The Laramide orogeny is the Late Cretaceous to Palaeocene (80^55 Ma) orogenic event that gave rise to the Rocky Mountain fold and thrust belt in Canada, the Laramide block uplifts in the USA, and the Sierra Madre Oriental fold and thrust belt in Mexico. The leading model for driving Laramide orogenesis in the USA is flat-slab subduction, whereby stress coupling of a subhorizontal oceanic slab t...

Island arcs are postulated as the juvenile components that contribute to growth of continental crust. Growth rates arc crusts were previously computed using crustal thicknesses derived from seismic data. Consequently, oceanic island also constrained by limited data availability. This work presents first comparison gravity-derived magmatic Western Pacific arcs. We used statistical correlation be...

Arc magmas are generated by partial melting of a mantle wedge modified inputs from subducting sediment and igneous ocean crust. Despite this uniform tectonic process, global arc-front stratovolcano compositions exhibit trace element abundances that can vary more than an order magnitude. All incompatible elements correlate well, including those thought to be derived, “fluid-mobile”, derived. It ...

We analyze mantle structure under South America in the DETOX-P1 seismic tomography model, a global-scale, multifrequency inversion of teleseismic P waves. inverts most extensive data set broadband, waveform-based traveltime measurements to date, complemented by analyst-picked traveltimes from ISC-EHB catalog. The is sampled ?665,000 cross-correlation measured on 529 American broadband stations ...

Species richness on oceanic islands has been related to a series of ecological factors including island size and isolation (i.e. the Equilibrium Model of Island Biogeography, EMIB), habitat diversity, climate (i.e., temperature and precipitation) and more recently island ontogeny (i.e. the General Dynamic Model of oceanic island biogeography, GDM). Here we evaluate the relationship of these fac...

Bulk-rock major and trace element geochemistry of a range of eclogite, garnet blueschist and garnet amphibolite rocks from northern New Caledonia has been determined in order to geochemically characterise subducted oceanic crust. The rocks experienced peak metamorphic conditions of 1.9 GPa and 600 jC and represent excellent samples of oceanic crust that was subducted to depths of approximately ...