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| Sun, Meiqin; Lan, Dongzhao; Cao, Zhimin. |
| A quantitative study was undertaken on diatoms from cores (SA08-34) obtained from the southwestern continental slope of the South China Sea (SCS). A total of 165 diatom species belonging to 45 genera were identified. We constructed a stratigraphic subdivision and correlation according to the characteristics of diatom assemblages together with 14 C dating and carbonate analysis. We also discuss the sedimentary environment in the sea area since the last glacial times. The research shows that the diatom assemblages coincide with interglacial and glacial times, and changes in diatom abundance reflect the instability of the climate in the southern part of the SCS, such that short-term, temperature descending events correlate with the interglacial interval. The... |
| Tipo: Text |
Palavras-chave: Diatoms; Last glacial times; Sedimentary environment; South China Sea. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00497/60853/65095.pdf |
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| Huangh, Yuanhui; Lan, Dongzhao. |
| Core D（21°23′02″N，116°47′13″E, water depth 405 m）was sampled from the upper slope from the northeastern South China Sea (SCS) and applied to analyze the sedimentary environmental change in this sea area since the last glacial stage. The results of grain size analysis, diatom analysis and detrital mineral analysis were well matched. We divided the core D into two layers. The surface sand layer (0 - 2 cm) consisted of residual sediments, which might be originally the sediment in the late Pleistocene and later suffered from being transformed in the post glacial transgression. The lower layer (2 - 130 cm) was quite different from the surface one, which might mainly result from a neritic sedimentary environment in the last glacial stage. Two sedimentary cycles... |
| Tipo: Journal Contribution |
Palavras-chave: Grain size; Diatoms; Sedimentary environments. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/5836 |
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| Sun, Aimei; Li, Chao; Lan, Dongzhao; Zhu, Yue. |
| Thirty species of dinoflagellate cysts in 15 genus are identified from KMZK5 Core samples of recent marine sediment at the Luoyuan Bay mouth, Fujian. All of these dinoflagellate cysts are first recorded in the Luyuan Bay, 12 species of them are not distributing in the near sea area such as Sansha Bay and Minjiang estuary, including 6 kinds of toxic species, such as Alexandrium affine，A. minutum, A. tamarense, Gonyaulax spinifera, Gymnodinium catenatum and Scrippsiella trochoidea. The abundance and vertical distribution characterestics of the main and the toxic dinoflgellate cysts are also studied in the paper. |
| Tipo: Journal Contribution |
Palavras-chave: Vertical distribution; Toxicity; Dinoflagellates. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/5837 |
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