Calcareous Nannofossils in Surface Sediments of the Central and Northern Parts of the South China Sea
Calcareous Nannofossils in Surface Sediments of the Central and Northern Parts of the South China Sea
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DOI：
10.1144/jm.11.2.167
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发表时间：
1992-12
影响因子：
2
通讯作者：
C. Xinrong
中科院分区：
文献类型：
--
作者：
C. Xinrong
研究了南海北部和中部表层沉积物中钙质纳米化石的分类组成和数量分布，分别取自河口、陆架、陆坡和深水盆地的146个样品。本文报道了该地区纳米化石的分布格局，包括纳米化石丰度、种类、组合和标本大小。丰度从陆架向斜坡增加，从斜坡下部向深海平原减少。以赫胥黎Emiliania huxleyi、Gephyrocapsa oceanica和Florisphaera profunda为主。生态方面，水温和营养物质的输入影响了纳米化石的分布，而陆源物质的稀释作用和深海碳酸盐的溶解作用影响了样品的沉积学特征。南海纳米化石组合的组成使其在纳米浮游生物的生物地理区划中可归入北太平洋的中心地带。
Taxonomic composition and quantitative distribution of calcareous nannofossils in the nothern and central parts of the South China Sea were studied in 146 samples of surface sediments taken from estuary, continental shelf, continental slope and deep-water basin. This paper reports distribution patterns of nannofossils in the area, including nannofossil abundance, species, assemblages and specimen size. Abundance increases from shelf to slope, with a decrease from the lower part of the slope towards the abyssal plain. The assemblages are dominated by Emiliania huxleyi, Gephyrocapsa oceanica and Florisphaera profunda. Ecologically the effects of water temperature, and nutrient inputs can be detected in the distribution of nannofossils, while dilution by terrigenous materials and deep sea carbonate dissolution influence the sedimentological aspect of the samples. The composition of the South China Sea nannofossil assemblage enables it to be grouped with the central zone of the North Pacific in biogeographic zonations of nannoplankton.