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全新世长江三角洲地区砂体的特征和分布

, PP. 252-268

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Abstract:

砂体是三角洲的重要沉积单元,它构成三角洲的骨架,决定三角洲的形态,反映三角洲的演变过程,是认识三角洲的关键.砂体的矿物组分能为推断三角洲的物质来源提供重要线索,而其内部特征则是判断沉积环境最灵敏、最可靠的因素.三角洲砂体的上覆和下伏层及其与砂体的接触关系,有助于辩认海进海退和沉积盆地发育历史.此外,三角洲砂体紧靠富含有机质的泥质沉积,是石油和天然气储集的良好场所,是勘探的主要目标.因此,研究三角洲砂体不仅具有理论意义,而且能为沉积矿产资源的勘探提供有价值的资料.

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