摘要
根据2002年5—6月南沙群岛海域调查时采集的表层沉积物样品,分析了磷的含量并把磷分为总磷(PT)、无机磷(PIN)、有机磷(POR)、非磷灰石结合态磷(PNAI)、磷灰石结合态磷(PAI)5种赋存形态。利用EPM-810Q电子探针测试沉积物的化学成分,讨论了沉积物中磷的形态和分布以及沉积物的地球化学特征与环境的意义。结果表明,调查海区表层沉积物中磷灰石结合态磷与无机磷的含量变化主要受控于生物活动,它们具有同源关系,同属可被生物利用而再次进入生物地球化学循环的磷。沉积物中的总磷和有机磷与FeO显著相关。沉积物中磷灰石结合态磷与CaO显著相关,它的来源和输入方式受控于水体中碎屑颗粒沉积作用的影响。
Samples of surface sediments in the Nansha Islands sea area were collected in May and June, 2002. The chemical components were determined with EPM-810Q electron probe. Five forms, including total phosphorus (P_ T ), inorganic phosphorus (P_ IN ), organic phosphorus (P_ OR ), non-apatite combined phosphorus (P_ NAI ) and apatite combined phosphorus (P_ AI ), were divided. The results showed that the contents of P_ AI and P_ IN , which can mostly return to the biogeochemical phosphorus cycle through biological utilization, were mainly controlled by biological action; the variations of P_ T and P_ OR contents correlated with that of FeO; P_ AI was combined with Ca and correlated with CaO; and precipitation of detrital particles influenced the process of P_ AI entering sediments. The forms and distributions of phosphorus in sediments and the environmental effect of its geochemical characteristics were also discussed.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2005年第3期31-37,共7页
Journal of Tropical Oceanography
基金
国家重点野外台站(试点)科学研究课题
"十五"国家科技专项(2003DEA6N041)
关键词
沉积物
磷
形态
分布
南沙群岛海域
sediment
phosphorus
form
distribution
Nansha Islands sea area
