There are numerous motivations for studying the rates and mechanisms of olivine and pyroxene dissolution. The weathering of these minerals are major contributors of Mg, Fe, and Ca to soils and surface waters. In soils, these metals are essential nutrients used by plant communities (Marschner, 1995). The presence of Mg, Fe, and Ca in surficial waters provokes carbonate mineral precipation, which is linked to atmospheric CO2 content and climate through the carbon cycle (Berner et al., 1983; Brady, 1991; Brady and Carroll, 1994; Berner, 1995; Gislason et al., 1996). The variation of forsterite and enstatite dissolution rates with solution composition and temperature, therefore, provides clues towards the effect of environmental changes on global climate. The dissolution of olivines and pyroxenes are also important buffers controlling surface water pH (Dreyer, 1988; Drever and Clow, 1995).
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- A Comparison of Forsterite and Enstatite Dissolution Rates and Mechanisms
Eric H. Oelkers
- Springer Netherlands
- Chapter 12