Results 201 to 210 of about 55,466 (230)

Continental Accretion: From Oceanic Plateaus to Allochthonous Terranes

Science, 1981
Some of the regions of the anomalously high sea-floor topography in today's oceans may be modern allochthonous terranes moving with their oceanic plates. Fated to collide with and be accreted to adjacent continents, they may create complex volcanism, cut off and trap oceanic crust, and cause orogenic deformation.
Z, Ben-Avraham, A, Nur, D, Jones, A, Cox
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Oceanic Plateau Formation Implied by Ontong Java Plateau, Kerguelen Plateau and Shatsky Rise

Journal of Ocean University of China, 2019
Oceanic plateaus are a significant type of large igneous provinces in the oceans, providing insights to regional tectonic events and mantle behavior. The three world’s largest oceanic plateaus, the Ontong Java Plateau, the Kerguelen Plateau and the Shatsky Rise, are representatives in displaying extraordinary fluxes of magma from mantle to lithosphere.
Jinchang Zhang, Yiming Luo, Jie Chen
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Central Tibetan Meso-Tethyan oceanic plateau

Lithos, 2014
Abstract We report the occurrences of the remnants of a Meso-Tethyan oceanic plateau, encompassing an area of ~ 2 × 105 km2 in central Tibet. The plateau remnants include large volumes of pillow basalt formed largely by emergent to subaerial eruption, minor ultramafic intrusives and cumulates, exotic blocks of limestone, radiolarian chert, graywacke,
Kai-Jun Zhang, Bin Xia, Yu-Xiu Zhang, Wei-Liang Liu, Lu Zeng, Jian-Feng Li, Li-Feng Xu   +6 more
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Oceanic plateaus: Problematic plumes, potential paradigms

Chemical Geology, 2007
Oceanic plateaus are vast areas (N2—105 km2) of thicker than average oceanic crust (up to 38 km) that typically are elevated 2-3 km above the surrounding seafloor. Because of their thick, relatively high-standing crust, portions of oceanic plateaus can accrete to convergent continental margins and thus have contributed to continental growth over time ...
Andrew C. Kerr, John J. Mahoney
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Are oceanic plateaus sites of komatiite formation?

Geology, 1991
During Cretaceous and Tertiary time a series of oceanic terranes were accreted onto the Pacific continental margin of Colombia. The island of Gorgona is thought to represent part of the most recent, early Eocene, terrane-forming event. Gorgona is remarkable for the occurrence of komatiites of middle Cretaceous age, having MgO contents up to 24%.
STOREY, M, MAHONEY, JJ, KROENKE, LW, SAUNDERS, AD   +3 more
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Oceanic plateaus as meteorite impact signatures

Nature, 1982
The oceanic plateaus are an enigmatic set of deep ocean structures1–5. Could these be signatures of ancient meteorite impacts? While numerous confirmed and suspected impact sites, ranging in age from Precambrian to Recent, have been identified on the continents6, none has thus far been identified in the oceans.
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Anomalous crustal structures in ocean basins: Continental fragments and oceanic plateaus

Earth and Planetary Science Letters, 1980
Plateau-like features in ocean basins exhibit crustal structures which differ markedly from the relatively simple, three-layer model which applies to most of the oceanic crust. While some plateaus are known or thought to be fragments of continental crust (e.g. Rockall Bank, Lord Howe Rise), others appear to be of oceanic origin (e.g.
R.L. Carlson, N.I. Christensen, R.P. Moore   +2 more
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No Oceanic Plateau— No Caribbean Plate? The Seminal Role of an Oceanic Plateau in Caribbean Plate Evolution

2003
Oceanic plateaus are areas of elevated and anomalously thick oceanic crust that are believed to form by enhanced partial melting in a mantle plume that is hotter than ambient upper asthenosphere. They are regarded as the oceanic equivalent of continental flood-basalt provinces.
Andrew C. Kerr, Rosalind V. White, Patricia M. E. Thompson, John Tarney, Andrew D. Saunders   +4 more
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From oceanic plateaus to allochthonous terranes: Numerical modelling

Gondwana Research, 2014
Large segments of the continental crust are known to have formed through the amalgamation of oceanic plateaus and continental fragments. However, mechanisms responsible for terrane accretion remain poorly understood. We have therefore analysed the interactions of oceanic plateaus with the leading edge of the continental margin using a thermomechanical ...
Vogt Katharina, Gerya Taras
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Geochemical features of intraplate oceanic plateau basalts

Geological Society, London, Special Publications, 1989
Summary Coeval with the Cretaceous thermal uplift of a large region of the ‘old Pacific’ oceanic lithosphere was the widespread development of two expressions of intraplate volcanism: edifice building (ocean islands, seamounts) and submarine sheet-flows (oceanic plateaux).
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