巢北地区二叠系栖霞组碳酸盐岩地球化学特征及其古环境意义  

Geochemistry Characteristics and Palaeo-Environment Significance of Qixia Formation in Chaobei Area

作　　者：何雨旸[1] 赵广涛[1] 赵利[1] 龙晓军[1] 祁奇[1] 徐翠玲[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2014年第5期79-88,共10页Periodical of Ocean University of China

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.

关 键 词：栖霞组 碳酸盐岩 地球化学 古环境 

分 类 号：P595[天文地球—地球化学]