摘要
本文系统研究了巢北区下二叠统栖霞组碳酸盐岩的岩相学及地球化学特征,初步推断了栖霞组形成的古环境特征。结果表明,栖霞组主要形成于正常外台地海的浅水环境,沉积期间陆源物质供应较少;期间气候波动较小,海平面相对较高,主要处于贫氧环境中,海侵范围较大,总体上来说经历了一个大的波动式海侵-海退旋回,可分为4个沉积阶段。
The causes of the formation can be used to reveal the palaeo-enviroment of the period, and he petrographic and geochemical signatures of formations can be employed as important indicators. The carbonates of Lower Permian Qixia Formation of Chaobei area were systematically studied in this paper, and the paleoenvironmental of Qixia formation was inferred by them. The results indicates that the Qixia formation were normal marine sediments, and terrigenous was insufficient. During this period, the climate were stable, the extent of transgression was relatively large, and the environment was oxygen-deficient. Overall, it had gone through a huge transgression and regression cycle, with 4 sedimentary stages.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第5期79-88,共10页
Periodical of Ocean University of China
关键词
栖霞组
碳酸盐岩
地球化学
古环境
Qixia formation
limestone
geochemistry
palaeo-enviroment
