Space-geodetic estimation of the Nazca-South America Euler vector

D. Angermann; J. Klotz; C. Reigber

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Space-geodetic estimation of the Nazca-South America Euler vector

机译：纳斯卡南美洲欧拉向量的空间大地估算

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GPS data from four sites in the Nazca Plate (Easter Island, Galapagos, Robinson Crusoe and San Felix Islands) and from five sites in the stable core of the South American Plate enabled us to estimate the Euler vector of the Nazca Plate with respect to South America. The observed velocities of Easter Island (6.6 cm/yr at 102.3), Galapagos (5.1 cm/yr at 90.0 deg), Robinson Crusoe (6.6 cm/yr at 80.1 deg) and San Felix (6.0 cm/yr at 82.1 deg) are significantly slower than the global plate model NUVEL-1A velocities for those four sites. Our estimated Euler pole is located at 48.8 deg N, 91.7 deg W with a rate of 0.59 deg/m.y. The NUVEL-1A and earlier space-geodetic studies give rotation rates that are 20% faster.

机译：来自纳斯卡板块的四个站点（复活节岛，加拉帕戈斯，鲁滨逊漂流记和圣费利克斯群岛）以及南美板块稳定核心地带的五个站点的GPS数据使我们能够估计纳斯卡板块相对于南欧拉的欧拉矢量美国。复活节岛（102.3处为6.6厘米/年），加拉帕戈斯群岛（90.0度处为5.1厘米/年），鲁滨逊漂流记（80.1度处为6.6厘米/年）和圣费利克斯（82.1度处为6.0厘米/年）的观测速度为这四个位置的速度明显低于全局板块模型NUVEL-1A的速度。我们估计的欧拉极位于北纬48.8度，西经91.7度，速率为0.59度/米。 NUVEL-1A和早期的空间大地测量研究得出的旋转速度快了20％。

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《Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System》 |1999年第3期|共6页
作者
D. Angermann; J. Klotz; C. Reigber;
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正文语种 eng
中图分类天文学、地球科学;
关键词
Global Positioning System; movement; plate tectonics; Nazca Plate; South American Plate; plate convergence;

机译：全球定位系统;运动;板块构造;纳斯卡板块;南美板块;板块汇聚;

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Space-geodetic estimation of the Nazca-South America Euler vector

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