摘要
基于层序地层学的基本原理,研究了基准面上升和下降期间,可容空间的变化规律及其对沉积物的影响。研究认为沉积物对基准面升降的响应过程比较复杂,但还是存在一些普遍性的规律,总结的“不对等性”“植被迟滞性”“位置虚假效应”等规律是下游地区沉积物供给和沉积强度对基准面变化的响应规律。为证实这些规律,分析了湖南龙潭组沉积序列片段,特别是这些片段的岩层叠置关系、沉积物粒径、砂/泥比等对基准面升降的响应规律。分析表明沉积物对基准面的这些响应规律是明显的,且具有普遍性,值得在基准面升降旋回分析中得到重视。运用这些规律进行了实例分析,证实这些规律的总结有利于基准面旋回规律的分析以及最大海泛面、最大海退面等关键点的界定。
Based on the fundamental principles of sequence stratigraphy,the paper has studied during the datum plane rising and falling,accommodation space variation pattern and its impact on sediments.The study has considered that the sedimental response process on datum plane deleveling is rather complex,but still has some universalities,summed“unequivalence”,“vegetation hysteresis”and“position false effect”etc patterns are the downstream areas sediment supply and sedimentary intensity response patterns on datum plane deleveling.To verify these patterns have analyzed Longtan Formation sedimentary sequence segments in Hunan,especially strata superimposed relationship,sediment grain size,and sand/mud ratio in segments response patterns on datum plane deleveling.The analysis has shown that sedimental response patterns on datum plane deleveling are obvious with universality,worth to pay attention to datum plane deleveling cyclic analysis.To use these patterns carried out case analysis,verified the summary of these patterns are propitious to datum cyclic pattern analysis and maximum marine flooding surface,maximum marine regression surface etc key points definition.
作者
刘海波
刘石磊
邵磊森
Liu Haibo;Liu Shilei;Shao Leisen(Hunan Vocational Institute of Technology,Xiangtan,Hunan 411104)
出处
《中国煤炭地质》
2020年第12期27-32,共6页
Coal Geology of China
基金
湖南省自然科学基金项目(2018JJ5033)。
关键词
基准面
可容空间
沉积物
层序
datum plane
accommodation space
sediment
sequence
