Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Paula Koelemeijer"'
Publikováno v:
Progress in Earth and Planetary Science, Vol 7, Iss 1, Pp 1-16 (2020)
Abstract Mantle tomography reveals the existence of two large low-shear-velocity provinces (LLSVPs) at the base of the mantle. We examine here the hypothesis that they are piles of oceanic crust that have steadily accumulated and warmed over billions
Externí odkaz:
https://doaj.org/article/445f98e3fe4840da8c0f472da015a16f
Autor:
Christodoulos Kyriakopoulos, Nicolas C. Barth, Paula Koelemeijer, Jeff Winterbourne, Renaud Toussaint
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
Externí odkaz:
https://doaj.org/article/b0c6b8b845954ee78af555b1856d80b1
Autor:
Paula Koelemeijer, Jeff Winterbourne
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
Measurements and models of global geophysical parameters such as potential fields, seismic velocity models and dynamic topography are well-represented as traditional contoured and/or coloured maps. However, as teaching aids and for public engagement,
Externí odkaz:
https://doaj.org/article/14797ed3dbdb4c4b8d81d48103e7a4a0
Seismic tomography provides valuable insights into the structure, composition and evolution of the mantle. However, the origin of structures like the Large-Low-Velocity-Provinces (LLVPs) in the lowermost mantle remains debated. Their velocity anomali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e866ad04d1e5fd74553d7e1938ba4ec
https://doi.org/10.5194/egusphere-egu23-8416
https://doi.org/10.5194/egusphere-egu23-8416
For a thorough understanding of the impact of mantle convection on vertical motions of the lithosphere, computational modeling plays a crucial role. Mantle circulation can be modeled by solving the equations of motion of a fluid using Earth-like inpu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71697877955169aa2530bd1b297a6ff5
https://doi.org/10.5194/egusphere-egu23-17312
https://doi.org/10.5194/egusphere-egu23-17312
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-10 (2017)
Large-low-shear-wave velocity provinces (LLSVPs) are present at the core–mantle boundary. Here, the authors show that splitting of Stoneley modes is probably due to a lower density of LLSVPs than the surrounding mantle because of the presence of po
Externí odkaz:
https://doaj.org/article/b4b21a9cc504422aa050b3a5b1d0920a
Publikováno v:
Geophysical Journal International. 228:1962-1974
SUMMARY Stoneley modes are a special subset of normal modes whose energy is confined along the core–mantle boundary (CMB). As such, they offer a unique glimpse into Earth structure at the base of the mantle. They are often observed through coupling
Autor:
Paula Koelemeijer
Publikováno v:
Mantle Convection and Surface Expressions
The dynamic topography of the core-mantle boundary (CMB) provides important constraints on dynamic processes in the mantle and core. However, inferences on CMB topography are complicated by the une...
Publikováno v:
Earth and Planetary Science Letters. 602:117964
Two continent-sized features in the deep mantle, the large low-velocity provinces (LLVPs), influence Earth's supercontinent cycles, mantle plume generation, and geochemical budget. Seismological advances have steadily improved LLVP imaging, but sever
Seismic tomography is a powerful tool to study the deep Earth, given the lack of direct observations. Seismic structures can be interpreted together with constraints from other disciplines, such as geodynamics and mineral physics, to provides valuabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::496815a506787629d3c2f20ab1ef4f65
https://doi.org/10.5194/egusphere-egu22-8734
https://doi.org/10.5194/egusphere-egu22-8734