冰后期长江三角洲沉积通量的初步研究

来源 :中国科学(D辑:地球科学) | 被引量 : 44次 | 上传用户:chengmoshijing
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在265个长江三角洲钻孔地层资料中识别出了冰后期海侵旋回底界面和(或)最大海侵面,分别记录了它们的埋深值.由此绘制出了长江三角洲冰后期沉积物等厚图及冰后期最大海侵以来的沉积物等厚图,计算了冰后期沉积旋回及其海侵和海退层序的沉积物数量,并且分析了其分布特征.结果表明,长江三角洲在冰后期及其海侵和海退期间的沉积物数量分别为17742.2×108,9791.9×108和 7950.3×108t.其中,下切河谷沉积量超过三角洲两翼,海侵期沉积量大于海退期,南翼沉积量大于北翼,两翼前缘沉积量大于后缘.综合考虑
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