| 鄂西地区茅口组重力流沉积特征及古地理意义 |
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| 引用本文： | 万秋,李双应,王松,孔为伦.鄂西地区茅口组重力流沉积特征及古地理意义[J].沉积学报,2011,29(4):704-711. |
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| 作者姓名： | 万秋 李双应 王松 孔为伦 |
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| 作者单位： | 合肥工业大学资源与环境工程学院 合肥 230009 |
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| 基金项目： | 中国石化总公司海相前瞻性课题《中上扬子及邻区古生代古沉积环境演化研究》生物地质与环境地质教育部重点实验室课题(编号:BGEGF200801);国家自然科学基金项目(批准号:40972082);安徽省基金(070415205)联合资助 |
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| 摘 要： | 通过对鄂西地区中二叠统详细的野外剖面测量及沉积微相分析,发现鄂西地区中二叠统茅口组发育重力流沉积,沉积类型多样,发育于碳酸盐岩斜坡沉积环境中,自上而下分为滑塌沉积、碎屑流沉积、颗粒流沉积。滑塌沉积主要发育于湖南慈利江垭剖面,颗粒流与碎屑流发育于湖北长阳资丘剖面。滑塌沉积物主要由杂乱堆积的棱角状—次棱角状砾屑灰岩组成,分...
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| 关 键 词： | 重力流沉积 沉积演化 茅口组 鄂西地区 |
| 收稿时间： | 1900-01-01 |
Gravity Flow Sedimentary Characteristics and Environmental Significance in Maokou Formation,Western Hubei Area |
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| WAN Qiu,LI Shuang-ying,WANG Song,KONG Wei-lun.Gravity Flow Sedimentary Characteristics and Environmental Significance in Maokou Formation,Western Hubei Area[J].Acta Sedimentologica Sinica,2011,29(4):704-711. |
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| Authors: | WAN Qiu LI Shuang-ying WANG Song KONG Wei-lun |
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| Institution: | School of Resources and Environmental Egineering , Hefei University of Technology, Hefei 230009 |
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| Abstract: | By use of strata study on the field outcrops and microfacies analysis indoor, types of gravity flow deposits have been found in Maokou Formation Middle Permian, western Hubei province, which developed in carbonate slope depositional environment, from top to bottom slump deposits, debris flow deposits, particle flow deposits have been regonized, slump deposits developed in the Cili Jiang Ya section, Hunan province, particle flow and debris flow developed in the Ziqiu section Changyang country. Slump sediments is composed of the clutter angular subangular calcirudite, poor sorting, grain supported, short range slump slided off from the platform margin; debris flow deposits formed of the calcirudite, gravel limestone, bioclastic micritic limestone, gravel is slightly alignment and sub angular, sub rounded, gravel gradually reduced from bottom to top; particle flow is composed of the gravel limestone sediments, wackstone with miliolids, which developed 2 to 3 cycles and graded layer and wavy bedding. Gravity flow deposits in the study area controlled by the tectonic evolution, the characteristics of its spatial and temporal distribution of the area in the middle Permian is consistent with platform basin deposition pattern, and it has certain significance for the Permian sedimentary evolution in the study area. |
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| Keywords: | gravity flow deposits sedimentary evolution Maokou Formation western Hubei |
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