Possible relationships between mantle convection and deep structure of the lithosphere. Implications for mineral exploration
published: Aug 1, 1996
ArtNo. ESP136000601006, Price: 19.00 €
Some near-vertical structural discontinuities (boundaries), revealed by seismic refraction profiles, penetrate the MOHO discontinuity and extend down into the upper mantle. Some papers have even shown displacements of the MOHO at many places. Geochemical criteria indicate that some of these discontinuities extend down to the base of the lithosphere. If we accept the existence of mantle convection and its role in driving the lithospheric plates, we can imagine convection currents as getting in touch with the "roots" of those structural discontinuities which extend as deep as the base of the lithosphere. This concept is independent of the scale of convection: whether a whole-mantle convection or a two-layer convection or, specifically, sub-lithospheric convection cells, such as those proposed by Stephenson & Beaumont (1980), are involved .