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Distribution and Composition of Sedimentary Matter in the Northeast Black Sea

机译：东北黑海沉积物的分布和组成

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Deep-sea buoy-based stations with sediment traps were deployed for the first time in the northeast Black Sea. One sediment trap with 12 cones was used for long-term studies at a depth of 1800 m below the sea surface at a site with coordinates of 44 deg15.2' N and 37 deg 43.6' E and a sea depth of 1900 m. The trap collected sedimentary matter continuously from January to May 1998 with cones changed every 15 days. Other stations with sediment traps for short-term studies (September-October 1999) were located on the shelf (station 2; coordinates: 44 deg 16' N and 38 deg 37' E; deployment depth 45 m; sea depth 50 m) and above the bottom of a canyon It is shown that the vertical particle fluxes are controlled by the seasonal changes in primary production and the dynamics of the terrigenous matter input. T he highest total particle fluxes are characteristic of the spring season as a result of the phytoplankton bloom. The maximum coccolith bloom corresponds to April-May, whereas the diatom bloom begins in March. In the winter and autumn, the terrigenous matter polays a dominant role in the total fluxes whose dynamics depend on storms and river matter input. Suspended matter differs fromthe surface shelf sediments in its finer-grained composition and higher content of clay minerals and amorphous silica. This material is transported by mudflows along deep-sea canyons downward to the foot of the slope. In winter, this process is periodically intensified, activating the sediment transport from the shelf toward the deep-water areas of the sea.
机译：带有沉积物捕集器的深海浮标站首次在东北黑海部署。在海平面以下1800 m的深度处，使用一个带有12个锥体的沉淀物收集器进行长期研究，该位置的坐标为北纬44度15.2'和东经37度43.6'，海深为1900 m。该捕集器从1998年1月至1998年5月连续收集沉积物，并且每15天更换一次锥体。在架子上还设有其他用于短期研究（1999年9月至10月）的带有沉积物捕集阱的台站（台站2;坐标：北纬44度16'和东经38度37;部署深度45 m;海深50 m）和峡谷底部上方的情况表明，垂直粒子通量受初级生产的季节性变化和陆源物质输入的动力学控制。由于浮游植物的开花，总颗粒通量最高是春季的特征。最高的硬藻石花期对应于四月至五月，而硅藻花期始于三月。在冬季和秋季，陆源物质在总通量中起主导作用，其总通量取决于风暴和河流物质的输入。悬浮物与表层沉积物的不同之处在于其细颗粒的成分以及较高含量的粘土矿物和无定形二氧化硅。这些物质通过泥流沿深海峡谷向下输送到斜坡的底部。在冬季，该过程会定期加剧，从而激活了沉积物从架子向海洋深水区的运输。

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