Morphology and post-Chaudian (Late Pleistocene) evolution of the submarine Danube fan complex |
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| Authors: | HK Wong N Panin C Dinu P Georgescu C Rahn |
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| Institution: | Institute of Biogeochemistry and Marine Chemistry, Hamburg University, Bundesstraße 55, 0–20146 Hamburg, Germany;Institute of Geology and Geophysics of Romania, Bucharest, Komania;Faculty of Geology and Geophysics, Bucharest University, Romania |
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| Abstract: | The Danube deep sea fan in the northwestem Black Sea has a lateral dimension of over 150 km and stretches from several hundred metres water depth down to the abyssal plain. Eight seismic sequences have been recognized in the fan complex. Each sequence consists of channel, levee and overbank deposits, as well as mass transport units. The Danube and the Ukrainian rivers have aggraded two surficial channel-levee systems which diverge and decrease in volume downfan. The channels of these systems have a low sinuosity, implying young age, steep gradients and/or limited sediment supply. Significant channel migration occurred in the course of fan development, which could be largely controlled by relative sea-level changes. The six youngest sequences mapped have been correlated to sea-level fluctuations from the post-Chaudian regression to the present day. |
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