Results 131 to 140 of about 771,265 (286)

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

The Influence of Rotation on the Preservation of Heterogeneities in Magma Oceans

Geochemistry, Geophysics, Geosystems
Understanding the composition of lavas erupted at the surface of the Earth is key to reconstruct the long‐term history of our planet. Recent geochemical analyses of ocean island basalt samples indicate the preservation of ancient mantle heterogeneities ...
B. Thomas, H. Samuel, C. G. Farnetani, J. Aubert, C. Chauvel   +4 more
doaj   +1 more source

Stability of (Mg,Fe)SiO3 perovskite and the structure of the lowermost mantle [PDF]

, 1992
Thermodynamic analysis shows that (Mg,Fe)SiO3 perovskite is stable throughout the likely pressure, temperature and compositional regime of the Earth's mantle.
Bukowinski, MST, Stixrude, L
core  

Helium Isotope Variations in Gulf of Aden Basalts and the Surface Expression of Mantle Heterogeneity During Afar Plume—Triple Junction Interaction

Geochemistry, Geophysics, Geosystems
New helium isotope data for basalt glasses from the Gulf of Tadjoura and Gulf of Aden reveal a mantle plume signal that has 3He/4He up to 17 RA. In the Gulf of Aden, plume helium is detectable ∼380 km from the Afar triple junction, up to the Shukra El ...
D. W. Graham, P. J. Michael
doaj   +1 more source

Petrological features of Subei Basin (Eastern China) lithospheric mantle and their relationships with H2O contents in NAMs [PDF]

, 2010
The Subei basin is located east of the Tanlu fault, a major discontinuity which separates the Archean North China Craton from the Proterozoic Yangtze Craton.
Hao, Yantao
core  

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

The Earth's Heterogeneous Mantle [PDF]

, 2015
openaire   +1 more source

CHAOTIC UPPER MANTLE HETEROGENEITY

, 2010
[1] The intrinsic structure of the isotope data set of samples from the Mid-Atlantic Ridge and East Pacific Rise, believed to represent the isotopic composition of their mantle source, reveals a close relationship between sample spatial distribution and their geochemical features. The spatial distribution of their isotopic heterogeneity is self-similar
Pietro Armienti, D. Gasperini
openaire   +1 more source