New kinematic models for Pacific‐North America motion from 3 Ma to present, I: Evidence for steady motion and biases in the NUVEL‐1A Model

DeMets, Charles; Dixon, Timothy H.

doi:10.1029/1999gl900405

Cited by 310 publications

(266 citation statements)

References 13 publications

(7 reference statements)

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“…The estimate of Tregoning et al [1998a] in ITRF94 used seven sites and differed considerably from that of Larson et al [1997]. DeMets and Dixon [1999] used data from five IGS sites to estimate [Sillard et al, 1998] (Table 1) and derived a value similar to this study. The estimates from different investigators are converging on similar values as the time span of the geodetic data increases and the distribution of sites spanning the Pacific Plate improves.…”

Section: Pacific Platementioning

confidence: 98%

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: Pacific Platementioning

confidence: 98%

Plate kinematics in the western Pacific derived from geodetic observations

Tregoning

2002

J. Geophys. Res.

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“…A problem with this approach is that the current plate motions observed geodetically disagree with NUVEL-1A either because of the nonsteady state motion of plates within the last 3 Ma or because of errors in the geologic model [Argus et al, 1999;DeMets and Dixon, 1999;Calais et al, 2003a;Steblov et al, 2003].…”

Section: Reference Frame Consistent With Plate Kinematicsmentioning

confidence: 99%

“…Some discrepancies between geodetic and geologic models were resolved due to improvements in the geologic plate model based on updated marine magnetic surveys [DeMets and Dixon, 1999;Calais et al, 2003a]. Other discrepancies require reinterpretations of plate geometries in terms of two or more smaller plates and belts of distributed deformation [Gordon et al, 1998;Bird, 2003;Horner-Johnson et al, 2007].…”

Section: Introductionmentioning

confidence: 99%

“…[7] The model of the plate kinematics presented here addresses the problem debated since the beginning of the space geodesy, How big are disagreements between the current plate motions and the motions averaged over several million years, the ''geologic'' timescale [Argus and Heflin, 1995;Larson et al, 1997;DeMets and Dixon, 1999;Kogan et al, 2000;Beavan et al, 2002;Sella et al, 2002;Calais et al, 2003a;Steblov et al, 2003]? Some discrepancies between geodetic and geologic models were resolved due to improvements in the geologic plate model based on updated marine magnetic surveys [DeMets and Dixon, 1999;Calais et al, 2003a].…”

Section: Introductionmentioning

confidence: 99%

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Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame

Коган¹,

Steblov²

2008

J. Geophys. Res.

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[1] We present the vectors of rotation of 10 major lithospheric plates, estimated from continuous GPS observations at 192 globally distributed stations; 71 stations were selected as representing stable plate regions. All days for the period 1995.0-2007.0 were included in the analysis. In contrast to previous GPS plate models, our model is independent of international terrestrial reference frames (ITRF). The origin of our plate-consistent reference frame is the center of plate rotation (CP) rather than the center of mass of the entire Earth's system (CM) as in recent versions of ITRF. We estimate plate rotations and CP by minimizing the misfit between the horizontal velocities predicted by the plate model and the observed GPS velocities. If any version of ITRF is used as the reference frame, the drift of the ITRF origin relative to CP cannot be neglected in estimation of plate rotation vectors and plate-residual station velocities. The model of the plate kinematics presented here addresses the problem debated since the beginning of the space geodesy: how big are disagreements between the current plate motions and the motions averaged over several million years? We compare the vectors of relative plate rotations estimated here with the published vectors from GPS and geologic models. We also discuss the integrity of individual plates as exhibited by plate-residual station velocities. For seven largest plates, the RMS value of plate-residual station velocities in stable plate interiors is 0.5-0.9 mm/a; this value is an upper bound on deviation of real plates from infinite stiffness.

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“…The southern San Andreas and the San Jacinto fault zones are the two principal structures, together accommodating ∼35 mm/yr, that is ∼80%, of the Pacific-North America (PA-NA) relative plate motion in this region [King and Savage, 1983;DeMets and Dixon, 1999;Bennett et al, 1996;Fialko, 2006]. Geodetically derived slip rate estimates are on the order of 10-20 mm/yr for both of these fault zones, but only 2-6 mm/yr for the Elsinore fault zone [Johnson et al, 1994;Bennett et al, 1996;Meade and Hager, 2005;Becker et al, 2005;Fay and Humphreys, 2005].…”

Section: Introductionmentioning

confidence: 99%

Late Quaternary slip rate gradient defined using high‐resolution topography and ¹⁰Be dating of offset landforms on the southern San Jacinto Fault zone, California

et al. 2010

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Recent studies suggest the San Jacinto fault zone may be the dominant structure accommodating PA‐NA relative plate motion. However, because the late Quaternary slip history of the southern San Andreas fault system is insufficiently understood, it is difficult to evaluate the partitioning of deformation across the plate boundary and its evolution. Landforms displaced by the Clark fault of the southern San Jacinto fault zone were mapped using high‐resolution airborne laser‐swath topography and selected offset landforms were dated using cosmogenic 10Be. Beheaded channels at Rockhouse Canyon, displaced by 500 ± 70 m and 220 ± 70 m, have been dated to 47 ± 8 ka and 28 ± 9 ka, respectively. Farther south, near the southern Santa Rosa Mountains, an alluvial deposit displaced by 51 ± 9 m has been dated to 35 ± 7 ka. From these sites, the slip rate of the Clark fault is determined to diminish southward from 8.9 ± 2.0 to 1.5 ± 0.4 mm/yr. This implies a slip‐rate decrease along the Clark fault from Anza southeastward to its surface termination near the Salton Trough, where slip is transferred to the Coyote Creek fault, and additional deformation is compensated by folding and thrusting in the basin. These data suggest that since ∼30 to 50 ka, the slip rate along the southern San Jacinto fault zone has been lower than, or equivalent to, the rate along the southernmost San Andreas fault. Accordingly, either the slip rate of the San Jacinto fault has substantially decreased since fault initiation, or fault slip began earlier than previously suggested.

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New kinematic models for Pacific‐North America motion from 3 Ma to present, I: Evidence for steady motion and biases in the NUVEL‐1A Model

Cited by 310 publications

References 13 publications

Plate kinematics in the western Pacific derived from geodetic observations

Plate kinematics in the western Pacific derived from geodetic observations

Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame

Late Quaternary slip rate gradient defined using high‐resolution topography and ¹⁰Be dating of offset landforms on the southern San Jacinto Fault zone, California

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New kinematic models for Pacific‐North America motion from 3 Ma to present, I: Evidence for steady motion and biases in the NUVEL‐1A Model

Cited by 310 publications

References 13 publications

Plate kinematics in the western Pacific derived from geodetic observations

Plate kinematics in the western Pacific derived from geodetic observations

Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame

Late Quaternary slip rate gradient defined using high‐resolution topography and 10Be dating of offset landforms on the southern San Jacinto Fault zone, California

Contact Info

Product

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Late Quaternary slip rate gradient defined using high‐resolution topography and ¹⁰Be dating of offset landforms on the southern San Jacinto Fault zone, California