Post Profile






The origin of Earths first continents and the onset of plate tectonics

The growth and recycling of continental crust has resulted in the chemical and thermal modification of Earth’s mantle, hydrosphere, atmosphere, and biosphere for ~4.0 b.y. However, knowledge of the protolith that gave rise to the first continents and whether the environment of formation was a subduction zone still remains unknown. Here, tonalite melts are formed in high P - T experiments in which primitive oceanic plateau starting material is used as an analogue for Eoarchean (3.
read more

share

Related Posts


Deep recycling in the Earth faster than thought

Academics / Geology : Geology Times

The recycling of the Earth's crust in volcanoes happens much faster than scientists have previously assumed. Rock of the oceanic crust, which sinks deep into the earth due to the movement of tectonic plates, reemerges through volcan...

Kimberlites and the start of plate tectonics

Academics / Geology : GeoScienceWorld

We want to know when plate tectonics began and will consider any important Earth feature that shows significant temporal evolution. Kimberlites, the primary source of diamonds, are rare igneous features. We analyze their distributio...

Tectonic settings of continental crust formation: Insights from Pb isotopes in feldspar inclusions in zircon

Academics / Geology : GeoScienceWorld

Most crustal rocks derive from preexisting crust, and so the composition of newly generated (juvenile) continental crust, and hence the tectonic settings of its formation, have remained difficult to determine, especially for the fir...

Key new pieces of the HIMU puzzle from olivines and diamond inclusions

Academics : Nature AOP

Mantle melting, which leads to the formation of oceanic and continental crust, together with crust recycling through plate tectonics, are the primary processes that drive the chemical differentiation of the silicate Earth. The prese...

The Origin of the Continents

Biology / Paleontology : The Dragon's Tales

The origin of Earth's first continents and the onset of plate tectonics Authors: Hastie et al Abstract: The growth and recycling of continental crust has resulted in the chemical and thermal modification of Earth's mantle, hydrosphe...

Comments


Copyright © 2016 Regator, LLC