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Nazca Plate and the South American Plate
Nazca Plate and the South American Plate
Published: 2014/01/15
Channel: MihaelaRodideal
Earthquakes & Tectonics of Western South America
Earthquakes & Tectonics of Western South America
Published: 2014/08/25
Channel: IRIS Earthquake Science
Nazca Plate
Nazca Plate
Published: 2016/08/31
Channel: WikiWikiup
The Nazca Plate
The Nazca Plate
Published: 2016/01/12
Channel: Julia Abramczyk
Nazca Plate Project
Nazca Plate Project
Published: 2017/04/10
Channel: Nate Spivey
Why has the Nazca plate slowed since the Neogene?
Why has the Nazca plate slowed since the Neogene?
Published: 2012/12/03
Channel: Javier Quinteros
Pop Up Book Nazca Plate Subduction Part 5
Pop Up Book Nazca Plate Subduction Part 5
Published: 2013/06/20
Channel: Rebecca Newburn
There is an increase possibility that an earthquake will hit the Korean peninsula
There is an increase possibility that an earthquake will hit the Korean peninsula
Published: 2016/04/18
Channel: ARIRANG NEWS
The Nazca Lines Mystery
The Nazca Lines Mystery
Published: 2007/09/30
Channel: Nanasna
Making a tree farm at Commandos base! with Nazca!
Making a tree farm at Commandos base! with Nazca!
Published: 2017/06/28
Channel: Nazca Gaming
Large scale Pacific Plate un-rest.... West Coast Earthquake coming?? 9/21/17
Large scale Pacific Plate un-rest.... West Coast Earthquake coming?? 9/21/17
Published: 2017/09/21
Channel: TheEarthMaster
Pop Up Book Nazca Plate Subduction Part 4
Pop Up Book Nazca Plate Subduction Part 4
Published: 2013/06/20
Channel: Rebecca Newburn
Farallon plate break up (wax model)
Farallon plate break up (wax model)
Published: 2013/01/25
Channel: Paul Stoddard
01 - Asian Tsunami - CBS News - 20041227
01 - Asian Tsunami - CBS News - 20041227
Published: 2008/10/24
Channel: asiantsunami51
5 Biggest Earthquakes Ever Recorded In The History
5 Biggest Earthquakes Ever Recorded In The History
Published: 2015/07/25
Channel: AmazingPlanet News
Nazca Plate
Nazca Plate
Published: 2017/04/20
Channel: Webber
Pop up Book Nazca Plate Subduction Part 3
Pop up Book Nazca Plate Subduction Part 3
Published: 2013/06/20
Channel: Rebecca Newburn
Nazca Plate
Nazca Plate
Published: 2016/03/26
Channel: Maree Elliott
Nazca Plate
Nazca Plate
Published: 2017/04/18
Channel: Char'mon Dickerson
Caribbean Plate
Caribbean Plate
Published: 2016/09/04
Channel: WikiWikiup
Nazca Plate
Nazca Plate
Published: 2016/03/26
Channel: Maree Elliott
Nazca Plate
Nazca Plate
Published: 2016/10/26
Channel: Angel Ríos
Nazca Plate Project
Nazca Plate Project
Published: 2016/01/12
Channel: Annaka Torrey
What is SOUTH AMERICAN PLATE? What does SOUTH AMERICAN PLATE mean? SOUTH AMERICAN PLATE meaning
What is SOUTH AMERICAN PLATE? What does SOUTH AMERICAN PLATE mean? SOUTH AMERICAN PLATE meaning
Published: 2017/02/21
Channel: The Audiopedia
Plate Tectonic Evolution of South America - Scotese Animation
Plate Tectonic Evolution of South America - Scotese Animation
Published: 2016/01/16
Channel: Christopher Scotese
Plate Tectonics | Nazca Group [G10-Rizal]
Plate Tectonics | Nazca Group [G10-Rizal]
Published: 2017/08/15
Channel: enaycii
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
Published: 2017/06/26
Channel: Nazca Gaming
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
Published: 2017/06/26
Channel: Nazca Gaming
Plate Tectonics Explained
Plate Tectonics Explained
Published: 2015/01/13
Channel: MinuteEarth
Tectonic Plate: Nazca
Tectonic Plate: Nazca
Published: 2011/11/08
Channel: Matthew Johnson
[SCIENCE] Plate Boundaries (Nazca Group)
[SCIENCE] Plate Boundaries (Nazca Group)
Published: 2017/08/17
Channel: xydo kim
A magnitude 7 8 earthquake in Ecuador "April 16, 2016"
A magnitude 7 8 earthquake in Ecuador "April 16, 2016"
Published: 2016/04/18
Channel: Geology Page
Ring of Fire Destructive Forces Surrounding the Pacific Ocean english documentary Part 3
Ring of Fire Destructive Forces Surrounding the Pacific Ocean english documentary Part 3
Published: 2013/11/19
Channel: Raul Guhrten
Facts about Earthquakes in Peru
Facts about Earthquakes in Peru
Published: 2014/11/28
Channel: National Self Reliance Association
What is ANTARCTIC PLATE? What does ANTARCTIC PLATE mean? ANTARCTIC PLATE meaning & explanation
What is ANTARCTIC PLATE? What does ANTARCTIC PLATE mean? ANTARCTIC PLATE meaning & explanation
Published: 2017/09/06
Channel: The Audiopedia
Divulgation & Vérité - Divulgation Totale de ce qui existe à Nazca !!
Divulgation & Vérité - Divulgation Totale de ce qui existe à Nazca !!
Published: 2017/06/26
Channel: ForcePingouin
Chile_EQuake_100227.mov
Chile_EQuake_100227.mov
Published: 2010/02/27
Channel: IRIS Teachable Moments
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
Published: 2017/06/27
Channel: Nazca Gaming
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
INTERESTING TITLE!!!!!!!!!!!!!!!!!/NAZCA AND COMMANDO!
Published: 2017/06/25
Channel: Nazca Gaming
What is NORTH AMERICAN PLATE? What does NORTH AMERICAN PLATE mean? NORTH AMERICAN PLATE meaning
What is NORTH AMERICAN PLATE? What does NORTH AMERICAN PLATE mean? NORTH AMERICAN PLATE meaning
Published: 2017/11/03
Channel: The Audiopedia
Galapagos Volunteer Experience, Formation of the Islands and volcanoes
Galapagos Volunteer Experience, Formation of the Islands and volcanoes
Published: 2010/03/15
Channel: AdventuresLead
12 Natural Wonders of South America
12 Natural Wonders of South America
Published: 2016/09/21
Channel: Talltanic
What is CARIBBEAN PLATE? What does CARRIBEAN PLATE mean? CARRIBEAN PLATE meaning & explanation
What is CARIBBEAN PLATE? What does CARRIBEAN PLATE mean? CARRIBEAN PLATE meaning & explanation
Published: 2017/09/15
Channel: The Audiopedia
What Are The Eight Minor Plates?
What Are The Eight Minor Plates?
Published: 2017/09/12
Channel: Question Force
Billy Meier - 222nd Contact 1/3
Billy Meier - 222nd Contact 1/3
Published: 2010/06/18
Channel: Sukofu
becoming savages!!!!!!!! nazca and commmando
becoming savages!!!!!!!! nazca and commmando
Published: 2017/06/25
Channel: Nazca Gaming
Farallon Plate
Farallon Plate
Published: 2016/09/04
Channel: WikiWikiup
FULL EPSIODE 04 Plate Tectonics - Understanding the Earth HD
FULL EPSIODE 04 Plate Tectonics - Understanding the Earth HD
Published: 2014/04/28
Channel: mineguy101
The Ring of Fire P1
The Ring of Fire P1
Published: 2010/04/25
Channel: Kurdistan Planetarium
Pop-up Book Nazca Part 1
Pop-up Book Nazca Part 1
Published: 2014/01/22
Channel: Rebecca Newburn
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WIKIPEDIA ARTICLE

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Nazca Plate
The Nazca Plate
Type Minor
Approximate area 15,600,000 km2[1]
Movement1 north-east
Speed1 40-53mm/year
Features Pacific Ocean
1Relative to the African Plate

The Nazca Plate, named after the Nazca region of southern Peru, is an oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America. The ongoing subduction, along the Peru–Chile Trench, of the Nazca Plate under the South American Plate is largely responsible for the Andean orogeny. The Nazca Plate is bounded on the west by the Pacific Plate and to the south by the Antarctic Plate through the East Pacific Rise and the Chile Rise respectively. The movement of the Nazca Plate over several hotspots has created some volcanic islands as well as east-west running seamount chains that subduct under South America. Nazca is a relatively young plate both in terms of the age of its rocks and its existence as an independent plate having been formed from the break-up of the Farallon Plate about 23 million years ago. The oldest rocks of the plate are about 50 million years old.[2]

Boundaries[edit]

East Pacific and Chile Rise[edit]

A triple junction, the Chile Triple Junction,[3] occurs on the seafloor of the Pacific Ocean off Taitao and Tres Montes Peninsula at the southern coast of Chile. Here three tectonic plates meet: the Nazca Plate, the South American Plate, and the Antarctic Plate.

Peru–Chile Trench[edit]

The eastern margin is a convergent boundary subduction zone under the South American Plate and the Andes Mountains, forming the Peru–Chile Trench. The southern side is a divergent boundary with the Antarctic Plate, the Chile Rise, where seafloor spreading permits magma to rise. The western side is a divergent boundary with the Pacific Plate, forming the East Pacific Rise. The northern side is a divergent boundary with the Cocos Plate, the Galapagos Rise.

The subduction of the Nazca plate under southern Chile has a history of producing massive earthquakes, including the largest ever recorded on earth, the moment magnitude 9.5 1960 Valdivia earthquake.

Intraplate features[edit]

Hotspots[edit]

A second triple junction occurs at the northwest corner of the plate where the Nazca, Cocos, and Pacific Plates all join off the coast of Colombia. Yet another triple junction occurs at the southwest corner at the intersection of the Nazca, Pacific, and Antarctic Plates off the coast of southern Chile. At each of these triple junctions an anomalous microplate exists, the Galapagos Microplate at the northern junction and the Juan Fernandez Microplate at the southern junction. The Easter Island Microplate is a third microplate that is located just north of the Juan Fernandez Microplate and lies just west of Easter Island.

Aseismic ridges[edit]

The Carnegie Ridge is a 1,350-km-long and up to 300-km-wide feature on the ocean floor of the northern Nazca Plate that includes the Galápagos archipelago at its western end. It is being subducted under South America with the rest of the Nazca Plate.

Fracture zones[edit]

The Darwin Gap is the area between the Nazca Plate and the coast of Chile, where Charles Darwin experienced the earthquake of 1835. It is expected that this area will be the epicenter of a major quake in the near future.[4]

Plate motion[edit]

The absolute motion of the Nazca Plate has been calibrated at 3.7 cm/yr east motion (88°), one of the fastest absolute motions of any tectonic plate. The subducting Nazca Plate, which exhibits unusual flat-slab subduction, is tearing as well as deforming as it is subducted (Barzangi and Isacks). The subduction has formed, and continues to form, the volcanic Andes Mountain Range. Deformation of the Nazca Plate even affects the geography of Bolivia, far to the east (Tinker et al.). The 1994 Bolivia earthquake occurred on the Nazca Plate; this had a magnitude of 8.2 , which at that time was the strongest instrumentally recorded earthquake occurring deeper than 300 km.

Aside from the Juan Fernández Islands, this area has very few other islands that are affected by the earthquakes that are a result of complicated movements at these junctions.

Geologic history[edit]

The precursor of both the Nazca Plate and the Cocos Plate (to its north) was the Farallon Plate, which split in the late Oligocene, about 22.8 Mya, a date arrived at by interpreting magnetic anomalies. Subduction under the South American continent began about 140 Mya, although the formation of the high parts of the Central Andes and the Bolivian orocline did not occur until 45 Mya. It has been suggested that the mountains were forced up by the subduction of the older and heavier parts of the plate, which sank more quickly into the mantle.[5]

See also[edit]

References[edit]

  1. ^ "Sizes of Tectonic or Lithospheric Plates". About.com Geology. Retrieved 4 January 2016. 
  2. ^ Dutch, Steven. "Sea Floor Spreading in the Pacific". 
  3. ^ Kelly McGuire (8 April 2004). "Tectonics of South America: Chile Triple Junction" (PDF). Retrieved 27 February 2016. 
  4. ^ Darwin Gap quake will shake Chile again [1], New Scientist, 30 Jan 2011, accessed 8 Feb 2011.
  5. ^ "Mountains on a plate form the Andes" (Issue No:214). University World News. 25 March 2012. Retrieved 8 February 2016. 
Bibliography

Coordinates: 14°49′44″S 74°56′37″W / 14.82889°S 74.94361°W / -14.82889; -74.94361

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