Results 71 to 80 of about 27,280 (282)
Geological Journal, EarlyView.Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley +1 more source
Earth and Planetary Physics, 2019 The Tibetan Plateau, known as “the roof of the world” and “the third pole of the earth”, is a product of the collision between India and Asia during the last ~50 Ma.
Yu Zou +5 more
doaj +1 more source
The Sensitivity of Joint Inversions of Seismic and Geodynamic Data to Mantle Viscosity
Geochemistry, Geophysics, Geosystems, 2020 Seismic tomography has revealed the existence of large‐scale velocity heterogeneities in the mantle. The interpretation of seismic velocity anomalies in terms of temperature and chemical composition is nonunique.
Chang Lu +6 more
doaj +1 more source
The impact of rheological uncertainty on dynamic topography predictions [PDF]
Solid Earth, 2019 Much effort is being made to extract the dynamic components of the Earth's topography driven by density heterogeneities in the mantle. Seismically mapped density anomalies have been used as an input into mantle convection models to predict the present ...
Ö. F. Bodur, Ö. F. Bodur, P. F. Rey
doaj +1 more source
Coupling thermodynamic mineralogical models and mantle convection [PDF]
, 2007 In this thesis I advance the integration of mineral thermodynamics into convection modeling. I have compiled a thermodynamic model of mantle mineralogy in the five component CFMAS system (CaO-FeO-MgO-Al2O3-SiO2), including mineral phases that occur close
Piazzoni, Antonio Sebastiano
core
Geological Journal, EarlyView.The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang +6 more
wiley +1 more source
Communications Earth & EnvironmentSubduction-induced mantle flow has a considerable geodynamic impact on Earth. It can deflect mantle plumes, transport geochemical signatures and produce upwellings that generate atypical intraplate volcanism.
Vincent Strak +2 more
doaj +1 more source
Geological Journal, EarlyView.Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley +1 more source
Azimuthal anisotropy beneath north central Africa from shear wave splitting analyses
Geochemistry, Geophysics, Geosystems, 2015 This study represents the first multistation investigation of azimuthal anisotropy beneath the interior of north central Africa, including Libya and adjacent regions, using shear wave splitting (SWS) analysis.
Awad A. Lemnifi +6 more
doaj +1 more source
The energetics of melting fertile heterogeneities within the depleted mantle
To explore the consequences of mantle heterogeneity for primary melt production, we develop a mathematical model of energy conservation for an upwelling, melting body of recycled oceanic crust embedded in the depleted upper mantle.
Katz, R. F., Rudge, John F.
core +1 more source