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CASE Outcrop Data (WMS)

The web service of the dataset comprises the locations of outcrops with respective information on the lithology, stratigraphy, rock age and tectonic data collected during the CASE expeditions. The data attributes include stereographic projections and sketches of tectonic structures derived from the outcrop data. At the end of the 1980s, BGR initiated the research program Circum-Arctic Structural Events (CASE) to reconstruct the plate tectonic processes during the evolution of the Arctic Ocean using terrestrial data from the surrounding continental margins. One of the scientific questions of the CASE programme is as simple as it is complex: How did the Arctic Ocean, this large basin between the Eurasian and North American continental plates, develop? There are still no conclusive answers to this question in terms of plate tectonics. In contrast to the marine expeditions of geophysicists in the Arctic Ocean, geologists on land along the various coastal areas of the Arctic Ocean can directly touch, examine and map rocks, structures, folds and fault zones and determine the respective ages of the movements. This makes it possible to directly compare rock units and deformation zones on different continental plates and thus also to reconstruct when these plates collided, how long they remained next to each other and when and how they separated again. Since the inception of BGR’s Arctic research, the primary focus and research areas have been along the continental margins between Spitsbergen and the Canadian Arctic Archipelago via Greenland, to the Yukon North Slope on the border with Alaska. On the opposite side of the Arctic Ocean, there have been expeditions to Yakutia, the mainland areas near the Laptev Sea, the New Siberian Islands and to the Polar Ural with Russian partners. An important method for the interpretation of the geological evolution of the Arctic is the examination of tectonic structures (faults, folds, cleavage etc.), the determination of the kinematics and the age of the tectonic movements.

Marine Seismic Survey Profiles (MSSP) (WMS)

During the period from 1974 to 2018 various cruises from BGR acquired seismic lines worldwide. The aim of these marine expeditions was a detailed survey of the geological structure.

Marine geowissenschaftliche Daten - Projekt PANORAMA (WMS)

Im Rahmen des PANORAMA Projekts wurden vier marin-geophysikalische und marin geologische Expeditionen durchgeführt. 2013: Panorama1 mit dem Forschungsschiff RV OGS Explora, nördliche Barentssee und Eurasisches Becken; 2015: Panorama2 mit RV OGS Explora, nördliche Barentssee, Olga Becken; 2017 SEGMENT mit RV Maria S. Merian, nordöstlicher Kontinentrand Grönland; 2018 GREENMATE mit RV Polarstern, nordöstlicher und nördlicher Kontinentrand Grönland. Die geowissenschaftlichen Daten umfassen für die genannten Expeditionen 2D reflexionsseismische Daten und refraktionsseismische Daten (mit OBS bzw. Sonarboje. Zusätzlich wurden hydroakustische Daten mit den bordeigenen Fächerecholoten bzw. Sedimentecholoten aufgezeichnet. Darüber hinaus wurden gravimetrische und magnetische Daten erfasst. Geologische und geochemische Daten wurden mit Schwereloten und Multicorern genommen. Im Rahmen der Expedition Greenmate (2018) wurde auch per Helikopter Proben an der Küste NO Grönlands genommen. Ergebnisse stehen bislang in den folgenden Veröffentlichungen zur Verfügung: Berglar Kai, Franke Dieter, Lutz Rüdiger, Schreckenberger Bernd, Damm Volkmar; Initial Opening of the Eurasian Basin, Arctic Ocean; Frontiers in Earth Science; 2016; DOI=10.3389/feart.2016.00091 Rüdiger Lutz, Dieter Franke, Kai Berglar, Ingo Heyde, Bernd Schreckenberger, Peter Klitzke, Wolfram H. Geissler; Evidence for mantle exhumation since the early evolution of the slow-spreading Gakkel Ridge, Arctic Ocean; Journal of Geodynamics; 2018; https://doi.org/10.1016/j.jog.2018.01.014 Philipp Weniger, Martin Blumenberg, Kai Berglar, Axel Ehrhardt, Peter Klitzke, Martin Krüger, Rüdiger Lutz; Origin of near-surface hydrocarbon gases bound in northern Barents Sea sediments; Marine and Petroleum Geology; 2019 https://doi.org/10.1016/j.marpetgeo.2018.12.036 P. Klitzke, D. Franke, A. Ehrhardt, R. Lutz, L. Reinhardt, I. Heyde, J.I. Faleide; The paleozoic evolution of the Olga Basin region, northern Barents Sea – a link to the timanian orogeny; G-cubed, 20 (2) (2019); 10.1029/2018GC007814 Rüdiger Lutz, Peter Klitzke, Philipp Weniger, Martin Blumenberg, Dieter Franke, Lutz Reinhardt, Axel Ehrhardt, Kai Berglar; Basin and petroleum systems modelling in the northern Norwegian Barents Sea; Marine and Petroleum Geology; 2021; https://doi.org/10.1016/j.marpetgeo.2021.105128. Franke, D., Klitzke, P., Barckhausen, U., Berglar, K., Berndt, C., Damm, V., Dannowski, A., Ehrhardt, A., Engels, M., Funck, T., Geissler, W., Schnabel, M., Thorwart, M. & Trinhammer, P. (2019): Polyphase Magmatism During the Formation of the Northern East Greenland Continental Margin. - Tectonics, 38, 8: 2961–2982, DOI: 10.1029/2019tc005552.

Helicopter-borne Magnetics in the Arctic region (WMS)

The study of the geodynamic evolution of the Arctic continental margin and opening of the Arctic Ocean represents a primary target of BGR research and is studied within the frame of the CASE programme. In addition to onshore geological investigations, BGR conducts airborne aeromagnetic surveys. The available service contains the results of aeromagnetic surveys from the CASE program as well as cooperation projects (PMAP, NARES & NOGRAM), which were obtained with helicopters or fixed-wing aircraft in the Arctic.

Processed seismic data of Cruise BGR18 2018 (PS115/1)

The expedition PS155/1 started on August 5th, 2018 in Tromsø (Norway) and ended in Longyearbyen (Spitsbergen) on September 3rd, 2018. In the course of BGR’s GREENMATE project the geological development of the European North Atlantic and the northern and north eastern Greenland shelf was analyzed using various marine geophysical methods (seismics, magnetics, gravity, heatflow measurements) and geological sampling (gravity corer, box corer, multi-corer, dredge). Sampling of marine Shelf sediments was undertaken in close correspondence with co-users from Geomar (add-on project ECHONEG), aiming to reconstruct Holocene paleo environmental and climatic evolution. Using the ship’s helicopters, marine sampling was complemented by onshore sampling operations to extract geological material at selected near coastal locations. Other scientific project groups used the cruise PS115.1 as an opportunity to quantify marine mammals and sea birds and their statistical distribution in our research area as part of the long-term project (add-on project Birds& Mammals) and to gather additional meteorological data via radiosondes (add-on Project YOPP). Against all expectations, outstanding ice conditions along the northern coast of Greenland enabled us to carry out reflection seismic surveys north of 84°N at the southern tip of Morris Jesup Rise with a 3 km long streamer. Structural data of this particular region of North Greenland is of special importance for BGR’s project GREENMATE for reconstructing the continental margin evolution. A 100 km long refraction seismic profile was measured to complement the reflection seismic data. After completing this, scientific work was concentrated on the northeastern Greenland shelf area between 76°N and 82.5°N. Over the time of the cruise a total of 2500 km of reflection seismic profiles (2250 km measured with 3km streamer length) and 100 km of refraction seismic profile (using nine ocean bottom seismometers) were measured, accompanied by gravity and magnetic surveys and seven heat flow measurement stations. Along the shelf and deep-sea area 21 geological sampling sites were chosen, with all together one dredge (around 200 kg of sample), 16 gravity cores (total core length 65 m), 12 box corers and 6 multi-corer stations. Onshore sediment sampling was done at 11 sampling sites. Beside sediment sampling hard rock from near coastal outcrops was collected in a total amount of 250 kg that will be used for age dating. The entire science program was carried out under consideration of the highest ecological standards to protect marine mammals and to meet all environmental requirements of the permitting authorities. In addition to external marine mammal observers (MMO) various acoustic monitoring systems and AWI’s on board infrared detection system AIMMS monitored any activity of marine mammals in the ships perimeter, especially during seismic operations.

Processed seismic data of Cruise Nares 2001

The Scientific staff and crew onboard CCGS Louis S. St. Laurent (LSL) returned September the 10th, 2001 from a scientific expedition to the Nares Strait, the northernmost waterway connecting the Arctic and Atlantic oceans. The data format is Society of Exploration Geophysicists SEG Y. The ice conditions in the strait required the support of Canada's largest ice breaker. The ship was a versatile platform for 34 scientists to accomplish their marine investigation. The LSL has a history of supporting international scientific expeditions including an oceanographic transect of the Arctic Ocean in 1994 and a biological study of the Canadian Arctic Islands in 1999. Germany (Bundesanstalt für Geowissenschaften und Rohstoffe, BGR) and Canada (Geological Survey of Canada) undertook a 5-week scientific cruise to study and explore the geological structure and evolution of the Nares Strait. The primary objective was the study of structural features relating to the formation of the Arctic Ocean and, in particular, the study of the Wegener Fault. This fault is a linear boundary between Greenland and Ellesmere Island which was noted by the German scientist Alfred Wegener in 1915 and later became the subject of a major scientific controversy. The co-operative cruise, which was planned over a period of 2 years, provided the basis for a wide range of scientific investigations, from marine seismic work and climate change studies through airborne magnetic investigations to geodetic survey measurements and geological sampling onshore. Systematic geophysical offshore studies in this key area had not been undertaken before. Where towing of seismic equipment was not possible because of ice coverage, magnetic maps were made using a helicopter-borne magnetic sensor system. Sediment and water samples taken during the cruise provide information on changes in climate and sea ice cover from the last ice-age to the present. An 11 m-long sediment core from outer Jones Sound is the longest core ever taken in the Canadian Arctic channels and holds clues to the detailed climate history of northern Baffin Bay.

CASE Outcrop Data

The dataset comprises the locations of outcrops with respective information on the lithology, stratigraphy, rock age and tectonic data collected during the CASE expeditions. The data attributes include stereographic projections and sketches of tectonic structures derived from the outcrop data. At the end of the 1980s, BGR initiated the research program Circum-Arctic Structural Events (CASE) to reconstruct the plate tectonic processes during the evolution of the Arctic Ocean using terrestrial data from the surrounding continental margins. One of the scientific questions of the CASE programme is as simple as it is complex: How did the Arctic Ocean, this large basin between the Eurasian and North American continental plates, develop? There are still no conclusive answers to this question in terms of plate tectonics. In contrast to the marine expeditions of geophysicists in the Arctic Ocean, geologists on land along the various coastal areas of the Arctic Ocean can directly touch, examine and map rocks, structures, folds and fault zones and determine the respective ages of the movements. This makes it possible to directly compare rock units and deformation zones on different continental plates and thus also to reconstruct when these plates collided, how long they remained next to each other and when and how they separated again. Since the inception of BGR’s Arctic research, the primary focus and research areas have been along the continental margins between Spitsbergen and the Canadian Arctic Archipelago via Greenland, to the Yukon North Slope on the border with Alaska. On the opposite side of the Arctic Ocean, there have been expeditions to Yakutia, the mainland areas near the Laptev Sea, the New Siberian Islands and to the Polar Ural with Russian partners. An important method for the interpretation of the geological evolution of the Arctic is the examination of tectonic structures (faults, folds, cleavage etc.), the determination of the kinematics and the age of the tectonic movements.

Helicopter-borne Magnetics NARES I + II (Kane Basin)

In May/June 2001, as part of the expedition NARES I, an aeromagnetic survey was carried out in the area of the eastern Kane Basin in cooperation with the Canadian GSC, in addition to the survey over the Robeson Channel and parallel to marine geophysical investigations with the Canadian icebreaker Louis S. St. Laurent. Another survey, NARES II, was conducted from Alexandra Fiord in 2003 and covered coastal areas of Ellesmere Island and the western Kane Basin. The aim of the research was to detect and localize the Wegener Fault, a transform fault between Ellesmere Island and NW Greenland, which is closely linked to the opening of the North Atlantic and the Arctic Ocean. The helicopter-borne magnetic surveys NARES I + II (Kane Basin) were carried out with a flight line spacing of 2 km, and control profiles were flown every 10 km. During the two expeditions, 11806 km of line data were collected (3573 km in 2001, and 8333 km in 2003), covering an area of approximately 20000 km². The aeromagnetic data were recorded by a magnetometer, which was towed approx. 25 m beneath the helicopter.

Helicopter-borne Magnetics NARES I (Robeson Channel)

During the German-Canadian Nares Strait Expedition in 2001, an aeromagnetic survey was carried out across the northern part of the Nares Strait including the Hall Basin, Judge Daly Promontory and in Robeson Channel in cooperation with the Canadian GSC. The aim of the research was to detect and localize the Wegener Fault, a transform fault between Ellesmere Island and NW Greenland, which is closely linked to the opening of the North Atlantic and the Arctic Ocean. The helicopter-borne magnetic survey NARES I (Robeson Channel) was carried out with a flight line spacing of 2 km, and control profiles were flown every 10 km. During the expedition, 5470 km of line data were collected. The aeromagnetic data were recorded by a magnetometer, which was towed approx. 25 m beneath the helicopter and recorded at a constant altitude of 305 m (1000 ft) above ground.

EU, USA und Kanada starten Allianz zur Erforschung des Atlantiks

Die Europäische Union, die Vereinigten Staaten und Kanada vereinbarten am 24. Mai 2013, ihre Anstrengungen zur Erforschung des Atlantischen Ozeans zu bündeln. Es geht im Wesentlichen darum, die Beobachtung des Ozeans aufeinander abzustimmen. Angestrebt werden ein besseres Verständnis des Atlantiks und die Förderung einer nachhaltigen Bewirtschaftung seiner Ressourcen. Bei den Forschungsarbeiten wird auch das Wechselspiel zwischen dem Atlantischen Ozean und dem Nordpolarmeer, vor allem im Hinblick auf den Klimawandel, untersucht. Die „Erklärung von Galway über die Zusammenarbeit in Bezug auf den Atlantischen Ozean“ wurde auf einer hochrangigen Konferenz im irischen Meeresinstitut in Galway unterzeichnet.

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