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Evidence for active subduction at the New Guinea Trench

Tregoning, Paul; Gorbatov, A.

Description

Recent seismic tomography imaging shows clear evidence for southwestward subduction along the entire length of the New Guinea Trench (NGT) in Indonesia and Papua New Guinea. Viewed in conjunction with the occurrence of large (Mw > 7) thrust earthquakes that are known to have occurred on the trench, this confirms conclusions of earlier studies that the NGT is an active, inter-plate boundary. The ∼650 km long slab is visible to a depth of about 300 km and subducts with a dip angle that varies...[Show more]

dc.contributor.authorTregoning, Paul
dc.contributor.authorGorbatov, A.
dc.date.accessioned2015-12-13T22:50:16Z
dc.date.available2015-12-13T22:50:16Z
dc.identifier.issn0094-8276
dc.identifier.urihttp://hdl.handle.net/1885/80717
dc.description.abstractRecent seismic tomography imaging shows clear evidence for southwestward subduction along the entire length of the New Guinea Trench (NGT) in Indonesia and Papua New Guinea. Viewed in conjunction with the occurrence of large (Mw > 7) thrust earthquakes that are known to have occurred on the trench, this confirms conclusions of earlier studies that the NGT is an active, inter-plate boundary. The ∼650 km long slab is visible to a depth of about 300 km and subducts with a dip angle that varies from ∼30° at 136°E to ∼10° at 143°E. The improved clarity of the seismic tomography in this region stems from the use of a more accurate data set of P- and S-wave arrival times and hypocentral locations.
dc.publisherAmerican Geophysical Union
dc.sourceGeophysical Research Letters
dc.subjectKeywords: Data reduction; Earthquakes; Geophysics; Tomography; Inter-plate boundary; Seismic tomography; Subduction; Seismology; plate tectonics; seismic tomography; subduction zone; Asia; Eurasia; Malay Archipelago; New Guinea; Southeast Asia
dc.titleEvidence for active subduction at the New Guinea Trench
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume31
dc.date.issued2004
local.identifier.absfor040313 - Tectonics
local.identifier.absfor040407 - Seismology and Seismic Exploration
local.identifier.ariespublicationMigratedxPub8984
local.type.statusPublished Version
local.contributor.affiliationTregoning, Paul, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGorbatov, A., IFREE JAMSTEC Japan Agency for Marine-Earth Science and Technology
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage4 (L13608)
local.identifier.doi10.1029/2004GL020190
dc.date.updated2015-12-11T10:39:26Z
local.identifier.scopusID2-s2.0-4544269053
CollectionsANU Research Publications

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