| 毛乌素沙地砒砂岩成因特征分析 |
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| 引用本文： | 曹石榴1,2,3,' target='_blank'>4. 毛乌素沙地砒砂岩成因特征分析[J]. 中州煤炭, 2018, 0(10): 72-76，81. DOI: 10.19389/j.cnki.1003-0506.2018.10.017 |
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| 作者姓名： | 曹石榴1 2 3 ' target='_blank'>4 |
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| 作者单位： | （1.陕西省土地工程建设集团有限责任公司，陕西 西安 710075； 2.陕西地建土地工程技术研究院有限责任公司，陕西 西安 710075；3.国土资源部退化及未利用土地整治工程重点实验室，陕西 西安 710075； 4.陕西省土地工程技术研究中心，陕西 西安 710075） |
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| 摘 要： | 分布于鄂尔多斯盆地东南缘毛乌素沙地的砒砂岩，是形成于古生代的二叠纪、中生代的三叠纪、侏罗纪以及白垩纪的厚层砂岩、砂页岩以及泥质砂岩组成的岩石互层，主要岩性为陆相碎屑岩。砒砂岩具有无水时坚硬，遇水如软泥、极易被水蚀、风蚀的特性，实验发现其渗透系数为5.2×10-3 mm/s，渗透性较好，塑性指数Ip为9.40，较大，表明亲水性较好；从砒砂岩所组成的矿物成分来看，石英是主要的岩石成分，SiO2含量高，因此砒砂岩成分成熟度高、结构成熟度低，外观表现在胶结程度差、结构强度低。另外，通过分析古生代、中生代各个地层砂岩岩相特征、组成特征、沉积演化特征来还原砒砂岩不同形成时期的沉积环境，以解释不同厚层砒砂岩的形成原因。
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| 关 键 词： | 砒砂岩 毛乌素沙地 沉积环境 岩石学特性 成因 |
Analysis of cause characteristics of Pisha-sandstone in Mu US Desert |
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| Cao Shiliu1,2,3,' target='_blank'>4. Analysis of cause characteristics of Pisha-sandstone in Mu US Desert[J]. Zhongzhou Coal, 2018, 0(10): 72-76，81. DOI: 10.19389/j.cnki.1003-0506.2018.10.017 |
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| Authors: | Cao Shiliu1 2 3 ' target='_blank'>4 |
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| Affiliation: | （1.Shaanxi Provincial Land Engineering Construction Group Co.，Ltd.，Xi′an 710075，China； 2.Institute of Land Engineering and Technology，Shaanxi Provincial Land Engineering Construction Group Co.，Ltd.，Xi′an 710075，China； 3.Key Laboratory of Degraded and Unused Land Consolidation Engineering，the Ministry of Land and Resources of China，Xi′an 710075，China） |
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| Abstract: | The Pisha-sandstone，located in the southeastern margin of the Ordos Basin，which is the thick sandstone，sand shale and argillaceous sandstone interbedded rocks of Paleozoic Permian Triassic and Jurassic Cretaceous Mesozoic，mainly composed of continental clastic rock.The study found that when the hard Pisha-sandstone are anhydrous water，such as sludge，vulnerable to erosion characteristics is due to its good permeability，high plasticity index，good hydrophilicity.From the micro perspective，the rock composition has mainly the quartz that due to its simple structure，low degree of cementation，poor construction strength.In addition，through the analysis of Pisha-sandstone lithic facies characteristics，composition，characteristics of sedimentary evolution in the various strata of Paleozoic and Mesozoic，to restore Pisha-sandstone formed in different sedimentary environment during the period，in order to explain the causes of the different thick layer of Pisha-sandstone. |
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| Keywords: | Pisha-sandstone Mu US Desert sedimentary environment petrological characteristics cause |
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