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Topic: Okhotsk Plate


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  Eurasian Plate - Encyclopedia, History, Geography and Biography
The Eurasian Plate is a tectonic plate covering Eurasia (a landmass consisting of the continents Europe and Asia) except that it does not cover the Indian subcontinent, the Arabian subcontinent, and the area east of the Verkhoyansk Range in East Siberia.
The easterly side is a boundary with the North American Plate to the north and a boundary with the Philippine Plate to the south, and possibly with the Okhotsk Plate and the Amurian Plate.
The southerly side is a boundary with the African Plate to the west, the Arabian Plate in the middle and the Indo-Australian Plate to the east.
www.arikah.com /encyclopedia/Eurasian_Plate   (167 words)

  
 Philippine Plate - Wikipedia, the free encyclopedia
The Philippine Plate is an oceanic tectonic plate beneath the Pacific Ocean to the east of the Philippines.
The Philippine Plate is bounded on the west by the Eurasian Plate, on the south partly by the Indo-Australian Plate, on the north by the North American Plate and possibly by the Amurian Plate, and on the northeast by the Okhotsk Plate.
The Philippine Plate, the Eurasian Plate (or the Amurian Plate), and the Okhotsk Plate meet at Mount Fuji.
en.wikipedia.org /wiki/Philippine_Plate   (137 words)

  
 IKIP: Island Info
Volcanic activity and uplift in the region of the Lesser Kuril Ridge intensified during the Paleocene and Eocene as the Kula-Pacific Ridge was subducted into the Kuril-Kamchatka Trench, and it was probably during this period that the Lesser Kuril Ridge emerged from the sea (Kimura and Tamaki, 1985).
During the hiatus of the late Eocene and Oligocene, the Okhotsk Plate was subsiding, and there is evidence that the Lesser Kuril Ridge may have been submerged during part of this period (Kimura and Tamaki, 1985).
Although the timing of the initial decoupling is uncertain, the southwestern migration of this plate culminated in the collision of the Lesser Kuril Ridge with the Eurasian plate in the late Miocene (Kimura and Tamaki, 1985; Kimura, 1986; Bazhenov and Burtman, 1994).
artedi.fish.washington.edu /okhotskia/ikip/Info/geohist.html   (1389 words)

  
 Hogar de los Planetarios Portatiles Mas que un Planetario Portatil   (Site not responding. Last check: 2007-10-13)
Plate motion is driven by the higher elevation of plates at mid-ocean ridges.
The African plate is bounded on the northeast by the Arabian Plate, the southeast by the Indo-Australian Plate, the north by the Eurasian Plate, and the south by the Antarctic Plate.
The Cocos Plate is bounded by divergent boundaries to the south with the Nazca Plate and to the west with the Pacific Plate.
www.planetarios.com /mundo-futuro.htm   (7817 words)

  
 [No title]
This unclear margin of the proposed Okhotsk plate may therefore be the result of the extrusion of parts of Asia by the collision of the Indian plate as proposed by Worral et al., (1996), and perhaps the lack of earthquakes in this area is due to high heat flow from crustal thinning.
Okhotsk plate is being extruded to the southeast, in a manner similar to the Anatolian plate between Eurasia and Arabia.
The primary test of a proposed plate model is whether the sense of motion at plate boundaries predicted by the relative angular velocity vector of the adjacent plates is consistent with seismic and tectonic evidence.
www.aeic.alaska.edu /input/hilary/hil2.html   (3841 words)

  
 Accretion tectonics and geodynamics of Kamchatka-Sakhalin region
The marine basin is bounded by the Kurile island arc to the south, by Kamchatka to the east, by the Asian continental margin to the north and northwest and Sakhalin and Hokkaido to the west.
Okhotsk massif, roughly triangular in outlines is exposed in northern part of region among terrigenous complexes of Mesozoides.
Omgon terrane is in westernmost Kamchatka, on the shore of Sea of Okhotsk.
geo.web.ru /users/GeoLIS/virtugeo/articles/tsukanov/articl.htm   (15516 words)

  
 Geology & Geophysics, 2002, V 43, N 2.
Its eastern and western boundaries are formed by right-lateral strike-slip faults; in the north, the plate is bounded by a Middle Cretaceous subduction zone, and the southern boundary is delineated by the ongoing subduction of the Pacific plate beneath Eurasia.
A volcanic uplift in the center of the Okhotsk plate is identified as the Okhotsk volcanic plateau.
It is hypothesized that the Okhotsk volcanic plateau formed north of the mid-ocean ridge, within the Kula plate, in response to the late Jurassic-early Cretaceous activity of a hot mantle plume in the region of the triple junction of the Kula, Pacific, and Faralon plates.
library.iem.ac.ru /geo-geop/2-4302.html   (1450 words)

  
 List of Tectonic Plates Encyclopedia Article @ Shuddered.net   (Site not responding. Last check: 2007-10-13)
Tectonic plates are pieces of the Earth's crust and uppermost mantle, together referred to as the lithosphere.
The composition of the two types of crust differs markedly, with basaltic rocks ("mafic") dominating oceanic crust, while continental crust consists principally of lower density granitic rocks ("felsic").
The surface of the Earth consists of 14 major plates and 38 minor ones, for a total of 52 plates.
www.shuddered.net /encyclopedia/List_of_tectonic_plates   (357 words)

  
 Active Tectonics of Northeast Asia: Using GPS Velocities and Block Modeling to Test Okhotsk Plate Motion Independent ...
The current plate kinematics of Northeast Asia are somewhat enigmatic due to subduction dominated deformation in the east and little to no differential plate motion in the west which results in diffuse and sparse seismicity.
However, it is important for defining the plate boundary geometry and constraining the relative motion of the major and minor plate in Northeast Asia and provides a rigorous framework for interpreting seismicity and the surface deformation observed by geodesy.
The plate-motion parameters of the Okhotsk plate are consistent with right-lateral motion in northern Sakhalin and contraction in southern Sakhalin, inferred from focal mechanism solutions.
seismo.berkeley.edu /annual_report/ar03_04/node25.html   (1046 words)

  
 uwnews.org | University of Washington News and Information
The North America plate extends through Alaska across the Bering Strait and into Siberia, but the question is whether it reaches as far south as Kamchatka.
The idea that the peninsula is part of the North America plate is perhaps a case of "tectonic imperialism" reinforced by a lack of evidence to the contrary, said Jody Bourgeois, UW Earth and space sciences professor who studies historic and prehistoric evidence of earthquakes and tsunamis.
All of those factors place pressure on the Okhotsk block and likely are responsible for the raised and tilted land the researchers found along the Kamchatka coast, Bourgeois said.
uwnews.org /uweek/uweekarticle.asp?articleID=24111   (821 words)

  
 An updated digital model of plate boundaries: PB2002
An orogen and several small plates east of SU are better represented in Figures 5 and 6, respectively.
The relatively steady slope of the PB2002 curve for plate areas between 0.002 and 1 steradian suggests a power law relationship between the number of plates and their minimum size.
Very large plates are limited in their area because of the finite area of the Earth, and perhaps also by mantle convection tractions.
element.ess.ucla.edu /publications/2003_PB2002/2003_PB2002.htm   (1405 words)

  
 gp41a in fm04
The northern boundary of the Okhotsk plate is separated from both North America and Eurasia by diffuse zones of seismicity in northeast Russia.
The eastern boundary of the Amur plate is generally accepted as lying along Sakhalin Island and bordering the Okhotsk plate.
One of the latter, Smaginsk oceanic plateau on the Kula plate was partly separated from this plate and attached to the Kronotsk accretionary prism.
www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=fm04&database=/data/epubs/wais/indexes/fm04/fm04&maxhits=200&="GP41A"   (9586 words)

  
 NE Russia Workshop
A similar local minimum of shear wave speed seems to lie along the western margin of the Sea of Okhotsk, in the baffling seismicity gap in the NW Sea of Okhotsk, which may be another patch of “deformable lithosphere.” Seismic reflection data, however, suggest that a band of faults crosses this region.
The geometry of plate tectonics requires that the boundary between the North American and Eurasian plates connect with the subduction zones in the northwest Pacific.
The Pacific plate is actively subducting under the east coast of Kamchatka, south of the Aleutian junction at Cape Kamchatka.
pangea.stanford.edu /research/structure/nerussia/projects_plate_boundary.html   (6274 words)

  
 The Earthquake and Tsunami of 26 May 1983 in the Sea of Japan - by Dr. George Pararas-Carayannis
Whether the Sea of Okhotsk and the northern Japanese islands are part of the North American plate or of a separate Okhotsk plate has not been determined.
The plate tectonics of the Southern Kuril islands-Northern Hokkaido region are quite complex and very different than those along the southern portion of the Japanese Trench.
The South Kuril Islands are part of the Kuril arc in the Okhotsk plate which has been colliding westward against the Northeast Japan arc, along the Hidaka Collision Zone (HCZ), where new continental crust is created by active arc-arc collision.
www.drgeorgepc.com /Tsunami1983Japan.html   (2291 words)

  
 Colorado Plateau Field Institute - Current Events
The preliminary location and focal-mechanism of this earthquake imply that it occurred as the result of thrust-faulting on the plate interface between the overriding Okhotsk plate and the subducting Pacific plate.
The Pacific plate is moving northwest at a rate of about 8 cm per year relative to the Okhotsk plate.
At first, the plate subducts at an extremely low angle than when it reaches a depth of about 30 km the angle of subduction steepens to about 30 degrees.
www.cpfieldinstitute.org /k12_event_show.php?event_id=144   (328 words)

  
 Department of Geological Sciences, WCAS, Northwestern University
Seth Stein, postdoctoral fellow Giovanni Sella, students, and coworkers are engaged in efforts to understand how global plate motions over geologic time (millions of years) compare with those over a few years measured from space geodesy, and exploring these data's implications for the evolution of the continents.
Before this, geologists could only study the motion of the great plates of Earth's lithosphere (which move at speeds of a few inches per year, about the speed fingernails grow) over periods of millions of years, long enough for large motions to accumulate.
The profile extends from the stable interior of the oceanic Nazca plate, across the Peru-Chile trench to the coastal forearc, across the high Altiplano and foreland thrust belt, and into the stable interior of the South American continent.
www.earth.northwestern.edu /research/area9.html   (690 words)

  
 Prospecting for Jurassic slabs
The geodynamic model accounts for thermal convection beneath surface plates whose motions are derived from plate tectonic reconstructions for the past 120 million years.
Large continents such as Eurasia are formed by collisions of smaller continental fragments, preceded by subduction of the intervening oceanic plate.
The Mongol-Okhotsk oceanic plate was consumed, and the Verkhoyansk Mountains were pushed up, as the continental blocks collided.
cas.bellarmine.edu /tietjen/images/prospecting_for_jurassic_slabs.htm   (1569 words)

  
 List of Tectonic Plates Encyclopedia Article @ Quivering.net   (Site not responding. Last check: 2007-10-13)
The plates are around 100 km (60 miles) thick and consist of two principal types of material: oceanic crust (also called sima from silicon and magnesium) and continental crust (sial from silicon and aluminium).
Some models identify more minor plates within current orogens.
Quivering.net is designed and maintained by Kurt Karr and is hosted by pair Networks.
www.quivering.net /encyclopedia/List_of_tectonic_plates   (357 words)

  
 Advisories: Russian Federation: Earthquake - Apr 2006, M=7.6 Koryakia, Russia Preliminary Earthquake Report   (Site not responding. Last check: 2007-10-13)
These are (1) the Okhotsk plate, which includes the Sea of Okhotsk, the Kamchatka Peninsula and northern Japan, and (2) the extreme northwestern margin of the North American plate.
Some evidence indicates that a third plate, the Bering plate, may be present and play a role in the regional tectonics, but this plate is poorly defined with uncertain boundaries.
Current models of plate interactions in northeastern Russia indicate that the region is being squeezed in a southeast-northwest direction, which causes shortening at a rate that might be only a few millimeters per year.
www.reliefweb.int /rw/RWB.NSF/db900SID/SODA-6P95GB?OpenDocument   (473 words)

  
 Earthquake and Tsunami of October 4, 1994 IN THE KURIL ISLANDS - Dr. George Pararas-Carayannis
Specifically, the October 4, 1994 earthquake (as the October 12, 1963 earthquake) ocurred at the Pacific side boundary of the Kuril arc (the South Kuril Islands) of the Okhotsk plate.
It ocurred at the Pacific side boundary of the Kuril arc (the South Kuril Islands) of the Okhotsk plate.
Structure and dynamics of the lithosphere and asthenosphere of the Okhotsk Sea region.
www.drgeorgepc.com /Tsunami1994RussiaKurils.html   (4285 words)

  
 index
In the past, some kinematic models for simulating plate subduction along the Japanese islands were mainly constrained by vertical deformation observed along the Japan subduction zone.
Future kinematic or mechanic models for simulating plate subduction along the Japanese islands should be able to account for the pattern of the horizontal deformation observed by GPS.
The model was constructed based on the geometry of the subducted slabs and the rates of the plate motion in the region.
www.geocities.com /subduction99   (2187 words)

  
 DELAMINATION-WEDGE-SUBDUCTION SYSTEM IN THE HIDAKA COLLISION ZONE (HCZ) OF ARC-ARC TYPE, HOKKAIDO, JAPAN: A FACTORY OF ...   (Site not responding. Last check: 2007-10-13)
The Kuril arc in the Okhotsk plate has been colliding westward against the Northeast Japan arc since Middle Miocene, forming the Hidaka collision zone (HCZ) of arc-arc type.
A series of deep seismic reflection studies have revealed the fundamental structures in the HCZ as follows: (1) The lower crust of the Kuril arc is delaminated at about 23 km deep.
(3) The Pacific plate is subducting northward beneath the structures mentioned in (1) and (2).
gsa.confex.com /gsa/2001AM/finalprogram/abstract_25103.htm   (425 words)

  
 EarthquakeAdvisor.com: Article: Deadly Series of Quakes hit Japan, October 23, 2004
The Islands of Japan lie on a ring of seismically active plate boundaries that surround the Pacific Ocean known as the Ring of Fire.
Earthquakes throughout Japan are caused by the relative motion of several major and minor tectonic plates including the Pacific plate, the Philippine Sea plate, the Okhotsk plate, and the Amur plate.
This thrust earthquake, of October 23rd 2004, occurred within the Okhotsk plate about 350 km east of the Japan Trench where the Pacific plate subducts beneath the overriding Okhotsk plate.
earthquakeadvisor.com /articles/00073.html?print=1   (423 words)

  
 Current deformation rates and extrusion of the northwestern Okhotsk plate, northeast Russia
Northeast Asia is a region of broad deformation resulting from the convergence of the Eurasian (EU) and North American (NA) plates.
Part of this convergence has been suggested to be relieved by the extrusion and deformation of the Okhotsk plate (OK).
Three models for the deformation of the seismically active northwestern corner of the Okhotsk plate, based on different modes of deformation partitioning, are calculated and compared to observations from GPS, seismicity, and geology.
www.agu.org /pubs/crossref/2006/2005GL024814.shtml   (288 words)

  
 ISTC - Sakhalin on the edge
It appears that the border of the Eurasian and the Sea of Okhotsk plates runs through Sakhalin, continuing into the Magadan Oblast.
Geologists believe that the mechanism of formation of the island of Sakhalin is the convergence of the Eurasian and the Sea of Okhotsk plates.
And if Japanese research into the island of Hokkaido is brought into the picture, then it becomes clear that the Sea of Okhotsk plate rotates in a counter-clockwise direction, at a speed of two centimetres a year.
www.istc.ru /istc/sc.nsf/news/science-news-sakhalin-edge.htm   (281 words)

  
 Untitled Document   (Site not responding. Last check: 2007-10-13)
Location of yhe INESSA study area (shaded) and recent plate geometry of the northwestern Pacific.
The Okhotsk plate corresponds to the Okhotsk Sea and parts of the adjacent land areas.
The plate boundary between Okhotsk and Amur plates goes along Sakhalin Island and represents dextral shear zone.
www.sgm.ru /rus/science/gbd/projects/komex/fig1.html   (66 words)

  
 nkysdb: SENO Tetsuzo
The 1983 Akita-oki Earthquake and its Implications for Plate Kinematics ?
Effects of relative plate motion on the deep structure and penetration depth of slabs below the Izu-Bonin and Mariana island arcs ?
Diffusion of crustal deformation from disturbances arising at plate boundaries - a case of the detachment beneath the Izu Peninsula, central Honshu, Japan - ?
staff.aist.go.jp /miyagi.iso14000/Works/Review/coop/0004/928.html   (847 words)

  
 Mount_Fuji - The real meaning from Timesharetalk wikipedia
At this time, a new crater, along with a second peak, named Hoei-zan after the era name, formed halfway down its side.
Fuji is located at the point where the Eurasian Plate (or the Amurian Plate), the Okhotsk Plate, and the Philippine Plate meet.
Those plates form the western part of Japan, the eastern part of Japan, and the Izu Peninsula respectively.
www.timesharetalk.co.uk /wiki.asp?k=Mount_Fuji   (1652 words)

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