摘要
Carbonate burial dissolution in nature is water-rock interaction under certain of temperature and pressure.By analyzing the Gibbs free energy (ΔG) of calcite and dolomite dissolution reaction,this paper pointed out that ΔG initially decreased and then increased with temperature increasing gradually at 25~200 ℃.The dissolution mostly occurred as temperature equaling to 115~140 ℃.At the same burial depth,dolomite is dissolved more easily than calcite.In addition,the ΔG also decreased firstly and then increased,followed by reaching to minimum at the depth of 4 300~5 000 m.