Geochemistry, Geophysics, Geosystems

  1. Regular Articles

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    2. Regular Articles
    3. Research Articles
    1. You have free access to this content
      Tectonic uplift mechanism of the Goodenough and Fergusson Island gneiss domes, eastern Papua New Guinea: Constraints from seismic reflection and well data (pages 3969–3995)

      Guy Fitz and Paul Mann

      Version of Record online: 2 OCT 2013 | DOI: 10.1002/ggge.20208

      Key Points

      • A lack of regional upper crustal extension accompanied gneiss dome exhumation
      • The Owen-Stanley fault is the plate boundary in eastern Papua New Guinea
      • Vertical exhumation of post-orogenic lower crust involved far-field extension
  2. Research Articles

    1. Top of page
    2. Regular Articles
    3. Research Articles
    1. Crust and upper mantle structure associated with extension in the Woodlark Rift, Papua New Guinea from Rayleigh-wave tomography (pages 3808–3824)

      Ge Jin, James B. Gaherty, Geoffery A. Abers, Younghee Kim, Zachary Eilon and W. Roger Buck

      Version of Record online: 2 NOV 2015 | DOI: 10.1002/2015GC005840

      Key Points:

      • 3-D shear-velocity structure of the Woodlark Rift, PNG is retrieved
      • We observed a localized upper-mantle extension along the Woodlark Rift axis
      • Partial melt and/or felsic rocks may exist in the mantle west of DI
    2. Eduction, extension, and exhumation of ultrahigh-pressure rocks in metamorphic core complexes due to subduction initiation (pages 2564–2581)

      Kenni Dinesen Petersen and W. Roger Buck

      Version of Record online: 14 AUG 2015 | DOI: 10.1002/2015GC005847

      Key Points:

      • Eduction and extension can occur in a region of general plate convergence
      • Rapid eduction can be facilitated by nearby subduction initiation
      • UHP exhumation in the Woodlark Basin can be explained by eduction
    3. Imaging continental breakup using teleseismic body waves: The Woodlark Rift, Papua New Guinea (pages 2529–2548)

      Zachary Eilon, Geoffrey A Abers, James B Gaherty and Ge Jin

      Version of Record online: 7 AUG 2015 | DOI: 10.1002/2015GC005835

      Key Points:

      • Body wave inversion for mantle structure within highly extended continental rift
      • Slow, narrow rift axis demonstrates mantle extension ahead of seafloor breakup
      • Well-constrained thermal contrast between rift and fast seismogenic structure
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      Paleomagnetic evidence for vertical-axis rotations of crustal blocks in the Woodlark Rift, SEPapua New Guinea: Miocene to present-day kinematics in one of the world's most rapidly extending plate boundary zones (pages 2058–2081)

      Elizabeth A. Cairns, Timothy A. Little, Gillian M. Turner, Laura M. Wallace and Susan Ellis

      Version of Record online: 3 JUL 2015 | DOI: 10.1002/2015GC005788

      Key Points:

      • Woodlark Microplate rotation began earlier than previously thought
      • Current kinematics in the Woodlark Rift are expressive of longer-term plate motions
      • We propose a previously unmapped dextral transfer fault in SE Papua New Guinea
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      Late Miocene to Recent formation of the Aure-Moresby fold-thrust belt and foreland basin as a consequence of Woodlark microplate rotation, Papua New Guinea (pages 1988–2004)

      Bryan Ott and Paul Mann

      Version of Record online: 30 JUN 2015 | DOI: 10.1002/2014GC005668

      Key Point:

      • Rotation of Woodlark microplate produces the late Miocene Aure-Moresby foreland basin
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      Contrasting styles of (U)HP rock exhumation along the Cenozoic Adria-Europe plate boundary (Western Alps, Calabria, Corsica) (pages 1786–1824)

      Marco G. Malusà, Claudio Faccenna, Suzanne L. Baldwin, Paul G. Fitzgerald, Federico Rossetti, Maria Laura Balestrieri, Martin Danišík, Alessandro Ellero, Giuseppe Ottria and Claudia Piromallo

      Version of Record online: 15 JUN 2015 | DOI: 10.1002/2015GC005767

      Key Points:

      • A specific geologic record for each different exhumation mechanism
      • An integrated tectonic reconstruction for the Alpine and Apenninic subductions
      • Synconvergent exhumation models are not consistent with Mediterranean geology
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      Continental breakup and UHP rock exhumation in action: GPS results from the Woodlark Rift, Papua New Guinea (pages 4267–4290)

      Laura M. Wallace, Susan Ellis, Tim Little, Paul Tregoning, Neville Palmer, Robert Rosa, Richard Stanaway, John Oa, Edwin Nidkombu and John Kwazi

      Version of Record online: 11 NOV 2014 | DOI: 10.1002/2014GC005458

      Key Points

      • GPS reveals crustal deformation and microplate kinematics in the Woodlark Basin, SE Papua New Guinea
      • Exhumation of UHP rocks in southeastern PNG is associated with active crustal extension
      • Our results demonstrate that low-angle normal faults can slip at rates of several mm/yr or more
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      The Early-Middle Miocene subduction complex of the Louisiade Archipelago, southern margin of the Woodlark Rift (pages 4024–4046)

      Laura E. Webb, Suzanne L. Baldwin and Paul G. Fitzgerald

      Version of Record online: 24 OCT 2014 | DOI: 10.1002/2014GC005500

      Key Points

      • Miocene accretionary complex formed above a north dipping subduction zone
      • Accretionary wedge is crosscut by ∼12 Ma rift-related volcanic sills and dikes
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      Tracking the exhumation of a Pliocene (U)HP terrane: U-Pb and trace-element constraints from zircon, D'Entrecasteaux Islands, Papua New Guinea (pages 3945–3964)

      Joel W. DesOrmeau, Stacia M. Gordon, Timothy A. Little and Samuel A. Bowring

      Version of Record online: 23 OCT 2014 | DOI: 10.1002/2014GC005396

      Key Points

      • Zircon geochronology and trace-element data record the exhumation of the PNG (U)HP terrane
      • Melt began to crystallize ∼0.75 m.y. after (U)HP metamorphism
      • Exhumation of the terrane occurred over a ∼3 m.y. interval
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      Zircon growth in (U)HP quartzo-feldspathic host gneisses exhumed in the Woodlark Rift of Papua New Guinea (pages 1258–1282)

      N. A. Zirakparvar, S. L. Baldwin and A. K. Schmitt

      Version of Record online: 25 APR 2014 | DOI: 10.1002/2013GC004964

      Key Points

      • Zircon grows in host gneiss over a wide range of conditions
      • SIMS depth profiling reveals um scale geochemical heterogeneity
      • The rates of processes in the PNG (U)HP terrane are similar to the Western Alps
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      Anisotropy beneath a highly extended continental rift (pages 545–564)

      Zachary Eilon, Geoffrey A. Abers, Ge Jin and James B. Gaherty

      Version of Record online: 1 MAR 2014 | DOI: 10.1002/2013GC005092

      Key Points

      • SK(K)S splitting results from the Woodlark Rift, Papua New Guinea
      • Majority of fast axes indicate spreading-parallel anisotropic fabric
      • Quantitative link between shear in asthenospheric mantle and splitting magnitude
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      Variation of Ti-in-quartz in gneiss domes exposing the world's youngest ultrahigh-pressure rocks, D'Entrecasteaux Islands, Papua New Guinea

      Megan Korchinski, Timothy A. Little, Euan Smith and Marc-Alban Millet

      Version of Record online: 3 OCT 2012 | DOI: 10.1029/2012GC004230

      Key Points

      • Gradients in Ti content in quartz used to constrain cooling rates
      • D'Entrecasteaux Island gneiss domes emplaced in crust as symmetrical diapirs
      • Ti content in quartz is related to final crustal emplacement of domes