Ultrasonic velocity experiments on ice cores to complement fabric measurements ...
The ice crystal structure and in particular the crystal orientation fabrics (COF) provide valuable information about the deformation history of ice sheets and glaciers. Therefore, COF analysis has been among the standard measurement techniques for most deep ice core drilling projects in the last thr...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Text |
| Language: | English |
| Published: |
ETH Zurich
2021
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.3929/ethz-b-000528192 http://hdl.handle.net/20.500.11850/528192 |
| Summary: | The ice crystal structure and in particular the crystal orientation fabrics (COF) provide valuable information about the deformation history of ice sheets and glaciers. Therefore, COF analysis has been among the standard measurement techniques for most deep ice core drilling projects in the last three decades. The analysis depends on carefully prepared thin sections of ice that are measured with cross-polarised light microscopy or electron backscattering and diffraction (EBSD). The preparation of thin sections is labour-intensive and therefore only a discrete number of samples along the ice core is usually analysed. Geophysical methods such as ultrasonic sounding along the ice core could be employed to complement the discrete fabric data by providing data to fill the gaps. A suitable method needs to be reasonably fast, ideally non-invasive and provides unambiguous information in combination with the established methods. In our study, we demonstrate the feasibility of such ultrasonic experiments applied to an ... : EGUsphere ... |
|---|