Results 101 to 110 of about 187 (140)

Multiple-ScS probing of the Ontong-Java Plateau

Physics of the Earth and Planetary Interiors, 2003
Abstract We use multiple-ScS phases recorded at Pohnpei from a 1996 deep earthquake under the Solomon Islands to investigate the shear velocity and attenuation characteristics of the upper mantle under the Ontong-Java Plateau in the Western Equatorial Pacific.
B.M. Gomer, E.A. Okal
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The crustal structure of the Ontong Java and Manihiki oceanic plateaus

Journal of Geophysical Research: Solid Earth, 1979
Air gun‐sonobuoy precision echo recorder data acquired on the Ontong Java Plateau and the Manihiki High Plateau demonstrate that these features have upper crustal seismic velocity structures strikingly similar to those observed in deep ocean basins. Each of the crustal layers of the oceanic plateaus, however, tends to be proportionally thicker than its
D. M. Hussong, L. K. Wipperman, L. W. Kroenke   +2 more
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Late Cretaceous and Palaeogene palaeolatitudes of the Ontong Java Plateau

Nature, 1975
THE Pacific plate has undergone a substantial northward displacement during the late Mesozoic and the Cainozoic. Here we give additional documentation for such motion based on palaeomagnetic measurements of a sequence of sedimentary and basalt samples collected from middle Oligocene to Aptian sections of Deep Sea Drilling Project (DSDP) site 289 (ref ...
S. R. HAMMOND, L. W. KROENKE, F. THEYER, D. L. KEELING   +3 more
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Seismic wave speed structure of the Ontong Java Plateau

Earth and Planetary Science Letters, 2015
Abstract The Ontong Java Plateau (OJP) represents the result of a significant event in the Earth's geologic history. Limited geophysical and geochemical data, as well as the plateau's relative isolation in the Pacific ocean, have made interpretation of the modern day geologic structure and its 120 Ma formation history difficult.
Covellone, Brian M., Savage, Brian, Shen, Yang   +2 more
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A revised age for the Ontong Java Plateau

Goldschmidt2022 abstracts, 2022
Peter Davidson, Anthony Koppers
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Partial melting below the Ontong Java Plateau

Geological Society, London, Special Publications, 2004
Abstract Primary magma compositions for Kroenke-type basalts from the Ontong Java Plateau (OJP) have been estimated using a hybrid forward and universe model. For accumulated fractional melting of a fertile peridotite source, the primary magma had 16.8% MgO and lost 18% olivine by fractional crystallization to produce Kroenke-type basalts ...
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Deep-Sea Carbonates: Dissolution and Mass Wasting on Ontong-Java Plateau

Science, 1976
Seismic reflection profiles and the structure of sediments in box cores from Ontong-Java Plateau indicate large-scale land sliding and sediment flow processes, respectively. The topographic morphology of sliding and slumping is depth-dependent, suggesting control by dissolution processes.
W H, Berger, T C, Johnson
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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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Rapid Formation of Ontong Java Plateau by Aptian Mantle Plume Volcanism

Science, 1991
The timing of flood basalt volcanism associated with formation of the Ontong Java Plateau (OJP) is estimated from paleomagnetic and paleontologic data. Much of OJP formed rapidly in less than 3 million years during the early Aptian, at the beginning of the Cretaceous Normal Polarity Superchron.
J A, Tarduno, W V, Sliter, L, Kroenke, M, Leckie, H, Mayer, J J, Mahoney, R, Musgrave, M, Storey, E L, Winterer   +8 more
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Why did not the Ontong Java Plateau form subaerially?

Earth and Planetary Science Letters, 2005
Abstract A recent drilling leg on the Ontong Java Plateau and subsequent studies have consolidated the following observation for this gigantic oceanic plateau: The bulk of the plateau was formed at ∼ 120 Ma in a submarine environment. This rapid construction of a massive igneous body below sea level is impossible to explain with the popular plume ...
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