Multi-channel seismic reflection and sub-bottom profiling data reveal landward-dipping normal faults as potential conduits for mantle-derived fluids in the coseismic slip area of 2011 Tohoku earthquake (M w 9.0). Normal below helium isotope anomaly sites appear to develop through forearc crust (i.e., seafloor sedimentary section Cretaceous basement) evolve lower dip angles extension progresses ...

SUMMARY We present PRISM3D, a 3-D reference seismic model of P- and S-wave velocities for Iberia adjacent areas. PRISM3D results from the combination most up-to-date earth models available region. It extends horizontally 15°W to 5°E in longitude, 34°N 46°N latitude vertically 3.5 km above 200 below sea level, is modelled on regular grid with 10 0.5 node spacing horizontal vertical directions, r...

Detailed crustal and uppermost mantle structure is imaged for the first time utilizing ?4 years of broadband seismic data newly collected in Timor-Leste Nusa Tenggara Timor region Indonesia. We apply three techniques, ambient noise tomography, teleseismic P wave receiver function, coda autocorrelation, to resolve a 3D Vs model Moho structure. Our tomographic images show low-velocity anomalies (...

the iranian plateau is characterized by diverse tectonic domains, including the continental collisions (e.g. the zagros and alborz mountains) and oceanic plate subduction (e.g. makransubduction zone). to derive a detailed image of the crust–mantle (moho) and lithosphere–asthenosphere (lab) boundaries in some tectonically units of the iranian plateau, we used a large number of s receiver functio...

Abstract Suprasubduction zone (SSZ) ophiolites of the northern Appalachians (eastern North America) have provided key constraints on fundamental tectonic processes responsible for evolution Appalachian orogen. The central and southern Appalachians, which extend from New York to Alabama (USA), also contain numerous ultramafic-mafic bodies that been interpreted as ophiolite fragments; however, th...

Strongly SiO2-undersaturated alkalic rocks (Mg# > 50, SiO2 ≤ 45 wt%, Na2O + K2O ≥ 3 wt%) occur in three early-stage (Sarnu-Dandali, Mundwara, Bhuj) and one late-stage (Murud-Janjira) rift-associated volcanic complexes the Cretaceous-Paleogene Deccan Traps flood basalt province of India. Thermobarometry based on clinopyroxene-liquid equilibrium suggests that they mostly crystallized beneath Moho...

• S-wave velocity gradients with depth and absolute velocities in the Alaskan crust mantle. Thin upper plate lithosphere low asthenospheric reflect subduction effects. Thick high northern Alaska, part due to original tectonic terranes. The present-day lithospheric structure of Alaska is result a unique history terrane accretion that controls thickness rheology. To provide new constraints on man...

To investigate the geodynamic processes of Mesozoic large-scale mineralization in South China, we deployed a 350-km-long, wide-angle seismic reflection/refraction sounding profile between Yingshan Hubei and Changshan Zhejiang. This traverses Cu-Au metallogenic belt middle lower reaches Yangtze River (YMB), Jiangnan W-polymetal (JNMB), Qinhang Cu-polymetal (QHMB). Our imaging results reveal vari...

in this study, we used teleseismic data which was recorded by 5 stations (dhr, ghg, kom, lin and vis) of the kermanshah seismic network from 2003 to 2007 with mb?5.5 and epicentral distances from 30° to 95°. the crustal structure beneath these stations was determined by the modeling of the p receiver functions. the main phases, which were observed in our final p receiver functions, are moho con...

[1] Ultramafic xenoliths of spinel dunite, harzburgite, lherzolite, amphibole/phlogopite-bearing pyroxenite, and clinopyroxenite occur in andesitic pyroclastic debris from the 1964 eruption of Shiveluch volcano, Kamchatka. Peridotites have coarse/protogranular, porphyroclastic, and granuloblastic textures, abundant kink-banded olivine, and refractory mineral compositions with forsteritic olivin...