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Geochemistry of episodic sedimentation in Bizerte Lagoon, northern Tunisia

机译：突尼斯北部比塞大泻湖的偶发沉积地球化学

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摘要

The decrease of the contents of TOC in sediment cores in the Bizerte Lagoon is synchronous with that of carbonates. This is attributed to a dilution phenomenon of the organic fraction by the carbonate component of the sediment in the lagoon. This phenomenon also can be explained by the effect of early diagenesis, resulting in the existence of more condensed products, or by removal of more labile organic fraction and/or by reorganization mechanisms leading to the solu-bilization of organic matter towards deep levels. It appears that the mechanisms controlling the geochemical sedimentation in the lagoon are similar to those observed today, with some occasional characteristics reflecting the impact of episodic phenomenon related to other factors and processes, especially a continental influence on the sediments, rather than marine influences.
机译：在比塞大泻湖，沉积岩芯中TOC的减少与碳酸盐的减少是同步的。这归因于有机部分被泻湖中沉积物的碳酸盐成分稀释的现象。这种现象还可以通过早期成岩作用，导致更多冷凝产物的存在，或通过去除更不稳定的有机部分和/或导致有机物向深层次溶解的重组机制来解释。似乎控制泻湖中地球化学沉积的机理与今天观察到的相似，有些偶然的特征反映了与其他因素和过程有关的突发现象的影响，尤其是对沉积物的大陆性影响，而不是海洋影响。

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