Petrographic analysis and elemental geochemical testing were conducted on the dolostones of Gaoyuzhuang Formation in Beipiao area, Liaoning Province. Through petrographic and sequence stratigraphic analyses, eleven sedimentary cycles were identified within a 24-meter-thick stratigraphic section. It was found that the vertical fluctuations in magnesium isotope compositions of the dolostones broadly correspond to the subdivision of parasequences. This indicates that the thick-bedded dolostones of Gaoyuzhuang Formation in Beipiao area were formed by the cumulative superimposition of dolomitization processes occurring during different episodes (cycles). These results validate previous hypotheses regarding the genesis of thick Cambrian dolostone successions. Furthermore, the findings demonstrate that the genetic hypothesis that thick dolostones form via the progressive superimposition of multiple dolomitization events is also applicable to Precambrian dolostones. 

对辽宁北票地区高于庄组白云岩展开岩石学分析和元素地球化学测试, 通过岩石学和层序地层学分析, 在厚度为24 m的地层剖面中识别出11个沉积旋回, 发现白云岩镁同位素组成在纵向上的波动与准层序划分基本上契合, 表明北票地区高于庄组厚层白云岩是不同期次(旋回)白云石化过程持续叠加形成的, 验证了前人关于寒武系厚层白云岩成因的假说。研究结果表明, 不同期次白云石化持续叠加的厚层白云岩成因假说同样适用于前寒武纪的厚层白云岩。