grenvillian crust and timing of Grenville orogenesis in the southeastern Llano Uplift, Texas: Results from U-Pb geochronometry. Geol. Soc. Am., Abstr. Programs, 24(7): A92.
27. Rivers, T.J., Martignole, C.F., Gower, C.F. and Davidson, A., 1989. New tectonic subdivision of the Grenville province, southeast Canadian shield. Tectonics, 8: 63-84.
28. Roback, R.C., 1996. Mesoproterozoic polymetamorphism and magmatism in the Llano uplift, central Texas. Geol. Soc. Am., Abstr. Programs, 28(7), in press.
29. Roback, R.C., James, E.W., Whitefield, C. and Connelly, J., 1995. Tectonic assembly of 'Grenville' terranes in the Llano uplift, central Texas: Evidence from Pb and Sm-Nd isotopes. Geol. Soc. Am., Abstr. Programs, 27(6): A398.
30. Silver, L.T., 1963. U-Pb isotopic ages from zircons from some igneous rocks from the Llano uplift, central Texas. Geol. Soc. Am., Spec. Pap., 73: 243-244.
31. Stacey, J.S. and Kramers, J.D., 1975. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth Planet. Sci. Lett., 26: 207-221.
32. Swarze, E.T., 1990. Polymetamorphism in the Llano uplift; Evidence from geothermobarometry and compositional zoning in garnet. M.A. thesis. Univ. Texas, Austin, TX, 276 pp.
33. Tilton, G.R., Davis, G.L., Wetherill, G.W. and Aldrich; L.T., 1957. Isotopic ages from granites and pegmatites. EOS Trans. Am. Geophys. Union, 38: 360-371.
34. Walker, N., 1992. Middle Proterozoic geologic evolution of Llano uplift, Texas: Evidence from U-Pb zircon geochronometry. Geol. Soc. Am. Bull., 104: 494-504.