Results 51 to 60 of about 220,882 (295)

Sulfur loss from subducted altered oceanic crust and implications for mantle oxidation [PDF]

, 2020
© The Author(s), [year]. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Walters, J. B., Cruz-Uribe, A. M., & Marschall, H. R.
Cruz‐Uribe, Alicia M., Marschall, Horst R., Walters, Jesse B.   +2 more
core   +1 more source

Subduction-related oxidation of the sublithospheric mantle evidenced by ferropericlase and magnesiowüstite diamond inclusions

Nature Communications, 2022
This article reports finding of a highly oxidised mineral in diamond inclusion derived from mantle transition zone or lower mantle, very reduced areas on our planet. Such oxidised material is likely linked to subduction of carbonates into this region.
Ekaterina S. Kiseeva, Nester Korolev, Iuliia Koemets, Dmitry A. Zedgenizov, Richard Unitt, Catherine McCammon, Alena Aslandukova, Saiana Khandarkhaeva, Timofey Fedotenko, Konstantin Glazyrin, Dimitrios Bessas, Georgios Aprilis, Alexandr I. Chumakov, Hiroyuki Kagi, Leonid Dubrovinsky   +14 more
doaj   +1 more source

Upper- and mid-mantle interaction between the Samoan plume and the Tonga-Kermadec slabs [PDF]

, 2016
Mantle plumes are thought to play a key role in transferring heat from the core\u2013mantle boundary to the lithosphere, where it can significantly influence plate tectonics. On impinging on the lithosphere at spreading ridges or in intra-plate settings,
AM Dziewoński, AM Volpe, AMG Ferreira, C Bassin, C DeMets, D Mainprice, D Mainprice, D Mainprice, D Zhao, DL Kohlstedt, E Kaminski, ER Engdahl, FA Capitanio, G Morra, GS Robertson, H Takeuchi, H-R Wenk, J Gill, J Ritsema, J Wookey, JAD Connolly, JE Lupton, JH Woodhouse, JH Woodhouse, JH Woodhouse, KA Druken, M Bevis, M Faccenda, M Faccenda, M Faccenda, M Gurnis, MG Jackson, ML Lytle, MS Thorne, N Schmerr, OL Anderson, P Carrez, P Cordier, PG Betts, PG Betts, R Hall, RJ Poreda, S Turner, S-J Chang, S-J Chang, SR Hart, SW French, UR Christensen, W Rodi, W-P Chen, WG Mason, WP Schellart, WP Schellart, Y Fukao, Y Lagabrielle   +54 more
core   +2 more sources

Global seismic data reveal little water in the mantle transition zone

Earth and Planetary Science Letters, 2016
Christine Houser
exaly   +2 more sources

Geophysical characterisation of the ocean–continent transition at magma-poor rifted margins [PDF]

, 2009
Geophysical characterisation of the ocean-continent transition (OCT) at magma-poor riftedmargins has focused primarily on the determination of P wave velocities using wide-angleseismic techniques. Such experiments have shown that the OCT is heterogeneous,
Minshull, Timothy A.
core   +1 more source

Seismic anisotropy in the core-mantle transition zone [PDF]

Geophysical Journal International, 1998
Split S waves observed at Hockley, Texas from events in the Tonga–Fiji region of the southwest Pacific show predominantly vertically polarized shear-wave (SV ) energy arriving earlier than horizontally polarized (SH) energy for rays propagating horizontally through D″.
Jay Pulliam, Mrinal K. Sen
openaire   +1 more source

Thermodynamic and Elastic Properties of Magnesite at Mantle Conditions: First‐Principles Calculations

Geochemistry, Geophysics, Geosystems, 2018
Magnesite (MgCO3) is a likely main host of carbonates in the mantle and plays an important role in the transport and storage of carbon in the Earth's mantle. Its physical properties at high pressure and high temperature (PT) are crucial for understanding
Chao Yao, Zhongqing Wu, Fan Zou, Weidong Sun   +3 more
doaj   +1 more source

Juan de Fuca subduction zone from a mixture of tomography and waveform modeling [PDF]

, 2012
Seismic tomography images of the upper mantle structures beneath the Pacific Northwestern United States display a maze of high-velocity anomalies, many of which produce distorted waveforms evident in the USArray observations indicative of the Juan de ...
Chu, Risheng, Helmberger, Don V., Schmandt, Brandon   +2 more
core   +1 more source

Structure of the core‐mantle transition zone [PDF]

Eos, Transactions American Geophysical Union, 1989
A remarkable diversity of geophysical techniques is being used to probe the transition zone between the outer core and the lower mande. This inaccessible region, 2900 km below the Earth's surface, is now recognized to profoundly influence the style of mantle convection, thermal and chemical plume formation, secular variation, and possibly reversals of ...
openaire   +2 more sources

Shallow Lower Mantle Viscosity Modulates the Pattern of Mantle Structure

Geochemistry, Geophysics, Geosystems, 2020
Tomographic images of Earth's mantle reveal that structure, even at the largest spatial scales, does not remain correlated across all mantle depths.
Lourenço D. L., Rudolph M. L.
doaj   +1 more source