Earth's heterogeneous mantle: A product of convection-driven interaction between crust and mantle
A Stracke - Chemical Geology, 2012 - Elsevier
Ubiquitous heterogeneity in the Earth's mantle has been documented by numerous
chemical and isotopic analyses of oceanic basalts. Despite the ever-increasing amount of …
chemical and isotopic analyses of oceanic basalts. Despite the ever-increasing amount of …
Multi-stage crustal growth and Neoarchean geodynamics in the Eastern Dharwar Craton, southern India
Abstract The Dharwar Craton is a composite Archean cratonic collage that preserves
important records of crustal evolution on the early Earth. Here we present results from a …
important records of crustal evolution on the early Earth. Here we present results from a …
[HTML][HTML] Stagnant lids and mantle overturns: Implications for Archaean tectonics, magmagenesis, crustal growth, mantle evolution, and the start of plate tectonics
JH Bédard - Geoscience Frontiers, 2018 - Elsevier
The lower plate is the dominant agent in modern convergent margins characterized by
active subduction, as negatively buoyant oceanic lithosphere sinks into the asthenosphere …
active subduction, as negatively buoyant oceanic lithosphere sinks into the asthenosphere …
Zircon U-Pb geochronology links the end-Triassic extinction with the Central Atlantic Magmatic Province
The end-Triassic extinction is characterized by major losses in both terrestrial and marine
diversity, setting the stage for dinosaurs to dominate Earth for the next 136 million years …
diversity, setting the stage for dinosaurs to dominate Earth for the next 136 million years …
Partial melting of lower crust at 10–15 kbar: constraints on adakite and TTG formation
Q Qian, J Hermann - Contributions to Mineralogy and Petrology, 2013 - Springer
The pressure–temperature (P–T) conditions for producing adakite/tonalite–trondhjemite–
granodiorite (TTG) magmas from lower crust compositions are still open to debate. We have …
granodiorite (TTG) magmas from lower crust compositions are still open to debate. We have …
Trace element signature of subduction-zone fluids, melts and supercritical liquids at 120–180 km depth
Fluids and melts liberated from subducting oceanic crust recycle lithophile elements back
into the mantle wedge, facilitate melting and ultimately lead to prolific subduction-zone arc …
into the mantle wedge, facilitate melting and ultimately lead to prolific subduction-zone arc …
Growth of early continental crust controlled by melting of amphibolite in subduction zones
It is thought that the first continental crust formed by melting of either eclogite or amphibolite,
either at subduction zones or on the underside of thick oceanic crust. However, the observed …
either at subduction zones or on the underside of thick oceanic crust. However, the observed …
A catalytic delamination-driven model for coupled genesis of Archaean crust and sub-continental lithospheric mantle
JH Bédard - Geochimica et cosmochimica acta, 2006 - Elsevier
There is no consensus on the processes responsible for near-coeval formation of Archaean
continental crust (dominantly tonalite–trondhjemite–granodiorite: TTG), greenstone belts …
continental crust (dominantly tonalite–trondhjemite–granodiorite: TTG), greenstone belts …