Arc-like mid-ocean ridge basalt formed seaward of a trench-forearc system just prior to ridge subduction: An example from subaccreted ophiolites in southern Alaska

Journal of Geophysical Research: Solid Earth

Volumn 102, Issue B5, 1997, Pages 10225-10243

  Lytwyn, Jennifer ^a   Casey, John ^a   Gilbert, Susan ^a   Kusky, Timothy ^b  

^a UNIVERSITY OF HOUSTON   (United States)

^b BOSTON UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BASALT; MORB; OPHIOLITE; RIDGE SUBDUCTION; TECTONIC SETTING;

USA, ALASKA;

EID: 0031452482     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: None     Document Type: Article

References (17)

1. Anders, E., and N. Grevesse, Abundances of the elements: Meteoritic and solar, Geochim. Cosmochim. Acta, 53, 197-214, 1989.
2. Atwater, T., Plate tectonic history of the northeast Pacific and western North America, in The Geology of North America, vol. N, The Eastern Pacific Ocean and Hawaii, edited by E.L. Winterer, D.M. Hussong and R.W. Decker, pp. 21-72, Geol. Soc. of Am., Boulder, Colo., 1989.
3. Barker, F., G.L. Farmer, R.A. Ayuso, G. Plafker, and J.S. Lull, The 50 Ma granodiorite of the eastern Gulf of Alaska: Melting in an accretionary prism in the forearc, J. Geophys. Res., 97, 6757-6778, 1992.
4. Baxter, A.N., B.G.J. Upton, and W.M. White, Petrology and geochemistry of Rodrigues Island, Indian Ocean, Contrib. Mineral. Petrol, 89, 90-101, 1985.
5. Bol, A.J., R.S. Cole, C.S. Gromme, and J.W. Hillhouse, Paleomagnetism of the Resurrection Peninsula, Alaska: Implications for the tectonics of southern Alaska and the Kula-Farallon ridge, J. Geophys. Res., 97, 17,213-17,232, 1992.
6. Bradley, D.C., and T.M. Kusky, Deformation history of the McHugh complex, Seldovia Quadrangle, south-central Alaska, in Geologic Studies in Alaska by the U.S. Geological Survey, 1990, edited by D.C. Bradley and A.B. Ford, U.S. Geol. Surv. Bull. 1999,17-32, 1992.
7. Bradley, D.C., P.J. Haeussler, and T.M. Kusky, Timing of early Tertiary ridge subduction in southern Alaska, inGeologic Studies in Alaska by the U.S. Geological Survey, 1992, U.S. Geol. Surv. Bull., 2068, 163-178, 1993.
8. Byrne, T., Late Paleocene demise of the Kula-Pacific spreading center, Geology. 10, 191-196, 1979.
9. Byrne, T., and D. Fisher, Episodic growth of the Kodiak convergent margin, Nature, 32, 338-341, 1987.
10. Casey, J.F., and J.F. Dewey, Initiation of subduction zones along transform and accreting plate boundaries, triple-junction evolution and forearc spreading centers: Implications for ophiolite geology and obduction, in Ophiolites and Oceanic Lithosphere, edited by I.G. Gass, S.J. Lippard and A.W. Shelton, Geol. Soc. Spec. Publ., 13, 269-290, 1984.
11. Connelly, W., Uyak Complex, Kodiak Islands, Alaska: A Cretaceous subduction complex, Geol. Soc. Am. Bull., 89, 755-769, 1978.
12. Cox, K.G., J.D. Bell, and R.J. Pankhurst, The Interpretation of Igneous Rocks, 450 pp., Allen and Unwin, Winchester, Mass., 1979.
13. Crawford, A.J., T.J. Falloon, and D.H. Green, Classification, petrogenesis and tectonic setting of boninites, in Boninites, edited by A.J. Crawford, pp. 1-48, Unwin Hyman, Boston, Mass., 1989.
14. Crowe, D.E., S.W. Nelson, P.E. Brown, W.C. Shanks III, and J.W. Valley, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks. Prince William Sound, south-central Alaska, Econ. Geol., 87, 1722-1746, 1992.
15. Decker, J.E., Geology of a Cretaceous subduction complex, western Chichagof Island, southeastern Alaska, 135 pp., Ph.D. thesis, Stanford Univ., Stanford, Calif., 1980.
16. De Long, S.E., and P.J. Fox, Geological consequences of ridge subduction, in Island Arcs, Deep Sea Trenches, and Back-Arc Basins, vol. 1, edited by M. Taiwani and W.C. Pitman III, Maurice Ewing Ser., vol. 1, pp. 221-228, AGU, Washington, D.C., 1977.
17. Zielinski, R.A., Trace element evaluation of a suite of rocks from Reunion Island, Indian Ocean, Geochim. Cosmochim. Acta, 39, 713-734, 1975.