论文部分内容阅读
首次应用有机地球化学方法,对我国南沙永暑礁泻湖和东海大陆架沉降颗粒物质进行了分析和研究.结果表明两地区沉降颗粒有机质在达到距海底5m以前,接近一半被消耗,消耗程度是永暑礁泻湖大于东海大陆架.烃类和脂肪酸分布指示了两地区沉降颗粒有机质来源存在着较小的差异,但是主要来自海洋浮游生物.沉降颗粒有机质的生物和生物化学强烈改造也被认识了,其强度是永暑礁泻湖大于东海大陆架.同时发现C_(25)HBI二烯化合物的存在与硅藻种属分布有关.
For the first time, using organic geochemical methods, the sedimentation particulate matter in the Yongzhai reef lagoon in the Nansha and the continental shelf in the East China Sea were analyzed and studied. The results show that the sediment particle organic matter in the two areas is nearly half consumed until it reaches 5m away from the seafloor, Reef lagoons are larger than the continental shelf in the East China Sea. The distribution of hydrocarbons and fatty acids indicates that there is a small but significant difference in the source of organic matter from the sediments in the two areas but mainly from marine plankton. The biological and biochemical reworking of sediment-derived organic matter is also known, and its intensity Is that the Yongshuijiang Lagoon is larger than the continental shelf of the East China Sea, and the existence of C 25 HBI dienic compounds is found to be related to the distribution of diatoms.