Thermal and petrophysical characterization of the lithospheric mantle along the northeastern Iberia geo-transect

Crust and mantle lithospheric structure of the Iberian Peninsula deduced from potential field modeling and thermal analysis

“…Carballo et al (2015) found that along the Pyrenees and Ebro Basin the LAB depth oscillates between 130 and 90 km. In the west, underneath the Cantabrian Mountains the lithosphere is thicker with values varying from 125 to 145 km, although locally -under its crustal root-it may reach depths as much as 170 km (Pedreira et al, 2015).…”

“…Unlike the base of the crust, the base of the lithosphere for the whole Iberian Peninsula is poorly known. The main information comes from 2D lithospheric modelling along three profiles crossing the entire peninsula from N to S (Carballo et al, this issue); and its NE (Carballo et al, 2015) and SW regions (Fernàndez et al, 2004;Palomeras et al, 2011). Additional information comes from 3D modelling of its southern regions (Fullea et al, 2010 andTorne et al, 2000) and from tomography studies (e.g., Bezada, et al, 2014;Bonnin et al, 2014;Chevrot et al, 2014;.…”

From the North-Iberian Margin to the Alboran Basin: A lithosphere geo-transect across the Iberian Plate

“…However, as demonstrated by Carballo et al (2015) and Pedreira et al (2015), using compositions Tc_1 or Pr_6 give almost undistinguishable results. Carballo et al (2015) also tested the four different compositions proposed for 'tecton' lithospheres (formed or modified at b1 Ga) from global studies (Griffin et al, 2009). These authors concluded that both, Tc_1 and Tc_2, could be compatible with the geophysical observables with small changes in the structure of the lithospheric mantle.…”

“…The dominant composition corresponds to the Average Tecton garnet sub-continental lithospheric mantle (Tc_1) (Griffin et al, 2009), which has also been proposed by Pedreira et al (2015) and Fullea et al (2010) along the northern and southern segments of the transect, respectively. Carballo et al (2015) used a slightly different composition for the lithospheric mantle beneath the Pyrenees and NE-Iberia, based on the average composition of the lherzolites from the Pyrenean massif of Lherz (Pr6, Griffin et al, 2009). However, as demonstrated by Carballo et al (2015) and Pedreira et al (2015), using compositions Tc_1 or Pr_6 give almost undistinguishable results.…”

“…Carballo et al (2015) used a slightly different composition for the lithospheric mantle beneath the Pyrenees and NE-Iberia, based on the average composition of the lherzolites from the Pyrenean massif of Lherz (Pr6, Griffin et al, 2009). However, as demonstrated by Carballo et al (2015) and Pedreira et al (2015), using compositions Tc_1 or Pr_6 give almost undistinguishable results. Carballo et al (2015) also tested the four different compositions proposed for 'tecton' lithospheres (formed or modified at b1 Ga) from global studies (Griffin et al, 2009).…”