Lacustrine Seismic
Lacustrine geophysical research is carried out to study tectonic, sedimentary and paleoclimate questions in lakes. As in marine geophysical research, different methods are combined (single-channel and multi-channel seismic reflection, seismic refraction, high-frequency echosounder systems, occasionally gravity and magnetic). However, as the investigation areas and targets are smaller (in terms of lake diameter as well as depth of bedrock etc.), the lacustrine equipment is downscaled and transportable.
Main topics in lacustrine seismic research are
- to map structures within the lacustrine sediments and the underlying bedrock to better understand lake geometries and, thus, the evolution and origin of the lakes
- to reconstruct the paleoclimate of the lake region and, subsequently, combine the results with marine paleoclimate reconstructions (teleconnections between terrestrial and marine records)
- to find the best coring locations for deep drilling projects (e.g. Lake El’gygytgyn, Laguna Potrok Aike)
Figures:
- Lakes in East Greenland: Lake Potsdam, Lake Noa and Lake Basalt
- Lakes on the Taymyr Peninsula: Lake Taymyr, Lake Levingson-Lessing, Lake Lama and Lake Kapchuk
- Lake El’gygytgyn, Chukotka, NE Siberia
- Lake Iznik, Turkey
- Lake Van, Turkey
- Lake Mascardia, Patagonia, Argentina
- Laguna Potrok Aike, Patagonia, Argentina