Astrobiologists supported by NASA recently reported the results of an expedition to hydrothermal vents in the Arctic Ocean that could be an excellent analog for similar systems on icy worlds in our solar system. A new publication expands on reports from the unique research site, providing details about the ultra-slow spreading Gakkel …
The 1,800-km-long Gakkel ridge is the slowest-spreading mid-ocean ridge in the world. It forms the North America/Eurasia plate boundary in the Arctic Ocean ().To the west it passes via the Lena ...
We investigated the link between geochemistry and microbial communities in two 3-m-long sediment cores from the ultraslow-spreading Arctic Mid-Ocean Ridge system. The cores were retrieved 15 km southwest and 15 km northeast of the active hydrothermal field Loki's Castle (Fig. P1A) . The site is one of only a few localities where substantial ...
Sediment core ARC3-B85D from the Alpha Ridge with the estimated stratigraphy covering ∼350 kyr is used to investigate a coupled distribution of Mn and Ce in Quaternary Arctic Ocean sediments. By analyzing Mn and Ce distribution patterns in the core and surface sediments from the western Arctic Ocean and adjacent shelves, we investigate the ...
Oceanic ridge, any of several submarine mountain chains rising from the ocean floor. Individually, the ridges are the largest features in ocean basins. Collectively, they form the worldwide oceanic ridge system—at about …
Detailed bathymetry of the East Gakkel Ridge at 85°E in the Arctic Ocean. The inset map shows the location of the 85°E segment (yellow star) along the Gakkel Ridge (red line). The main panel shows illuminated color …
Arctic is the smallest and shallowest of the world's oceans. 5. Arctic has abundant natural resources. 6. Arctic Ocean experiences a polar climate. 7. Has a cool underwater ridge called the Lomonosov Ridge. 8. Arctic is home to polar bears, which are not found anywhere else in the world.
The Arctic Ocean is the smallest of the world oceans, yet one whose currents and water masses extend globally. ... densest water from the Greenland Sea from reaching the western Arctic Ocean. This ridge, the Lomonosov Ridge, had, unknown to Worthington, been detected by Soviet scientists in 1948. It was not until Aagaard (1980) …
The three ridges, as labelled are the Alpha Ridge, Lomonosov Ridge and the Gakkel Ridge, the latter being the slow moving plate boundary between the Eurasian and North American plates as an …
The Arctic Ocean floor features three major ridge systems: the Alpha-Mendeleev Ridge, the Lomonosov Ridge, and the Gakkel Ridge. Both the Lomonosov and Alpha-Mendeleev Ridges pass through the ocean from the margin of Siberia to that of Greenland and North America.
It is the second time that China conducts a survey on the Gakkel Ridge, a mid-ocean ridge stretching about 1,800 kilometers in the Arctic. The Gakkel Ridge, a new volcanic ridge, is the Earth's slowest-spreading mid-ocean ridge, which is important in studying the expansion of global tectonic plates, said Wang.
Nature - Some refractory rocks from the ultra-slow spreading Gakkel ridge (Arctic Ocean) have model ages up to 2 billion years, implying the long-term …
An extension of this world encircling ridge into the Greenland Sea and Arctic Ocean was first hypothesized on the basis of a well defined pattern of earthquake epicentres and a few spot soundings 1,2.
Lomonosov Ridge, major submarine ridge of the Arctic Ocean. The ridge is 1,100 miles (1,800 km) long. From Ellesmere Island on the continental shelf of North …
The Gakkel ridge, stretching ∼ 1,800 km across the eastern Arctic Basin, is the ultraslow-spreading end-member of the global mid-ocean ridge (MOR) system, and in 1999 the Global Seismic Network ...
Details of the ridge came to light in the first published version of IBCAO 16 where it was drastically remapped compared to the GEBCO Sheet 5.17 36, which had served as the authoritative ...
A giant caldera located in the eastern segment of the Gakkel Ridge could be firstly seen on the bathymetric map of the Arctic Ocean published in 1999. In 2014, seismic and multibeam echosounding ...
Heterogeneous Mantle beneath Gakkel Ridge, Arctic Ocean. Nature 452:311-316. (Article). Snow, J. and petrology group ARK XX-2 (2007) Petrology of Lena Trough and Gakkel Ridge in: G. Budéus and P. Lemke (2007). The Expeditions ARKTIS-XX/1 and XX/2 of the Research Vessel "Polarstern" in 2004.
Beneath the icy surface of the Arctic Ocean lies the Lomonosov Ridge, an underwater mountain range that stretches over 1,800 miles. Russia, Canada, and Denmark (via Greenland) have all made territorial claims on parts of this ridge, due to its potential mineral and energy resources, particularly oil and gas.
Gakkel ridge stretches 1,800 km across the Eurasian basin of the Arctic Ocean ().To the west the plate boundary passes via the Lena trough and the Molloy fracture zone into the Knipovich ridge.
Mid-Atlantic Ridge, submarine ridge lying along the north-south axis of the Atlantic Ocean; it occupies the central part of the basin between a series of flat abyssal plains that continue to the margins of the continental coasts. …
Russia has formally enlarged its claim to the seabed in the Arctic Ocean all the way to Canada's and Greenland's exclusive economic zones. ... The ships ventured over sections of the Lomonosov Ridge, a …
In August 2007 Russia planted their flag on the ocean bottom 4,200 m (14,000 ft) under the north pole to demonstrate their Arctic dominance to the international community. Similar to planting the ...
We present a new sedimentary record from the Northwind Ridge, an elevated seafloor structure extending north from the Chukchi-Alaskan margin to the center of the western Arctic Ocean (Fig. 1).This area is predominated currently by the Beaufort Gyre circulation with attendant hydrographic and depositional conditions.
The Gakkel Ridge The Gakkel Ridge is a spreading ridge that separates the Nansen and Amundsen Basins. It is a continuation of the mid-oceanic ridge system into the Arctic Ocean (e.g., Johnson and …
At present, the circum-Arctic region consists of two major basins, the Eurasia basin and the Amerasia basin, orthogonal to each other and divided by the Lomonosov Ridge (21, 22).During the Jurassic and the Cretaceous, the circumpolar region was affected by various subduction events, opening and closing of ocean basins, accretion of terranes, and large …
Rekant, P., et al. "Basement Segmentation and Tectonic Structure of the Lomonosov Ridge, Arctic Ocean: Insights from Bedrock Geochronology." Journal of Geodynamics 128 (2019): 38-54. Print. Sidortsov, R. "Benefits over Risks: A Case Study of Government Support of Energy Development in the Russian North." Energy Policy 129 …
The Gakkel ridge, which extends under the Arctic ice cap for ∼ 1,800 km, is the slowest spreading ocean ridge on Earth. Its spreading created the Eurasian basin, which is isolated from the rest ...
Arctic Ocean - Sea Ice, Polar Regions, Climate Change: The cover of sea ice suppresses wind stress and wind mixing, reflects a large proportion of incoming solar radiation, imposes an upper limit on the surface temperature, and impedes evaporation. Wind and water stresses keep the ice pack in almost continuous motion, causing the formation of cracks …
The Arctic Ocean is divided into two basins-Eurasian Basin and Amerasia Basin-by the Lomonosov Ridge. The ridge is 40-120 miles wide, with a mean relief of 10 thousand feet. The Mid-Atlantic Ridge's …