Dense GPS Array observations across the Atotsugawa fault, central Japan
Dense GPS Array observations across the Atotsugawa fault, central Japan
复制标题
日本中部阿托津川断层上的密集 GPS 阵列观测
DOI：
10.1029/2002gl015035
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发表时间：
2003
影响因子：
5.2
通讯作者：
T. Ohkura
中科院分区：
文献类型：
--
作者：
K. Hirahara;Y. Ooi;M. Ando;Y. Hoso;Y. Wada;T. Ohkura
建立了一个跨断层GPS阵列，以揭示位于日本中部大应变率带的Atotsugawa断层周围的地壳运动。该阵列沿30公里基线有7个站点。四年的观测描绘了一个特征速率场；在离断层25 km处，东、西5 mm/yr的运动逐渐减小，运动方向随着靠近断层而向ENE - WSW断层走向转变。这些观察结果可以用一个简单的模型来解释；两个15公里厚的弹性块体沿Atotsugawa断层沿EW方向以20毫米/年的速度斜碰撞。而在Atotsugawa断裂和Ushikubi断裂夹心的区域，速率较小，速率矢量具有断层正向分量，表明碰撞边界形成了一个低弹性或非弹性的区域。
A cross‐fault GPS array is established to reveal the crustal motion around the Atotsugawa fault located in a large strain rate zone, in central Japan. The array has 7 sites along a baseline of 30 km. Four‐year observations delineate a characteristic rate field; the eastward and the westward motions of 5 mm/yr at the sites 25 km apart from the fault gradually decrease and the directions of the motion change towards the ENE‐WSW fault strike, as approaching the fault. These observations are explained by a simple model; two 15‐km thick elastic blocks are obliquely colliding along the Atotsugawa fault with a rate of 20 mm/yr in an EW direction. However, in the zone sandwiched by the Atotsugawa and the Ushikubi faults, the rates are small and the rate vectors have the fault‐normal components, suggesting that the collision boundary forms a zone with lower elasticity or inelastic property.
影响因子：
3
作者：
Y. Okada
通讯作者：
Y. Okada