Plate tectonics and the Archean Earth
If we accept that a critical condition for plate tectonics is the creation and maintenance of a
global network of narrow boundaries separating multiple plates, then to argue for plate …
global network of narrow boundaries separating multiple plates, then to argue for plate …
[HTML][HTML] Secular change and the onset of plate tectonics on Earth
The Earth as a planetary system has experienced significant change since its formation c.
4.54 Gyr ago. Some of these changes have been gradual, such as secular cooling of the …
4.54 Gyr ago. Some of these changes have been gradual, such as secular cooling of the …
Deep formation of Earth's earliest continental crust consistent with subduction
About four billion years ago, Earth's outer layer is thought to have been composed mostly of
a 25-to 50-km-thick basaltic crust that differentiated to form the oldest stable continental …
a 25-to 50-km-thick basaltic crust that differentiated to form the oldest stable continental …
[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 …
Formation of Archean (3600–2500 Ma) continental crust in the Dharwar Craton, southern India
The generation, preservation and destruction of continental crust on Earth is of wide interest
in understanding the formation of continents, cratons and supercontinents as well as related …
in understanding the formation of continents, cratons and supercontinents as well as related …
An overview of adakite, tonalite–trondhjemite–granodiorite (TTG), and sanukitoid: relationships and some implications for crustal evolution
Examination of an extensive adakite geochemical database identifies two distinct
compositional groups. One consists of high-SiO2 adakites (HSA) which is considered to …
compositional groups. One consists of high-SiO2 adakites (HSA) which is considered to …
The Neoproterozoic oxygenation event: Environmental perturbations and biogeochemical cycling
LM Och, GA Shields-Zhou - Earth-Science Reviews, 2012 - Elsevier
The oxygen content of the Earth's surface environment is thought to have increased in two
broad steps: the Great Oxygenation Event (GOE) around the Archean–Proterozoic boundary …
broad steps: the Great Oxygenation Event (GOE) around the Archean–Proterozoic boundary …
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 …
The geologic time scale
FM Gradstein, JG Ogg, MD Schmitz, GM Ogg - Boston, USA, 2012 - books.google.com
Construction and assembly of the Geologic Time Scale involves:(a) constructing a relative
(chronostratigraphic) standard scale for key periods in the Earth's rock record;(b) identifying …
(chronostratigraphic) standard scale for key periods in the Earth's rock record;(b) identifying …