| 摘要: |
| 笔者在对华北地区中寒武统鲕滩碳酸盐建造露头层序地层学研究工作中首次识别出层序中最基本的地层单元——米级旋回层序,它是露头层序分析最基本的工作单元。本文总结概括出不同体系域内米级旋回层序类型和特征。这些米级旋回层序在垂向上叠加构成高级(五级、四级、三级)旋回层序时表现出周期性和规律性。这种不同级次的旋回层序的形成受不同动力成因引起的具不同周期和频率复合海平面变化的控制。米级旋回层序的识别与复合海平面变化的研究得出中寒武世鲕滩层序的形成经历了若干次周期性的淹没—间断—均衡堆积—加积进积事件,这为盆地充填史的恢复提供了新途径。 |
| 关键词: 中寒武统|米级旋回层序|复合海平面变化|间断加深变浅旋回层序 |
| DOI： |
| 附件 |
| 投稿时间：1995-06-05 |
| 基金项目: |
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| METER-SCALE CYCLIC SEQUENCES AND COMPOSITE SEA-LEVEL CHANGES ON THE NORTH CHINA PLATFORM DURING MIDDLE CAMBRIAN TIME |
| Chen Rongkun |
| (Institute of Geology, China National Bureau of Building Materials) |
| Abstract: |
| The basic stratigraphic units-meter-scale cyclic sequences and their types have been distinguished in the Middle Cambrian oolitic shoal cai-bonate sequences in North China. The meter-scale cyclic sequences are also the basic research units of outcrop sequence stratigraphy. The present paper gives a detailed description of the meter-scale sequence types and features in different systems tracts. The regular stacking patterns of the cyclic sequences in vertical sections which consist of high-order (5th-,4th- and 3rd-order) cyclic sequences are controlled by the composite sea-level changes. The formation of oolitic shoal sequences have experienced several periodic events of drowning,interruption,isostatic accumulation,aggradation and progradation,thus providing a Useful approach to the reconstruction of the basin filling history. |
| Key words: Middle Cambrian|meter-scale cyclic sequence|composite sea-level change|punctuated aggradational cyclic sequence |
