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首页> 外文期刊>Oceanology >Vertical Structure of Near-Surface Sediments in the Central Parts of the Yaghan and Scan Basins (Scotia Sea)
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Vertical Structure of Near-Surface Sediments in the Central Parts of the Yaghan and Scan Basins (Scotia Sea)

机译：亚拉罕和扫描盆地中央部分近表面沉积物的垂直结构（苏格兰海）

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摘要

The structure of the sediment sequence of the Scotia Sea is the basis for reconstructing the geological history of the development of its floor in the late Quaternary. One of the most important elements of the floor of the southern Scotia Sea is the Scan Basin, the formation of which played a substantial role in the breakup of the American-Antarctic continental bridge that connected the Bruce and Discovery banks. By now, the main parameters of the sediment sequence in the Scan Basin have been reconstructed, but the literature reflects the lack of data on the upper part of the section. On an observation profile, the Spanish R/V Hesperides, using a TOPAS PS 18/40 high-resolution seismic profiler, distinguished three beds in the central part of the basin. The total mean thickness of the first reflector is 3.7 ms; the second, 2.3 ms; and the third, 1.8 ms. The beds have a relatively consistent thickness and are distinctly traced along the profile. The literature data on the sedimentation parameters make it possible to estimate the total mean deposition time for the first bed of 133 ka; the second, 84 ka; and the third, 64 ka; the total mean sediment accumulation time for all three beds is 281 ka.
机译：斯科罗斯海的沉积物序列的结构是重建其在第四纪后期地板的地质史的基础。南·斯科罗基海底最重要的元素之一是扫描盆地，形成在联系布鲁斯和发现银行的美国南极大陆桥的破裂中发挥了重要作用。到目前为止，已经重建了扫描盆中沉积物序列的主要参数，但文献反映了该部分上部缺少数据。在观察轮廓上，使用Topas PS 18/40高分辨率地震剖面仪的西班牙语R / V耶珀普尔，在盆地的中央部分区分三张床。第一反射器的总平均厚度为3.7ms;第二，2.3毫秒;和第三，1.8毫秒。床具有相对一致的厚度，并且沿着轮廓明显地追踪。沉积参数上的文献数据使得可以估计133 ka的第一床的总平均沉积时间;第二，84 ka;和第三，64 ka;所有三张床的平均沉积物累积时间为281 ka。

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