Analysis of minerals from Arctic Ocean sediments

• Main Author: Vogt, Christoph
• Format: Other/Unknown Material
• Language: English
• Published: PANGAEA 2012
• Subjects: 302-M0002A; 4391-2; 4413-1; 4416-1; ACEX-M2A; Amundsen Basin; Arctic Coring Expedition; ACEX; Arctic Ocean; ARK-IX/4; ARK-VIII/2; ARK-VIII/3; AWI_Paleo; B20A; B21B; B23A; B24A; B25A; B26B; B28B; B30A; B31A; B32; B5; Barents abyssal plain; Barents Sea; BC; Bear Island Trough; Box corer; CCGS Captain Molly Kool (Vidar Viking); DM49; Dmitry Mendeleev; Exp302; Fletcher Abyssal Plain; Gakkel Ridge; GC; GERG; Giant box corer; Giant piston corer; GKG; GPC; Gravity corer; Gravity corer (Kiel type); Gravity corer (Russian type); Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Jenissei; KAL; KAL_R; amundsen basin; Arctic; Arctic Archipelago; Bear Island; Berichte zur Polarforschung; Canadian Arctic Archipelago; Ice; Iceberg*; North Atlantic; permafrost; Polar Research; Polarforschung; Reports on polar research; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.778039; https://doi.org/10.1594/PANGAEA.778039

The Arctic Ocean System is a key player regarding the climatic changes of Earth. Its highly sensitive ice Cover, the exchange of surface and deep water masses with the global ocean and the coupling with the atmosphere interact directly with global climatic changes. The output of cold, polar water and sea ice influences the production of deep water in the North Atlantic and controls the global ocean circulation ("the conveyor belt"). The Arctic Ocean is surrounded by the large Northern Hemisphere ice sheets which not only affect the sedimentation in the Arctic Ocean but also are supposed to induce the Course of glacials and interglacials. Terrigenous sediment delivered from the ice sheets by icebergs and meltwater as well as through sea ice are major components of Arctic Ocean sediments. Hence, the terrigenous content of Arctic Ocean sediments is an outstanding archive to investigate changes in the paleoenvironment. Glazigenic sediments of the Canadian Arctic Archipelago and surface samples of the Arctic Ocean and the Siberian shelf regions were investigated by means of x-ray diffraction of the bulk fraction. The source regions of distinct mineral compositions were to be deciphered. Regarding the complex circumpolar geology stable christalline shield rocks, active and ancient fold belts including magmatic and metamorphic rocks, sedimentary rocks and wide periglacial lowlands with permafrost provide a complete range of possible mineral combinations. Non- glaciated shelf regions mix the local input from a possible point source of a particular mineral combination with the whole shelf material and function as a sampler of the entire region draining to the shelf. To take this into account, a literature research was performed. Descriptions of outcropping lithologies and Arctic Ocean sediments were scanned for their mineral association. The analyses of glazigenic and shelf sediments yielded a close relationship between their mineral composition and the adjacent source region. The most striking difference between the ...