Marine Geophysics and Hydroacoustics

Expeditions on small platforms and remote areas

Hydroacoustic mapping of Lake Sary-Chelek, Kyrgyzstan

Summary

Lake Sary-Chelek is a small lake in Western Kyrgyzstan, within the Tien Shan Mountain range at an altitude of about 1880m above sea level (Figure). It covers an area of ~5 km², with 6.5 km length and up to 2 km long. Water depth reaches up to 220 m in the center of Lake Sary-Chelek. The lake formed by river damming during a chatastrophic rockslide, which originated from a 2700 m high mountain chain southeast of the lake (Strom and Korup, 2006; Strom 2010). The rockslide has been More

Siberian Lakes

PLOT - Paleolimnological Transect: Quaternary Climate Gradients Along Northern Eurasia and Potentials for Deep Drilling

Summary

The German-Russian PLOT project (Paleolimnological Transect) aims at investigating the climatic and environmental changes in Northern Eurasia during the Late Quaternary, through analysis of sediment records within five lakes (Ladoga, Bolshoye Shuchye, Levinson-Lessing, Taymyr and Emanda). Together with Lake El‘gygytgyn (already drilled), they form a 6000 km-long transect that will provide a comprehensive record of the Late Quaternary environmental history of Northern Eurasia. more

Caldera Lake Bolsena (Italy)

Summary

The Bolsena caldera formed between 0.6 and 0.2 Ma is an ideal site to study the tectonic and volcanic evolution of calderas. The main area is covered by an 150 m deep lake. A High resolution hydro-acoustic survey using a multichannel reflection seismic system and a sediment echo-sounder system were conducted in Sept. 2012.

As space was limited we used a rowing boat towed by a rubber boat to handle a 36 m long and 24 channel streamer to receive seismic reflections produced using a Mini GI-Gun (0.25 l). More

Lake Constance (Germany)

Summary

Lake Constance is the largest lake in Germany with a lentgh of 60 km, a width of 10 km and a maximum water depth of 250 m. Present lake level is about 395 m above sea level. Lake topography has been extensively surveyed in the last couple of years within the frame of the Projekt  "Tiefenschärfe" of the German Research Institut for lake research in Langenargen. More

NICA-BRIDGE, Lakes in Nicaragua

Seismic reconnaissance survey for the ICDP proposal ‘Paleoclimate, Paleoenvironment, and Paleoecology of Neogene Central America: Bridging Continents and Oceans


Summary

The two largest lakes in Central America, Lake Nicaragua and Lake Managua, are situated in the south-central part of Nicaragua. The location and the proposed long existence (at least Pliocene possibly Late Miocene) make these lakes promising targets for scientific drilling within the International Continental Drilling Program. more

Lake Ohrid

Summary

Lake Ohrid, located on the Balkan Peninsula within the Dinaride-Hellenide-Albanide mountain chain (Macedonia/Albania) is probably the oldest, continuously existing lake in Europe (2-5 Ma).

Surveys

Multidisciplinary including multichannel seismics, sediment echosounder, and coring at Lake Ohrid prove that it is an important archive to study the sedimentary and tectonic evolution of a graben system over a long time period. Within the frame of the International Continental Drilling Program (ICDP) a successful deep drilling campaign was carried out in spring 2013 with more than 2000 m of sediment cores at four sites. more

Lake Van, Turkey

 

Summary

Lake Van in Eastern Anatolia (Turkey) is the fourth largest terminal lake in the world with a surface area of 3,574 km², a volume of 607 km³, a maximum depth of 450 m, and a maximal length of 130 km WSW-ENE (Wong and Degens, 1978). Over 1500 km of multi-channel seismic reflection profiles in combination with ICDP drilling and bathymetric data from Lake Van, eastern Turkey, allow to reconstruct stratigraphic evolution of the lake basin. Three major basins (Tatvan, Deveboynu and the Northern basin) are separated from each other by Ahlat and Northern ridges. more