鲜水河断裂带的构造大地测量

利用短边GPS点阵、短基线标石阵和精密激光测距 ,在与鲜水河断裂带的断层破裂带垂直的剖面上和构造盆地内进行构造大地测量 ,获得了断层软弱带和断层蠕变带上的最佳形变分布。综合利用相关地学成果和理论 ,揭示了构造形变所隐含的动力学信息 ,识别了断层应变带、塑性流变带和主断面在地面的分布范围。用外围GPS远场联测成果探讨了该断裂带的驱动力机制 ,匡正了其“左旋”运动和现今活动速度的含义。最后 。

Modern movement and deformation in the South China Sea shown by GPS measurements and numerical simulation

To better understand the crustal deformation of the South China Sea Basin, we produce a mechanically consistent 2-dimensional model for observing regional velocity field in the South China Sea (SCS). We studied the dominating regional tectonic stress field by geodetic measurements and finite element analysis, the spatial variations of velocity field and strain field, and relative movements among different blocks, using a 2-dimensional model describing crustal deformation of the South China Sea Basin. Strain results show that the SCS is extending at present. The western part of SCS is opening gradually in NW- SE direction from its northern margin to the south, but the eastern part of SCS is opening gradually from its central part to the north and south. In addition, we analyzed the plate kinematics to the deformation of the SCS, using a two-dimensional finite element model. Our simulations results are well explained by available geodetic data. The movement of SCS is resulted from interactions among Indian Plate, Pacific Plate, Philippine Sea Plate, and Eurasian Plate.

2012年5月的艾米利亚-罗马涅地震是否为诱发型地震？耦合流动和地质力学模型评估

由流体的注入和采出所诱发的地震活动已成为一个围绕地下水资源和能源的科学讨论热点。本文展示了流动和地质力学耦合的模拟技术在2012年5月意大利北部卡沃内油田附近发生的破坏性地震(MW6.0和MW5.8)序列的震后分析中的应用。该序列引发了一个问题:这些地震是否可能由石油和天然气生产活动诱发。本文的分析强有力地表明,卡沃内油田流体的采出和注入的联合效应并不是观测到的地震活动的诱因。更普遍地,本文研究表明耦合流动和地质力学的计算模型可将地质、地震构造、测井、流体压力、流动速率和大地测量数据整合,并为评估和管理与诱发型地震活动相关的危害提供一种有希望的方法。