Magmatism Associated with Orogenic Collapse of the Betic-Alboran Domain, SE Spain

A paleointensity study on middle Miocene to Pliocene volcanic rocks from south-eastern Spain

“…(Torres-Roldán et al, 1986) and 30.2±0.9 m.y. (Turner et al, 1999) in the internal Betic zone north of Málaga.…”

Tertiary-Quaternary subduction processes and related magmatism in the Alpine-Mediterranean region

“…Following subduction of oceanic lithosphere, continent-continent collision occurs resulting in thickening of the continental crust and lithosphere. Detachment of the dense oceanic slab (Davies & von Blanckenburg 1995), delamination of the thick lithospheric mantle (Bird 1979), sometimes with the dense mafic lower crust or convective removal of the lower lithosphere (Housman et al 1981;Platt & Vissers 1989;Turner et al 1999) could be responsible for post-collisional extension and related magmatism. The geochemistry of the magmas is dependant on the rheology of the continental plates involved in the collision, the extent of collision and the velocity of plate convergence (Wang et al 2004).…”

Geochronology and geochemistry of the late Paleoproterozoic aluminous A-type granite in the Xiaoqinling area along the southern margin of the North China Craton: Petrogenesis and tectonic implications

“…It is well known that post-collisional extension can be triggered by (1) lithospheric delamination (e.g., Kay and Kay, 1993), (2) gravitational or orogenic collapse (e.g., Turner et al, 1999;Rey et al, 2001), and (3) slab detachment or breakoff (e.g., Davies and von Blanckenburg, 1995). These mechanisms have the potential to cause upwelling of the asthenosphere that would perturb the original thermal gradient and lead to lithospheric extension and large volumes of magma generation (Bonin, 2004).…”

“…gravitational variation (e.g., Kay and Kay, 1993;Turner et al, 1999;Rey et al, 2001). Meanwhile, they would also induce large volume of basic magmatism followed by decompressional melting of asthenosphere.…”

“…Meanwhile, they would also induce large volume of basic magmatism followed by decompressional melting of asthenosphere. However, the Paleoproterozoic rocks exposed in the southern margin of the NCC are dominated by intermediate to felsic rocks with minor mafic rocks (e.g., Hu and Lin, 1988;Ren et al, 2000;Zhao et al, 2002bZhao et al, , 2004Zhao et al, , 2015Peng et al, 2004Peng et al, , 2005Peng et al, , 2008Peng et al, , 2015aHe et al, 2008He et al, , 2009Wang et al, 2008;Hu et al, 2010;Bi et al, 2011) arguing against geodynamic background of either lithospheric delamination (e.g., Kay and Kay, 1993) or orogenic collapse (e.g., Turner et al, 1999;Rey et al, 2001). By contrast, slab breakoff is the most feasible mechanism to account for such magmatic characteristics in the southern margin of the NCC.…”