TY - JOUR
AU - Olson, P
AB -  The study of the elastic and compositional structure of the mantle has had a long history (e.g. Adams & Williamson 1925, Jeffreys 1 939, Birch 1952). But the notion of a mantle everywhere in motion is much more recent. With the emergence of plate-tectonic theory in the late 1 960s, the continual motion of the surface plates was seen to imply that the mantle was convecting at depth. This in turn provided an essential connection between the structural properties of the mantle and its internal motions. Emphasis in research gradually shifted from the earlier question of whether the mantle was convecting at all (e.g. Urey 1 952) to the characterization of convective style. More than 20 years of post-plate-tectonic Earth sciences has seen the development of two basic models for mantle convection: one in which the 477 0084-6597/88/05 15-0477$02.00 SILVER, CARLSON & OLSON scale of convection involves the whole mantle, and the other in which the upper mantle and lower mantle are convecting separately. The intensity of the debate on this subject has been fueled not only by the geodynamic question of convective style, but also by the closely coupled question of whether the Earth's mantle is chemically 
TI - Deep Slabs, Geochemical Heterogeneity, and the Large-Scale Structure of Mantle Convection: Investigation of an Enduring Paradox
JF - Annual Review of Earth and Planetary Sciences
DO - 10.1146/annurev.ea.16.050188.002401
DA - 1988-05-01
UR - https://www.deepdyve.com/lp/annual-reviews/deep-slabs-geochemical-heterogeneity-and-the-large-scale-structure-of-7ym0Gurm1B
SP - 477
EP - 541
VL - 16
IS - 1
DP - DeepDyve
ER -