We use geodetic techniques to study the India-Eurasia collision zone. Six years of GPS data constrain maximum surface contraction rates across the Nepal Himalaya to 18 +- 2 mm/yr at 12 deg N +- 13 deg (1#sigma#). These surface rates across the 150-km-wide deforming zone are well fitted with a dislocation model of a buried north dipping detachment fault striking 105 deg, which aseismically slips at a rate of 20 +- 1 mm/yr, our preferred estimate for the India-to-southern-Tibet convergence rate. This is in good agreement with various geologic predictions of 18 +- 7 mm/yr for the Himalaya. A better fit can be achieved with a two-fault model, where the western and eastern faults strike 112 deg and 101 deg, respectively, in approximate parallelism with the Himalayan arc and a seismicity lineament. We find eastward directed extension of 11 +- 3 mm/yr between northwestern Nepal Lhasa, also in good agreement with geologic and seismic studies across the southern Tibetan plateau. Continuous GPS sites are used to further constrain the style and rates of deformation throughout the collision zone. Sites in India, Uzbekistan, and Russia agree within error with plate model prediction.
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机译：我们使用大地测量技术来研究印度与欧亚大陆的碰撞带。六年的GPS数据将尼泊尔喜马拉雅山的最大地面收缩率限制在12度N + 13度（1＃sigma＃）下为18±2 mm / yr。这些在150公里宽变形带上的地表速率与埋藏着北俯冲断层走向105度的位错模型非常吻合，该地震模型以20 +/- 1毫米/年的速度发生了地震滑移，这是我们首选的估算值。印度到南方西藏的融合率。这与喜马拉雅山对18±7毫米/年的各种地质预测非常吻合。可以通过两断层模型实现更好的拟合，在该模型中，西部断层和东部断层分别与喜马拉雅弧和地震活动线近似平行，分别走向112度和101度。我们发现尼泊尔西北拉萨之间向东延伸了11±3 mm / yr，这也与整个青藏高原南部的地质和地震研究相吻合。连续的GPS站点用于进一步限制整个碰撞区域的变形样式和变形率。印度，乌兹别克斯坦和俄罗斯的站点与板块模型预测存在误差。
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