Results 101 to 110 of about 120,010 (213)

Seismic Radial Anisotropy of the Southern Tibetan Rifts From Ambient Noise Adjoint Tomography: Basal Shear and Localized Crustal Weak Zones Promote Rifting

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract North–south‐trending rifts in southern Tibet record E–W extension within the Tibetan Plateau, closely linked to high gravitational potential energy from collisional thickening and northward underthrusting of the Indian lower crust. To reveal how basal shear is transmitted upward and controls rifting, we use ambient noise adjoint tomography ...
Taozhi Wang, Zhen Guo, Yanbin Wang, Lipeng He, Xiaobo Tian   +4 more
wiley   +1 more source

A Synoptic View of Mantle Plume Shapes Enabled by Virtual Reality

Geochemistry, Geophysics, Geosystems
The shapes of mantle plumes are sensitive to mantle viscosity, density structure, and flow patterns. Increasingly, global tomographic models reveal broad plume conduits in the lower mantle and highly tilting conduits in the mid and upper mantle. Previous
Qianyi Lu, Maxwell L. Rudolph
doaj   +1 more source

Hydrothermal Contributions to Elevated Dissolved Organic Carbon Concentrations and Cycling Along the Mid‐Atlantic Ridge

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Hydrothermal systems along the Mid‐Atlantic Ridge (MAR) are spatially variable sources of dissolved organic carbon (DOC) to the deep ocean, with implications for carbon cycling and trace‐metal transport. We present DOC measurements from four research cruises focusing on major vent fields at Menez Gwen, Rainbow, Lost City, Broken Spur and TAG ...
R. E. Tuerena, C. Mahaffey, C. Vic, A. J. M. Lough, C. E. Davis, M. Lohan, A. Tagliabue, R. Mather, J. Sharples   +8 more
wiley   +1 more source

Essence of the Late Mesozoic ore-magmatic systems of Aldan Shield

Литосфера, 2016
The original cause of the Late Mesozoic tectonic-magmatic and mineragenic activation at the Pre-Cambrian Aldan Shield was the existence of the stagnated oceanic slab in the mantle transitional zone.
V. G. Khomich, N. G. Boriskina
doaj   +2 more sources

Comparing Geochemical and Geodynamical Models of Plume and Ridge Mantle Source Composition

Geochemistry, Geophysics, Geosystems
We use a multidisciplinary approach to investigate how the parameter space of mantle convection affects present‐day mantle composition. We compare 22 forward geodynamical mantle circulation model simulations against 24 variants of a geochemical inversion
Paul Béguelin, James Panton, Morten Andersen, Tim Elliott, Huw Davies, Joel Rodney, Abigail Plimmer   +6 more
doaj   +1 more source

Asymmetric three-dimensional topography over mantle plumes

, 2014
International audienceThe role of mantle–lithosphere interactions in shaping surface topography has long been debated1–3. In general3,4, it is supposed that mantle plumes and vertical mantle flows result in axisymmetric, long-wavelength topography, which
Burov, Evguenii,, Gerya, Taras
core   +1 more source

Dynamics of mantle plumes [PDF]

, 2016
Mantle plumes are a link between different scales in the Earth’s mantle: They are an important part of large-scale mantle convection, transporting material and heat from the core-mantle boundary to the surface, but also affect processes on a smaller scale, such as melt generation and transport and surface magmatism.
openaire  

Crystallization temperatures of tholeiite parental liquids: Implications for the existence of thermally driven mantle plumes

, 2016
To compare magmatic crystallization temperatures between ocean island basalt (OIB) proposed to be plume-related and normal mid-ocean ridge basalt (MORB) parental liquids, we have examined and compared in detail three representative magmatic suites from ...
Falloon, Trevor, Danyushevsky, Leonid V., Green, David   +2 more
core   +1 more source

Subducted Carbon From Mantle Plume in Mid‐Ocean Ridge Basalts

Geophysical Research Letters
Deciphering the Earth's deep carbon cycle, from mantle plumes to mid‐ocean ridges, remains incompletely understood. In this study, we analyze the magnesium isotope composition of basalts collected from the South Mid‐Atlantic Ridge (SMAR), which have been
Haitao Zhang, Quanshu Yan, Xuefa Shi, Chuanshun Li, Fang Huang, Qiuyu Wen   +5 more
doaj   +1 more source

The Mantle Plume Debates

Open Journal of Yangtze Oil and Gas, 2018
We all know that most volcanic activities occur at the plate boundaries because some deformations take place on plate margins. However, some volcanoes are found in oceans which are not plate margins and always form liner islands and seamount, such as the Hawaiian Emperor chain in the Pacific.
openaire   +2 more sources