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评价了不同结构组分类别岩石中白云石晶体的有序度 ,并通过研究在悬浮分散体系中具有不同有序度的白云石晶体去白云石化反应的动力学行为 ,建立了白云石有序度与白云石去白云石化反应活性之间的关系。结果表明 ,泥晶白云岩中白云石晶体的有序度最低 ;白云质泥晶灰岩、泥质条带白云质泥晶灰岩、白云质粉屑砂屑泥晶灰岩及白云质亮晶鲕粒灰岩中的白云石晶体的有序度次之 ;豹斑白云质泥晶灰岩、粉晶以上晶粒白云岩中的白云石为近完全有序或完全有序。有序度低的白云石晶体去白云石化反应的扩散活化能、界面化学反应活化能和晶体成核与生长活化能也低 ,低有序度的白云石具有高的反应性。随着体系温度的升高 ,白云石晶体有序度对去白云石化反应的影响趋于减小 ,不同有序度白云石的去白云石化程度趋于相同。
The orderliness of dolomite crystals in different structural component rocks was evaluated. By studying the kinetic behavior of dolomite crystals with different degrees of ordering in the suspension dispersion system, the dolomite orderliness Relationship between the dolomitization and dolomitization reactivity. The results show that dolomite crystals in the dolomite dolomite have the lowest degree of order; dolomitic dolomitic limestone, dolomitic dolomitic dolomitic limestone, dolomitic dolomitic dolomitic dolomite and dolomitic dolomite Oolite limestone dolomite crystal order second; leopard plagioclase dolomitic limestone, dolomite above the crystalline dolomite dolomite is nearly completely ordered or fully ordered. The low activation energy of dolomite crystals with low degree of order is low, and the activation energy of interfacial chemical reaction and nucleation and growth of crystal are also low. Dolomite with low degree of order has high reactivity. As the temperature of the system increased, the influence of dolomite crystal ordering degree on the dolomitization reaction tended to decrease, and the degree of dolomitization tended to be the same for dolomites of different ordorities.