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本文对阜宁群碎屑岩类及古老母岩约500多个薄片进行分析鉴定,并从四个方面:即陆源碎屑成份和矿物标型特征;自生矿物、胶结物和杂基;碎屑岩类型;以及沉积物埋藏后的变化等特点,阐述了本区碎屑岩类的基本特征.研究结果表明,阜宁群沉积物是在淡水注入和海水侵进下,即两种水体交互作用下形成的.同时,针对本区沉积物埋藏后的变化,具体说明了对物性条件的影响.最后,对物源问题进行了分析,提出本区具多物源的特点,但突出的主物源区是来自盆地西南缘的广泛分布的变质岩系和花岗岩体。
In this paper, about 500 fragments of Funing Group clastic rocks and ancient mother rocks are analyzed and identified, and from four aspects: terrigenous clastic composition and mineral type characteristics; authigenic minerals, cements and miscellaneous groups; detritus Rock types and the changes of sediments after burial, the basic characteristics of clastic rocks in this area are expounded.The results show that the Funing Group sediments are under the influence of fresh water infiltration and seawater intrusion, that is, the interaction between the two kinds of water body Meanwhile, according to the change of the burial sediments in this area, the influence on the physical conditions is explained in detail.Finally, the author analyzed the source problems and proposed that this area has the characteristics of multiple provenances, but the prominent main objects The source area is widely distributed metamorphic rocks and granite bodies from the southwestern margin of the basin.