Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Allen K. McNamara"'
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-9 (2017)
Ultralow velocity zones are detected on the core-mantle boundary, but their origin is enigmatic. Here, the authors find that the global distribution and large variations of morphology of ultralow velocity zones are consistent with most having a compo
Externí odkaz:
https://doaj.org/article/5afd738e00fa4937880d5296217abed9
Autor:
Allen K. McNamara
Publikováno v:
Nature. 603:796-797
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2221f9dc9ba829cd9601a91ba8ec889a
https://doi.org/10.1038/d41586-022-00854-5
https://doi.org/10.1038/d41586-022-00854-5
Autor:
Allen K. McNamara, Divya Allu Peddinti
Publikováno v:
Icarus. 329:251-269
Current astrobiological exploration of the outer solar system is largely driven by understanding planetary ice-ocean systems such as those of Europa and Enceladus. The ice-shell thickness that affects the dynamics of the ice-ocean system is determine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::813d4a9560e7dda6a3b986ad8a71937e
https://doi.org/10.1016/j.icarus.2019.03.037
https://doi.org/10.1016/j.icarus.2019.03.037
Autor:
Allen K. McNamara
Publikováno v:
Tectonophysics. 760:199-220
Seismic tomography reveals 2 extensive regions in the lowermost mantle, beneath Africa and the Pacific, that exhibit lower-than-average seismic wave speeds. These regions have been named the Large Low Shear Velocity Provinces (LLSVPs), and they have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c480f6175432ea9848d83fab6e36449
https://doi.org/10.1016/j.tecto.2018.04.015
https://doi.org/10.1016/j.tecto.2018.04.015
Publikováno v:
Encyclopedia of Solid Earth Geophysics ISBN: 9783030104757
Encyclopedia of Solid Earth Geophysics ISBN: 9789048187010
Encyclopedia of Solid Earth Geophysics ISBN: 9789048187010
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e47767931fc126f203ef67e5de2bbad2
https://doi.org/10.1007/978-3-030-58631-7_131
https://doi.org/10.1007/978-3-030-58631-7_131
Publikováno v:
Encyclopedia of Solid Earth Geophysics ISBN: 9783030104757
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b61fda1b64ae54e0eb9bf5099abdd505
https://doi.org/10.1007/978-3-030-10475-7_131-1
https://doi.org/10.1007/978-3-030-10475-7_131-1
Autor:
Mingming Li, Allen K. McNamara
Publikováno v:
Earth and Planetary Science Letters. 577:117265
Subducted oceanic crust is one of the major sources of compositional heterogeneity in Earth's mantle. It has been proposed that subducted oceanic crust may accumulate at the bottom of the Earth's mantle and cause the seismically-observed, Large Low S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ebd577b5d1f13395f253b62004239d3
https://doi.org/10.1016/j.epsl.2021.117265
https://doi.org/10.1016/j.epsl.2021.117265
Autor:
Mingming Li, Allen K. McNamara
Publikováno v:
Earth and Planetary Science Letters. 500:86-96
The seismically-observed large low shear velocity provinces in the Earth's lowermost mantle have been hypothesized to be caused by thermochemical piles of compositionally distinct, more-primitive material which may be remnants of Earth's early differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::276e75bb6f3f1c088e7bf09c29cf4247
https://doi.org/10.1016/j.epsl.2018.08.009
https://doi.org/10.1016/j.epsl.2018.08.009
Publikováno v:
Journal of Geophysical Research: Solid Earth. 122:1198-1220
Thin patches with ultra-low velocities have been proposed to exist at the core-mantle boundary (CMB). The detection and mapping of ultra-low velocity zones (ULVZs) are difficult, in part, because of limited source-receiver geometries of seismic phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d39993e6f73978cb94d2d15b93adb0c5
https://doi.org/10.1002/2016jb013449
https://doi.org/10.1002/2016jb013449
Publikováno v:
Nature Geoscience. 9:481-489
Two large zones through which seismic waves travel unusually slowly are found at the base of Earth's mantle. These zones are thermally and chemically distinct from the surrounding mantle and may be a source for mantle plumes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3943a97739d54bfa797617db5e9614a4
https://doi.org/10.1038/ngeo2733
https://doi.org/10.1038/ngeo2733