Thickening model of the continental lithosphere

Imag(in)ing the continental lithosphere

This paper is primarily concerned with seismically imaging details in the mantle at an intermediate scale length between the large scales of regional and global tomography and the small scales of reflection profiles and outcrops. This range is roughly 0.1– 1 kmbab10–10 km, where a is the scale. We consider the implications of several models for mantle evolution in a convecting mantle, and possi...

Marginal stability of thick continental lithosphere

[1] Laboratory and numerical experiments show that when a chemically different layer overlies a hotter but otherwise denser layer, analogous to continental mantle lithosphere over asthenosphere, convective stability depends strongly on both the critical Rayleigh number and the buoyancy number, B, of the lithosphere-like layer. Sufficient cooling at low buoyancy number results in an oscillatory ...

Magmatic expressions of continental lithosphere removal

Gravitational lithosphere removal in continental interior has been inferred from various observations, including anomalous surface deflections and magmatism. We use numerical models and a simplified theoretical analysis to investigate how lithosphere removal can be recognized in the magmatic record. One style of removal is a Rayleigh-Taylor-type instability, where removal occurs through drippin...

Thickening, refertilization, and the deep lithosphere filter in continental arcs: Constraints from major and trace elements and oxygen isotopes

Rupturing Continental Lithosphere in the Gulf of California & Salton Trough

Workshop Reports East African Rift ...........................7 Ultra-Deep Drilling into Arc Crust .. 14 Cascadia Marine Geophysics .... 17 IODP Drilling for SCD Objectives .... 18 From the GeoPRISMS Chair ............... 11 NSF Update .................................... 12 NSF GeoPRISMS Solicitation ............... 13 GeoPRISMS Data Portal Status Report 20 GSOC Highlights .......................