Initiation of the Iceland Plume and Opening of the North Atlantic

1989 ◽  
Author(s):  
R. S. White
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic ◽  
Iceland Plume

The Iceland plume in space and time: a Sr–Nd–Pb–Hf study of the North Atlantic rifted margin

2000 ◽  
Vol 177 (3-4) ◽  
pp. 255-271 ◽  
Author(s):  
P.D. Kempton ◽  
J.G. Fitton ◽  
A.D. Saunders ◽  
G.M. Nowell ◽  
R.N. Taylor ◽  
...  
Keyword(s):  
North Atlantic ◽  
Space And Time ◽  
The North ◽  
The North Atlantic ◽  
Iceland Plume ◽  
Rifted Margin

scholarly journals The deep Earth origin of the Iceland plume and its effects on regional surface uplift and subsidence

2016 ◽  
Author(s):  
N. Barnett-Moore ◽  
R. Hassan ◽  
N. Flament ◽  
R. D. Müller
Keyword(s):  
North Atlantic ◽  
Flow Model ◽  
Mantle Flow ◽  
Seismic Structure ◽  
Dynamic Topography ◽  
The North ◽  
Deep Mantle ◽  
Deep Earth ◽  
The North Atlantic ◽  
Iceland Plume

Abstract. The present-day seismic structure of the mantle under the North Atlantic indicates that the Iceland hotspot represents the surface expression of a deep mantle plume, which is thought to have erupted in the North Atlantic during the Paleocene. The spatial and temporal evolution of the plume since its eruption is still highly debated, and little is known about its deep mantle history. Here, a paleogeographically constrained global mantle flow model is used to investigate the evolution of deep Earth flow and surface dynamic topography in the North Atlantic since the Jurassic. The model shows that over the last ~ 100 Myr a remarkably stable pattern of convergent flow has prevailed in the lowermost mantle near the tip of the African Large Low-Shear Velocity Province (LLSVP), making it an ideal plume nucleation site. The present-day location of the model plume is ~ 10° southeast from the inferred present-day location of the Iceland plume. We apply a constant surface rotation to the model through time, derived from correcting for this offset at present-day. A comparison between the rotated model dynamic topography evolution and available offshore geological and geophysical observations across the region confirms that a widespread episode of Paleocene transient uplift followed by early Eocene anomalous subsidence can be explained by the mantle-driven effects of a plume head ~ 2000 km in diameter, arriving beneath central western Greenland during the Paleocene. The rotated model plume eruption location beneath Western Greenland is compatible with previous models. The mantle flow model underestimates the magnitude of observed anomalous subsidence during the Paleocene in some parts of the North Atlantic by as much as several hundred meters, which we attribute to upper mantle convection processes, not captured by the model.

The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism

2021 ◽  
Vol 569 ◽  
pp. 117048
Author(s):  
Nicolas Luca Celli ◽  
Sergei Lebedev ◽  
Andrew J. Schaeffer ◽  
Carmen Gaina
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic ◽  
Iceland Plume

The Currents of the North Atlantic

1892 ◽  
Vol 34 (872supp) ◽  
pp. 13940-13941
Author(s):  
Richard Beynon
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic

NATO adaptation to current challenges and mechanisms of Ukraine’s cooperation with the North Atlantic Treaty Organization

2019 ◽  
pp. 73-81
Author(s):  
Oleh Poshedin
Keyword(s):  
North Atlantic ◽  
Task Force ◽  
Response Force ◽  
Cyber Attack ◽  
Adaptation Measures ◽  
Joint Force ◽  
Security Environment ◽  
The North ◽  
The North Atlantic ◽  
Area Of Influence

The purpose of the article is to describe the changes NATO undergoing in response to the challenges of our time. Today NATO, as a key element of European and Euro-Atlantic security, is adapting to changes in the modern security environment by increasing its readiness and ability to respond to any threat. Adaptation measures include the components required to ensure that the Alliance can fully address the security challenges it might face. Responsiveness NATO Response Force enhanced by developing force packages that are able to move rapidly and respond to potential challenges and threats. As part of it, was established a Very High Readiness Joint Task Force, a new Allied joint force that deploy within a few days to respond to challenges that arise, particularly at the periphery of NATO’s territory. NATO emphasizes, that cyber defence is part of NATO’s core task of collective defence. A decision as to when a cyber attack would lead to the invocation of Article 5 would be taken by the North Atlantic Council on a case-by-case basis. Cooperation with NATO already contributes to the implementation of national security and defense in state policy. At the same time, taking into account that all decision-making in NATO based on consensus, Ukraine’s membership in the Alliance quite vague perspective. In such circumstances, in Ukraine you often can hear the idea of announcement of a neutral status. It is worth reminding that non-aligned status did not save Ukraine from Russian aggression. Neutral status will not accomplish it either. All talks about neutrality and the impossibility of Ukraine joining NATO are nothing but manipulations, as well as recognition of the Ukrainian territory as Russian Federation area of influence (this country seeks to sabotage the Euro-Atlantic movement of Ukraine). Think about it, Moldova’s Neutrality is enshrined in the country’s Constitution since 1994. However, this did not help Moldova to restore its territorial integrity and to force Russia to withdraw its troops and armaments from Transnistria.

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