back-arc Lau Basin
E237726
The back-arc Lau Basin is an actively spreading oceanic basin in the southwest Pacific formed behind the Tonga-Kermadec subduction zone, notable for its intense volcanism and hydrothermal activity.
All labels observed (1)
| Label | Occurrences |
|---|---|
| back-arc Lau Basin canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2120797 — 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: back-arc Lau Basin Context triple: [Tonga-Kermadec subduction system, associatedWith, back-arc Lau Basin]
-
A.
Ryukyu back-arc basin
The Ryukyu back-arc basin is a seafloor spreading region behind the Ryukyu island arc, formed by the subduction of the Philippine Sea Plate beneath the Eurasian Plate and characterized by active tectonism and volcanism.
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B.
Timor Trough
Timor Trough is a deep oceanic trench south of the island of Timor that marks a major tectonic boundary between the Australian and Eurasian plates.
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C.
Sunda Trench
The Sunda Trench is a deep oceanic trench in the eastern Indian Ocean off the coasts of Sumatra and Java, formed by the subduction of the Indo-Australian Plate beneath the Eurasian Plate.
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D.
Fiji Basin
The Fiji Basin is a deep oceanic basin in the South Pacific characterized by complex seafloor topography and active tectonic and volcanic processes.
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E.
New Britain Trench
The New Britain Trench is a deep oceanic trench near Papua New Guinea formed by the subduction of the Solomon Sea Plate beneath the South Bismarck Plate, making it one of the major deep-sea features of the southwestern Pacific.
- 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: back-arc Lau Basin Target entity description: The back-arc Lau Basin is an actively spreading oceanic basin in the southwest Pacific formed behind the Tonga-Kermadec subduction zone, notable for its intense volcanism and hydrothermal activity.
-
A.
Ryukyu back-arc basin
The Ryukyu back-arc basin is a seafloor spreading region behind the Ryukyu island arc, formed by the subduction of the Philippine Sea Plate beneath the Eurasian Plate and characterized by active tectonism and volcanism.
-
B.
Timor Trough
Timor Trough is a deep oceanic trench south of the island of Timor that marks a major tectonic boundary between the Australian and Eurasian plates.
-
C.
Sunda Trench
The Sunda Trench is a deep oceanic trench in the eastern Indian Ocean off the coasts of Sumatra and Java, formed by the subduction of the Indo-Australian Plate beneath the Eurasian Plate.
-
D.
Fiji Basin
The Fiji Basin is a deep oceanic basin in the South Pacific characterized by complex seafloor topography and active tectonic and volcanic processes.
-
E.
New Britain Trench
The New Britain Trench is a deep oceanic trench near Papua New Guinea formed by the subduction of the Solomon Sea Plate beneath the South Bismarck Plate, making it one of the major deep-sea features of the southwestern Pacific.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
back-arc basin
ⓘ
oceanic basin ⓘ |
| adjacentTo |
Kermadec Trench
ⓘ
Tonga Trench ⓘ |
| associatedWith |
Australian Plate
ⓘ
Pacific Plate ⓘ Tonga Plate ⓘ |
| boundedBy |
Tonga–Kermadec Arc
ⓘ
surface form:
Kermadec Ridge
Lau Ridge ⓘ Tonga Ridge ⓘ |
| formedBehind |
Tonga-Kermadec subduction system
ⓘ
surface form:
Tonga-Kermadec subduction zone
|
| formedBy | rollback of the Tonga-Kermadec subduction zone ⓘ |
| geologicalAge | Cenozoic ⓘ |
| hasActivity |
hydrothermal activity
ⓘ
intense volcanism ⓘ |
| hasBiologicalFeature | chemosynthetic vent communities ⓘ |
| hasCrustType | back-arc oceanic crust ⓘ |
| hasFeature |
back-arc volcanoes
ⓘ
hydrothermal vent fields ⓘ spreading centers ⓘ volcanic ridges ⓘ |
| hasGeologicalProcess |
back-arc spreading
ⓘ
subduction-related magmatism ⓘ |
| hasHydrothermalSystem |
high-temperature hydrothermal vents
ⓘ
sulfide-rich vent deposits ⓘ |
| hasMagmaSource |
depleted upper mantle
ⓘ
subduction-modified mantle wedge ⓘ |
| hasMorphology | complex network of spreading centers and transform faults ⓘ |
| hasSeafloorType | young oceanic crust ⓘ |
| hasTectonicActivity | active seafloor spreading ⓘ |
| hasVolcanismType |
arc-like volcanism
ⓘ
subduction-influenced MORB-like volcanism ⓘ |
| influences | geochemical cycles of sulfur and metals in the southwest Pacific ⓘ |
| isExampleOf |
active back-arc spreading system
ⓘ
subduction-related hydrothermal province ⓘ |
| isPartOf |
Tonga-Kermadec subduction system
ⓘ
surface form:
Tonga-Lau back-arc system
|
| locatedIn |
Pacific Ocean
ⓘ
southwest Pacific Ocean ⓘ |
| monitoredBy |
marine geophysical surveys
ⓘ
oceanographic expeditions ⓘ |
| researchInterest |
extremophile vent ecosystems
ⓘ
hydrothermal mineralization ⓘ subduction and back-arc spreading processes ⓘ |
| spreadingRate | one of the fastest back-arc spreading rates on Earth ⓘ |
| spreadingStyle | asymmetric back-arc spreading ⓘ |
| tectonicSetting | back-arc region of Tonga-Kermadec subduction system ⓘ |
| waterDepth | deep-sea basin ⓘ |
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: back-arc Lau Basin Description of subject: The back-arc Lau Basin is an actively spreading oceanic basin in the southwest Pacific formed behind the Tonga-Kermadec subduction zone, notable for its intense volcanism and hydrothermal activity.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.