The solubility of corundum in H₂O at high pressure and temperature and its implications for Al mobility in the deep crust and upper mantle

详细信息	查看全文 | 推荐本文 |

• 作者：P. Tropper ; C.E. Manning
• 关键词：Al solubility ; Corundum ; Piston cylinder experiments ; Al mobility ; Fluid– ; rock interaction
• 刊名：Chemical Geology
• 出版年：2007
• 期刊代码：12_00092541
• 类别：ear
• 出版时间：15 May 2007
• 卷：240
• 期：1-2
• 页码：54-60
• 文件大小：488 K

摘要

The solubility of corundum in H₂O was measured at 700–1100 °C and 0.5–2.0 GPa using a piston–cylinder apparatus and weight-loss methods. At 700 °C, 0.5 GPa, Al concentration is 0.41 ± 0.15 millimolal (1σ analytical error). Corundum solubility increases strongly with pressure (P) and temperature (T), reaching 2.57 ± 0.15 millimolal at 700 °C, 2.0 GPa, and 27.3 ± 1.5 millimolal at 1100 °C, 2.0 GPa. The results were fitted with the equation log m_Al = 1.131 + 3827 / T − (2.277 − 7336 / T)logρ_H2O, where m_Al is molality of Al, ρ_H2O is the density of H₂O in g/cm³, and T is in Kelvin. The data indicate that Al can have significant solubility in H₂O during metamorphic and metasomatic processes in the deep crustal and upper mantle.