Investigation of the crustal and upper-mantle structure of the eastern Pontides orogenic belt (NE, Turkey): a receiver-function study
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Seismology"
DOI: 10.1007/s10950-019-09818-1
Abstract: In this study, we use teleseismic P and S receiver functions (i.e., S-to-P and P-to-S converted signals) and their joint inversions to determine seismic discontinuities in the crust and upper mantle. Eight permanent broadband stations… read more here.
Keywords: eastern pontides; velocity; pontides orogenic; orogenic belt ... See more keywords
Shear wave velocity structure of the crust and upper mantle in Southeastern Tibet and its geodynamic implications
Sign Up to like & getrecommendations! Published in 2020 at "Science China Earth Sciences"
DOI: 10.1007/s11430-020-9625-3
Abstract: Southeastern Tibet, which has complex topography and strong tectonic activity, is an important area for studying the subsurface deformation of the Tibetan Plateau. Through the two-station method on 10-year teleseismic Rayleigh wave data from 132… read more here.
Keywords: fault; zone; crust; low velocity ... See more keywords
A common deep source for upper-mantle upwellings below the Ibero-western Maghreb region from teleseismic P-wave travel-time tomography
Sign Up to like & getrecommendations! Published in 2018 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2018.07.024
Abstract: Upper-mantle upwellings are often invoked as the cause of Cenozoic volcanism in the Ibero-western Maghreb region. However, their nature, geometry and origin are unclear. This study takes advantage of dense seismic networks, which cover an… read more here.
Keywords: western maghreb; mantle; ibero western; upper mantle ... See more keywords
Noble gas systematics in new popping rocks from the Mid-Atlantic Ridge (14°N): Evidence for small-scale upper mantle heterogeneities
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.04.037
Abstract: Abstract The origin and evolution of terrestrial volatiles is a fundamental question in Earth and planetary sciences. To better address this, it is necessary to estimate the present-day isotopic and elemental composition of volatiles in… read more here.
Keywords: gas; upper mantle; noble gas; systematics ... See more keywords
Earth's deepest earthquake swarms track fluid ascent beneath nascent arc volcanoes
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.05.048
Abstract: Most of the world's explosive volcanoes are located in volcanic arcs, formed by fluid-fluxed melting of upper mantle rocks. The fluids that facilitate melting are released from subducted tectonic plates as they sink into the… read more here.
Keywords: earthquake; earthquake swarms; upper mantle; beneath ... See more keywords
Electrical conductivity of hydrous silicate melts: Implications for the bottom-up hydration of Earth's upper mantle
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.115712
Abstract: Abstract The upwelling of the hydrous mantle transition zone triggers dehydration-induced partial melting atop the 410-km discontinuity. Here we investigate the electrical conductivity of hydrous silicate melts in the 200-400 km depth range and explore… read more here.
Keywords: h2o; electrical conductivity; upper mantle; hydration ... See more keywords
Melting phase relations in the systems Mg2SiO4-H2O and MgSiO3-H2O and the formation of hydrous melts in the upper mantle
Sign Up to like & getrecommendations! Published in 2017 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2016.12.042
Abstract: High-pressure and high-temperature melting experiments were conducted in the systems Mg2SiO4–H2O and MgSiO3–H2O at 6 and 13 GPa and between 1150 and 1900 °C in order to investigate the effect of H2O on melting relations… read more here.
Keywords: upper mantle; h2o; mg2sio4 h2o; systems mg2sio4 ... See more keywords
An internally consistent pressure calibration of geobarometers applicable to the Earth's upper mantle using in situ XRD
Sign Up to like & getrecommendations! Published in 2018 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2017.10.031
Abstract: Abstract We have performed an experimental cross calibration of a suite of mineral equilibria within mantle rock bulk compositions that are commonly used in geobarometry to determine the equilibration depths of upper mantle assemblages. Multiple… read more here.
Keywords: geobarometers applicable; mantle; using situ; upper mantle ... See more keywords
Diopside, enstatite and forsterite solubilities in H2O and H2O-NaCl solutions at lower crustal and upper mantle conditions
Sign Up to like & getrecommendations! Published in 2020 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2020.03.035
Abstract: Abstract The interaction of fluids with rock-forming minerals plays an important role in the chemical evolution of mafic and ultramafic rocks in the lower crust and upper mantle. Recent work highlights the importance of salt-rich… read more here.
Keywords: h2o nacl; nacl solutions; h2o; solubility ... See more keywords
Evidence of multifaceted SKS/SKKS splitting directions in the Sikkim Himalaya, India
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Geodynamics"
DOI: 10.1016/j.jog.2018.02.003
Abstract: Abstract We have investigated the anisotropy strength and fast-axis orientation using an SKS/SKKS splitting technique of seismic phases at Sikkim Himalaya, which is a seismically active zone situated in the central portion of the Great… read more here.
Keywords: strength; sks skks; skks splitting; sikkim himalaya ... See more keywords
Seismological evidence of the Hales discontinuity in northeast India
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Asian Earth Sciences"
DOI: 10.1016/j.jseaes.2017.12.015
Abstract: The crust and upper mantle shear wave velocity structure beneath the northeast India is estimated by joint inversion of Rayleigh wave group velocity and receiver function, calculated from teleseismic earthquakes data recorded at nine broadband… read more here.
Keywords: shear wave; velocity; hales discontinuity; upper mantle ... See more keywords