Evolution of Sedimentary Environment and Provenance in Qiongdongnan Basin in the Northern South China Sea

• 责任者：Shao Lei (State Key Laboratory of Marine Geology ; Tongji University ; Shanghai 200092 ; China) ; Li Ang
• 刊名：Acta Petrolei Sinica
• 出版年：2010
• 卷期：31(4)
• 关键词：烃源岩 ; source rocks ; 沉积环境 ; sedimentary environment ; 储集层 ; reservoirs ; 琼东南盆地 ; Qiongdongnan Basin
• 页码：p.548-552
• 图表：5 illus., 16 refs.
• 分类号：1003
• issnNo：ISSN0253-2697
• isbnNo：CN11-2128/TE

The sedimentary environment and provenance characteristics in the Qiongdongnan Basin during the Oligocene and Miocene periods were analyzed using geochemical and paleoecological methods. The results indicate that, during the Early Oligocene, the basin was prevailed by freshwater to littoral environments for the deposition of section 3 of the Yacheng Formation, then altered to sea-land transitional conditions with sea water deepening gradually for section 2, and finally to gulf to outer shelf environments for section 1 of the Yacheng Formation.