摘要
高分辨率层序地层学在实际应用中尚存在若干值得注意的问题。理论上要深刻理解基准面概念的涵义,认识到基准面的相对性属性;注意区分地层记录中存在着自旋回和异旋回两种不同成因机制的沉积旋回。在基准面旋回的划分和识别上,原有的短期、中期和长期旋回三级划分方案在定义上过于含糊,易产生歧义,建议以多数学者比较认同的旋回时限进行五级划分为宜。在应用上,以相组合和相序特征为依据划分基准面旋回,避免以粒序特征为凭识别基准面旋回,结合实践提出陆相沉积环境中从冲积平原→深湖相的五级基准面旋回识别模式和实例。
There are still some notable problems left in the application of high resolution sequence stratig-
raphy.Theoretically,we should profoundly understand the implication of the conception of base-level and
have a correct understanding of the base-level’s property of relativity.We should pay close attention to
distinguishing two kinds of sedimentary cycles with different genesis mechanisms of autocyclicity and allo
cyclicity.In the classification of base-level cycles,it seems a little bit vague in the definition of the three
order classification scheme of short,medium and long term cycles.It has been suggested that a five-order
base-level cycle classification scheme based on the cycle duration and accepted by most geologists,should
be adopted.Finally,base-level cycle recognition must be based on the features of facies assemblage and fa
cies order,and avoid to recognizing base-level cycle with graded facies.Combined with practical research
work.the author put forward a recognition model of fifth order base-level cycle in the continental sedimen
tary environment.
出处
《地层学杂志》
CSCD
北大核心
2004年第2期179-184,共6页
Journal of Stratigraphy
基金
石油天然气总公司"九五"重点科技攻关项目资助
关键词
高分辨率
层序地层学
陆相
基准面
自旋回
异旋回
旋回分级
地层划分
high resolution sequence stratigraphy
continental facies
base-level
autocyclicity
allocyclicity
cycle grading
recognition model
