Results 31 to 40 of about 187,304 (228)

Metasomatized lithospheric mantle for Mesozoic giant gold deposits in the North China craton

, 2020
The origin of giant lode gold deposits of Mesozoic age in the North China craton (NCC) is enigmatic because high-grade metamorphic ancient crust would be highly depleted in gold.
Zaicong Wang, Huai Cheng, K. Zong, Xianlei Geng, Yongsheng Liu, Jin-Hui Yang, Fu-guan Wu, H. Becker, S. Foley, C. Wang   +9 more
semanticscholar   +1 more source

Mantle roots of the Emeishan plume: an evaluation based on teleseismic P-wave tomography [PDF]

Solid Earth, 2017
The voluminous magmatism associated with large igneous provinces (LIPs) is commonly correlated to upwelling plumes from the core–mantle boundary (CMB). Here we analyse seismic tomographic data from the Emeishan LIP in southwestern China.
C. He, M. Santosh, M. Santosh
doaj   +1 more source

Mantle-flow diversion beneath the Iranian plateau induced by Zagros’ lithospheric keel

Scientific Reports, 2021
Previous investigation of seismic anisotropy indicates the presence of a simple mantle flow regime beneath the Turkish-Anatolian Plateau and Arabian Plate.
Ayoub Kaviani, Meysam Mahmoodabadi, Georg Rümpker, Simone Pilia, Mohammad Tatar, Faramarz Nilfouroushan, Farzam Yamini-Fard, Ali Moradi, Mohammed Y. Ali   +8 more
doaj   +1 more source

Constraints on the lithospheric structure and tectonics of Archean Dharwar Craton, southern India from geophysical and geological data: Evidence for modified lithosphere

Geosystems and Geoenvironment, 2022
Cratons are the stable portions of the continents for at least the past two billion years. Their longevity is generally attributed to their thick, cold, rheologically strong and chemically depleted subcrustal mantle lithosphere.
V. Vijaya Rao, Damodara Nara
doaj   +1 more source

Lithospheric structure in the Baikal–central Mongolia region from integrated geophysical‐petrological inversion of surface‐wave data and topographic elevation

Geochemistry, Geophysics, Geosystems, 2012
Recent advances in computational petrological modeling provide accurate methods for computing seismic velocities and density within the lithospheric and sub‐lithospheric mantle, given the bulk composition, temperature, and pressure within them.
J. Fullea, S. Lebedev, M. R. Agius, A. G. Jones, J. C. Afonso   +4 more
doaj   +1 more source

Lithospheric Thinning by Mantle Plumes [PDF]

ASEG Extended Abstracts, 2016
Thermo-mechanical thinning of the lithosphere by mantle plumes is essential for intra-plate volcanism, the initiation of rifting, the evolution of Earth’s lower continental crust and the genesis of metals, diamonds and hydrocarbons. To develop a new understanding of how a mantle plume thins the overlying lithosphere beneath moving plates, we use 2-D ...
Manon Dalaison, Rhodri Davies
openaire   +1 more source

Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton

Scientific Reports, 2021
The North China craton (NCC) was dominated by tectonic extension from late Cretaceous to Cenozoic, yet seismic studies on the relationship between crust extension and lithospheric mantle deformation are scarce.
Xingpeng Dong, Dinghui Yang, Fenglin Niu, Shaolin Liu, Ping Tong   +4 more
doaj   +1 more source

African cratonic lithosphere carved by mantle plumes [PDF]

Nature Communications, 2020
AbstractHow cratons, the ancient cores of continents, evolved since their formation over 2.5 Ga ago is debated. Seismic tomography can map the thick lithosphere of cratons, but its resolution is low in sparsely sampled continents. Here we show, using waveform tomography with a large, newly available dataset, that cratonic lithosphere beneath Africa is ...
Nicolas Luca Celli, Sergei Lebedev, Andrew J. Schaeffer, Carmen Gaina   +3 more
openaire   +4 more sources

Plume-Induced Subduction Initiation: Revisiting Models and Observations

Frontiers in Earth Science, 2021
Subduction initiation induced by a hot and buoyant mantle plume head is unique among proposed subduction initiation mechanisms because it does not require pre-existing weak zones or other forces for lithospheric collapse.
Marzieh Baes, Marzieh Baes, Robert J. Stern, Scott Whattam, Taras V. Gerya, Stephan V. Sobolev, Stephan V. Sobolev   +6 more
doaj   +1 more source

Mantle Anisotropy in NW Namibia From XKS Splitting: Effects of Asthenospheric Flow, Lithospheric Structures, and Magmatic Underplating

Geophysical Research Letters, 2023
The presence of the Etendeka flood basalts in northwestern Namibia is taken as evidence for the activity of the Tristan da Cunha mantle plume during the continental breakup between Africa and South America.
Abolfazl Komeazi, Ayoub Kaviani, Georg Rümpker   +2 more
doaj   +1 more source