Results 61 to 70 of about 1,202,850 (223)

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

open access: yesGeological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid   +9 more
wiley   +1 more source

Subduction Zone Geodynamics

open access: yes, 2009
Subduction is a major process that plays a first-order role in the dynamics of the Earth. The sinking of cold lithosphere into the mantle is thought by many authors to be the most important source of energy for plates driving forces.
Funiciello, F., Lallemand, Serge
core   +4 more sources

Onset of double subduction controls plate motion reorganisation

open access: yesNature Communications
Face-to-face double subduction systems, in which two oceanic plates subduct toward each other, are essential elements of plate tectonics. Two subduction zones in such systems are typically uneven in age and their spatially and temporally variable ...
Kuidi Zhang, Jie Liao, Taras Gerya
doaj   +1 more source

Rheological control of Wadati-Benioff zone seismicity [PDF]

open access: yes, 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  

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

open access: yesGeological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos   +6 more
wiley   +1 more source

Geodynamic modelling of subduction zones : Subduction zone initiation by polarity reversal and main dynamic controls on the stability of single-sided subduction

open access: yes, 2021
Subduction zones are one of the most widely studied geodynamic settings, representing the primary driver for mantle convection and plate tectonics.
Almeida, Jaime
core  

Miocene to Quaternary Tectonostratigraphic Evolution of the Northern Section of the Burdur‐Fethiye Shear Zone, South‐Western Türkiye

open access: yesGeological Journal, EarlyView.
New zircon ages reveal that lacustrine sedimentation initiated in the Late Miocene (Messinian), revising earlier Pliocene age assignments. The study results support the interpretation of the northern BFSZ as a broad left‐lateral transtensional shear zone rather than a discrete sinistral fault or simple extensional graben array.
İrem Elitez   +3 more
wiley   +1 more source

An introductory review of the thermal structure of subduction zones: III—Comparison between models and observations

open access: yesProgress in Earth and Planetary Science, 2023
The thermal structure of subduction zones is fundamental to our understanding of the physical and chemical processes that occur at active convergent plate margins. These include magma generation and related arc volcanism, shallow and deep seismicity, and
Peter E. van Keken, Cian R. Wilson
doaj   +1 more source

Structure and Propagation of Mesoscale Cyclonic Eddies in the Brazil–Malvinas Confluence

open access: yesInternational Journal of Climatology, EarlyView.
Between 1993 and 2022, 1386 cyclonic eddies were identified in the Brazil–Malvinas Confluence, one of the most energetic regions of the South Atlantic. While most eddies dissipated locally, a smaller number of individuals, more energetic, and longer lived propagated predominantly south‐westward and north‐eastward, driven by topographic constraints and ...
Rafaella Oliveira Santos   +2 more
wiley   +1 more source

DCO-Modelling-of-Deep-Time-Atmospheric-Carbon-Flux-from-Subduction-Zone-Interactions: Plate Models & Minor Edits

open access: yes, 2016
<p>EarthByte DCO-commissioned project, Spatio-temporal modelling of deep time atmospheric carbon flux from subduction zone interactions, specifically addresses this goal by using plate reconstructions and cutting-edge, open-source community ...
Sabin Zahirovic   +7 more
core   +1 more source

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