Back-arc basins such as the ones behind island-arcs of Western Pacific Ocean or in Mediterranean Sea are ubiquitous structures Earth. They extensional forming overriding plate subduction zones and similarly to continental rifts, they can exhibit different structural styles from narrow, localized rifting wide-rift extension. While these have been long recognized, factors controlling style extens...

The Bransfield Basin is a young (∼4 Ma) back-arc basin related to the remnant subduction of Phoenix Plate that once existed along entire Pacific margin Antarctic Peninsula. Based on recently deployed amphibious seismic network, we use ambient noise tomography obtain S-wave velocity structure in Central (CBB). Combining with stress field inverted from focal mechanisms, our images reveal CBB suff...

The active tectonics in Myanmar is governed by the ongoing northward indentation and obliquely-eastward subduction of India into Eurasia. So far, detailed seismic structure crust uppermost mantle at eastern flank India-Eurasia collision zone remains highly debated. With waveforms recorded 79 broadband stations Myanmar, we build a regional shear velocity model depth range 0–80 km joint inversion...

The transition from subduction to transform motion along horizontal terminations of trenches is associated with tearing the subducting slab and strike-slip tectonics in overriding plate. One prominent example northern Tonga zone, where abundant faulting NE Lau back-arc basin plate boundary asymmetric rollback. Here, we address fundamental question: how does this subduction-transform influence s...

West Rota Volcano (WRV) is a recently discovered extinct submarine volcano in the southern Mariana Arc. It is large (25 km diameter base), shallow (up to 300 m below sealevel), and contains a large caldera (6 ¥ 10 km, with up to 1 km relief). The WRV lies near the northern termination of a major NNE-trending normal fault. This and a second, parallel fault just west of the volcano separate uplif...

sarygamesh basin one of the bulhary chay tributary take place in moghan plain, northeastern azarbyjan area in iran and south edge of kora- araz zone. aims of this research are study specificities and geomorphic evolution of sarygamesh basin, survey rivers work on structure and geologic formation, and corresponding hydrographic with earth structure. toward above aim is used to litologic, structu...

a r t i c l e i n f o a b s t r a c t Keywords: full-wave ambient noise tomography the Cascadia subduction zone low-velocity anomaly decompressional melting Melt generation and volcanism at subduction zones may result from several possible processes: hydration of the mantle wedge by fluid released from the slab, subduction-induced mantle upwelling beneath the back-arc, and heating of downgoing ...

The Gulf of Lions—Ligurian basin, in the Western Mediterranean, opened from end Oligocene to Miocene as a back-arc basin driven by rollback Ionian slab. Geophysical surveys across margin have explored crustal structure and continent-ocean transition (COT), but its location petrological nature is still matter debate. Here, we apply joint refraction reflection travel-time tomography that combines...