Rift relocation - A geochemical and geochronological investigation of a palaeo-rift in northwest Iceland

Earth and Planetary Science Letters

Volumn 153, Issue 3-4, 1997, Pages 181-196

  Hardarson, B S ^a,b   Fitton, J G ^a   Ellam, R M ^b   Pringle, M S ^b  

^a UNIVERSITY OF EDINBURGH   (United Kingdom)

^b SCOTTISH UNIVERSITIES ENVIRONMENTAL RESEARCH CENTRE   (United Kingdom)

Author keywords

Basalts; Iceland; Mantle plumes; Mid ocean ridge basalts; Mid ocean ridges; Rift zones

Indexed keywords

MANTLE PLUME; MID-OCEAN RIDGE; MORB; RIFTING;

ICELAND;

EID: 0031425822     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/s0012-821x(97)00145-3     Document Type: Article

References (44)

1. S.P. Jakobsson, Petrology of recent basalts of the Eastern volcanic zone, Iceland, Acta Nat. Isl. 26 (1979) 103.
2. H. Johannesson, Evolution of rift zones in western Iceland (in Icelandic with an English summary), Natturufraedingurinn 50 (1980) 13-31.
3. K. Tryggvason, E.S. Huseby, R. Stefansson, Seismic image of the hypothesized Icelandic hot spot, Tectonophysics 100 (1983) 97-118.
4. N. Oskarsson, S. Steinthorsson, G.E. Sigvaldason, Iceland geochemical anomaly: origin, volcanotectonics, chemical fractionation and isotope evolution of the crust. J. Geophys. Res. 90 (1985) 10011-10025.
5. K. Saemundsson, Outline of the geology of Iceland, Jökull 29 (1980) 7-28.
6. G.E. Vink, A hotspot model for the Iceland and Vøring plateau, J. Geophys. Res. 89 (1984) 9949-9959.
7. G. Pálmason, Crustal rifting and related thermo-mechanical processes in the lithosphere beneath Iceland, Geol. Rundsch. 70 (1981) 244-260.
8. G. Pálmason, Model of crustal formation in Iceland and application to submarine mid-ocean ridges, in: M. Talwani, C.G. Harrison, D.E. Hayes (Eds.), Deep Drilling Results in the Atlantic Ocean: Ocean Crust, Maurice Ewing Series 2, American Geophysical Union, 1986, pp. 43-65.
9. P.R. Vogt, The Iceland mantle plume: status of the hypothesis after a decade of new work, in: M.H.P. Bott, S. Saxov, M. Talwani, J. Thiede (Eids.), Structure and Development of the Greenland-Scotland Ridge. New Methods and Concepts, Plenum, New York, 1983, pp. 191-213.
10. P. Einarsson, Earthquakes and present-day tectonics in Iceland, Tectonophysics 189 (1991) 261-279.
11. P.R. Vogt, Asthenosphere motion recorded by the ocean floor south of Iceland, Earth Planet. Sci. Lett. 13 (1971) 153-160.
12. J.-G. Schilling, P.S. Meyer, R.H. Kingsley, Evolution of the Iceland hotspot, Nature 296 (1982) 313-320.
13. J.G. Fitton, A.D. Saunders, L.M. Larsen, B.S. Hardarson, M.J. Norry, Volcanic rocks from the southeast Greenland margin at 63°N: composition, petrogenesis and mantle sources, Proc. ODP Sci. Results 152 (in press).
14. L. Barbero, C. Villaseca, G. Rogers, P.E. Brown, Geochemical and isotopic disequilibrium in crustal melting: an insight from the anatectic granitoids from Toledo, Spain, J. Geophys. Res. 100 (1995) 15745-15765.
15. 39Ar incremental heating analyses of lavas, Earth Planet. Sci. Lett. 139 (1996) 47-61.
16. M.S. Pringle, Age progressive volcanism in the Musicians seamounts: a test of the hot spot hypothesis for the late Cretaceous Pacific, in: M.S. Pringle, W.W. Sager, W.V. Sliter. S. Stein (Eds.), The Mesozoic Pacific Geology, Tectonics and Volcanism, Am. Geophys. Union Geophys. Monogr. 77 (1993) 187-215.
17. L. Kristjansson, A. Gudmundsson, H. Haraldsson, Stratigraphy and paleomagnetism of a 3-km thick Miocene lava pile in the Mjoifjordur area, eastern Iceland, Geol. Rundsch. 84 (1995) 813-830.
18. S.C. Cande, D.V. Kent, Revised calibration of the geomagnetic polarity timescale for the Late Creataceous and Cenozoic, J. Geophys. Res. 100 (1995) 6093-6095.
19. I. McDougall, L. Kristjansson, K. Saemundsson, Magnetostratigraphy and geochronology of northwest Iceland, J. Geophys. Res. 89 (1984) 7029-7060.
20. B.S. Hardarson, J.G. Fitton, Mechanisms of crustal accretion in Iceland, Geology (in press).
21. C. Hémond, N. Arndt, U. Lichtenstein, A.W. Hofmann, N. Oskarsson, S. Steinthorsson, The heterogeneous Iceland plume: Nd-Sr-O isotopes and trace element constraints, J. Geophys. Res. 98 (1993) 15833-15850.
22. H. Nicholson, The magmatic evolution of Krafla, NE Iceland, Ph.D. Thesis, Univ. Edinburgh, 1990.
23. T. Furman, F.A. Frey, K.-H. Park. Chemical constraints on the petrogenesis of mildly alkaline lavas from Vestmannaeyjar, Iceland: the Eldfell (1973) and Surtsey (1963-1967) eruptions, Contrib. Mineral. Petrol. 109 (1991) 19-37.
24. T.R. Elliott, C.J. Hawkesworth, K. Grönvold, Dynamic melting of the Iceland plume, Nature 351 (1991) 201-206.
25. B.S. Hardarson, Alkalic rocks in Iceland with special reference to the Snaefellsjökull volcanic system, Ph.D. Thesis, Univ. Edinburgh, 1993.
26. A. Zindler, S.R. Hart, F.A. Frey, S.P. Jakobsson, Nd and Sr isotope ratios and rare element abundances in Reykjanes peninsula basalts: evidence for mantle heterogeneity beneath Iceland, Earth Planet. Sci. Lett. 45 (1979) 249-262.
27. S.-S. Sun, M. Tatsumoto, J.-G. Schilling, Mantle plume mixing along the Reykjanes ridge axis: Lead isotope evidence. Science 190 (1975) 143-147.
28. S.-S. Sun, B. Jahn, Lead and strontium isotopes in post-glacial basalts from Iceland, Nature 255 (1975) 527-530.
29. K.-H. Park, Sr, Nd and Pb isotope studies of ocean island basalts, Constraints on their origin and evolution, Ph.D. Thesis, Columbia Univ., 1990.
30. R.S. Cohen, N.M. Evensen, P.J. Hamilton, R.K. O'Nions, U-Pb, Sm-Nd and Rb-Sr systematics of mid-ocean ridge basalt glasses, Nature 283 (1980) 149-153.
31. B. Dupré, C.J. Allègre, Pb-Sr-Nd isotopic correlation and the chemistry of the North Atlantic mantle, Nature 286 (1980) 17-22.
32. S.-S. Sun, Lead isotope study of young volcanic rocks from mid-ocean ridges, ocean islands and island-arcs, Philos. Trans. R. Soc. London A297 (1980) 409-445.
33. E. Ito, W.M. White, C. Gopel, The O, Sr, Nd and Pb isotope geology of MORB, Chem. Geol. 62 (1987) 157-176.
34. J.-G. Schilling, Iceland mantle plume: Geochemical study of the Reykjanes Ridge, Nature 242 (1973) 565-571.
35. R.N. Taylor, B.J. Murton, M.F. Thirlwall, Petrographic and geochemical variation along the Reykjanes Ridge, 57°N-59°N, J. Geol. Soc. London 152 (1995) 1031-1037.
36. M.F. Thirlwall, Generation of the Pb isotopic characteristics of the Iceland plume, J. Geol. Soc. London 152 (1995) 992-996.
37. A.C. Kerr, A.D. Saunders, J. Tarney, N.H. Berry, V.L. Hards, Depleted mantle-plume geochemical signatures: No paradox for plume theories, Geology 23 (1995) 843-846.
38. D.F. Mertz, K.M. Haase, The radiogenic isotope composition of the high-latitude North Atlantic mantle, Geology 25 (1997) 411-414.
39. J.G. Fitton, A.D. Saunders, M.J. Norry, B.S. Hardarson, R.N. Taylor, Thermal and chemical structure of the Iceland plume, Earth Planet. Sci. Lett. 153 (1997), this issue.
40. W.F. McDonough, S.-S. Sun, The composition of the Earth, Chem. Geol. 120 (1995) 223-253.
41. S. Moorbath, H. Sigurdsson, R. Goodwin, K-Ar ages of the oldest exposed rocks in Iceland, Earth Planet. Sci. Lett. 4 (1968) 197-205.
42. L. Kristjansson, G. Jonsson, Aeromagnetic results and the presence of an extinct rift zone in western Iceland, J. Geodyn. (in press).
43. L. McDougall, K. Saemundsson, H. Johannesson, N.D. Watkins, L. Kristjansson, Extension of the geomagnetic polarity time scale to 6.5. m.y. K-Ar dating, geological and paleomagnetic study of a 3500 m lava succession in western Iceland, Geol. Soc. Am. Bull. 88 (1977) 1-15.
44. R.S. White, J.W. Brown, J.R. Smallwood. The temperature of the Iceland plume and origin of outward-propagating V-shaped ridges, J. Geol. Soc. London 152 (1995) 1039-1045.