Tyrrhenian back-arc basin system

E557622

back-arc basin system geological structure tectonic region

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.

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All labels observed (8)

Label	Occurrences
Tyrrhenian Sea back-arc basin	3
Apennine subduction system	2
Tyrrhenian back-arc basin	2
Apennine Mountains extensional fault system	1
Mediterranean back-arc basins	1
Southern Tyrrhenian back-arc basin	1
Tyrrhenian back-arc basin system canonical	1
Tyrrhenian back-arc opening	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]

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
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 ⓘ linked to: Apennine volcanic arc
boundedBy	Apennine orogenic belt ⓘ linked to: Apennines Calabrian arc ⓘ linked to: Calabrian Arc Corsica ⓘ Sardinia ⓘ
characterizedBy	crustal thinning ⓘ extensional tectonics ⓘ normal faulting ⓘ seafloor spreading ⓘ volcanic activity ⓘ
contains	Aeolian volcanic arc ⓘ Campanian volcanic province ⓘ linked to: Campanian volcanic arc Marsili Basin ⓘ Marsili Seamount ⓘ Tyrrhenian Sea ⓘ Vavilov Basin ⓘ Vavilov Seamount ⓘ 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 ⓘ Calabrian subduction zone ⓘ
locatedIn	Mediterranean Sea ⓘ western Mediterranean Sea ⓘ linked to: Western Mediterranean
locatedWestOf	Apennine subduction zone ⓘ linked to: Apennine volcanic arc
magmatismType	alkaline ⓘ calc-alkaline ⓘ shoshonitic ⓘ
mainPhaseOfOpening	Neogene ⓘ
partOf	Mediterranean back-arc domain ⓘ
shows	active seismicity ⓘ high heat flow ⓘ magmatic differentiation ⓘ
studiedInDiscipline	marine geology ⓘ tectonics ⓘ volcanology ⓘ
tectonicSetting	back-arc extension ⓘ convergent margin ⓘ

How these facts were elicited