When considering soils in the context of climate regulation, thoughts most often turn to soil organic carbon (SOC) stocks. However, over geologic time scales, a large part of the earth's C cycle is controlled by the weathering of silicate minerals and carbonates, as well as the formation of pedogenic carbonates. This is the role of mineralogy in the earth's inorganic C cycle.
Heckman, Katherine A.; Rasmussen, Craig. 2018. Role of Mineralogy and Climate in the Soil Carbon Cycle. Chapter 4. In: Horwath, William R.; Kuzyakov, Yakov, eds. Climate change impacts on soil processes and ecosystem properties. Elsevier B.V: 93-110. doi:10.1016/B978-0-444-63865-6.00004-1.