Geochemistry, Geophysics, Geosystems

  1. Regular Articles

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    2. Regular Articles
    3. Research Articles
    1. 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

      Article first published 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. 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

      Article first published 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
    2. 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

      Article first published 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
    3. 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

      Article first published 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
    4. 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

      Article first published 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
    5. Anisotropy beneath a highly extended continental rift (pages 545–564)

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

      Article first published 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
    6. Contrasting styles of (U)HP rock exhumation along the Cenozoic Adria-Europe plate boundary (Western Alps, Calabria, Corsica)

      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

      Accepted manuscript online: 15 MAY 2015 10:12AM EST | DOI: 10.1002/2015GC005767

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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

      Article first published 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