| 安徽宁国胡乐地区奥陶系层序地层学初探 |
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| 引用本文： | 宫维莉,毕治国,姜立富,齐敦伦.安徽宁国胡乐地区奥陶系层序地层学初探[J].地层学杂志,2010(3). |
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| 作者姓名： | 宫维莉 毕治国 姜立富 齐敦伦 |
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| 作者单位： | 安徽古生物化石博物馆;安徽省地质勘探局327地质队;安徽省地质调查院; |
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| 基金项目： | 安徽省“宁国市胡乐奥陶纪地层剖面及古生物化石遗迹调查与保护”项目成果 |
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| 摘 要： | 宁国市胡乐镇鸿门—将军岭段新开公路旁奥陶系宁国组出露完好,通过对该段地层进行连续观察和分析研究,发现存在Ⅱ型不整合面、海侵面、最大海泛面等重要的地层界面,以及鲍玛序列、复理石建造等典型的沉积特征。根据海平面变化、地壳沉降和沉积物补给关系,采用基本层序调查方法,将该区奥陶纪地层层序划分为A、B、C、D、E5个层序。其中只有2个(C、E)为完整层序,其余3个(A、B、D)为不完整层序。研究表明,该地区奥陶系为深水盆地沉积,纵向岩性变化小,多数缺失低水位沉积,反映当时海平面升降变化幅度较小,但节奏性的韵律变化仍较明显。
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| 关 键 词： | 层序地层 奥陶系 胡乐地区 宁国 安徽 |
PRELIMINARY STUDY OF THE ORDOVICIAN SEQUENCE STRATIGRAPHY IN THE HULE AREA OF NINGGUO,ANHUI |
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| GONG Wei-li ,BI Zhi-guo ,JIANG Li-fu , QI Dun-lun Anhui Paleontological Museum,Hefei , No Geological Party of Anhui Province, Anhui Institute of Geological Survey.PRELIMINARY STUDY OF THE ORDOVICIAN SEQUENCE STRATIGRAPHY IN THE HULE AREA OF NINGGUO,ANHUI[J].Journal of Stratigraphy,2010(3). |
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| Authors: | GONG Wei-li BI Zhi-guo JIANG Li-fu QI Dun-lun Anhui Paleontological Museum Hefei No Geological Party of Anhui Province Anhui Institute of Geological Survey |
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| Affiliation: | GONG Wei-li~ 1),BI Zhi-guo~ 2),JIANG Li-fu~ 3) , QI Dun-lun~ 2) 1) Anhui Paleontological Museum,Hefei 230001,2) No 327 Geological Party of Anhui Province,3) Anhui Institute of Geological Survey |
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| Abstract: | The Ordovician strata along the provincial highway 323 and near the town Hule are well exposed. There are sedimentary characters induding,Bouma sequences and flysch sedimentation.We also identified type Ⅱ sequence boundaries,transgressive surfaces,and maximum flood surfaces. The Ordovician strata are divided into five third-order sequences (sequence A,B,C,D,E),that reflect sea level change,subsidence,and sediment supply.Both sequence C and E are complete sequences. The sequences A,B and D are incomplete. The Ordovician strata represent sedimentation in deepwater basin and with limited lithologic variation vertically. The lowstand system tract is not typically preserved. These features reflect small-scale sea level oscillation. |
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| Keywords: | sequence stratigraphy Ordovician Hule area Ningguo Anhui |
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