The Permian-Triassic boundary sections in northern Vietnam (Nhi Tao and Lung Cam sections): Carbon-isotope excursion and elemental variations indicate major anoxic event
發佈日期：2016-09-22
- 標題
- The Permian-Triassic boundary sections in northern Vietnam (Nhi Tao and Lung Cam sections): Carbon-isotope excursion and elemental variations indicate major anoxic event
- 作者
- Trinh Hai Son, Christian Koeberl, Nguyen Linh Ngoc, Dang Tran Huyen
- 文件屬性
- 國外期刊
- 知識分類
- 基礎研究
- 出版年
- 2007
- 刊名
- Palaeoworld
- 關鍵字
- Permo-Triassic boundary; Vietnam; Mass extinction; Nhi Tao; Lung Cam; Isotope stratigraphy
- 點閱數
- 3099
摘要
Two Permian-Triassic boundary sections (Lung Cam and Nhi Tao) in shallow marine carbonates from northern Vietnam, near the border between Vietnam and China, were studied for major and trace elemental variations as well as carbon and oxygen isotopic compositions. At the Nhi Tao section, we observe a continuous transition from Late Permian limestones, siliceous limestones and microbial limestones (Dong Dang Formation) to Early Triassic limestones and dolomitic limestones (Hong Ngai Formation). At the Lung Cam section, a thin layer of shale (the uppermost part of the Dong Dang Formation-Late Permian) separates carbonate layers of the Dong Dang Formation (Late Permian) from those of the Hong Ngai Formation (Early Triassic).