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沉积岩石学第7章..ppt

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Ⅱ、页理—页岩 Ⅲ、干裂、雨痕、 虫孔、结核 微观构造 Ⅰ、鳞片构造 Ⅱ、毡状构造—纤维状交织分布 Ⅲ、定向构造—片状定向排列 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 第五节 泥质岩的分类与主要类型 一、泥质岩分类 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 二、泥岩主要类型 ①伊利石粘土岩 粘土矿物主要为伊利石,其次有蒙脱石、伊/蒙混层。具鳞片状、毡状构造。 产于各种大陆、海洋的低能环境。地质时代愈老伊利石含量越高。 ②高岭石粘土岩 粘土矿物主要为高岭石。 形成方式有两种: Ⅰ、残积形成—潮湿、酸性介质中,硅酸盐风化残积。 Ⅱ、沉积形成—沼泽、近海、泻湖中化学沉积形成,与煤系地层有关。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. ③蒙脱石粘土岩—斑脱岩 粘土矿物主要为蒙脱石,吸水性强。 形成方式: Ⅰ、残积型—火山喷发物质在碱性介质中水解形成 Ⅱ、沉积型—湖泊、岛弧附近,与火山活动有关。 ④泥岩与页岩 常见有:Ⅰ、钙质、铁质、硅质泥岩与页岩 Ⅱ、碳质页岩与黑色页岩—前者为碳质引 起,后者含有机质与FeS。 Ⅲ、油页岩—干酪根超过10%的页岩 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 斑脱岩薄片 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * 关于砂岩实习课和实习报告的评述 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Q+F+R=100%; F+R=100% (或F/R) Q>95%为石英砂岩 Q<75% F/R>3为长石砂岩 Q<95%,>75% F/R>1,<3为岩屑长石砂岩 F>R为长石石英砂岩 F/R<1,>1/3为长石岩屑砂岩 F<R为岩屑石英砂岩 F/R<1/3为岩屑砂岩 长石石英砂岩 岩屑石英砂岩 石英+燧石+石英岩+硅质岩岩屑 95 75 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 硅质胶结和黏土基质 Evaluation only. Created with Aspose.Slides for .NET 3.5 C
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