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  Continental Break‐Up Under a Convergent Setting: Insights From P Wave Radial Anisotropy Tomography of the Woodlark Rift in Papua New Guinea

Yu, Y., Tilmann, F., Zhao, D., Gao, S. S., Liu, K. H. (2022): Continental Break‐Up Under a Convergent Setting: Insights From P Wave Radial Anisotropy Tomography of the Woodlark Rift in Papua New Guinea. - Geophysical Research Letters, 49, 5, e2022GL098086.
https://doi.org/10.1029/2022GL098086

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 Urheber:
Yu, Youqiang1, Autor              
Tilmann, Frederik1, Autor              
Zhao, Dapeng2, Autor
Gao, Stephen S.2, Autor
Liu, Kelly H.2, Autor
Affiliations:
12.4 Seismology, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_30023              
2External Organizations, ou_persistent22              

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Schlagwörter: DEAL Wiley
 Zusammenfassung: To explore the dynamic mechanism of continental rifting within a convergent setting, we determine the first P wave radial anisotropic tomography beneath the Woodlark rift in southeastern Papua New Guinea, which develops within the obliquely colliding zone between the Australian and southwest Pacific plates. The rift zone is depicted as localized low-velocity anomalies with positive radial anisotropy, which rules out a dominant role of active mantle upwelling in promoting the rift development and favors passive rifting with decompression melting as main processes. Downwelling slab relics in the upper mantle bounding the rift zone are revealed based on observed high-velocity anomalies and negative radial anisotropy, which may contribute to the ultra-high pressure rock exhumations and rift initiation. Our observations thus indicate that the Woodlark rift follows a passive model and is mainly driven by slab pull from the northward subduction of the Solomon plate.

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 Datum: 2022-03-092022
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: DOI: 10.1029/2022GL098086
GFZPOF: p4 T3 Restless Earth
OATYPE: Hybrid - DEAL Wiley
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Titel: Geophysical Research Letters
Genre der Quelle: Zeitschrift, SCI, Scopus, ab 2023 oa
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 49 (5) Artikelnummer: e2022GL098086 Start- / Endseite: - Identifikator: ISSN: 1944-8007
ISSN: 0094-8276
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals182
Publisher: American Geophysical Union (AGU)