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Extrapolating the Original Positions of Removed Onlap-Offlap Points Using a Piecewise-Constructed Model of Effective Stratal Thickness
Author(s): 
Pages: 614-618
Year: Issue:  4
Journal: ACTA SEDIMENTOLOGICA SINICA

Keyword:  地层超覆剥蚀有效厚度数据拟合与外推巽他陆架;
Abstract: 地层超覆点的迁移是层序地层分析和海平面变化曲线编制的重要依据.受构造抬升、海平面下降或二者共同作用影响,地层超覆点在沉积后常被剥蚀.如何恢复其原始沉积时的位置,至今尚无定量方法提出.基于地层厚度自盆地边缘向盆地中心依次增大,或先增大、后减小的分布特点,采用指数与线性相结合的分段函数模型,利用未剥蚀区地层厚度数据拟合外推恢复原始地层超覆点位置.该方法适用于被动大陆边缘、大型三角洲沉积区及坳陷型盆地,应用于巽他陆架晚新生代地层分析,取得满意效果.
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