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本文首次报道对北黄海沉积物中氮的形态及其早期成岩作用的研究成果。结果表明 ,北黄海沉积物中占主导地位的是细粒度组分 ,其结构和性质直接影响着沉积物中化学元素的形态、含量与分布 ,使自然粒度沉积物中各形态氮的垂向分布与细粒度组分中各形态氮的分布非常相近。在氮的早期成岩过程中 ,粒度也起着非常重要的作用 ,沉积物的粒度越细 ,沉积物中有机氮的分解速率越小 ,即细粒度沉积物中有机氮的分解矿化速率最小 ,易于富集有机氮。对于不同站位的沉积物来说 ,因其沉积速率的差异 ,致使沉积物中各形态氮的埋藏通量有很大差异 ,沉积速率越大 ,沉积物中各形态氮的埋藏通量越大 ,在沉积速率最大的 C4站位 ,各形态氮的埋藏通量最大。
This paper reports for the first time the research results on the form of nitrogen and its early diagenesis in the sediments of the North Yellow Sea. The results show that the dominant component of the North Yellow Sea sediment is the fine-grained component, whose structure and properties directly influence the morphology, content and distribution of chemical elements in the sediments so that the vertical distribution of each form of nitrogen in the sediments The distribution of each form of nitrogen in the fine-grained composition is very similar. In the early diagenesis of nitrogen, the grain size also plays a very important role. The finer the grain size of the sediment, the smaller the decomposition rate of organic nitrogen in sediments, that is, the decomposition and mineralization rate of organic nitrogen in fine-grained sediments is the smallest, Easy to enrich organic nitrogen. For sediments of different stations, the burial fluxes of various forms of nitrogen in sediment are greatly different because of the difference in deposition rate. The larger the deposition rate, the larger the burial flux of each form of nitrogen in sediments At the C4 site with the largest deposition rate, the nitrogen flux in each form is the highest.