苏北盆地高邮—金湖凹陷古近系阜宁组细粒沉积岩纹层特征与成因*
李维1,2, 朱筱敏1, 段宏亮2, 李鹤永2, 刘世丽2

Characteristics and forming mechanism of laminae fine-grained sedimentary rock of the Paleogene Funing Formation in Gaoyou and Jinhu sags,Subei Basin
Li Wei1,2, Zhu Xiao-Min1, Duan Hong-Liang2, Li He-Yong2, Liu Shi-Li2
苏北盆地高邮—金湖凹陷阜二段厚纹层状构造典型纹层特征 a—Lin1井岩心,2600.95 m,纹层连续、略呈波状;b—图a的普通薄片(单偏光),黏土夹层状断续分布于碳酸盐层系之间,陆屑层状富集,见微型冲刷面,碳酸盐含量67.9%,长英质含量13.2%,黏土及其他矿物含量18.9%;c—Z7井岩心,1913.16 m,纹层整体平直,见小型交错层理;d—图c的普通薄片(单偏光,染色),陆屑层状富集、具正韵律,见生物介壳碎片定向排列,碳酸盐含量31.7%,长英质含量38.2%,黏土及其他矿物含量30.1%;e—W5井,938.9 m,纹层平直连续,岩心破碎;f—图e的普通薄片(单偏光,染色),黏土矿物与泥晶碳酸盐组分垂向含量差异形成纹层,碳酸盐含量18.7%,长英质含量29%,黏土及其他矿物含量52.3%