Peru–Chile Trench region

E9668

oceanic trench system subduction zone tectonic plate boundary region

The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.

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All labels observed (11)

Label	Occurrences
Peru–Chile Trench	2
Peru–Chile Trench region canonical	2
Nazca Plate–South American Plate subduction zone	1
Nazca subduction zone	1
Nazca-South America plate margin	1
Nazca–South America plate boundary	1
Nazca–South America subduction zone	1
Peru–Chile Trench system	1
Peru–Chile coastal margin	1
Peru–Chile megathrust	1
Peru–Chile megathrust fault	1

How this entity was disambiguated

This entity first appeared as the object of triple T29540 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Peru–Chile Trench region
Context triple: [Pacific Ring of Fire, contains, Peru–Chile Trench region]

A. Puerto Rico Trench
The Puerto Rico Trench is a deep oceanic trench in the western Atlantic, marking the boundary between the Caribbean and North American tectonic plates and containing the region’s greatest ocean depths.
B. Tonga Trench
The Tonga Trench is one of the deepest oceanic trenches on Earth, located in the southwestern Pacific and formed by the subduction of the Pacific Plate beneath the Indo-Australian Plate.
C. Nazca Plate
The Nazca Plate is an oceanic tectonic plate in the southeastern Pacific that subducts beneath the South American Plate, driving Andean mountain building and frequent earthquakes and volcanism along the western coast of South America.
D. Central Volcanic Zone of the Andes
The Central Volcanic Zone of the Andes is a major segment of the Andean volcanic chain characterized by numerous high stratovolcanoes and extensive volcanic plateaus spanning parts of Chile, Bolivia, Argentina, and Peru.
E. northern Chile
Northern Chile is an arid, sparsely populated macro-region of Chile known for the Atacama Desert, rich mineral resources, and clear skies ideal for astronomical observatories.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Peru–Chile Trench region
Target entity description: The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.

A. Puerto Rico Trench
The Puerto Rico Trench is a deep oceanic trench in the western Atlantic, marking the boundary between the Caribbean and North American tectonic plates and containing the region’s greatest ocean depths.
B. Tonga Trench
The Tonga Trench is one of the deepest oceanic trenches on Earth, located in the southwestern Pacific and formed by the subduction of the Pacific Plate beneath the Indo-Australian Plate.
C. Nazca Plate
The Nazca Plate is an oceanic tectonic plate in the southeastern Pacific that subducts beneath the South American Plate, driving Andean mountain building and frequent earthquakes and volcanism along the western coast of South America.
D. Central Volcanic Zone of the Andes
The Central Volcanic Zone of the Andes is a major segment of the Andean volcanic chain characterized by numerous high stratovolcanoes and extensive volcanic plateaus spanning parts of Chile, Bolivia, Argentina, and Peru.
E. northern Chile
Northern Chile is an arid, sparsely populated macro-region of Chile known for the Atacama Desert, rich mineral resources, and clear skies ideal for astronomical observatories.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	oceanic trench system ⓘ subduction zone ⓘ tectonic plate boundary region ⓘ
associatedWith	Andean orogeny ⓘ Benioff seismic zone beneath South America ⓘ linked to: Andean subduction system Peru–Chile megathrust fault ⓘ linked to: Peru–Chile Trench region historic great earthquakes ⓘ seismic hazard in Chile ⓘ seismic hazard in Peru ⓘ
characterizedBy	active volcanism in the Andes ⓘ deep ocean trench ⓘ frequent earthquakes ⓘ megathrust earthquakes ⓘ tsunami generation ⓘ
drives	crustal shortening in the Andes ⓘ magmatism beneath the Andean arc ⓘ
extendsAlong	offshore Peru ⓘ offshore central Chile ⓘ offshore northern Chile ⓘ western margin of South America ⓘ
geologicalAge	Cenozoic activity ⓘ
geologicalProcess	oceanic–continental subduction ⓘ
hazardType	earthquake zone ⓘ tsunami source region ⓘ
influences	Andean volcanic arc ⓘ linked to: Andean Volcanic Belt tectonic uplift of western South America ⓘ topography of the Andes ⓘ
knownFor	high seismicity ⓘ large subduction earthquakes ⓘ major tsunamis ⓘ
locatedIn	eastern Pacific Ocean ⓘ
locatedOffCoastOf	Chile ⓘ Peru ⓘ South America ⓘ
maximumDepth	over 26000 ft ⓘ over 8000 m ⓘ
oceanBasin	Southeast Pacific Ocean ⓘ linked to: Southeastern Pacific Ocean
overridingPlate	South American Plate ⓘ
partOf	Nazca–South America plate boundary ⓘ linked to: Peru–Chile Trench region Pacific Ring of Fire ⓘ
plateConvergenceType	oceanic plate subducting beneath continental plate ⓘ
relatedTo	Andes Mountains ⓘ linked to: Andes Peru–Chile Trench ⓘ linked to: Atacama Trench
researchField	marine geology ⓘ plate tectonics ⓘ seismology ⓘ
roleIn	Andean mountain building ⓘ
subductingPlate	Nazca Plate ⓘ
tectonicSetting	convergent plate boundary ⓘ

How these facts were elicited

Referenced by (13)

Full triples — surface form annotated when it differs from this entity's canonical label.

Pacific Ring of Fire → contains → Peru–Chile Trench region ⓘ

Ring of Fire → contains → Peru–Chile Trench region ⓘ

Nazca Plate → subductionZoneName → Peru–Chile Trench ⓘ