Experiments ranging from 2 to 3 GPa and 800 to 1300°C and at 0.15 GPa and 770°C were performed to investigate the stability and mutual solubility of the K2ZrSi3O9 (wadeite) and K2TiSi3O9 cyclosilicates under upper mantle ...
Shaw C.S.J.; Thibault Y.; Edgar A.D.; Lloyd F.E.(1998)
Experiments dissolving orthopyroxene (En93) in a variety of Si-undersaturated alkaline melts at 1 atmosphere and variable f O2 demonstrate that orthopyroxene dissolves to form olivine, Si-rich melt and clinopyroxene. These ...
Sodium-rich metasomatism in the upper levels of the mantle has been modeled by reacting pyrolite with alkali-bearing HâO fluids containing minor COâ and concentrations of NaâO and NaâO + KâO (K/K + Na = 0.1) up to 4.0 g ...