Havre Trough
E191554
Havre Trough is a back-arc basin and seafloor spreading center located between the Kermadec volcanic arc and the Colville Ridge in the southwest Pacific.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Havre Trough canonical | 4 |
| back-arc Havre Trough | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1694916 — 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: Havre Trough Context triple: [southwest Pacific Ocean, contains, Havre Trough]
-
A.
Sigsbee Deep
Sigsbee Deep is the deepest part of the Gulf of Mexico, known as an abyssal plain reaching depths of over 3,700 meters (about 12,100 feet).
-
B.
Romanche Trench
The Romanche Trench is a deep submarine trench in the equatorial Atlantic Ocean formed by the Romanche Fracture Zone, marking one of the major offsets of the Mid-Atlantic Ridge.
-
C.
Norwegian Trench
The Norwegian Trench is a deep submarine valley off the coast of Norway, notable for its steep sides and significant depth compared to the surrounding seabed.
-
D.
Cayman Trough
The Cayman Trough is a deep undersea trench and tectonic plate boundary in the western Caribbean, known as the deepest point in the Caribbean Sea.
-
E.
Parece Vela Basin
Parece Vela Basin is an oceanic basin in the western Pacific Ocean associated with the Philippine Sea Plate and known for its complex tectonic and volcanic features.
- 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: Havre Trough Target entity description: Havre Trough is a back-arc basin and seafloor spreading center located between the Kermadec volcanic arc and the Colville Ridge in the southwest Pacific.
-
A.
Sigsbee Deep
Sigsbee Deep is the deepest part of the Gulf of Mexico, known as an abyssal plain reaching depths of over 3,700 meters (about 12,100 feet).
-
B.
Romanche Trench
The Romanche Trench is a deep submarine trench in the equatorial Atlantic Ocean formed by the Romanche Fracture Zone, marking one of the major offsets of the Mid-Atlantic Ridge.
-
C.
Norwegian Trench
The Norwegian Trench is a deep submarine valley off the coast of Norway, notable for its steep sides and significant depth compared to the surrounding seabed.
-
D.
Cayman Trough
The Cayman Trough is a deep undersea trench and tectonic plate boundary in the western Caribbean, known as the deepest point in the Caribbean Sea.
-
E.
Parece Vela Basin
Parece Vela Basin is an oceanic basin in the western Pacific Ocean associated with the Philippine Sea Plate and known for its complex tectonic and volcanic features.
- F. None of above. chosen
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf |
back-arc basin
ⓘ
seafloor spreading center ⓘ |
| adjacentTo |
Colville Ridge back-arc remnant arc
ⓘ
Tonga–Kermadec Arc ⓘ
surface form:
Kermadec Ridge
|
| associatedWith |
Kermadec Trench
ⓘ
Tonga–Kermadec Arc ⓘ
surface form:
Kermadec volcanic arc
|
| boundedBy |
Colville Ridge to the west
ⓘ
Kermadec volcanic arc to the east ⓘ |
| contains |
back-arc spreading centers
ⓘ
rift basins ⓘ volcanic centers ⓘ |
| countryOffshoreFrom | New Zealand ⓘ |
| crustType | oceanic crust ⓘ |
| formedBy |
rollback of the subducting Pacific Plate
ⓘ
subduction-related extension ⓘ |
| geologicalAge | Cenozoic ⓘ |
| geologicalAgeDetail | Miocene to Recent ⓘ |
| hasFeature |
extensional faulting
ⓘ
rifted crust ⓘ spreading segments ⓘ |
| locatedBetween |
Colville Ridge
ⓘ
Tonga–Kermadec Arc ⓘ
surface form:
Kermadec volcanic arc
|
| locatedIn | southwest Pacific Ocean ⓘ |
| ocean | Pacific Ocean ⓘ |
| overlies | subducting Pacific Plate ⓘ |
| partOf |
Tonga-Kermadec subduction system
ⓘ
surface form:
Kermadec-Havre-Tonga subduction system
|
| region | southwest Pacific back-arc province ⓘ |
| relatedProcess |
arc magmatism
ⓘ
hydrothermal activity ⓘ seafloor volcanism ⓘ |
| researchField |
marine geology
ⓘ
plate tectonics ⓘ volcanology ⓘ |
| spreadingType |
back-arc spreading
ⓘ
slow to intermediate spreading ⓘ |
| tectonicPlateBoundary |
Australian Plate
ⓘ
Pacific Plate ⓘ |
| tectonicSetting | back-arc region of the Pacific Plate–Australian Plate boundary ⓘ |
| trend | north-northeast–south-southwest ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Havre Trough Description of subject: Havre Trough is a back-arc basin and seafloor spreading center located between the Kermadec volcanic arc and the Colville Ridge in the southwest Pacific.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
back-arc Havre Trough