Estimation of current plate motions in Papua New Guinea from Global Positioning System observations

Tregoning, Paul; Lambeck, Kurt; Stolz, A.; Morgan, Peter; McClusky, S.; Beek, Peter van der; McQueen, Herbert; Jackson, Russell J.; Little, Rodney P.; Laing, A. C. M.; Murphy, Brian R.

doi:10.1029/97jb03676

Cited by 164 publications

(196 citation statements)

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“…Other authors have questioned the existence of a North Bismarck Plate [e.g., Curtis, 1973;Krause, 1973;Taylor, 1979]. Tregoning et al [1998a] presented the velocities of two sites in northern Papua New Guinea whose motion, to a first-order approximation, appeared to be consistent with the Pacific Plate motion, although they did note an apparent coherence of the deviation from predicted Pacific Plate motion at both sites. These two sites, Kavieng (KAVI) and Manus Island (MANU), are located north of the Bismarck Sea Seismic Lineation and would be located on a North Bismarck Plate if it were to exist.…”

Section: Tectonic Setting and Existing Modelsmentioning

confidence: 98%

“…These two sites, Kavieng (KAVI) and Manus Island (MANU), are located north of the Bismarck Sea Seismic Lineation and would be located on a North Bismarck Plate if it were to exist. Tregoning et al [1998a] concluded that any possible deviations from Pacific Plate motion at these sites were within the uncertainties of their velocity estimates.…”

Section: Tectonic Setting and Existing Modelsmentioning

confidence: 99%

“…We solved for a free network global polyhedron which we then aligned with the ITRF97 [Boucher et al, 1999] by computing Helmert transformations on the coordinates and velocities of the 47 class A and B core IGS sites [Altamimi, 1998]. These analysis procedures have been well documented by, for example, Feigl et al [1993], Dong et al [1998], and Tregoning et al [1998a]. Detailed information regarding the geodetic solution presented in this paper is provided in Appendix A.…”

Section: Geodetic Datamentioning

confidence: 99%

“…[10] The geodetic data used in this analysis have been collected primarily from global tracking stations of the International GPS Service (IGS) and from campaign-style GPS surveys in Papua New Guinea [McClusky et al, 1994;Tregoning et al, 1998aTregoning et al, , 1999Tregoning et al, , 2000 and Indonesia [Tregoning et al, 1994], along with observations made at Wuvulu in November 1999 and Manus in October 2000.…”

Section: Geodetic Datamentioning

confidence: 99%

“…Several authors [e.g., Seno et al, 1993;Kato et al, 1996;Tregoning et al, 1998a] have presented models of the motion of some of these plates in the region derived using combinations of geologic, seismic, and geodetic data.…”

Section: Introductionmentioning

confidence: 99%

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Plate kinematics in the western Pacific derived from geodetic observations

Tregoning

2002

J. Geophys. Res.

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Plate kinematics have been derived from GPS site velocities spanning Australasia and the western Pacific and define a framework in which deformation fields at plate boundaries can be investigated. The Australian Plate appears to be rigid from Cocos Island in the west to Noumea in the east and incorporating all of the Australian continent. A revision of the angular velocity vector of the Pacific Plate using six site velocities has led to the detection of significant relative motion between the Pacific Plate and sites in northern Papua New Guinea. This provides strong evidence in support of a North Bismarck Plate between the South Bismarck and Pacific Plates and we model the motion of the North Bismarck Plate with the angular velocity vector (45.0°S, 126.4°E, 0.85°/Myr). These new angular velocity vectors model the rigid plate motions of a substantial part of the Australasian and western Pacific regions with an accuracy better than 3 mm/yr.

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Section: Tectonic Setting and Existing Modelsmentioning

confidence: 98%

Section: Tectonic Setting and Existing Modelsmentioning

confidence: 99%

Section: Geodetic Datamentioning

confidence: 99%

Section: Geodetic Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plate kinematics in the western Pacific derived from geodetic observations

Tregoning

2002

J. Geophys. Res.

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Anisotropy beneath a highly extended continental rift

Eilon

Abers

Jin

et al. 2014

Geochem Geophys Geosyst

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We have employed shear wave splitting techniques to image anisotropy beneath the D'Entrecasteaux Islands, in southeastern Papua New Guinea. Our results provide a detailed picture of the extending continent that lies immediately ahead of a propagating mid-ocean ridge tip; we image the transition from continental to oceanic extension. A dense shear wave splitting data set from a 2010 to 2011 passive-source seismic deployment is analyzed using single and multichannel methods. Splitting delay times of 1-1.5 s are observed and fast axes of anisotropy trending N-S, parallel to rifting direction, predominate the results. This trend is linked to lattice-preferred orientation of olivine, primarily in the shallow convecting mantle, driven by up to 200 km of N-S continental extension ahead of the westwardpropagating Woodlark Rift. This pattern differs from several other continental rifts that evince rift-strikeparallel fast axes and is evident despite the complex recent tectonic history. We contend that across most of this rift, the unusually high rate and magnitude of extension has been sufficient to produce a regime change to a mid-ocean-ridge-like mantle fabric. Stations in the south of our array show more complex splitting that might be related to melt or to complex inherited structure at the edge of the extended region.

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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

DesOrmeau

Gordon

Little

et al. 2014

Geochem. Geophys. Geosyst.

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Domal structures within the D'Entrecasteaux Islands of eastern Papua New Guinea expose ultrahigh-pressure (UHP) Pliocene (5.6-4.6 Ma) eclogites and evidence for partial melting. To better interpret the (U)HP exhumation history, U-Pb geochronology and trace-element abundances were determined in zircon from variably deformed host gneiss and crystallized melt (leucosomes, sills, dikes, and plutons) from the Goodenough and Normanby Domes by ID-TIMS (isotope-dilution thermal ionization mass spectrometry) and ICP-MS (inductively coupled plasma mass spectrometry), respectively, to constrain the timing of melt crystallization and deformation relative to UHP metamorphism. Zircons extracted from orthogneiss and deformed granodiorite sills of Normanby Dome, located 40 km southeast of the UHP eclogite, record HP metamorphism from 5.66 6 0.02 to 5.04 6 0.07 Ma, and melt crystallization at 4.1 Ma. Strongly deformed, layer-parallel leucosomes from Goodenough Dome, 20 km northwest of the UHP eclogite, began to crystallize by 3.85 6 0.02 Ma. These dates indicate that melt crystallization began in the Goodenough and Normanby Domes within 0.75 m.y. of (U)HP metamorphism. The ID-TIMS dates from the orthogneiss and crystallized melt show that exhumation and cooling of the (U)HP rocks in the PNG terrane began first in the east, within Normanby Dome, then to the west, in the Goodenough Dome 1 m.y. later, and finally the middle dome rocks, exposed within the Mailolo Dome, cooled 2 m.y. after exhumation of Normanby Dome. All domes reveal synchronous crystallization of late, nondeformed melts, and final extension-driven exhumation by 1.82 6 0.03 Ma.

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Estimation of current plate motions in Papua New Guinea from Global Positioning System observations

Cited by 164 publications

References 48 publications

Plate kinematics in the western Pacific derived from geodetic observations

Plate kinematics in the western Pacific derived from geodetic observations

Anisotropy beneath a highly extended continental rift

Tracking the exhumation of a Pliocene (U)HP terrane: U-Pb and trace-element constraints from zircon, D'Entrecasteaux Islands, Papua New Guinea

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