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根据1980年6月、1981年8月和11月的地球化学调查与实验室分析,进行了以下几方面的探讨:(1)上覆水与间隙水中Fe~(2+)浓度的季节和空间变化;(2)沉积物固相中Fe(Ⅲ)、Fe(Ⅱ)和全Mn的剖面;(3)铁、锰扩散通量和沉积通量的估算与比较。 Fe~(2+)的季节与空间变化反映了铁的早期成岩与沉积物粒度成分以及介质中pH、Eh和溶解氧等因子之间的复杂关系。 通过对Fe、Mn扩散通量与沉积通量的估算和比较,初步评价和描述了本测区铁、锰的地球化学活动性及其在成岩过程中的作用。
According to the geochemical survey and laboratory analysis in June 1980, August and November 1981, the following aspects are discussed: (1) Seasonal and spatial variations of Fe2 + concentration in overlying and interstitial water ; (2) profiles of Fe (Ⅲ), Fe (Ⅱ) and total Mn in the sediment solid phase; and (3) estimation and comparison of diffusion flux and deposition flux of iron and manganese. Seasonal and spatial variations of Fe 2+ reflect the complex relationship between iron diagenesis and sediment grain size and the factors such as pH, Eh and dissolved oxygen in the medium. Based on the estimation and comparison of the flux and deposition flux of Fe and Mn, the geochemical activities of iron and manganese in this area and their roles in diagenesis are preliminarily evaluated and described.