Iron speciation and magnetic susceptibility in bottom sediments of the Black Sea, Core SMG91-903

12 cores of Late Pleistocene - Holocene deposits were studied. They were collected by gravity cores on the continental slope and in the deep-water part of the Black Sea within the Adler-Tuapse polygon. In four of them in New Euxinian deposits at the base of a packet of hydrotroilite laminae paleomagnetic anomalies likely resulting from the Gothenburg magnetic excursion occur. Comparison with results of similar studies in the western Black Sea, where the Gothenburg magnetic excursion was previously found, let to validate stratigraphic synchronism of the hydrotroilite horizon in the eastern and western parts of the Black Sea and to confirm the authors' views about peculiarities of paleogeographical development of the Black Sea basin in the Late Pleistocene - Holocene.

本研究针对12根晚更新世-全新世（Late Pleistocene - Holocene）沉积岩心展开分析，所有岩心均通过重力柱样（gravity cores）采集技术获取，采样区域为黑海（Black Sea）阿德列尔-图阿普谢采样区（Adler-Tuapse polygon）的大陆坡（continental slope）与深水区域。其中4根岩心的新埃克辛沉积层（New Euxinian deposits）中，位于水纤铁矿（hydrotroilite）纹层组底部的位置，出现了疑似由哥德堡地磁漂移（Gothenburg magnetic excursion）引发的古地磁异常（paleomagnetic anomalies）。将本次研究结果与黑海西部此前已发现哥德堡地磁漂移的同类研究成果对比，验证了黑海东西部水域水纤铁矿层的地层同步性，并证实了作者关于黑海盆地晚更新世-全新世古地理发育特征的相关学术观点。