Results 211 to 220 of about 55,466 (230)
Some of the next articles are maybe not open access.
Accretion of oceanic plateaus at continental margins: Numerical modeling
Gondwana Research, 2020Abstract The accretion of oceanic plateaus has played a significant role in continental growth during Earth's history, which is evidenced by the presence of oceanic island basalts (OIB) and plume-type ophiolites in many modern orogens. However, oceanic plateaus can also be subducted into the deeper mantle, as revealed by seismic tomography.
Jianli Tao +10 more
openaire +1 more source
An immense shield volcano within the Shatsky Rise oceanic plateau, northwest Pacific Ocean
Nature Geoscience, 2013Most oceanic plateaux are massive basaltic volcanoes. However, the structure of these volcanoes, and how they erupt and evolve, is unclear, because they are remote and submerged beneath the oceans. Here we use multichannel seismic profiles and rock samples taken from Integrated Ocean Drilling Program core sites to analyse the structure of the Tamu ...
Sager, William W. +6 more
openaire +2 more sources
Influence of geometry and eclogitization on oceanic plateau subduction
Earth and Planetary Science Letters, 2013Abstract Subduction is driven by the negative buoyancy of the slab, which depends on both the temperature and composition of the lithospheric plate. In the case of subduction of an oceanic plateau, larger thickness of the lower-density crust and harzburgite layers can locally decrease the negative buoyancy available to drive subduction.
Pierre-André Arrial, Magali I. Billen
openaire +1 more source
How did the Largest Oceanic Plateau modify the Normal Oceanic Lithosphere?
The Ontong Java Plateau (OJP), formed around 120 Ma, represents a significant event in the Earth’s geologic history. It is the largest preserved Large Igneous Province (LIP) by volume on the Earth. The voluminous and rapid magmatism placed a thick 30-40 km crust on a normal oceanic lithosphere in submarine conditions.Ziqi Zhang, Tolulope Olugboji
openaire +1 more source
Oceanic plateau accretion for young oceanic plates: Geodynamics models of Siletzia
The Siletzia oceanic plateau was accreted to the western margin of North America in the Eocene, marking the most recent accretion event in this area and the formation of the modern Cascadia subduction zone. Siletzia formed on or near the spreading ridge of two oceanic plates, and its chemical composition shows that its origin is a mixture of mid-ocean ...Moritz Urban, Claire Currie
openaire +1 more source
Oceanic plateaus, the fragmentation of continents, and mountain building
Journal of Geophysical Research: Solid Earth, 1982Many anomalous rises in today's oceans may be submerged continental fragments detached from previous continents, ancient island arcs, or basaltic piles formed by hot spots and spreading centers. These rises are embedded in their respective moving oceanic plates and are fated to be consumed at active margins.
Amos Nur, Zvi Ben‐Avraham
openaire +1 more source
Accreted Eclogites with Oceanic Plateau Basalt Affinities in Ecuador
Mineralogical Magazine, 1998High-pressure, regionally-metamorphosed rocks (the Raspas Formation) outcrop extensively (more than 10 km long and 3 km wide) within a terrane including extensively serpentinized harzburgite in E 1 0 r o Province, Ecuador. The high-pressure rocks consist of pelitic schists, eclogite, eclogite amphibolite and mafic rocks retrograded into amphibolites ...
openaire +1 more source
The single largest oceanic plateau: Ontong Java–Manihiki–Hikurangi
Earth and Planetary Science Letters, 2006Abstract Oceanic plateaus are mafic igneous provinces commonly thought to derive from ascending mantle plumes. By far the largest, the Ontong Java Plateau (OJP) was emplaced ca. 120 Ma, with a much smaller magmatic pulse of ca. 90 Ma. Of similar age and composition, the Manihiki and Hikurangi Plateaus (MP and HP) are separated from the OJP by ocean ...
openaire +1 more source
Subducted oceanic plateau fed crustal growth: Insights from Amdo dacites in central Tibetan Plateau
Lithos, 2022Haiyan Fan +14 more
openaire +1 more source