the makran subduction zone in southeastern iran and southern pakistan is where the oceanic crust of the arabian plate (oman sea) is subducting beneath eurasia. compared to other subduction zones in the world, the makran subduction zone has some unusual features, including different seismicity patterns in its eastern and western parts. also, the quaternary volcanoes in the eastern part of makran...

Dunites in ophiolites form by pyroxene dissolution and olivine precipitation during melt-peridotite interaction. We present structural geochemical data on peridotites from the Batin region (Wadi Tayin massif) of Oman ophiolite, where an exceptionally large (∼9.5 km long) dunite body was sampled ICDP Drilling Project (BA4A borehole). 900–1,200 m beneath petrological Moho, this is overlain harzbu...

Introduction. The topography [1] and gravity [2] of the Moon are dominated by the signatures of impact basins and the mascon gravity anomalies contained within. A method of generating higher resolution crustal thickness models by utilizing the symmetry of the basins is here presented, providing a refined view of the subsurface structure of the basins, with a focus on Orientale. The crustal stru...

The Bransfield Strait is a tectonically active back-arc rift basin located between the South Shetland archipelago (SSI) and Antarctic Peninsula (AP). We use teleseismic P-wave receiver functions from twelve seismic stations in order to improve current understanding of crustal upper mantle structure region. calculate thickness average Vp/Vs ratio crust, Mantle Transition Zone (MTZ) their spatial...

The Re-Os isotope system is increasingly providing new insight into continental dynamics due to the fact that it is the only radiogenic isotope system that provides information on melt depletion events (hence lithosphere formation) in the uppermost mantle. Here we review application of the ReOs isotopic system to dating melt depletion in peridotites. In particular, we highlight examples of how ...

Abstract. In the frame of AlpArray project we analyse teleseismic data from permanent and temporary stations Alpine region to study seismic discontinuities down about 140 km depth. We average broadband S-waveform retrieve S-to-P converted signals below stations. order avoid processing artefacts, no deconvolution or filtering is applied, S arrival times are used as reference for stacking. show a...

Continent–continent collisions are an important tectonic process and have played a fundamental role in the evolution of the modern continents. A combination of geological and geophysical data has provided new constraints on the structure and temporal evolution of these orogens. Magnetotelluric (MT) studies have been an important part of these studies since they can constrain the fluid content a...

S U M M A R Y It is now widely accepted that elastic properties of the continental lithosphere and the underlying sublithospheric mantle are both anisotropic and laterally heterogeneous at a range of scales. To fully exploit modern three-component broad-band array data sets requires the use of comprehensive modelling tools. In this work, we investigate the use of a wide-angle, one-way wave equa...

Removing the crustal signature from teleseismic travel times is an important procedure to reduce the trade-off between crustal and mantle velocity heterogeneities in seismic tomography. Because reverberations of longand short-period body-wave arrivals in the crust affect the waveforms of the direct arrivals differently, the crustal effects on travel times measured by waveform cross correlation ...

in this study we use the p receiver function technique to determine the moho depth and vp/vs ratio for 8 short period stations of qochan and mashhad seismic networks and map the variations of moho depth under kope dagh region. it is shown that a receiver function can provide a relatively good point measurement of moho depth under a short period station. the crustal thickness estimated from the ...