Results 111 to 120 of about 12,547 (243)

Generation of Channelized Mantle Flow Beyond the Rift Zone Accelerated by Thermal Heterogeneity and Rift Propagation

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Rifting is a tectonic process that leads to extensive magmatic activity, continental breakup, and the formation of new oceanic crust. The interplay between rifting and dynamic mantle flow driven by thermal heterogeneity in the mantle along the rift‐axis can influence magmatism and deformation beyond the rift zone.
Min‐Seok Jang, Byung‐Dal So
wiley   +1 more source

Crustal fault reactivation facilitating lithospheric folding/buckling in the central Indian Ocean

, 1996
High-quality, normal-incidence seismic reflection data confirm that tectonic deformation in the central Indian Ocean occurs at two spatial scales: whole lithosphere folding with wavelengths varying between 100 and 300 km, and compressional reactivation ...
Beekman, F., Cloetingh, S., Bull, Jonathan M., Scrutton, R.A.   +3 more
core  

Receiver Function Imaging of the Mantle Transition Zone Beneath the East Sayan Mountains and Adjacent Area in Central Asia: Implications for Lithospheric Drip and Intraplate Cenozoic Volcanism

Geophysical Research Letters
To provide constraints on the formation mechanisms of intracontinental volcanisms and intriguing lithospheric thickness variations in the East Sayan Mountains and surrounding areas, we stack P‐to‐s receiver functions to image the 410‐km and 660‐km ...
Yangyang Liao, Kelly H. Liu, Stephen S. Gao   +2 more
doaj   +1 more source

Geochemical and Isotopic Constraints on Long‐Lived Source Enrichment and Mantle Evolution in Paleoproterozoic Cratonic Lamprophyres

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar, Rohit Pandey, Nils Björn Baumann, N. V. Chalapathi Rao, George Mathew, J. Amal Dev, J. K. Tomson   +6 more
wiley   +1 more source

Lithospheric controls on melt production during continental breakup at slow rates of extension: Application to the North Atlantic

, 2009
Rifted margins form from extension and breakup of the continentallithosphere. If this extension is coeval with a region of hotter lithosphere,then it is generally assumed that a volcanic margin would follow.
J. J. Armitage, T. J. Henstock, T. A. Minshull, Hopper, J.R., Henstock, T. J., Henstock, T.J., Minshull, T.A., J. R. Hopper, Minshull, T. A., Hopper, J. R., Armitage, J.J., Armitage, J. J.   +11 more
core   +1 more source

Intrusive Magmatism, Plate Stresses, and the Cause of Orthogonal Versus Oblique Spreading Mid‐Ocean Ridges

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The origin of orthogonally spreading ridge segments separated by oceanic transform faults, versus obliquely spreading ridge segments without transform faults (TFs), is a long‐standing enigma of plate tectonics. We address this problem using three‐dimensional (3D) geodynamic models that simulate axial magmatic intrusions along two ridge ...
Garrett Ito, Jana Schierjott, Mark D. Behn, Xiaochuan Tian, Boris J. P. Kaus, Anton A. Popov   +5 more
wiley   +1 more source

Rheological control of Wadati-Benioff zone seismicity

, 1988
Intermediate and deep focus earthquakes in Wadati-Benioff zones are thought to occur in the cold interiors of downgoing slabs which are significantly stronger than the warmer mantle.
Brodholt, J, Stein, S
core  

One-dimensional physical reference models for the upper mantle and transition zone: combining seismic and mineral physics constraints

One-dimensional seismic reference models are known to be a nonunique solution to global seismic data, hampering an interpretation in terms of physical structure. Here we test the compatibility of the simplest hypothesis of a mantle convecting as a whole,
Giardini, D., Deuss, A., Cammarano, F., Goes, S.   +3 more
core   +1 more source

Middle Cretaceous Andean‐Type Arc Evolution in the Sanandaj–Sirjan Zone (Shalair Valley), Iraq: New Geochronological and Geochemical Constraints

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The middle Cretaceous granitoid plutons of the Shalair Valley, situated in northeastern Iraq, constitute a principal magmatic component of the Sanandaj–Sirjan Zone within the northwestern segment of the Zagros Orogenic Belt. Among these plutons, the equigranular Aulan body (AG) and the porphyritic Laladar body (LG) were crystallized at 111.0 ± 
Imad Kadhim Abdulzahra, Yoshihiro Asahara, Yousif Mohammad, Ayten Hadi   +3 more
wiley   +1 more source

Rift Development, Tectonic Forcings, and Magmatic Feedbacks at Santorini and Kolumbo Volcanoes Constrained by Scientific Drilling and Core‐Seismic Integration

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Volcanism in continental rifts, rifted volcanic arcs, and back‐arc basins is fundamentally coupled with crustal extension. However, the precise geometry and timing of the fault systems that facilitate magma transport and accommodate extension remain poorly constrained.
Jonas Preine, Christian Hübscher, Tim Druitt, Matthias Hartge, Abigail Metcalfe, Steffen Kutterolf, Katharina Pank, Jens Karstens, Paraskevi Nomikou, Masako Tominaga, Emilie Hooft, Beck Hufstetler, Kaisa Autumn, Gareth Crutchley, Maria B. Jover, Christian Berndt, Thomas A. Ronge, IODP Expedition 398 Scientists   +17 more
wiley   +1 more source