The Role of Crustal Buoyancy in the Generation and Emplacement of Magmatism During Continental Collision.

ABSTRACT: During continental collision, considerable amounts of buoyant continental crust subduct to depth and subsequently exhume. Whether various exhumation paths contribute to contrasting styles of magmatism across modern collision zones is unclear. Here we present 2D thermomechanical models of continental collision combined with petrological databases to investigate the effect of the main contrasting buoyancy forces, in the form of continental crustal buoyancy versus oceanic slab age (i.e., its thickness). We specifically focus on the consequences for crustal exhumation mechanisms and magmatism. Results indicate that it is mainly crustal density that determines the degree of steepening of the subducting continent and separates the models' parameter space into two regimes. In the first regime, hi

SUBMITTER: Schliffke N 

PROVIDER: S-EPMC6988479 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature