Plate tectonics from SLR and VLBI global data

Robaudo, Stefano; Harrison, C. G. A.

doi:10.1029/gd023p0051

Cited by 28 publications

(14 citation statements)

References 44 publications

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“…It is therefore of interest to investigate discrepancies where the models are better determined, for example Nazca-Pa½ific motion, one of the best determined relative plate velocities in the NUVEL model, and Nazca-South America motion, an important kinematic boundary condition for Andean tectonics, relatively well determined based on plate circuit closure (e.g., Figures 43 and 44 of DeMets et al [1990]). Initial space geodetic estimates of the rate of Nazca-Pacific spreading and Nazca-South America convergence [Robbins et al, 1993;Robaudo and Harrison, 1993] suggested that present-day rates are slower than the 3 million year average rate. Norabuena et al [1998] derived an Euler (angular velocity) vector for NazcaSouth America and suggested that present convergence for the central Andes is 12% slower than the NUVEL-1A prediction.…”

mentioning

confidence: 99%

Decelerating Nazca‐South America and Nazca‐Pacific Plate motions

Norabuena¹,

Dixon²,

Stein³

et al. 1999

Geophysical Research Letters

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159

109

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Abstract.Space geodetic estimates of the rate of Nazca-South America convergence and Nazca-Pacific spreading averaging over several years show that present day rates are significantly slower than the 3 million year average NUVEL-1A model. The implied rates of deceleration are consistent with longer term trends extending back to at least 20 Ma, about the time of initiation of Andes growth, and may reflect consequences of ongoing subduction and construction of the Andes, e.g., increased friction and viscous drag on the subducted slab as the leading edge of South America thickens.

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mentioning

confidence: 99%

Decelerating Nazca‐South America and Nazca‐Pacific Plate motions

Norabuena¹,

Dixon²,

Stein³

et al. 1999

Geophysical Research Letters

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159

109

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“…Eurasian plate. This location is known to have anomalous motion with respect to the Eurasian plate that might be caused by the collision of the plates (Sasaki, 1990;Smith et al, 1990;Robbins, et al, 1993;Robaudo and Harrison, 1993). The distance from Simosato to the Nankai Trough is about 100 km and the velocity of the subducting Philippine Sea plate with respect to the Eurasian plate is about 4-5 cm/yr in this area.…”

Section: Velocity Estimates Of Stations From Arc Length Ratesmentioning

confidence: 99%

“…Robbins et al (1993) showed that SLR and VLBI observations across plate boundaries are 6.3% slower than NUVEL-1. Robaudo and Harrison (1993) determined the Euler vectors of plate motion from SLR and VLBI results. Discrepancies with NUVEL-1, that is, the difference between plate motion averaged over millions of years and several years, are generally within the errors of the geodetic estimates.…”

Section: Plate Motion Studies By Slrmentioning

confidence: 99%

“…Cenci et al (1993) also concluded that the motion of Matera is similar to the African plate from the analysis of LAGEOS. Robaudo and Harrison (1993) estimated the motion of the Adriatic block by combining Matera and Medicina, a VLBI station in northern Italy. Based on a combination of SLR and GPS data, Noomen et al (1996) found a deviation with respect to Africa motion of a mere 2 mm/year.…”

Section: Velocity Estimates Of Stations From Arc Length Ratesmentioning

confidence: 99%

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A plate motion study using Ajisai SLR data

Sengoku¹

2014

Earth Planet Sp

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Eight years of Ajisai SLR data were processed to determine the terrestrial reference frame and its time evolution. The typical precision and accuracy of the estimated geocenter position averaged over a year determined from a oneyear Ajisai SLR data set are 1 cm and 1.5 cm, respectively. The baselines between SLR stations away from plate boundaries show rates of change that are in good agreement with NUVEL-1A, ITRF93 and LAGEOS results but significant deviations from geologically determined plate motion models are found for stations in plate boundary regions. Velocities of the observation stations were estimated by a weighted least squares method. The Simosato SLR station, located 100 km away from the plate boundary between the Eurasian plate and the Philippine Sea plate, moves in the direction of the subduction of the Philippine Sea plate with respect to the Eurasian plate, which infers strong coupling of the two plates at the boundary. The motion of other stations at plate boundary regions is also discussed. This study is the first attempt to use Ajisai SLR data to determine the global terrestrial reference frame and its variation, thus independent of the previous SLR studies most of which were based on LAGEOS SLR analyses.

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“…New types of information can also be used to constrain plate motions, especially space-based methods such as very long baseline interferometry (VLBI), satellite laser ranging (Harrison and Douglas 1990;Robaudo and Harrison 1993), Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS), and most importantly today the Global Positioning System (GPS). These give relative motions over a few years to a decade or more.…”

Section: Introductionmentioning

confidence: 99%

The present-day number of tectonic plates

Harrison

2016

Earth Planet Sp

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The number of tectonic plates on Earth described in the literature has expanded greatly since the start of the plate tectonic era, when only about a dozen plates were considered in global models of present-day plate motions. With new techniques of more accurate earthquake epicenter locations, modern ways of measuring ocean bathymetry using swath mapping, and the use of space based geodetic techniques, there has been a huge growth in the number of plates thought to exist. The study by Bird (2003) proposed 52 plates, many of which were delineated on the basis of earthquake locations. Because of the pattern of areas of these plates, he suggested that there should be more small plates than he could identify. In this paper, I gather together publications that have

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Plate tectonics from SLR and VLBI global data

Cited by 28 publications

References 44 publications

Decelerating Nazca‐South America and Nazca‐Pacific Plate motions

Decelerating Nazca‐South America and Nazca‐Pacific Plate motions

A plate motion study using Ajisai SLR data

The present-day number of tectonic plates

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