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Abstract:
Understanding the evolution of Earth´s climate and environment in the past plays a crucial role to understand its future. Recovery
of sedimentary records deposited in lakes provides access to high-resolution long-term archives of this history. The techniques to
unearth these archives have to be adapted in each environment to water depth, sediment length targeted at and consolidation of the
strata to be recovered. Coring devices ranging from hand-held corer to a professional-operated drill rig mounted on a modular barge
are therefore deployed to recover undisturbed sediments from lakes of different sizes.
At the German Research Centre for Geosciences GFZ sediments from small lakes are retrieved mainly through deploying cable-guided
piston coring tools from small rafts. Up to almost 100 m core length can be reached with just a small group of scientist. However, in
large lakes such as the Dead Sea it is necessary to utilize a marine barge holding a wireline diamond coring drillrig operated by a
qualified crew on a 24/7 base. Drillstring lengths of 1000 m and more in several hundred m water depths are retrieved with ICDPs
Deep Lake Drilling System.
