Results 291 to 300 of about 91,982 (339)

Continental Rift Zone Magmatism

2007
Basaltic magmatism appears to be a common manifestation of extensional tectonics within continental plates. In Chapter 10 we focused our attention on the dominantly fissure-fed sub-alkaline (tholeiitic) flood basalt provinces, whereas in this chapter we shall concentrate on those more alkaline provinces, closely associated with rift/graben structures ...
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Magma-compensated crustal thinning in continental rift zones

Nature, 2009
Continental rift zones are long, narrow tectonic depressions in the Earth's surface where the entire lithosphere has been modified in extension. Rifting can eventually lead to rupture of the continental lithosphere and creation of new oceanic lithosphere or, alternatively, lead to formation of wide sedimentary basins around failed rift zones ...
Thybo, Hans, Nielsen, Christoffer Alsted
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Faults of the Baikal rift zone

Tectonophysics, 1978
Abstract Baikal rift-zone faults range in magnitude from major through regional to local. The major, transcrustal faults of pre-Cenozoic initiation frame the structural pattern of the rift zone. Rifting causes a rejuvenation of all important faults regardless of their original type, many becoming oblique-slip faults.
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Volcanism of the Baikal rift zone

Tectonophysics, 1987
Abstract The volcanism of the Baikal rift zone is a specific case of intraplate volcanism where the tensional stress field in the lithosphere under the rift zone does not greatly exceed local tension in other volcanic regions of Central Asia in which rifting was not morphologically expressed.
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Seismotectonics of the Baikal rift zone

Tectonophysics, 1978
Abstract High seismicity in the Baikal rift zone is controlled by the development of conjugate rising and subsiding block structures. Many types of seismological phenomena resulting from large earthquakes are manifested in the rift zone and include seismotectonic (regional, zonal and local), gravity-seismotectonic and seismogravitational deformations.
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Heat flow in the Kenya rift zone

Tectonophysics, 1994
Abstract An understanding of the processes of continental rifting is fundamental to understanding the evolution of the continents. Considerable evidence exists to suggest that continental rift zones are associated with high heat flow and elevated lithospheric geotherms, but direct heat-flow measurements from young rifts do not clearly define surface ...
J. Wheildon, Paul Morgan, K.H. Williamson, T.R. Evans, C.A. Swanberg   +4 more
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Hydrothermal mineralization along submarine rift zones, Hawaii

Marine Georesources & Geotechnology, 1996
This is the first article to describe mineralization of midplate submarine rift zones and hydrothermal manganese oxide mineralization of midplate volcanic edifices. Hydrothermal Mn oxides were recovered from submarine extensions of two Hawaiian rift zones, along Haleakala and Puna Ridges.
James R. Hein, Ann E. Gibbs, David A. Clague, Michael Torresan   +3 more
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Crustal extension in the Baikal rift zone

Tectonophysics, 1991
Analysis of the gravity field along four profiles crossing the Baikal rift zone permits an estimate of the amount of anomalous mass produced by 1. (1) graben-fill sediments, 2. (2) Moho uplift and intrusion of mantle sills and dikes, 3. (3) an asthenospheric bulge.
Yu. Zorin, Lindrith Cordell
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Palaeomagnetism in the Oslo Rift Zone

1978
Recent palaeomagnetic results (both published and unpublished) from the Oslo region, including data from plutonics, rhomb porphyry lavas, interbasaltic sedimentary horizons and dike rocks, are reviewed. These results suggest that in the southern and western areas of the rift zone there has been substantial magmatism of pre-Kiaman age (i. e. pre ca. 300
K. M. Storetvedt, S. Pedersen, R. Løvlie, E. Halvorsen   +3 more
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Continental Rift zones: Their arrangement and development

Tectonophysics, 1972
Abstract The rift zones may be classified as oceanic, continental and intercontinental (e.g., the Red Sea and Gulf of Aden). Most of the rift zones are connected and form the world rift system. A notable exception is the Lake Baikal Rift. The Cenozoic continental rifts form two groups; the first associated with platforms and the second with young ...
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