@inbook{04e93da280254fedaba1f5e26f9c123c,
title = "Structure of the Flemish Cap margin, Newfoundland: insights into mantle and crustal processes during continental breakup",
abstract = "Seismic reflection and refraction data from the Flemish Cap margin off Newfoundland reveal the large-scale structure of a magma-starved rifted margin. There is little evidence for significant extensional deformation of the Flemish Cap, consistent with the hypothesis that it behaved as a microplate throughout the Mesozoic. The seismic data highlight important asymmetries at a variety of scales that developed during the final stages of continental breakup and the onset of oceanic sea-floor spreading. In strong contrast to the conjugate Galicia Bank margin, Flemish Cap shows: (1) an abrupt necking profile in cointinental crust, thinning from 30 km thick to 3 km thick over a distance of 80 km, and a narrow, less than 20 km-wide, zone of extremely thin continental crust; (2) no clear evidence for horizontal detachment structures beneath continental crust similar to the 'S' reflection; and (3) evidence for at least a 60 km-wide zone of anomalously thin oceanic crust that began accreting to the margin shortly after continental crustal separation. The oceanic crust averages only 3-4 km thick and in places is as thin as 1.3 km thick, although seismic layer 3 is missing where this occurs. The data suggest that there are large spatial and temporal variations in the available melt supply following continental breakup as oceanic sea-floor spreading becomes established. In addition, wide-angle data show that anomalously slow mande P-wave velocities appew approximately where continental crust has thinned to 6-8 km thick, indicating that low-degree serpentinization begins where the entire crust has become embrittled.",
author = "J.R. Hopper and T. Funck and B.E. Tucholke",
year = "2007",
doi = "10.1144/SP282.3",
language = "English",
isbn = "978-1-86239-228-1",
series = "Geological Society Special Publications",
publisher = "Geological Society of London",
pages = "47--61",
editor = "G.D. Karner and G. Manatschal and L.M. Pinheiro",
booktitle = "Imaging, mapping and modelling continental lithosphere extension and breakup",
address = "United Kingdom",
}