Tyrrhenian back-arc basin system
E557622
The Tyrrhenian back-arc basin system is a tectonically active region in the western Mediterranean characterized by seafloor spreading, extensional processes, and associated volcanic activity behind the Apennine subduction zone.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Apennine subduction system | 1 |
| Mediterranean back-arc basins | 1 |
| Southern Tyrrhenian back-arc basin | 1 |
| Tyrrhenian back-arc basin | 1 |
| Tyrrhenian back-arc basin system canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5947911 — 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: Tyrrhenian back-arc basin system Context triple: [Marsili Basin, partOf, Tyrrhenian back-arc basin system]
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A.
Aegean back-arc extension
Aegean back-arc extension is a tectonic process in the Aegean region characterized by crustal stretching and thinning behind the Hellenic subduction zone, leading to widespread normal faulting and basin formation.
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B.
Andean back-arc basins
Andean back-arc basins are sedimentary basins that formed behind the Andean volcanic arc due to tectonic extension and subsidence related to subduction along the western margin of South America.
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C.
Hellenic subduction system
The Hellenic subduction system is a major convergent plate boundary in the eastern Mediterranean where the African Plate is being subducted beneath the Aegean microplate, creating deep-sea trenches, intense seismicity, and active volcanism.
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D.
East Pacific tectonic system
The East Pacific tectonic system is a major geological region in the eastern Pacific Ocean characterized by active seafloor spreading, transform faults, and subduction zones that shape the surrounding oceanic plates and continental margins.
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E.
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.
- 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: Tyrrhenian back-arc basin system Target entity description: The Tyrrhenian back-arc basin system is a tectonically active region in the western Mediterranean characterized by seafloor spreading, extensional processes, and associated volcanic activity behind the Apennine subduction zone.
-
A.
Aegean back-arc extension
Aegean back-arc extension is a tectonic process in the Aegean region characterized by crustal stretching and thinning behind the Hellenic subduction zone, leading to widespread normal faulting and basin formation.
-
B.
Andean back-arc basins
Andean back-arc basins are sedimentary basins that formed behind the Andean volcanic arc due to tectonic extension and subsidence related to subduction along the western margin of South America.
-
C.
Hellenic subduction system
The Hellenic subduction system is a major convergent plate boundary in the eastern Mediterranean where the African Plate is being subducted beneath the Aegean microplate, creating deep-sea trenches, intense seismicity, and active volcanism.
-
D.
East Pacific tectonic system
The East Pacific tectonic system is a major geological region in the eastern Pacific Ocean characterized by active seafloor spreading, transform faults, and subduction zones that shape the surrounding oceanic plates and continental margins.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
back-arc basin system
ⓘ
geological structure ⓘ tectonic region ⓘ |
| activeDuring | Quaternary ⓘ |
| associatedProcess |
arc migration
ⓘ
lithospheric stretching ⓘ mantle upwelling ⓘ |
| associatedWith | Apennine subduction zone NERFINISHED ⓘ |
| boundedBy |
Apennine orogenic belt
NERFINISHED
ⓘ
Calabrian arc NERFINISHED ⓘ Corsica NERFINISHED ⓘ Sardinia NERFINISHED ⓘ |
| characterizedBy |
crustal thinning
ⓘ
extensional tectonics ⓘ normal faulting ⓘ seafloor spreading ⓘ volcanic activity ⓘ |
| contains |
Aeolian volcanic arc
NERFINISHED
ⓘ
Campanian volcanic province NERFINISHED ⓘ Marsili Basin NERFINISHED ⓘ Marsili Seamount NERFINISHED ⓘ Tyrrhenian Sea NERFINISHED ⓘ Vavilov Basin NERFINISHED ⓘ Vavilov Seamount NERFINISHED ⓘ submarine volcanic centers ⓘ |
| drivenBy |
rollback of the Apennine subduction zone
ⓘ
slab retreat ⓘ |
| geologicalAge | Cenozoic ⓘ |
| hasCrustType |
oceanic crust in central basins
ⓘ
thinned continental crust at margins ⓘ |
| linkedTo |
Apennine orogeny
NERFINISHED
ⓘ
Calabrian subduction zone NERFINISHED ⓘ |
| locatedIn |
Mediterranean Sea
ⓘ
western Mediterranean Sea NERFINISHED ⓘ |
| locatedWestOf | Apennine subduction zone NERFINISHED ⓘ |
| magmatismType |
alkaline
ⓘ
calc-alkaline ⓘ shoshonitic ⓘ |
| mainPhaseOfOpening | Neogene ⓘ |
| partOf | Mediterranean back-arc domain NERFINISHED ⓘ |
| shows |
active seismicity
ⓘ
high heat flow ⓘ magmatic differentiation ⓘ |
| studiedInDiscipline |
marine geology
ⓘ
tectonics ⓘ volcanology ⓘ |
| tectonicSetting |
back-arc extension
ⓘ
convergent margin ⓘ |
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: Tyrrhenian back-arc basin system Description of subject: The Tyrrhenian back-arc basin system is a tectonically active region in the western Mediterranean characterized by seafloor spreading, extensional processes, and associated volcanic activity behind the Apennine subduction zone.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Southern Tyrrhenian back-arc basin
this entity surface form:
Tyrrhenian back-arc basin
this entity surface form:
Mediterranean back-arc basins
this entity surface form:
Apennine subduction system