Here we investigate the creation of primordial TTG-like continental crust using self-consistent numerical models of global thermochemical convection associated with magmatic processes. We show that the volcanism-dominated heat-pipe tectonics model results in cold crustal geotherms and is not able to produce Earth-like primordial continental crust. In contrast, the Plutonic squishy lid tectonics regime dominated by intrusive magmatism results in hotter crustal geotherms and is capable of reproducing the observed proportions of various TTG rocks.
Modelling continental crust formation on Archean Earth
by
Gregor Golabek
From Bayerisches Geoinstitut, University of Bayreuth, Germany
Published Apr. 26, 2018 10:44 AM
- Last modified May 16, 2018 10:58 AM