The broad belt of intraplate volcanism in the East Atlantic between 25 and 37 N is proposed to have formed by two adjacent hotspot tracks (the Madeira and Canary tracks) that possess systematically different isotopic signatures reflecting different mantle source compositions. To test this model, Hf isotope ratios from volcanic rocks from all individual islands and all major seamounts are presen...

The flexural bulge in central India resulting from India's collision with Tibet has a wavelength of approximately 670 km. It is manifest topographically and in the freeair gravity anomaly and the geoid. Calculations of the stress distribution within a flexed Indian plate reveal spatial variations throughout the depth of the plate and also a function of distnace from the Himalaya. The wavelength...

Abstract The magma plumbing systems of volcanoes in subduction and divergent tectonic settings are relatively well known, whereas those intraplate remain elusive; robust geophysical information on the pathways storage zones is lacking. We inverted magnetotelluric data to image system an monogenetic volcanic field located above stagnant Pacific slab northeast China. identified a complex, vertica...

The Iberian Peninsula and the Maghreb experience moderate earthquake activity and oblique, ∼ NW–SE convergence between Africa and Eurasia at a rate of ∼ 5 mm/yr. Coeval extension in the Alboran Basin and a N35°E trending band of active, left-lateral shear deformation in the Alboran–Betic region are not straightforward to understand in the context of regional shortening, and evidence complexity ...

The relationship between plate boundary forces and the observed stress field in the Pacific Northwest is established using numerical niodels of continental deformation. Because the orientation of the greatest horizontal principal stress throughout the Pacific Northwest differs considerably from the direction of convergence between the Juan de Fuca and North American plates. the relationship haw...