Juvenile Paleoproterozoic crust evolution during the Eburnean orogeny (~2.2-2.0 Ga), western Burkina Faso
2011
Abstrakt
A new geotectonic model of juvenile crust formation and evolution during the Eburnean orogeny (~2.2-2.0 Ga). Three principal deformation events (D1-D3) can be distinguished in the study area.
Deformation mechanism changed from D1 pure shear dominated compression, to D2 simple shear dominated transpression. Regional scale system geometry controlled by coaxial shortening of stiffer volcanic units and coeval magma input.
The last D3 N-S compression is either late-Eburnean or perhaps even Pan-African.