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Conclusions a few fundamental relationships are common to these margins:

  • Rifting activity continues for a considerable time frame before breakup and seafloor spreading that is subsequent. For the Nova Scotian margin this era had been since great as 40-50 Ma, when it comes to Newfoundland margin 30-40 Ma as well as Labrador 40-65 Ma. Pulses of volcanic task during rifting may take place, perhaps causing platform uplift because of localized underplating and/or thinning associated with the lithosphere, however these pulses appear to be localized instead of local in degree. Therefore the margins are predominantly non-volcanic.
  • The spatial level of main rift task ultimately ultimately causing breakup in the margin that is southern laterally into the adjacent margin to your north. Hence the Triassic that is late to Jurassic rifting from the Scotian margin additionally impacted the Grand Banks therefore the belated Jurassic to Early Cretaceous rifting regarding the Grand Banks additionally impacted the Labrador margin.
  • A area of transitional cellar

150 km wide exists seaward regarding the extended continental crust and landward associated with the very very first oceanic crust that is normal. This area is related to characteristic alterations in cellar morphology and level over the change area, using the deepest, flat-lying cellar regarding the landward part and elevated cellar highs from the seaward side. One possibility is the fact that this area is made up mainly of serpentinized mantle with only minor levels of crustal melt (Louden and Chian, 1999). The presence of this change area is most probably due to extremely rates that are slow numerous durations of expansion.

  • Extra crustal refraction pages recently undertaken from the Newfoundland and Scotian margins will assist you to show whether or not the crustal variants previously observed down Labrador are normal to those other margins. Connection of the profiles with comparable pages across their margin conjugates may help show perhaps the degree that is high of asymmetry observed when it comes to Labrador-Greenland transect is a very common function of this other margin sections. Continue reading
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