| 摘要: |
| 在1:25万区域地质调查基础上,通过对宿松-东至地区南华纪-志留纪地层露头剖面研究,对其相应的沉积环境、沉积相进行了分析,并根据生物地层、岩石地层和年代地层等成果,将南华纪-志留纪地层划分为1个一级层序,5个二级层序和15个三级层序组。一级和二级层序在沉积相序上总的趋势表现为浅※深※浅的变化,且与海平面变化曲线相吻合;三级层序组海平面上升和下降往往受构造运动、海平面变化、冰川事件影响。 |
| 关键词: 层序地层 南华系—志留系 皖西南 |
| DOI： |
| 附件 |
| 投稿时间：2002-11-19 |
| 基金项目:国土资源大调查项目——1∶25万太湖幅区域地质调查(编号:0100134102 |
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| Sequence stratigraphy of the Nanhuan-Silurian strata in Southwest Anhui |
| WU Yao-dong, JIANG Lai-li, CHU Dong-ru, Wu Wei-ping, WU Hai-quan, WANG De-hua |
| (Anhui Institute of Geological Survey, Hefei 230001, Anhui, China) |
| Abstract: |
| The stratigraphic sections of the Nanhuan-Silurian stratigraphic outcrops and their sedimentary environments and facies in the Susong-Dongzhizone, Anhui are discussed on the basis of the 1:250000 regional geological survey. The Nanhuan-Silurian strata may be divided into one first-order sequence, five second-order sequences and fifteen third-order sequence sets. The former two of sequence orders exhibit an overall shallowing-deepening-shallowing trend up-section, which is in accordance with sea-level curves. The sea-level fluctuations within the last ones are commonly constrained by tectonism, sea-level changes and glaciation. |
| Key words: sequence stratigraphy Nanhuan-Silurian Southwest Anhui |
