Division of HighResolution Sequence Stratigraphy of Jiufotang Formation Outcrop in Kazuo Basin
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摘要: 在实测106 km剖面和对喀左盆地九佛堂组沉积特征及演化进行详细研究的基础上，依据相序关系，并结合碳酸钙、油页岩的成因意义，将九佛堂组划分了 1个长期基准面旋回和7个中期基准面旋回。在长期基准面旋回内,上升期的中期基准面旋回发育以上升半旋回为主的不完全对称型中期基准面旋回，上升与下降过渡期的中期基准面旋回，则发育近完全对称的中期基准面旋回，下降期的中期基准面旋回，则发育以下降半旋回为主的不完全对称型中期基准面旋回。经过对中期基准面旋回和短期基准面旋回发育特点和形成原因的详细研究，对代表剖面进行了中期基准面旋回对比。Abstract: On the basis of 106 kilometers measured sections and detailed research of sedimentary characteristics and evolution of Jiufotang Formation in Kazuo Basin,according to facies sequence relationship and the genetic significance of Calcium Carbonate and oil shale, Jiufotang Formation are divided into 1 longterm base level cycle and 7 midterm base level cycles. In longterm base level cycle, the midterm base level cycles on the rising period are mainly incomplete symmetry with the majority of uprising semicycle, the one on the transition period from rising to declining developed nearly complete symmetry, the one on the declining period mainly developed incomplete symmetry with the majority of subsiding semicycle. After detailed research of developmental characteristics and forming reason of midterm base level cycles and shortterm baselevel cycles, correlation of midterm base level cycles were carried out on representative profile.
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Key words:
- Jiufotang Formation
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