Initial results from WING, the continuous GPS network in the western Pacific area

Kato, Teruyuki; Kotake, Yoshiko; Nakao, Shigeru; Beavan, John; Hirahara, Kazuro; Okada, Masami; Hoshiba, Mitsuyuki; Kamigaichi, Osamu; Feir, R. B.; Park, Pil Ho; Gerasimenko, Mikhail; Kasahara, Minoru

doi:10.1029/97gl03765

Cited by 59 publications

(41 citation statements)

References 16 publications

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“…Current rates along the fault are in the order of or lower than the 5 mm/yr proposed by Allen et al (1994) and Wang et al (1998) using geological data. This corroborates differential motions from GPS measurements in eastern Tibet (King et al, 1997;Wang et al, 1998) but contradicts assumptions by others (Zhao, 1995;Peltzer and Saucier, 1996). Results from recent measurements in a local GPS network along the southern part of the Red River Fault suggest similar, low motion (if any) along this part of the fault .…”

Section: 2supporting

confidence: 76%

“…This suggests that the area west of the Xiaojiang Fault and Kunming and east of the eastern syntaxis of India moves southward with a rate of approximately 15 mm/yr with respect to SSC (see King et al, 1997, for comparison). This confirms that a major part of the differential motion between Lhasa and Kunming is accommodated by rotation about the eastern syntaxis of India (King et al, 1997;Ratschbacher et al, 1996).…”

Section: The Red River Fault Differential Motion Between the Stationssupporting

confidence: 68%

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Crustal motion in E-and SE-Asia from GPS measurements

et al. 2014

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Repeated GEODYSSEA-GPS measurements and additional GPS data from the IGS and APRGP97/98 constrain the motion of SE-Asia within a global reference frame. Sundaland i.e. Indochina as well as the western and central part of Indonesia, together with South-China, constitute an apparently stable tectonic block that is decoupled from Eurasia. In the ITRF97 this block moves to the east about an Euler pole approximating that of Eurasia, but with a velocity that is one third higher than the eastward directed movement of Eurasia. With respect to India and Australia the Sundaland-South China block is moving due south. This suggests that a) Sundaland-South China are moving coherently to the East along the boundaries studied and b) the eastward motion of India is compensated by the eastward motion of Sundaland-South China. The current rather homogeneous kinematic behaviour of SundalandSouth China that differs in rate (no more than 5 mm) rather than direction from the movement of N-China differs from the kinematics proposed by different modelling approaches throughout the literature. The data help to constrain locations and behaviour of the active fault zones and give information on the interplate and intraplate deformation in the area.

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Section: 2supporting

confidence: 76%

Section: The Red River Fault Differential Motion Between the Stationssupporting

confidence: 68%

Crustal motion in E-and SE-Asia from GPS measurements

et al. 2014

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“…Recent GPS measurements revealed that both the Philippine Sea plate and the Mariana Ridge are moving westward relative to the Eurasia [Kato et al, 1998;Sella et al, 2002], and the opening of the Mariana Trough occurs because the movement of the former is faster than the latter. This observation is not consistent with the opening model assuming a trench rollback [Martinez and Fryer, 2000].…”

Section: Discussionmentioning

confidence: 99%

Spreading process of the northern Mariana Trough: Rifting‐spreading transition at 22°N

Yamazaki

Seama

Okino

et al. 2003

Geochem Geophys Geosyst

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[1] We have conducted a geophysical survey of the northern Mariana Trough from 19°N to 24°N. The trough evolves southward from incipient rifting to seafloor spreading within this region. This study aims to clarify the location and time of the rifting-to-spreading transition, which was controversial previously, and processes of seafloor spreading after the transition. The new data set includes swath bathymetry with sidescan images and magnetic vector anomaly. The mantle Bouguer gravity anomaly (MBA) was calculated using the free-air gravity anomaly from satellite altimetry. The rifting-to-spreading transition occurs at about 22°N, which is proved by seafloor-spreading fabric in the bathymetry, clear magnetic lineations, and the bull's-eye pattern in MBA. Four ridge segments separated by three nontransform discontinuities are recognized between 19°N and 22°N. The northernmost segment has relatively abundant magma supply compared with the other segments, which is estimated from a larger segment length, shallower axial depths with no rift valley, and lower MBA. The next segment to the south is, on the other hand, a magma-starved segment with a prominent rift valley. Two anomalously deep grabens (called the Central Grabens) formed by amagmatic extension occur near the segment ends. The succession of magma-rich, magma-starved, and normal segments with increasing distance from the volcanic arc is the same as the observation in the Lau Basin reported by Martinez and Taylor spreading center have been significantly larger than the eastern counterpart in general. The asymmetry may have been caused by an interaction of mantle upwelling systems under the volcanic front and the backarc spreading center and would be a characteristic of backarc spreading.

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“…[11] The data were analyzed as daily global solutions using the GAMIT/GLOBK software [King and Bock, 1999;Herring, 1999] to combine regional data with data from up to 80 IGS stations. 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].…”

Section: Geodetic Datamentioning

confidence: 99%

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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Initial results from WING, the continuous GPS network in the western Pacific area

Abstract: Abstract.To

Cited by 59 publications

References 16 publications

Crustal motion in E-and SE-Asia from GPS measurements

Crustal motion in E-and SE-Asia from GPS measurements

Spreading process of the northern Mariana Trough: Rifting‐spreading transition at 22°N

Plate kinematics in the western Pacific derived from geodetic observations

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