Results 81 to 90 of about 45,633 (206)

Coexistence of calc-alkaline and ultrapotassic alkaline magmas at Mounts Cimini: evidence for transition from the Tuscan to the Roman Magmatic Provinces (central Italy)

Geologica Acta, 2011
The volcanic complex of Mts. Cimini (~0.90-1.30Ma) represents the geographical and chronological transition between the Tuscan Magmatic Province (TMP) and the Roman Magmatic Province (RMP), in central Italy.
M. AULINAS, D. GASPERINI, D. GIMENO TORRENTE, P. MACERA, J.L. FERNÁNDEZ TURIEL, C. CIMARELLI   +5 more
doaj  

Impact Dynamics of Moons Within a Planetary Potential

, 2019
Current lunar origin scenarios suggest that Earth's Moon may have resulted from the merger of two (or more) smaller moonlets. Dynamical studies of multiple moons find that these satellite systems are not stable, resulting in moonlet collision or loss of ...
Aharonson, Oded, Rufu, Raluca
core   +1 more source

The Use of Azimuthal Variation in ScS–S Differential Travel Times to Investigate Possible Anisotropy in the Lowermost Mantle Beneath the Philippines

Geosciences
We collected approximately 500 ScS–S differential travel times passing beneath the Philippines with various azimuths to discuss whether there were azimuthal variations in the ScS–S time residuals.
Satoru Tanaka
doaj   +1 more source

Correlation between plate motion and tomography [PDF]

, 1991
The driving force of plate motions is considered to have a correlation with the upper mantle, but the correlation with the lower mantle is not clear. There might be a heat source in the lower mantle or on the top of the outer core, in addition to ridge
Anderson, Don L., Takata, Toshiko
core  

Physical Properties of Iron in the Inner Core

, 2002
The Earth's inner core plays a vital role in the dynamics of our planet and is itself strongly exposed to dynamic processes as evidenced by a complex pattern of elastic structure.
Ahrens, Alfè, Alfè, Alfè, Alfè, Alfè, Alfè, Anderson, Anderson, Andrault, Asada, Aurnou, Barron, Bergman, Bergman, Bergman, Birch, Birch, Boehler, Boehler, Boehler, Braginsky, Brown, Brown, Brown, Brown, Brown, Brown, Bréger, Buffett, Buffett, Buffett, Buffett, Buffett, Buffett, Buffett, Bullen, Bullen, Clement, Cohen, Cohen, Cohen, Creager, Creager, Creager, Creager, Davies, de Wijs, Deuss, Dubrovinsky, Dubrovinsky, Duffy, Duffy, Dziewonski, Dziewonski, Eckerlin, Fiquet, Funamori, Glatzmaier, Glatzmaier, Gülseren, Hemley, Hill, Hohenberg, Hollerbach, Huang, Ishii, Ishii, Ito, Jackson, Jeanloz, Jeanloz, Jeanloz, Jeanloz, Jeanloz, Jephcoat, Jephcoat, Karato, Karato, Karato, Kohn, Kuang, Körling, Laio, Laske, Lehmann, Li, Lubbers, Lundqvist, Manghnani, Mao, Mao, Mao, Masters, Masters, Matsui, Matthies, Maurer, McMahon, Merkel, Merrill, Morelli, Moroni, Nguyen, Nielsen, Niu, Okal, Okuchi, Olijnyk, Olijnyk, Parrinello, Perdew, Pickett, Poirier, Poirier, Poupinet, Saxena, Shearer, Shen, Shen, Simmons, Singh, Singh, Singh, Singh, Song, Song, Song, Song, Song, Souriau, Stacey, Steinle-Neumann, Steinle-Neumann, Stixrude, Stixrude, Stixrude, Stixrude, Stixrude, Stixrude, Su, Su, Söderlind, Tanaka, Taylor, Tromp, Tromp, Troullier, Tsunoda, Uchida, Uhl, Verhoogen, Verhoogen, Vidale, Vočadlo, Wasserman, Watt, Wenk, Wenk, Wenk, Wentzcovitch, Williams, Woodhouse, Yagi, Yoo, Yoo, Yoshida, Yukutake, Yukutake   +168 more
core   +1 more source

Lengthscales of Mantle Volatile Heterogeneity [PDF]

Goldschmidt Abstracts, 2020
Simon Matthews, Oliver Shorttle, John Maclennan, John F. Rudge, Bramley Murton   +4 more
openaire   +1 more source

Effect of Al on the sharpness of the MgSiO_3 perovskite to post-perovskite phase transition [PDF]

, 2005
By means of static ab-initio computations we investigate the influence of Al on the recently discovered perovskite to post-perovskite phase transition in MgSiO_3. We examine three substitution mechanisms for Al in the two structures: MgSi → AlAl; SiSiO →
Akber-Knutson, S., Asimow, Paul D., Steinle-Neumann, G.   +2 more
core  

Lithospheric Mantle Heterogeneity Drives Delayed Magmatism and Wide Continent‐Ocean Transitions in Rifted Margins

Geophysical Research Letters
The formation of wide, magma‐starved continent–ocean transition (COT) zones remains incompletely understood. We use 2‐D thermo‐mechanical numerical experiments, coupling hydrous mantle melting with parameterized crustal accretion, to explore controls on ...
Yuan Wang, Zhonglan Liu
doaj   +1 more source

Open- versus closed-system magmatism on Mars revealed by shergottites

Communications Earth & Environment
The origin of depleted, intermediate, and enriched geochemical reservoirs on Mars has long been debated, with competing models invoking mantle heterogeneity versus crustal contributions.
Chad J. Peel, Geoffrey H. Howarth, Gelu Costin, Olivier Alard, Stephen Foley   +4 more
doaj   +1 more source

Plume‐Modified Lithosphere Mantle Controlled the Cenozoic Sediment Thickness in the Tarim Basin

Geophysical Research Letters
The Cenozoic sediments are very thick in the southwest Tarim Basin and very thin in the northwest, but what controls these variations is unclear.
Xiao Xiang, Hanlin Chen, Lin Chen, Xi Xu, Xiubin Lin, Zhong Li, Zhiyong Yan   +6 more
doaj   +1 more source