How does the continental crust thin in a hyperextended rifted margin? Insights from the iberia margin

Geology

Volumn 40, Issue 2, 2012, Pages 139-142

  Sutra, Emilie ^a   Manatschal, Gianreto ^a  

^a UNIVERSITÉ DE STRASBOURG   (France)

Author keywords

[No Author keywords available]

Indexed keywords

CONTINENTAL CRUSTS; COUPLED DEFORMATION; COUPLED ZONE; CRUSTAL THINNING; DEEPWATER; DRILL HOLE; LITHOSPHERIC; LITHOSPHERIC MANTLE; MANTLE LEVEL; REFRACTION SEISMICS;

DEFORMATION;

GEOCHRONOLOGY;

CONTINENTAL CRUST; CRUSTAL THINNING; DEFORMATION; EXHUMATION; LITHOSPHERIC STRUCTURE; MANTLE STRUCTURE; RIFT ZONE; SEISMIC REFLECTION; SUBSIDENCE;

ATLANTIC OCEAN; IBERIAN MARGIN;

EID: 84858133351     PISSN: 00917613     EISSN: 19432682     Source Type: Journal    
DOI: 10.1130/G32786.1     Document Type: Article

References (25)

1. Alves, T.M., Moita, C., Sandnes, F., Cunha, T., Monteiro, J.H., and Pinheiro, L.M., 2006, Mesozoic- Cenozoic evolution of North Atlantic continental-slope basins: The Peniche basin, western Iberian margin: American Association of Petroleum Geologists Bulletin, v. 90, p. 31-60.
2. Beslier, M.O., 1996, Data report: Seismic line LG12 in the Iberia Abyssal Plain, in Whitmarsh, R.B., et al., eds., Proceedings of the Ocean Drilling Program, Scientific results, Volume 149: College Station, Texas, Ocean Drilling Program, p. 737- 739, doi:10.2973/odp.proc.sr.149.257.1996.
3. Boillot, G., and 22 others, 1987, Proceedings of the Ocean Drilling Program, Initial reports, Volume 103: College Station, Texas, Ocean Drilling Program, doi:10.2973/odp.proc.ir.103.1987.
4. Brun, J.P., and Beslier, M.-O., 1996, Mantle exhumation at passive margins: Earth and Planetary Science Letters, v. 142, p. 161-173, doi:10.1016/0012-821X(96)00080-5.
5. Cannat, M., Manatschal, G., Sauter, D., and Péron-Pinvidic, G., 2009, Assessing the conditions of continental breakup at magma-poor rifted margins: What can we learn from slow spreading mid-ocean ridges?: Comptes Rendus Geoscience, v. 341, p. 406-427, doi:10.1016/j.crte .2009.01.005.
6. Crosby, A., White, N., Edwards, G., and Shillington, D.J., 2008, Depth, age and dynamic topography of oceanic lithosphere beneath heavily sedimented Atlantic margins: Earth and Planetary Science Letters, v. 273, p. 214-226, doi:10.1016/j .epsl.2008.06.039.
7. Cunha, T., 2008, Gravity anomalies, flexure, and the thermal and mechanical evolution of the West Iberia Margin and its conjugate of Newfoundland [Ph.D. thesis]: Oxford, UK, Oxford University, 44 p.
8. Dean, S.M., Minshull, T.A., Whitmarsh, R.B., and Louden, K.E., 2000, Deep structure of the ocean-continent transition in the Southern Iberia Abyssal Plain from seismic refraction profiles: The IAM-9 transect at 40°20' N: Journal of Geophysical Research, v. 105, p. 5859-5885, doi:10.1029/1999JB900301.
9. Díaz, J., and Gallart, J., 2009, Crustal structure beneath the Iberian Peninsula and surrounding waters: A new compilation of deep seismic sounding results: Physics of the Earth and Planetary Interiors, v. 173, p. 181-190, doi:10.1016/j.pepi .2008.11.008.
10. Discovery 215 Working Group, 1998, Deep structure in the vicinity of the ocean-continent transition zone under the southern Iberia Abyssal Plain: Geology, v. 26, p. 743-746, doi:10.1130/0091 -7613(1998)026<0743:DSITVO>2.3.CO;2.
11. Egan, S.S., and Meredith, D.J., 2007, A kinematic modeling approach to lithosphere deformation and basin formation: Application to the Black Sea, in Karner, G.D., et al., eds., Imaging, mapping and modelling continental lithosphere extension and breakup: Geological Society of London Special Publication 282, p. 173-198, doi:10.1144/ SP282.9.
12. Henning, A.T., Sawyer, D.S., and Templeton, D.S., 2004, Exhumed upper mantle within the ocean-continent transition of the northern West Iberia margin: Evidence from prestack depth migration and total tectonic subsidence analyses: Journal of Geophysical Research, v. 109, B05103, doi:10.1029/2003JB002526.
13. Huismans, R.S., and Beaumont, C., 2008, Complex rifted continental margins explained by dynamical models of depth-dependent lithospheric extension: Geology, v. 36, p. 163-166; doi:10.1130/G24231A.1.
14. Huismans, R.S., and Beaumont, C., 2011, Depthdependent extension, two-stage breakup and cratonic underplating at rifted margins: Nature, v. 473, p. 74-78, doi:10.1038/nature09988.
15. Kusznir, N.J., and Karner, G.D., 2007, Continental lithospheric thinning and breakup in response to upwelling divergent mantle flow: Application to the Woodlark, Newfoundland, and Iberia margins, in Karner, G.D., et al., eds., Imaging, mapping, and modelling continental lithosphere extension and breakup: Geological Society of London Special Publication 282, p. 389-419, doi:10.1144/ SP282.16.
16. Lundin, E.R., and Doré, A.G., 2011, Hyperextension, serpentinization, and weakening: A new paradigm for rifted margin compressional deformation: Geology, v. 39, p. 347-350, doi:10.1130/ G31499.1.
17. Péron-Pinvidic, G., and Manatschal, G., 2009, From micro continents to extensional allochthons: Witnesses of how continents rift and break apart?: Petroleum Geoscience, v. 16, p. 189-197, doi:10.1144/1354-079309-903.
18. Péron-Pinvidic, G., Manatschal, G., Minshull, T.A., and Dean, S., 2007, Tectonosedimentary evolution of the deep Iberia-Newfoundland margins: Evidence for a complex breakup history: Tectonics, v. 26, TC2011, doi:10.1029/2006TC001970.
19. Ranero, C.R., and Pérez-Gussinyé, M., 2010, Sequential faulting explains the asymmetry and extension discrepancy of conjugate margins: Nature, v. 468, p. 294-299, doi:10.1038/nature09520.
20. Reston, T.J., 2007, Extension discrepancy at North Atlantic nonvolcanic rifted margins: Depthdependent stretching or unrecognized faulting?: Geology, v. 35, p. 367-370, doi:10.1130/ G23213A.1.
21. Reston, T.J., Krawczyk, C.M., and Klaeschen, D., 1996, The S reflector west of Galicia (Spain): Evidence from prestack depth migration for detachment faulting during continental breakup: Journal of Geophysical Research, v. 101, p. 8075-8091, doi:10.1029/95JB03466.
22. Sawyer, D.S., and 27 others, 1994, Proceedings of the Ocean Drilling Program, Initial reports, Volume 149: College Station, Texas, Ocean Drilling Program, doi:10.2973/odp.proc.ir.149.1994.
23. Whitmarsh, R.B., Miles, P.R., and Mauffret, A., 1990, The ocean-continent boundary off the western continental margin of Iberia, I. Crustal structure at40°30'N: Geophysical Journal International, v. 103, p. 509-531, doi:10.1111/j.1365 -246X.1990.tb01788.x.
24. Whitmarsh, R.B., and 25 others, 1998, Proceedings of the Ocean Drilling Program, Initial reports, Volume 173: College Station, Texas, Ocean Drilling Program, doi:10.2973/odp.proc.ir.173.1998.
25. Zelt, C.A., Sain, K., Naumenko, J.V., and Sawyer, D.S., 2003, Assessment of crustal velocity models using seismic refraction and reflection tomography: Geophysical Journal International, v. 153, p. 609-626, doi:10.1046/j.1365-246X .2003.01919.x.