Characteristics of wave-built sedimentary archives in Buor Khaya Bay (71°N/130°E), Siberian Arctic, Russia.
Prograded sequences of beach deposits preserve valuable paleoenvironmental information on the long-term variability of the (wave-) climate forcing driving centennial to millennial coastal evolution. Buor Khaya Bay, NE Siberian Arctic, is located at the transition between the Verkhoyansk mountain ran...
| Main Authors: | , , , , |
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| Format: | Conference Object |
| Language: | unknown |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://epic.awi.de/id/eprint/46244/ https://epic.awi.de/id/eprint/46244/1/NGWM_BuorKhaya-compressed.pdf https://hdl.handle.net/10013/epic.b5f210dd-744b-4af7-b2e4-82e99c480740 |
| Summary: | Prograded sequences of beach deposits preserve valuable paleoenvironmental information on the long-term variability of the (wave-) climate forcing driving centennial to millennial coastal evolution. Buor Khaya Bay, NE Siberian Arctic, is located at the transition between the Verkhoyansk mountain range and the Arctic Ocean and is one of the few places along the Russian arctic coast, where wide beach-ridge systems exist. Two field sites in Buor Khaya Bay were visited during an expedition in August 2017 in order to obtain baseline information to assess the potential of the systems for the reconstruction of Holocene sea level and past sea-ice extent. The inner parts of the bay are ice-free for three to four months during the short boreal summer. The wave forcing of the system is hence a function of the duration of ice-free conditions and fetch across the open sea surface. Both systems are composed of several sets of beach ridges composed of sand- to cobble-sized shales of local origin. The morphological arrangement of landforms and the characteristics of the beach deposits evidence (1) extensive periods of continuous progradation, and (2) unconformities with changes in ridge orientation suggesting fluctuations in the directional components of energy supply and sediment delivery. The project is at an early stage of investigation and we present first insights into a new and promising area of investigation. Work will be continued in summer 2018. |
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