Using high-resolution geochemical data from XRF core scanning to interpret major climatic events at the Uddelermeer site (The Netherlands)
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Date
2019-07-27
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International Union for Quaternary Research (INQUA)
Abstract
High-resolution X-ray fluorescence (XRF) scanning data is used as a palaeoclimate proxy on a long sediment record retrieved from Lake Uddelermeer. Lake Uddelermeer is the only lake in The Netherlands to contain a continuous record of environmental and climate change from the late Pleistocene to present. Due to its unique character, the lake has been studied by various research groups since the 1950s. Here we focus on a newly retrieved sediment core which has been radiocarbon dated and for which a variety of palaeoecological and palaeoclimatological data is available. We scanned the 15.6 m sediment sequence at 200 µm interval and geochemical proxies were utilised to infer changes in the lake system during major climatic events, and compared our results to existing palaeoecological and palaeoclimatological data from the same sediment sequence. Commonly used proxies such as Si/Ti can imply changes in biogenic silica and Rb/Sr can suggest chemical weathering. These proxies were looked at in detail in conjunction with the dates to confirm the timing and impact of the following major events: the Bølling-Allerød, Younger Dryas, Pre-boreal oscillations, the 9.3 ka, 8.2 ka, 2.8 ka and the Little Ice Age.
Additionally, the use of high-resolution XRF scanning can be very useful for finding crypto tephra, and in this presentation, we will explore the potential occurrence of the Vedde Ash (Iceland) and the Laacher See Ash (Germany) in the sediment sequence, as well as other unidentified crypto tephra during the Last Glacial termination.
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Keywords
X-ray fluorescence analysis, Netherlands, Climatic change, Environment, Quaternary period, Drill cores, Carbon 14, Weathering, Lakes, Sediments
Citation
Gadd. P., Heijnis, H., Peti, L., & Engels, S. (2019). Using high-resolution geochemical data from XRF core scanning to interpret major climatic events at the Uddelermeer site (The Netherlands). Poster presented to the 20th INQUA Congress 25th - 31st July 2019, Dublin, Ireland. Retrieved from: https://virtual.oxfordabstracts.com/#/event/public/574/submission/1542