Results 41 to 50 of about 315,024 (237)
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.
Zai-Cong Wang +9 more
semanticscholar +1 more source
Magmatism of the Kenya Rift Valley : a review. [PDF]
, 2003 Tertiary–Recent magmatism in the Kenya Rift Valley was initiated c. 35 Ma, in the northern part of Kenya. Initiation of magmatism then migrated southwards, reaching northern Tanzania by 5–8 Ma.
MacDonald, Raymond
core +3 more sources
Modification of the lithospheric stress field by lateral variations in plate-mantle coupling [PDF]
, 2009 The presence of deeply penetrating continental roots may locally increase the magnitude of basal shear tractions by up to a factor of 4 compared to a layered viscosity structure.
Naliboff, JB +5 more
core +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
Long-term memory of subduction processes in the lithospheric mantle: evidence from the geochemistry of basic dykes in the Gardar Province of South Greenland [PDF]
, 2002 The rift-related magmas of the Proterozoic Gardar Igneous Province were emplaced across the contact between the South Greenland Archaean craton and the Palaeoproterozoic Ketilidian mobile belt.
R. M. Ellam +6 more
core +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 +8 more
doaj +1 more source
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 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
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 +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 +3 more
openaire +4 more sources