Hipercorig – an innovative hydraulic coring system recovering over 60 m long sediment cores from deep perialpine lakes

Harms, Ulrich; Raschke, Ulli; Anselmetti, Flavio S.; Strasser, Michael; Wittig, Volker; Wessels, Martin; Schaller, Sebastian; Fabbri, Stefano C.; Niederreiter, Richard; Schwalb, Antje (2020). Hipercorig – an innovative hydraulic coring system recovering over 60 m long sediment cores from deep perialpine lakes. Scientific Drilling, 28, pp. 29-41. Copernicus Publications 10.5194/sd-28-29-2020

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The record of past environmental conditions and changes archived in lacustrine sediments serves as an important element in paleoenvironmental and climate research. A main barrier in accessing these archives is the undisturbed recovery of long cores from deep lakes. In this study, we have developed and tested a new, environmentally friendly coring tool and modular barge, centered around a down-the-hole hydraulic hammering of an advanced piston coring system, called the Hipercorig. Test beds for the evaluation of the performance of the system were two periglacial lakes, Mondsee and Constance, located on the northern edge of the Alpine chain. These lakes are notoriously difficult to sample beyond ∼ 10 m sediment depths due to dense glacial deposits obstructing deeper coring. Both lakes resemble many global lake systems with hard and coarse layers at depth, so the gained experience using this novel technology can be applied to other lacustrine or even marine basins.
These two experimental drilling projects resulted in up to 63 m coring depth and successful coring operations in up to 204 m water depth, providing high-quality, continuous cores with 87 % recovery. Initial core description and scanning of the 63 m long core from Mondsee and novel insights beyond the onset of deglaciation of the northern Alpine foreland dating back to ∼ 18 400 cal BP.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences
08 Faculty of Science > Institute of Geological Sciences > Quaternary Geology

UniBE Contributor:

Anselmetti, Flavio; Schaller, Sebastian and Fabbri, Stefano C.

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

1816-3459

Publisher:

Copernicus Publications

Language:

English

Submitter:

Flavio Anselmetti

Date Deposited:

13 Jan 2021 10:12

Last Modified:

13 Jan 2021 10:12

Publisher DOI:

10.5194/sd-28-29-2020

BORIS DOI:

10.48350/148751

URI:

https://boris.unibe.ch/id/eprint/148751

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